Overview
The Crydom CSE2425 is a photo-coupled solid state relay (photorelay) designed for AC load switching in industrial automation and control systems. This SPST-NO (single-pole, single-throw, normally open) relay features a hockey-puck form factor and supports load voltages from 24 to 280V RMS at up to 25A. The CSE2425 has been discontinued but remains in use across legacy industrial applications where replacement with compatible modern units is necessary.
Key Features
- Photo-coupled design eliminates galvanic isolation requirements
- 25A maximum load current rating for heavy-duty switching
- Zero-cross switching reduces EMI and electrical noise
- Wide input control voltage range (15–32V DC)
- 600V peak transient overvoltage protection
- SPST-NO contact configuration for simple on/off control
- 10^9 Ohms minimum insulation resistance @ 500 VDC
Technical Specifications
- Load Voltage Range: 24–280V RMS
- Maximum Load Current: 25A RMS
- Minimum Load Current: 0.15A
- Control Voltage: 15–32V DC
- Transient Overvoltage Rating: 600V peak
- Output Type: SCR (silicon-controlled rectifier)
- Switching Function: Zero-cross
- Contact Configuration: SPST-NO (Form A)
- Off-State Leakage Current: 1 mA RMS typical
- Insulation Resistance: 10^9 Ohms @ 500 VDC
- Package: Hockey puck form factor
- Weight: 3.0 oz
Typical Applications
The CSE2425 is suitable for:
- Industrial heater and heating element control
- Lighting load switching in panels and enclosures
- Motor contactor replacement and auxiliary switching
- HVAC and fan motor control circuits
- Power distribution and circuit protection systems
- Legacy automation systems requiring photo-coupled isolation
Compatibility & Replacements
Compatible With
- Industrial PLC and control systems with 15–32V DC control output
- Legacy automation panels using photo-coupled SSRs
- AC load circuits rated 24–280V RMS
- Thermal and timing control applications
- Standard 35mm DIN rail mounting systems (with appropriate carrier)
Replaces / Drop-In Replacement For
- Direct Replacement: Sensata-Crydom D2425
- Legacy Crydom photo-coupled 25A solid state relays
- Custom integrations using hockey-puck SSR form factors
Works With
- AC load switching (24–280V RMS circuits)
- DC control input sources (15–32V DC)
- Zero-cross switching compatible controllers
- Industrial control panels and enclosure systems
- Legacy photo-coupled relay applications
