OpeningYour EV high voltage contactor design deserves parts that hold up at 800V DC and 250A continuous. We make them to your drawing, not from a catalog. Every stamped component i
EV High Voltage Contactor Parts | Precision Metal Stamping No MOQ
OpeningYour EV high voltage contactor design deserves parts that hold up at 800V DC and 250A continuous. We make them to your drawing, not from a catalog. Every stamped component is verified for flatn
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Send us your drawing / quantity / material — reply within 24h.
Your EV high voltage contactor design deserves parts that hold up at 800V DC and 250A continuous. We make them to your drawing, not from a catalog. Every stamped component is verified for flatness, burr height, and plating thickness before shipment.
Tolerance: ±0.02 mm on critical features
Lead time: 10-15 working days after drawing approval
No MOQ: order 50 pieces or 500,000
Material thickness: 0.1 mm to 3.0 mm
100% dimension check on first article, AQL 1.0 on production lots
This is precision manufacturing for the EV powertrain. If your drawing is tight, we hold it. If it is loose, we tell you where we can save cost.
Progressive die stamping, compound stamping, fine blanking
Machine capacity
25 – 200 ton presses, up to 600 strokes/min
Tolerance
±0.02 mm (machined features), ±0.05 mm (formed features)
Surface finish
Matte tin plating, silver plating, nickel plating, or as-drawn
Burr height
≤ 0.05 mm, deburred on request
Flatness
≤ 0.1 mm over 50 mm length for contact plates
Batch size
50 – 5,000,000 pieces
Inspection
CMM, optical comparator, 2.5D vision system, salt spray test
Certifications
IATF 16949, ISO 9001, RoHS, REACH
All custom metal stamping is done in our 12,000 m² factory in Dongguan. We run 24/5 with in-house toolroom. No outsourcing for core stamping steps.
Three reasons buyers send us their drawings
1. Batch-traceable quality. Each lot gets a unique heat number and production date. We keep samples from every batch for 24 months. If a field failure occurs, we can trace it to the exact coil of material and press stroke.
2. Inspection report per batch. You get a full dimensional report with CMM data, surface finish readings, and plating thickness measurements. No generic "certificate of conformance." We show you the numbers.
3. One factory for CNC + stamping + spring + heatsink. Your contactor has a stamped bridge, a CNC-machined pole piece, a compression spring, and a heatsink base. We make all four in-house. That means one purchase order, one quality system, and no tolerance stack-up arguments between suppliers.
Where these parts are used
EV high voltage contactors are not simple relays. They switch DC loads that can arc violently. Our stamped parts go into:
Main contactors – copper bridge contacts and terminal plates carrying 200-500A continuous current.
Pre-charge contactors – small stamped resistors and contact springs that limit inrush current.
Fast-charging contactors – heavy copper busbars with welded studs for 350 kW DC chargers.
Battery disconnect units (BDU) – stamped shunt plates and isolation barriers inside the battery pack.
Solar and storage inverters – similar DC switching requirements, same stamped contact geometry.
The common thread: high current, high vibration, and a need for consistent contact resistance. Our stamping process holds the contact surface flat and clean, which keeps resistance low over 100,000 cycles.
Q: Is there really no MOQ?
A: Yes, no MOQ. We keep common copper and brass strips in stock. For a prototype run of 50 pieces, we use a simple die and charge only for machine time and material. For high volume, we build a progressive die and amortize the tooling cost into the piece price.
Q: How do you control tolerance and quality?
A: First article is measured on a CMM with a full report. Production lots are checked every 2 hours with a 2.5D vision system. Critical dimensions like contact gap and flatness are checked 100% on a dedicated fixture. We follow IATF 16949 procedures, including PPAP if you need it.
Q: What is your lead time for stamped parts?
A: Prototype (no tooling) – 5-7 working days. Production with new progressive die – 15-20 working days for tooling, then 10-15 days for the first batch. Repeat orders ship in 10 days. We can rush prototype samples in 72 hours at extra cost.
Q: Can you provide material certificates?
A: Yes. Every coil of material comes with a mill certificate showing chemical composition and mechanical properties. We also provide RoHS and REACH declarations. Plating thickness reports are included with each batch.
Send your drawing
Email your PDF or STEP file to sc@bquq.com. Our engineers review it within 4 working hours. You get a firm quote in 12 hours – price, tooling cost, lead time, and a DFM note on any risky features.
Prefer chat? WhatsApp +86 13713157787 with photos of your drawing. We will confirm the key dimensions and send a quote the same day.
No MOQ, no runaround, no hidden tooling fees. This is custom metal stamping made in China with 20 years of EV experience. Send the drawing. We will make it right.
