TE Connectivity / Schrack SRL6 Low-Profile Force-Guided Relays

Introduction

The TE Connectivity / Schrack SRL6 is a compact, PCB-mount force-guided relay designed for safety-related switching and monitoring applications. Its low-profile package and guided-contact construction make it suitable for equipment that requires dependable status feedback while conserving board space.

Part Description

SRL6 relays use a force-guided contact arrangement compliant with EN 50205. This design mechanically links the relay contacts so that normally open and normally closed contact sets cannot incorrectly indicate opposite states during certain contact-fault conditions, such as welded contacts.

The relay provides:

• Four normally open (4 NO) contacts
• Two normally closed (2 NC) contacts
• Up to 6 A rated contact current
• Compact 10.8 mm low-profile PCB-mount construction
• Reinforced insulation between contact circuits
• Safety-oriented contact monitoring capability

With six contacts in a small footprint, the SRL6 can support both load switching and auxiliary feedback functions within the same relay package.

Applications

Potential applications for the SRL6 relay include:

• Safety relay modules
• Emergency-stop circuits
• Machine guarding systems
• Protective interlock monitoring
• Motor contactor monitoring
• Safety controller output interfaces
• Industrial control panels
• Process-control shutdown systems
• Power switching with feedback verification
• Compact PLC or I/O expansion modules

Industries

The SRL6 relay can be used in a range of industries, including:

• Industrial automation
• Manufacturing and assembly
• Robotics
• Packaging machinery
• Material handling and logistics
• Process automation
• Building automation
• Railway and transportation equipment
• Energy and power-control systems
• Medical and laboratory equipment
• Food and beverage processing

Usage Ideas

1. Emergency-Stop Monitoring Module
   Use the relay in a PCB-based emergency-stop module, with NO contacts switching control power and NC contacts providing feedback to verify relay operation.

2. Machine Guard Interlock Interface
   Build a safety interface for door or guard switches that disconnects machine control circuits when an enclosure is opened while reporting contact status to a controller.

3. Motor Contactor Feedback Board
   Create a compact monitoring board that controls a motor contactor and uses force-guided auxiliary contacts to detect potential switching faults.

Conclusion

The TE Connectivity / Schrack SRL6 low-profile force-guided relay is a practical option for compact safety-related PCB designs. Its 4 NO and 2 NC contact configuration, 6 A switching capability, reinforced insulation, and EN 50205 force-guided contact design support reliable switching and diagnostic feedback in industrial and control-system applications.