Overview
The IDEC RH3B-UDC24V is a general-purpose compact power relay designed for industrial control applications. This RH-series power relay has a DC coil with 3PDT AgCdO contacts. It features blade terminal with solder/plug-in type mounting and compact size saves space. The relay is suitable for instrumentation and control panel integration where reliable switching at moderate currents is required.
Key Features
- 10 amp switching capacity and UL recognized, CSA certified, CE marked
- 3PDT (3 Pole Double Throw) contact configuration for flexible switching logic
- AgCdO contact material with indicator
- Compact midget size saves space; plug-in styles can be mounted using either panel mount or DIN rail mount sockets
- Blade terminal design for fast socket mounting and easy replacement
- DC24V coil compatible with standard industrial power supplies
Technical Specifications
Operating temperature range of -30°C to +70°C, making it suitable for most indoor industrial environments. Contact resistance: 50 MΩ max (initial value). Operate time and release time for 3PDT configuration: 25 msec max. Insulation resistance: 100 MΩ min (measured at 500 VDC megger). Power consumption for 3PDT with DC coil: 1.5 W.
Typical Applications
- Machine tool control and motor switching circuits
- HVAC system controls and interlocks
- Instrumentation relay logic and signal routing
- Industrial lighting and load switching
- Process automation and control panel integration
- Alarm and annunciator circuits
Compatibility & Replacements
Compatible With
- Standard 24VDC industrial power supplies
- DIN rail mount relay sockets (plug-in type)
- Panel mount relay sockets
- PCB-mounted solder relay bases
- Control relay logic circuits requiring 3PDT switching
Replaces / Drop-In Replacement For
- RH3B-U DC24V (pin-compatible variant)
- IDEC RH3B series relays with equivalent contact ratings
- General-purpose 3PDT relays with similar form factor and 24VDC coil
Works With
- Plug-in relay sockets designed for RH series relays
- Standard 24VDC control circuits
- Panel wiring and DIN rail mounting systems
- Industrial PLC discrete output modules (via appropriate interface boards)
- Hardwired relay logic and mechanical interlock systems
