SCHRACK RSY Relays

Introduction

TE Connectivity / Potter & Brumfield SCHRACK RSY relays are electromechanical relays designed for high contact reliability in applications exposed to demanding thermal and electrical conditions. The series combines an extended operating temperature range of -40°C to 105°C with electrical endurance specified at more than one million cycles, making it relevant where relay performance must remain dependable over repeated switching operations.

A notable integration feature is support for through-hole reflow soldering, including versions with a 15 mm height. The product family is also described as having an approximately 15% lower product carbon footprint.

What it does

SCHRACK RSY relays provide electrically controlled mechanical switching for loads in control and power-interface circuits. Their specified minimum contact load of 5 V / 1 mA supports low-level switching requirements, while current capability of more than 5 A at 105°C addresses switching in elevated-temperature environments.

The relay family is intended to maintain contact performance through more than one million switching cycles. Its -40°C to 105°C thermal range is suited to equipment that may see cold starts, enclosed-control-panel heat, or elevated ambient temperatures.

For refrigerant-related equipment, the series is described as compliant with UL 60335-2-40 A2L hazardous-location requirements. The supplied product information also references requirements associated with A3 refrigerant applications.

Applications

Potential uses that follow from the stated capabilities include:

• HVAC control boards and climate-management equipment
• Automation and industrial control systems
• Motion and drive control equipment
• New-energy equipment requiring relay-based switching
• Refrigerant-related systems using A2L- or A3-related design requirements
• Through-hole reflow-assembled control electronics

Design considerations

The SCHRACK RSY family uses through-hole mounting and supports through-hole reflow soldering. Board layout and assembly processes should therefore accommodate the relay’s through-hole footprint and the stated 15 mm solderability height.

Electrical design should consider both ends of the stated contact-load range: a minimum load of 5 V / 1 mA for low-level signals and current capability above 5 A at 105°C. Designers should also evaluate the complete switching conditions of the intended load, including operating temperature, as the available data specifically highlights performance at 105°C.

For HVAC or climate equipment involving newer refrigerant classifications, the stated UL 60335-2-40 A2L hazardous-location compliance may be a relevant system-level consideration. Applicability should be verified against the requirements of the final equipment design.

Availability and further information

The source and distributor link on this page provides further information on the SCHRACK RSY relay family. Consult the linked datasheet resources, where available, for detailed ordering options, contact arrangements, coil characteristics, dimensions, and application-specific qualification information.