The Allen-Bradley 700-HB33A1, also cataloged as the 700-HB33A1 General Purpose Relay, operates as a dedicated hardware component for interposing isolation and load switching within industrial panel control circuits. The module utilizes a 120 VAC control coil to actuate three independent power contacts, converting low-voltage logic signals into 15 A 3PDT electrical execution.
Hardware Specifications
Parameter
Specification
Model
700-HB33A1
Brand
Allen-Bradley
Series
Bulletin 700-HB
Category
Relays & Sockets / General Purpose Relays
Origin
USA
Weight
0.20 lbs (0.09 kg)
Dimensions
Square Base Plug-In Relay Form Factor
Operating Temp
-20 to 65 deg C
Power Consumption
120 VAC (50/60 Hz Coil)
Amperage Rating
15 A
Contact Configuration
3PDT (3 Pole Double Throw)
Terminal Type
Square Base Blade-Style
Status Indication
Visual Mechanical ON/OFF Indicator & LED
I/O Density Scaling & Deterministic Control Execution
Designed for plug-in installation into panel socket bases, the 700-HB33A1 supports high-density cabinet layouts and I/O density scaling across Allen-Bradley Logix and SLC systems. The 3PDT contact architecture enables simultaneous switching of multiple isolated control loops from a single coil trigger. Its high coil sensitivity and mechanical response times maintain deterministic relay execution when interfacing PLC digital output cards with high-current field actuators or alarm annunciation panels.
Frequently Asked Questions
Q: Does the integrated LED indicator draw power directly from the 120 VAC coil control circuit?
A: Yes, the internal LED status light connects in parallel across the 120 VAC coil terminals, illuminating automatically whenever control power is applied to indicate active coil energization.
Q: Can the 700-HB33A1 relay be plugged into a standard Bulletin 700 square base socket under load?
A: No, while the blade-style square base allows rapid physical replacement, power to the socket base must be de-energized prior to inserting or removing the relay to prevent arcing across the terminal pins.
Field Installation Guidelines
Insert the square base blade terminals into a compatible Bulletin 700 relay socket, applying firm pressure until the relay sits fully flush against the socket body.
Secure the relay retaining clip over the housing to ensure mechanical stability under high-vibration panel conditions.
Wire control inputs to the 120 VAC coil terminals using stranded copper conductors, maintaining clear separation from high-current output load wiring.
Verify that field load currents on each 3PDT contact set do not exceed the 15 A resistive continuous rating.
Ground the socket DIN rail mounting clip directly to the main panel ground plane to satisfy electrical safety bonding requirements.
