Overview
The IDEC RH2B-UL is a compact midget relay designed for industrial and commercial automation. This DPDT (Double Pole Double Throw) configuration delivers 10A switching capacity at 24VDC coil voltage. The relay features a built-in indicator light and mounts directly into an SH2B-05C socket base using blade terminals, providing reliable switching performance in control panels, machine control circuits, and energy management systems.
Key Features
- 10A continuous switching capacity across all contact sets
- DPDT configuration with integral indicator light for coil status verification
- Blade terminal design for secure socket mounting (SH2B-05, SH2B-05C compatible)
- Compact midget profile reduces panel space requirements
- UL recognized and CSA certified for North American installations
- Fast operate/release time—20 milliseconds maximum for DPDT models
Technical Specifications
The RH2B-UL meets stringent industrial standards. Contact resistance measures 50 MΩ maximum (initial), with 100 MΩ minimum insulation resistance at 500 VDC. For DC coil designs, power consumption is 0.9 W typical, minimizing thermal load. Operating temperature range spans −30°C to +70°C, accommodating diverse installation environments. Standard certifications include UL 508 recognition (File Nos. E55996, E66043) and CSA C22.2 No.14 compliance (File No. LR35144).
Typical Applications
- Industrial machine control and automation circuits
- Motor starter circuits and contactor logic
- Process control panel switching
- Energy management and demand control systems
- Equipment interlocking and safety circuit applications
- Pneumatic and hydraulic system control logic
Compatibility & Replacements
Compatible With
- SH2B-05 and SH2B-05C socket bases (standard and finger-safe DIN rail mount)
- DIN rail and surface-mount installation systems
- Panel-mount configurations with appropriate socket adapters
- AC and DC coil control circuits rated 24VDC nominal
- Blade-terminal relay sockets and terminal blocks
Replaces / Drop-In Replacement For
The IDEC RH2B-UL 24VDC variant directly replaces earlier RH2B-UL models with identical DC24V specifications. Verify coil voltage and socket base compatibility with your existing installation before substitution. Related IDEC RH Series models (RH1B, RH3B, RH4B) use the same socket family but differ in contact configuration and may require circuit validation.
Works With
- IDEC RH Series plug-in relay sockets (standard DIN, finger-safe DIN, surface mount, panel mount)
- IDEC SY-series auxiliary relay modules for extended logic functions
- Standard 24VDC control power supplies and PLC output modules
- Industrial control software platforms monitoring coil status via indicator light feedback
- Mechanical interlocking devices and electromechanical safety systems
