OEM Custom AgSnO2 Contacts for EV Charging Relays 2026 – Chende Factory

January 28, 2026
7:29 am

OEM Custom AgSnO2 Contact for EV Charging Relays 2026 – Chende Factory

OEM Custom AgSnO2 Contacts for EV Charging Relays 2026 – Chende Factory

OEM Custom AgSnO2 Contacts for EV Charging Relays 2026
Chende Factory – Materials, Performance & Selection

January 2026 | 48 min read | Chende Electrical Contact R&D Center

Why OEM Custom AgSnO2 Contacts Are Essential for EV Charging Relays in 2026

EV charging relays are the heart of fast charging stations, handling high DC currents (100–500A) and voltages (400–1000V). In 2026, with global EV adoption exploding and charging speeds pushing to 350kW+, relays face intense arcing, welding, and heat. Off-the-shelf contacts can't meet the exact specs for these systems, so **OEM custom AgSnO2 contacts** are the way to go: silver tin oxide (AgSnO2) provides superior arc resistance and anti-welding, customized to your relay's design.

At Chende, 50% of our EV orders are OEM custom AgSnO2 contacts. We customize alloy doping, head shape, size, and plating, with low MOQ (10K pieces) and fast prototype (3–5 days). This guide covers materials, performance, selection, real cases, and 2026 trends for OEM custom AgSnO2 contacts in EV charging relays – all from our factory experience. For the full custom process, see our main guide Custom Silver Electrical Contacts According to Drawings 2026.

OEM custom AgSnO2 contacts in EV charging relay application 2026

OEM Custom AgSnO2 Contacts Materials: Doping & Performance

For EV charging relays, we customize AgSnO2 with tin oxide content 8–15% and doping (In₂O₃ or Bi₂O₃). Here's a comparison from our 2025–2026 tests:

Doping Type	Tin Oxide Content	Conductivity (% IACS)	Arc Erosion (mg/10K cycles)	Anti-Welding Force (N)	Life Cycles (200A DC)	Best For
In₂O₃ Doped	12%	75–80	0.3–0.4	140–200	200K–1M	High inductive EV relays
Bi₂O₃ Doped	10%	78–82	0.35–0.45	120–180	150K–800K	Cost-sensitive applications
No Doping	8%	80–85	0.4–0.5	100–150	100K–500K	Basic DC loads

In₂O₃ doped AgSnO2 (12%) is our top recommendation for EV charging relays, reducing temperature rise by 15–20%. We customize doping levels based on your drawings. For material comparison, see Bimetal Rivets Materials Comparison 2026.

OEM custom AgSnO2 contacts performance comparison 2026

Performance of Custom AgSnO2 Contacts in EV Charging Relays

Custom AgSnO2 contacts achieve:

Arc erosion resistance: 0.3–0.4 mg/10K cycles
Anti-welding force: 140–200 N
Contact resistance: 4–6 mΩ
Current withstand: 200–500A DC
Life cycles: 200K–1M operations

Chende customizes AgSnO2/Cu with nano-tin oxide for uniformity. For EV performance, see Bimetal Rivets in High Voltage Applications 2026.

Real Case: OEM Custom AgSnO2 Contacts for 350kW EV Charging Relay

A US EV charging company sent drawings for a 350kW relay contact. They needed high anti-welding and RoHS compliance. We customized AgSnO2(12) + In₂O₃/Cu contacts with custom head shape. Key results:

Anti-welding force reached 180 N
Life cycles exceeded 500K in 1000V DC tests
Temperature rise 18% lower under 500A load
Cost reduced by 30% vs solid silver

They approved the prototype in 4 days and ordered 800K pieces/year. This shows why OEM custom AgSnO2 contacts are essential for EV charging. For more cases, see Silver Contact Applications Guide.

OEM custom AgSnO2 contacts for 350kW EV charging relay case study 2026

2026 Trends: OEM Custom AgSnO2 Contacts for EV Charging Relays

By 2026, OEM custom AgSnO2 contacts will see:

Nano-doping for 20% better arc resistance
Tri-metal designs for corrosion in outdoor chargers
IoT integration for predictive maintenance
Low MOQ (5K) for startup EV companies

Chende is piloting nano-doped AgSnO2/Cu for 500kW+ chargers. For trends, see Silver Contact Industry Trends 2025–2030.

Chende OEM Custom AgSnO2 Contacts: Low MOQ & Fast Delivery

MOQ 10K, prototype in 3–5 days, mass production in 7–14 days. We accept small orders for testing. For OEM custom AgSnO2 contacts, see The 5 Most Recommended Silver Alloy Contacts for 2025.

Frequently Asked Questions About OEM Custom AgSnO2 Contacts for EV Charging Relays

What is OEM custom AgSnO2 contacts?

OEM custom AgSnO2 contacts are silver tin oxide contacts tailored to your EV relay drawings, with custom doping, shape, and size for high performance.

What is the minimum order quantity for custom AgSnO2 contacts?

Our low MOQ is 10K pieces for mass production, with prototypes (10–50 pieces) available for testing.

How long does it take to get custom AgSnO2 contacts prototype?

Prototype in 3–5 days after drawing confirmation. Mass production in 7–14 days after approval.

Why use AgSnO2 for EV charging relays?

AgSnO2 offers superior arc erosion resistance (0.3–0.4 mg/10K cycles) and anti-welding force (140–200 N), ideal for high DC loads in EV charging.

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