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ST740673-3 / 8100-0457 / 8100-0458 Sumitomo 2.2mm Male Crimp Terminal — Automotive Wire Connector Splice Pin
ST740673-3 / 8100-0457 / 8100-0458 Sumitomo 2.2mm Male Crimp Terminal Automotive Wire Connector Splice Pin
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ST740673-3 / 8100-0457 / 8100-0458 Sumitomo 2.2mm Male Crimp Terminal — Automotive Wire Connector Splice Pin
The ST740673-3 (also cross-referenced as 8100-0457 and 8100-0458) is a Sumitomo Electric 2.2mm male crimp terminal splice pin for automotive wire connector housings. Sumitomo Electric is the world’s largest automotive wiring harness manufacturer, supplying OEM harnesses to Toyota, Honda, Nissan, Mazda, Subaru, and many other vehicle brands. The 2.2mm terminal series is used in Sumitomo connector systems for sensor, actuator, and signal circuits across a wide range of Japanese and international vehicle platforms.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | ST740673-3 / 8100-0457 / 8100-0458 |
| Manufacturer | Sumitomo Electric |
| Terminal Pitch | 2.2mm |
| Terminal Type | Male crimp splice pin (open-barrel) |
| Material | Tin-plated metal |
| Compatible Connectors | Sumitomo 2.2mm series housings |
| Wire Range | 0.3–0.85mm² (22–18 AWG) |
| Current Rating | Up to 5A |
| Operating Temperature | -40°C to +125°C |
| Compliance | RoHS |
| Origin | Mainland China |
Sumitomo 2.2mm Terminal System
- Sumitomo OEM standard — the 2.2mm terminal series is used in Sumitomo-supplied harnesses across Toyota, Honda, Nissan, Mazda, and Subaru platforms for sensor and signal circuits
- Multiple cross-references — ST740673-3, 8100-0457, and 8100-0458 are the same terminal referenced under different Sumitomo catalog systems; all three numbers identify the same component
- Male splice pin — inserts into the female housing cavity; mates with the corresponding female terminal (socket) in the counterpart connector
- Tin-plated contact surface — corrosion-resistant plating maintains low contact resistance over the connector’s service life in underhood environments
Typical Applications
- Sumitomo 2.2mm connector terminal replacement on Toyota / Honda / Nissan vehicles
- Sensor and ECU connector wiring harness repair
- Signal circuit connector terminal replacement
- Workshop terminal stock for Japanese vehicle maintenance
- Custom wiring harness fabrication with Sumitomo housings
Frequently Asked Questions
Q: What is the difference between 8100-0457 and 8100-0458?
The 8100-0457 and 8100-0458 are minor variants within the same Sumitomo terminal family — typically differing in wire barrel dimensions to accommodate slightly different wire gauge ranges. Both are cross-referenced to ST740673-3. If you are unsure which variant to use, measure your wire gauge and select the terminal with the wire barrel sized for your wire — a properly sized barrel produces a gas-tight crimp that withstands the required pull-out force.
Q: How do I find the correct Sumitomo terminal for my vehicle?
The most reliable method is to look up the connector housing part number (stamped on the housing or found in the vehicle’s wiring diagram) in the Sumitomo connector catalog. The catalog lists the compatible terminal part number for each housing. Alternatively, measure the terminal pitch in the housing cavity — a 2.2mm pitch is noticeably smaller than the common 2.8mm series.
Q: Can I use a Sumitomo terminal in a non-Sumitomo housing?
Not reliably. Terminal dimensions, locking tab geometry, and cavity sizing vary between connector manufacturers. A Sumitomo terminal in a non-Sumitomo housing may not lock properly, creating a loose connection that fails under vibration. Always match the terminal to the housing manufacturer and series for a reliable, pull-out-resistant connection.
