OpeningYour TO-220 transistor runs hot. We make the heatsink that fixes that. We machine or stamp your exact drawing, verify every critical dimension, and ship only after inspection. No guesswork, no
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OpeningYour TO-220 transistor runs hot. We make the heatsink that fixes that. We machine or stamp your exact drawing, verify every critical dimension, and ship only after inspection. No guesswork, no
Your TO-220 transistor runs hot. We make the heatsink that fixes that. We machine or stamp your exact drawing, verify every critical dimension, and ship only after inspection. No guesswork, no "close enough."
At a glance: Tolerance ±0.05 mm on CNC-machined features, standard lead time 7–12 days after drawing approval, no MOQ (order 10 or 10,000 pieces), material certs included with every batch.
We are a precision manufacturing factory in Dongguan, China, with 20 years on CNC machining, metal stamping, springs, and heat sinks. You send the drawing. We return a part that fits, cools, and passes your QC.
| Parameter | Value |
|---|---|
| Materials | Aluminum 6063-T5, 6061-T6, 1050A; copper C1100 (optional) |
| Manufacturing process | CNC machining (milling, drilling, tapping) or precision metal stamping |
| Tolerance | Machined: ±0.05 mm; stamped: ±0.1 mm; hole pitch ±0.03 mm |
| Surface finish | Clear anodize (8–12 µm), black anodize, or as-drawn (no finish) |
| Thermal resistance | 8–15 °C/W depending on geometry and airflow (calculated per your design) |
| Mounting | Through-hole (M3 screw), clip-on, or solderable tab per your drawing |
| Batch size | 1–100,000+; no MOQ |
| Inspection | 100% critical dimension check; CMM report per batch on request |
| Lead time | Prototype 5–7 days; production 7–12 days after approval |
| Packaging | Anti-static bags, partitioned cartons, export-grade palletizing |
All heat sinks are deburred and cleaned before anodizing. We do not cut corners on fin thickness or base flatness—your transistor needs full contact to transfer heat.
1. Batch-traceable quality. Every batch gets a unique lot number. We record material batch, machine parameters, and inspection results. If a problem shows up in your line, we trace it back to the exact hour and operator. You get a PDF report with each shipment—no chasing, no ambiguity.
2. Inspection report per batch. We measure base flatness, hole position, fin spacing, and surface finish on every batch—not just the first piece. You receive a dimensional report with actual values. For critical dimensions, we include CMM data. This is standard, not a paid extra.
3. One factory for CNC + stamping + springs + heatsink. Your assembly may need a stamped bracket, a spring clip, and a machined heatsink. We do all four in-house. One supplier, one shipping point, one quality standard. You save freight cost and avoid tolerance mismatches between different vendors.
TO-220 transistor heatsinks go into power electronics that dissipate 1–5 W continuously. Typical applications:
If your part runs hot and comes in a TO-220 package, we make the heatsink that keeps it below its rated junction temperature.
Looking for a different part? We also machine Custom Extruded Aluminum Heatsink Collection | Precision Manufacturing No MOQ in the same Dongguan factory.
Q: Do you really have no MOQ? A: Yes. We accept orders from 1 piece for prototypes up to 100,000 for production. Prototype pricing is higher per piece, but you pay only for what you need. No minimum quantity to start a relationship.
Q: How do you guarantee tolerance and quality? A: We use CNC machines with ±0.005 mm positioning accuracy. For stamped parts, we maintain die tolerances within ±0.05 mm. Every batch gets a dimensional inspection report. If a part is out of spec, we rework or remake it at our cost—no charge to you.
Q: What is your lead time for custom heat sinks? A: Prototypes: 5–7 days after drawing approval. Production: 7–12 days depending on quantity and surface finish. For urgent orders, we can split-ship—send the first 100 pieces in 5 days, then the rest weekly.
Q: Can you provide material certificates? A: Yes. Every batch includes a mill certificate for the aluminum or copper. We also provide RoHS and REACH compliance documents on request. Material traceability is part of our standard process, not an add-on.
Send us your TO-220 heatsink drawing—PDF, STEP, or IGES. We will review the geometry, suggest manufacturing improvements if needed, and return a firm quote within 12 hours (working days). No obligation, no design fee for standard review.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing, made in China, with no MOQ and verified quality. Your drawing is the starting point. We handle the rest.
| Parameter | Capability |
|---|---|
| Materials | AL6063/6061/5052, pure copper C1100, copper-aluminum composite |
| Process | Extrusion, CNC machining, skiving, forging, die casting, stamping fins |
| Fin Types | Extruded, pin fin, skived, folded, bonded, heat pipe, vapor chamber |
| Surface | Black anodizing, clear anodizing, nickel plating, powder coating |
| Size Range | Max 1500 x 400 x 300 mm |
| Thermal Test | Thermal resistance and heat dissipation data per batch |
| Prototype | 5-7 days, no MOQ on samples |
| Inspection | CMM, thermal resistance tester, full report per batch |
