TE Connectivity SCHRACK RSY1-1A3 Power PCB Relay

Introduction

The TE Connectivity SCHRACK RSY1-1A3 is a general-purpose power PCB relay designed for switching electrical loads from a low-voltage control signal. Part of the RSY relay family, it combines PCB-mount convenience with a robust 10 A switching capability for a wide variety of compact control and power-switching designs.

Part Description

The RSY1-1A3 is a non-latching electromechanical relay with a 1 Form A contact arrangement, also known as SPST normally open. When the coil is energized, the relay closes its output contact to connect the switched circuit. When coil power is removed, the contact returns to its open state.

This relay is intended for solder-pin PCB mounting, allowing it to be assembled directly onto a circuit board without external relay sockets or panel hardware. The RSY series is available with coil voltage options ranging from 3 VDC to 60 VDC, supporting designs based on low-voltage logic supplies as well as higher-voltage control systems.

Key characteristics include:

• General-purpose power PCB relay
• 1 Form A / SPST normally open contact configuration
• Non-latching operation
• 10 A contact rating
• Through-hole solder-pin termination
• PCB-mount construction
• DC coil options from 3 VDC to 60 VDC
• Manufactured by TE Connectivity / SCHRACK

Applications

Potential applications for the RSY1-1A3 relay include:

• AC or DC load switching
• Appliance control boards
• Lighting controls
• Heating and ventilation equipment
• Small motor and pump control
• Solenoid and valve switching
• Power distribution switching
• Battery-powered control systems
• Smart home controllers
• Industrial interface boards
• Security and access-control equipment
• Test and measurement fixtures

Industries

This relay can be used in a range of industries, including:

• Industrial automation
• Building automation
• Consumer appliances
• HVAC and refrigeration
• Smart home and IoT systems
• Energy management
• Lighting and controls
• Security systems
• Telecommunications equipment
• Test and laboratory equipment
• Commercial equipment manufacturing

Usage Ideas

1. Microcontroller-Controlled Lighting Switch
   Use the relay with a transistor or relay-driver circuit to let a low-voltage microcontroller control a higher-power lamp or lighting circuit.

2. Thermostat-Activated Fan Controller
   Combine the relay with a temperature sensor and control circuit to switch a ventilation fan on when a selected temperature threshold is reached.

3. Automatic Water Pump Control
   Use a float switch or moisture sensor to control the relay coil, allowing the relay contacts to switch a small pump or solenoid valve.

Conclusion

The TE Connectivity SCHRACK RSY1-1A3 is a versatile PCB-mount power relay for applications requiring a normally open, non-latching switching output. Its 10 A contact rating, solder-pin mounting style, and available DC coil voltage range make it suitable for compact power-control circuits in industrial, commercial, appliance, and automation equipment.