ODM vs OEM LED Power Supply: What You Actually Buy

About 90% of buyers who ask for “OEM” actually need ODM. Real OEM — you own the design, the factory builds to your drawings — only makes financial sense above roughly 50,000 units a year. Below that, the tooling cost never amortises. Yet the word “OEM” appears in most RFQs because it sounds more serious than “ODM.”

Here is what each one actually costs and actually buys.

The Difference in One Table

That last row is the one that surprises people. OEM is more expensive per unit until you pass roughly 10,000 units, because the tooling and engineering cost is amortised over a small run. Below that threshold, ODM is cheaper and faster, and the only thing you give up is design ownership.

Counter-Intuitive Point 1: ODM’s Real Cost Is the Certificate, Not the Unit

Under ODM, the factory designed the circuit, so the factory holds the CE / CB / UL certificate. You are permitted to sell under it — usually with your name added as an additional listing — but you do not own it.

Three consequences:

1. You cannot take it with you. Switch factories and you re-certify from scratch. On a 200 W driver that is 1,500–3,000 for CE/CB and 8,000–15,000 for UL, plus 4 weeks and 12 weeks respectively.
2. Your competitor may be on the same certificate. If the factory sells the same ODM platform to three brands in your market, you share a certificate and a BOM. Your “unique” product is not unique.
3. A design change by the factory can invalidate it. If they switch a capacitor supplier for cost reasons mid-year, the certificate technically needs re-filing. Ask whether you will be notified.

This is the most under-negotiated clause in B2B power supply purchasing. Put it in the contract: who holds the certificate, what happens on termination, and how much notice you get before a BOM change.

Counter-Intuitive Point 2: Certification Costs More Than Tooling

Buyers fixate on the 2,000–8,000 tooling figure and ignore certification entirely. On a genuinely new design:

For a North American launch, certification routinely exceeds tooling. And unlike tooling — which you could theoretically move to another factory — certification money is unrecoverable if you change suppliers.

What You Can Actually Customise Under ODM

More than most buyers assume, at MOQ 50 pcs:

• Output voltage and current — within the platform’s range (12 V / 24 V, and current limits within the transformer’s capability)
• Cable — length, gauge, connector type, colour
• Housing colour and finish — black, white, silver; custom colours usually at 500 pcs
• Silkscreen and label — your part number, your logo, your barcode
• Packaging — retail box, bulk carton, your artwork
• Certification scope — adding a market to the existing certificate

What you cannot change under ODM: the PCB layout, the topology, the transformer, and the housing shape. Those are OEM.

Decision Tree

One more branch worth naming: if your differentiation is software, packaging or service rather than hardware, ODM is almost always right. Paying for a unique housing to compete on a spec nobody reads is the most common way to burn a tooling budget.

Contract Clauses Checklist

Six things to get in writing before the first transfer:

1. Certificate holder and your rights to use it after termination
2. BOM change notification period (we give 30 days)
3. Tooling ownership — you paid for it, you should own it and be able to move it
4. Exclusivity — territory and duration, if you are paying for it
5. Defect liability — RMA window, who pays freight, replacement turnaround
6. End-of-life notice — minimum 12 months, so you can re-source

Our standard terms: MOQ 50 pcs, 15-day lead time, 3-year warranty, CE / FCC / RoHS. Tooling is yours and ships on request. See the OEM/ODM capability page for the full process.

Where to Go Next

• Before committing: How to Audit an LED Power Supply Factory in 48 Hours
• To compare suppliers on one sheet: OEM Power Supply Supplier Scorecard: 23 Checks
• For real cost and timeline numbers: China OEM Power Supply: MOQ, Tooling & Timeline Reality

Send us your annual volume and target spec — we will tell you honestly whether ODM or OEM is the right call, including when it is not us. → Start an ODM project