Description
The S1 S90 341 is a 110/120 V DPDT (Double Pole, Double Throw) relay switch made by York. It is used as a control relay in HVAC units, furnaces, and related equipment to switch higher power circuits (like motors, fans, blowers, or pumps) when triggered by control signals. As an OEM replacement relay, S1 S90 341 ensures reliable operation, correct voltage matching, and safe switching — making it suitable for replacing a worn or failed relay in compatible York systems.
Key Features
- Type: 110/120 V DPDT Relay Switch — double pole, double throw configuration.
- Coil Voltage: 110/120 V AC, 50/60 Hz.
- Function: Switches power circuits on/off in response to control signals — used for motors, fans, blowers, or other loads requiring line voltage switching.
- Form Factor: Compact relay package — about 2.55 in × 2.25 in × 2.1 in.
- Application: Suitable for use in furnaces, air handlers, or air conditioning systems where a DPDT 115 V relay is required; often used to control fan motors or blower circuits.







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