A-B 700-HA33Z1-3 General Purpose Relay

Allen-Bradley 700-HA33Z1-3 General Purpose Plug-In Relay (3PDT, 110V DC Coil)

 

 

Product Description

The Allen-Bradley 700-HA33Z1-3 is a general purpose plug-in tube base relay used in industrial control circuits for switching, isolation, and logic control functions. It belongs to the 700-HA series (octal/11-pin socket type relays) and is widely used in machine control panels and automation systems.

Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 700-HA33Z1-3
• Series: 700-HA Tube Base Relay
• Type: Plug-in general purpose relay
• Coil Voltage: 110 V DC
• Contact Configuration: 3PDT (3 Pole Double Throw)
• Rated Current: 10 A
• Mounting: Plug-in with 8/11-pin socket base
• Function: General switching / control relay

What it actually does

This relay is used to:

• Switch electrical signals in control panels
• Provide electrical isolation between control and load circuits
• Act as intermediate logic in relay-based automation
• Control contactors, solenoids, alarms, and small loads

System Role (Simple)

PLC output / control signal
→ 700-HA33Z1-3 relay coil energizes
→ internal contacts switch
→ field device (motor starter / valve / alarm)

Key Features

• Plug-in design (easy replacement)
• 3PDT contact structure (multi-circuit switching)
• