Deutsch Autosport AS 128-Way Inline — Socket (Female) — Blue Key (B)
The Deutsch Autosport AS 128-Way Inline Socket (Female) Connector with Blue (B) Keying Insert — SKU: AS124-35SB is a professional MIL-spec-grade motorsport connector for the maximum-density full race car loom separable joins and complete vehicle harness interfaces in factory-level and professional motorsport applications in race cars and performance vehicles across Norway, Sweden, and Denmark. This socket half is the receptacle side — the gold-plated socket terminals receive the incoming pin contacts from the corresponding pin (pin) half, completing all 128 circuit connections when the connector is engaged and locked. Configured as an inline connector — in-line harness separable join — both halves are free, cable-mounted connectors within the wire run.
Deutsch Autosport AS — 128-circuit Inline Connector
The Deutsch AS series is the standard Autosport circular connector format for professional motorsport — providing the 128-circuit capacity required for this application in a robust aluminium alloy shell with push-pull positive locking, gold-plated contacts, and full MIL-spec environmental sealing for race-condition reliability. The largest circuit count configuration in the standard as inline series — used only for the most complex full vehicle harness separable joins in factory and professional motorsport builds where a single ultra-high-density connector is preferred over multiple smaller connectors. The 128-circuit AS inline is the largest circuit count connector in the AS series — reserved for factory-level race car loom builds and the most complex professional motorsport harness separation points where maximum circuit density in a single inline connector is required.
Blue Key (B) — The second keying position in the deutsch as system
As the second keying position in the Deutsch AS system, the Blue B key is assigned to the second 128-way AS connector pair in a harness after Yellow A has been allocated to the first. Blue B is the second key assignment in a harness where two or more AS connectors of the same circuit count are used. Once Yellow A is assigned to the first connector pair, Blue B is assigned to the second — ensuring these two physically identical connectors cannot be cross-mated during installation or servicing of the harness. This two-key system is the most common mis-mate prevention strategy on race car harness builds where two 128-way AS inline joins are required at the same loom separation point — for example, splitting a high-circuit-count ECU and PDM loom into two parallel 128-circuit bundles.
Contact Type — Socket (Female)
This listing is for the socket half of the 128-way AS inline pair — the receptacle contact half — the socket terminals receive and make contact with the incoming pin terminals when the connector is mated, completing the electrical circuit across the separable join. The corresponding pin half of the same circuit count and key colour is required to complete the mated connector pair. AS contacts are ordered separately — select the correct contact part number for your wire gauge and current requirements.
Technical Specifications
- Series: Deutsch Autosport AS
- Circuits: 128-way
- Configuration: Inline
- Contact type: Socket (Female)
- Key colour: Blue (Key B)
- Shell material: Aluminium alloy
- Operating temperature: -65°C to +175°C
- Locking: Push-pull positive lock
- Typical application: Second connector in a multi-connector harness — assigned after yellow a when two same-circuit-count as connectors are present
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