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<title>Step-Down Transformer Collection | Industrial Power Conversion</title>
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<p class="inline-flex rounded-full border border-white/25 bg-white/10 px-3 py-1 text-xs font-semibold uppercase tracking-[0.16em] text-slate-100">
High Reliability Step-Down Power Platform
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<h1 class="mt-5 font-display text-5xl uppercase leading-[0.96] text-white md:text-7xl">
High-Efficiency Step-Down Transformers: Industrial Grade Power Conversion
</h1>
<p class="mt-5 max-w-2xl text-sm leading-relaxed text-slate-200 md:text-base">
Up to 99.7% efficiency with high-permeability silicon steel cores. Compliant with DOE 2029 & UL/CE standards. Custom units delivered in 4-6 weeks.
</p>
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Get a Professional Quote
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Download Full Catalog
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<span class="rounded-md border border-white/30 bg-white/10 px-3 py-1.5 font-semibold">UL</span>
<span class="rounded-md border border-white/30 bg-white/10 px-3 py-1.5 font-semibold">CE</span>
<span class="rounded-md border border-white/30 bg-white/10 px-3 py-1.5 font-semibold">CSA</span>
<span class="rounded-md border border-white/30 bg-white/10 px-3 py-1.5 font-semibold">DOE 2029 Ready</span>
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</section>
<section class="mx-auto max-w-7xl px-6 py-14 md:px-10">
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<div>
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">Sub-Category Navigation</p>
<h2 class="mt-2 font-display text-4xl uppercase leading-none text-[#1A365D] md:text-5xl">Step-Down Transformer Family</h2>
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<p class="max-w-xl text-sm text-slate-600">Quickly route by phase type and application profile. Tap any card to preview PDF instantly without leaving this page.</p>
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<article class="rounded-2xl border border-slate-200 bg-white p-4 shadow-sm">
<img src="https://images.unsplash.com/photo-1554475901-4538ddfbccc2?auto=format&fit=crop&w=1000&q=80" alt="Industrial three-phase step-down transformer" class="h-40 w-full rounded-xl bg-white object-cover" />
<h3 class="mt-4 font-display text-2xl uppercase text-[#1A365D]">Industrial Three-Phase</h3>
<p class="mt-1 text-sm font-semibold text-slate-700">30kVA - 10,000kVA</p>
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Preview PDF
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<img src="https://images.unsplash.com/photo-1532619187608-e5375cab36d4?auto=format&fit=crop&w=1000&q=80" alt="Single-phase control transformer" class="h-40 w-full rounded-xl bg-white object-cover" />
<h3 class="mt-4 font-display text-2xl uppercase text-[#1A365D]">Single-Phase Control</h3>
<p class="mt-1 text-sm font-semibold text-slate-700">50VA - 25kVA</p>
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<img src="https://images.unsplash.com/photo-1581092160607-ee22621dd758?auto=format&fit=crop&w=1000&q=80" alt="Medical and lab isolation transformer" class="h-40 w-full rounded-xl bg-white object-cover" />
<h3 class="mt-4 font-display text-2xl uppercase text-[#1A365D]">Medical & Lab Isolation</h3>
<p class="mt-1 text-sm font-semibold text-slate-700">Precise voltage, zero hum</p>
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<img src="https://images.unsplash.com/photo-1584276433295-4b8d1b0b7f20?auto=format&fit=crop&w=1000&q=80" alt="Toroidal step-down transformer" class="h-40 w-full rounded-xl bg-white object-cover" />
<h3 class="mt-4 font-display text-2xl uppercase text-[#1A365D]">Toroidal Step-Down</h3>
<p class="mt-1 text-sm font-semibold text-slate-700">7x24 continuous, compact design</p>
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</section>
<section class="bg-[#1A365D] py-10">
<div class="mx-auto max-w-7xl px-6 md:px-10">
<p class="text-center text-xs font-extrabold uppercase tracking-[0.15em] text-slate-200">Compliance Evidence Strip</p>
<div class="mt-4 grid gap-3 sm:grid-cols-2 lg:grid-cols-4">
<img src="https://images.unsplash.com/photo-1454165804606-c3d57bc86b40?auto=format&fit=crop&w=900&q=80" alt="UL certification document photo" class="h-24 w-full rounded-lg object-cover" />
