IDEC Relays RR3B-ULAC120V Relay

The IDEC RR3B-ULAC120V is a heavy-duty general-purpose power relay engineered for rigorous industrial automation and HVACR sequences. This RR Series relay features a 3PDT (3-pole double-throw) contact configuration and is a verified direct replacement for KUP-14A35-120 and KUP14A35-120 models. Designed with high-conductivity silver alloy contacts, it manages a 10 Amp contact rating and is built to handle both resistive and inductive loads. The 120VAC coil operates efficiently at 20.5 mA to 24 mA, providing reliable switching for motors and control circuits. For streamlined field diagnostics, it includes a built-in visual indicator for real-time status verification. The blade terminals (QC tabs) facilitate secure wiring, while the versatile socket mount design supports DIN rail, surface, or panel mounting configurations. With horsepower ratings of 1/4 HP at 120V and 1/3 HP at 240V, this relay is a standard for contractors requiring dependable circuit protection and motor control.

Key Benefits for Technicians

• Universal Compatibility: Serves as a drop-in replacement for KUP-14A35-120, minimizing downtime during field repairs.
• Enhanced Diagnostics: Integrated LED/mechanical indicator allows for immediate visual confirmation of coil energization without a multimeter.
• Rugged Contact Design: Silver alloy contacts resist pitting and welding, ensuring consistent performance across high-cycle industrial applications.
• High Heat Tolerance: Operational temperature range from -22°F to +158°F (-30°C to +70°C) makes it ideal for mechanical rooms and control cabinets.
• Multi-Mount Flexibility: Compatible with standard IDEC sockets for rapid integration into existing DIN rail or panel-mount layouts.

Common Questions

What is the difference between the RR3B-ULAC120V and the standard RR3B version?
The "UL" designation in this model indicates the inclusion of an indicator light and/or a check button, providing essential visual feedback for troubleshooting that basic models lack.

Can this relay be used for motor loads in HVAC systems?
Yes, it is rated for 1/4 HP at 120VAC and 1/3 HP at 240VAC, making it suitable for fan motors, small pumps, and heater sequencers.

Which mounting socket is required for this 3PDT relay?
This relay typically utilizes the SR3P-05 or SR3P-06 series sockets for DIN rail or surface mounting, ensuring secure retention of the 11-blade terminal configuration.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.