<img src="https://images.unsplash.com/photo-1423666639041-f56000c27a9a?auto=format&fit=crop&w=900&q=80" alt="CE certificate photo" class="h-24 w-full rounded-lg object-cover" />
<img src="https://images.unsplash.com/photo-1450101499163-c8848c66ca85?auto=format&fit=crop&w=900&q=80" alt="CSA certificate photo" class="h-24 w-full rounded-lg object-cover" />
<img src="https://images.unsplash.com/photo-1554224154-22dec7ec8818?auto=format&fit=crop&w=900&q=80" alt="RoHS compliance report photo" class="h-24 w-full rounded-lg object-cover" />
</div>
</div>
</section>
<section class="mx-auto max-w-7xl px-6 py-14 md:px-10">
<div class="grid gap-8 lg:grid-cols-[1.05fr_0.95fr]">
<div class="rounded-2xl border border-slate-200 bg-white p-6 md:p-8">
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">Selection Support</p>
<h2 class="mt-2 font-display text-4xl uppercase leading-none text-[#1A365D] md:text-5xl">Real-Time Efficiency & TCO Calculator</h2>
<p class="mt-4 text-sm text-slate-600">Stop Paying for Energy Loss. Calculate Your Savings Today.</p>
<div class="mt-7 space-y-6">
<div>
<label for="kvaRange" class="flex items-center justify-between text-sm font-semibold text-slate-800">
<span>Equipment Load (kVA)</span>
<span id="kvaValue" class="font-extrabold text-[#1A365D]">500</span>
</label>
<input id="kvaRange" type="range" min="10" max="10000" step="10" value="500" class="mt-2 h-2 w-full cursor-pointer appearance-none rounded bg-slate-200" />
</div>
<div>
<label for="hoursRange" class="flex items-center justify-between text-sm font-semibold text-slate-800">
<span>Annual Runtime Hours</span>
<span id="hoursValue" class="font-extrabold text-[#1A365D]">6000</span>
</label>
<input id="hoursRange" type="range" min="500" max="8760" step="10" value="6000" class="mt-2 h-2 w-full cursor-pointer appearance-none rounded bg-slate-200" />
</div>
<p class="rounded-lg border border-amber-200 bg-amber-50 px-3 py-2 text-xs font-medium text-amber-900">
Assumption: electricity cost = $0.12/kWh. Compare 99.7% vs 95% efficiency.
</p>
</div>
</div>
<div class="rounded-2xl border border-slate-200 bg-white p-6 md:p-8">
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">Savings Output</p>
<h3 class="mt-2 font-display text-3xl uppercase leading-none text-[#1A365D]">Projected Energy Cost Savings</h3>
<div class="mt-6 grid gap-3">
<div class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<p class="text-xs font-semibold uppercase tracking-[0.1em] text-slate-600">5 Years</p>
<p id="save5" class="mt-1 text-2xl font-extrabold text-[#1A365D]">$0</p>
</div>
<div class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<p class="text-xs font-semibold uppercase tracking-[0.1em] text-slate-600">10 Years</p>
<p id="save10" class="mt-1 text-2xl font-extrabold text-[#1A365D]">$0</p>
</div>
<div class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<p class="text-xs font-semibold uppercase tracking-[0.1em] text-slate-600">25 Years</p>
<p id="save25" class="mt-1 text-2xl font-extrabold text-[#1A365D]">$0</p>
</div>
</div>
</div>
</div>
</section>
<section class="bg-white py-14">
<div class="mx-auto grid max-w-7xl gap-8 px-6 md:px-10 lg:grid-cols-[1fr_1fr] lg:items-center">
<div class="relative rounded-3xl border border-slate-200 bg-slate-100 p-3">
<img src="https://images.unsplash.com/photo-1581093458791-9f3c3900df4b?auto=format&fit=crop&w=1400&q=80" alt="Exploded internal transformer structure" class="h-[360px] w-full rounded-2xl object-cover" />
</div>
<div>
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">Technical Superiority</p>
<h2 class="mt-2 font-display text-4xl uppercase leading-none text-[#1A365D] md:text-5xl">Manufacturing Beyond Standards</h2>
<div class="mt-6 space-y-4">
<article class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<h3 class="text-base font-extrabold text-[#1A365D]">Superior Core Material</h3>
<p class="mt-1 text-sm text-slate-600">High-Permeability Silicon Steel lowers no-load loss and keeps magnetic saturation risk controlled under variable loads.</p>
</article>
<article class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<h3 class="text-base font-extrabold text-[#1A365D]">Pure Copper Windings</h3>
<p class="mt-1 text-sm text-slate-600">100% copper windings deliver lower resistance than aluminum, better thermal cycling tolerance, and longer service life.</p>
</article>
<article class="rounded-xl border border-slate-200 bg-slate-50 p-4">
<h3 class="text-base font-extrabold text-[#1A365D]">Advanced Thermal Management</h3>
<p class="mt-1 text-sm text-slate-600">Designed for 80°C rise class with controlled hot-spot distribution, preventing thermal runaway in harsh-duty environments.</p>
</article>
</div>
</div>
</div>
</section>
<section id="specs" class="mx-auto max-w-7xl px-6 py-14 md:px-10">
<div class="mb-6 flex flex-wrap items-end justify-between gap-4">
<div>
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">Quick Selection</p>
<h2 class="mt-2 font-display text-4xl uppercase leading-none text-[#1A365D] md:text-5xl">Standard Model Matrix</h2>
</div>
<a href="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" download class="inline-flex items-center rounded-md bg-[#ED8936] px-4 py-2 text-sm font-extrabold text-white hover:bg-[#d87625]">Download All Datasheets</a>
</div>
<div class="overflow-x-auto rounded-2xl border border-slate-200 bg-white">
<table class="min-w-full text-left text-sm">
<thead class="bg-slate-100 text-xs uppercase tracking-[0.08em] text-slate-700">
<tr>
<th class="px-4 py-3">Model</th>
<th class="px-4 py-3">Capacity</th>
<th class="px-4 py-3">Input Volts</th>
<th class="px-4 py-3">Output Volts</th>
<th class="px-4 py-3">Mounting</th>
<th class="px-4 py-3">Certification</th>
<th class="px-4 py-3">Datasheet</th>
</tr>
</thead>
<tbody>
<tr class="border-t border-slate-200">
<td class="px-4 py-3 font-semibold">SDT-3P-150</td>
<td class="px-4 py-3">150kVA</td>
<td class="px-4 py-3">480V</td>
<td class="px-4 py-3">208Y/120V</td>
<td class="px-4 py-3">Floor</td>
<td class="px-4 py-3">UL / CE / CSA</td>
<td class="px-4 py-3"><a class="font-bold text-[#1A365D] underline" href="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" download>PDF</a></td>
</tr>
<tr class="border-t border-slate-200 bg-slate-50">
<td class="px-4 py-3 font-semibold">SDT-1P-10</td>
<td class="px-4 py-3">10kVA</td>
<td class="px-4 py-3">240V</td>
<td class="px-4 py-3">120V</td>
<td class="px-4 py-3">Wall / Panel</td>
<td class="px-4 py-3">UL / CE</td>
<td class="px-4 py-3"><a class="font-bold text-[#1A365D] underline" href="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" download>PDF</a></td>
</tr>
<tr class="border-t border-slate-200">
<td class="px-4 py-3 font-semibold">SDT-ISO-5</td>
<td class="px-4 py-3">5kVA</td>
<td class="px-4 py-3">230V</td>
<td class="px-4 py-3">115V</td>
<td class="px-4 py-3">Cabinet</td>
<td class="px-4 py-3">UL / CE / RoHS</td>
<td class="px-4 py-3"><a class="font-bold text-[#1A365D] underline" href="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" download>PDF</a></td>
</tr>
<tr class="border-t border-slate-200 bg-slate-50">
<td class="px-4 py-3 font-semibold">SDT-TOR-2</td>
<td class="px-4 py-3">2kVA</td>
<td class="px-4 py-3">220V</td>
<td class="px-4 py-3">110V</td>
<td class="px-4 py-3">DIN / Chassis</td>
<td class="px-4 py-3">CE / RoHS</td>
<td class="px-4 py-3"><a class="font-bold text-[#1A365D] underline" href="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf" download>PDF</a></td>
</tr>
</tbody>
</table>
</div>
</section>
<section class="bg-[#102b4a] py-14">
<div class="mx-auto max-w-7xl px-6 md:px-10">
<p class="text-xs font-bold uppercase tracking-[0.14em] text-slate-200">Expert Technical Guidance</p>
<h2 class="mt-2 font-display text-4xl uppercase leading-none text-white md:text-5xl">Engineer's Note: 5 Things to Check Before Purchasing</h2>
<div class="mt-6 grid gap-4 md:grid-cols-2 xl:grid-cols-5">
<article class="rounded-xl border border-white/20 bg-white/10 p-4 text-sm text-slate-100">
<h3 class="font-bold text-white">1. Inrush Current Margin</h3>
<p class="mt-2">Size upstream protection for magnetizing inrush peaks, not just steady-state current.</p>
</article>
<article class="rounded-xl border border-white/20 bg-white/10 p-4 text-sm text-slate-100">
<h3 class="font-bold text-white">2. Neutral Configuration</h3>
<p class="mt-2">Validate grounding scheme and neutral bonding to avoid nuisance trips and safety hazards.</p>
</article>
<article class="rounded-xl border border-white/20 bg-white/10 p-4 text-sm text-slate-100">
<h3 class="font-bold text-white">3. Reverse Feeding Limits</h3>
<p class="mt-2">Do not assume bidirectional operation. Thermal design and taps may not support reverse use safely.</p>
</article>
<article class="rounded-xl border border-white/20 bg-white/10 p-4 text-sm text-slate-100">
<h3 class="font-bold text-white">4. Harmonic Content</h3>
<p class="mt-2">High THD loads can increase hotspot temperature and shorten insulation life.</p>
</article>
<article class="rounded-xl border border-white/20 bg-white/10 p-4 text-sm text-slate-100">
<h3 class="font-bold text-white">5. Duty Cycle</h3>
<p class="mt-2">Confirm ambient, altitude, and continuous runtime profile before selecting insulation class.</p>
</article>
</div>
</div>
</section>
<section id="lead-capture" class="mx-auto max-w-7xl px-6 py-14 md:px-10">
<div class="grid gap-8 lg:grid-cols-[1.05fr_0.95fr]">
<div class="rounded-2xl border border-slate-200 bg-white p-6 md:p-8">
<p class="rounded-md border border-emerald-200 bg-emerald-50 px-3 py-2 text-sm font-bold text-emerald-800">Get a technical drawing and quote within 24 hours.</p>
<h2 class="mt-4 font-display text-4xl uppercase leading-none text-[#1A365D] md:text-5xl">Get Your Power Solution</h2>
<form class="mt-6 grid gap-4">
<label class="text-sm font-semibold text-slate-700">Name
<input type="text" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="Your name" />
</label>
<label class="text-sm font-semibold text-slate-700">Company
<input type="text" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="Company name" />
</label>
<label class="text-sm font-semibold text-slate-700">Power Requirement (kVA)
<input type="number" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="e.g., 350" />
</label>
<div class="grid gap-4 md:grid-cols-2">
<label class="text-sm font-semibold text-slate-700">Input Voltage
<input type="text" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="e.g., 480V" />
</label>
<label class="text-sm font-semibold text-slate-700">Output Voltage
<input type="text" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="e.g., 208V" />
</label>
</div>
<label class="text-sm font-semibold text-slate-700">Message
<textarea rows="4" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2.5 text-sm outline-none ring-0 focus:border-[#1A365D]" placeholder="Project context, standards, quantity"></textarea>
</label>
<label class="text-sm font-semibold text-slate-700">Attachment (Single-line diagram / BOM)
<input type="file" class="mt-1 w-full rounded-md border border-slate-300 px-3 py-2 text-sm file:mr-3 file:rounded-md file:border-0 file:bg-[#1A365D] file:px-3 file:py-2 file:text-xs file:font-bold file:text-white" />
</label>
<button type="submit" class="mt-2 inline-flex items-center justify-center rounded-md bg-[#ED8936] px-5 py-3 text-sm font-extrabold text-white transition hover:bg-[#d87625]">Request Engineering Quote</button>
</form>
</div>
<div class="rounded-2xl border border-slate-200 bg-white p-6 md:p-8">
<p class="text-xs font-bold uppercase tracking-[0.14em] text-[#1A365D]">FAQ</p>
<h3 class="mt-2 font-display text-3xl uppercase leading-none text-[#1A365D]">Technical Questions</h3>
<div class="mt-6 space-y-3">
<details class="rounded-lg border border-slate-200 bg-slate-50 p-4" open>
<summary class="cursor-pointer text-sm font-bold text-slate-900">Q: Can I use this transformer in reverse to step up voltage?</summary>
<p class="mt-2 text-sm text-slate-600">A: Some units can electrically operate in reverse, but reverse feeding is limited by insulation coordination, tap arrangement, thermal rise, and safety compliance. Engineering review is required before approval.</p>
</details>
<details class="rounded-lg border border-slate-200 bg-slate-50 p-4">
<summary class="cursor-pointer text-sm font-bold text-slate-900">Q: Do you offer custom kVA ratings for specific equipment?</summary>
<p class="mt-2 text-sm text-slate-600">A: Yes. We provide custom kVA, impedance targets, enclosure forms, and terminal layouts based on your equipment and utility conditions.</p>
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<details class="rounded-lg border border-slate-200 bg-slate-50 p-4">
<summary class="cursor-pointer text-sm font-bold text-slate-900">Q: What certifications are provided for international shipping?</summary>
<p class="mt-2 text-sm text-slate-600">A: Depending on destination, we provide UL, CE, CSA, RoHS and factory test reports with nameplate traceability documentation.</p>
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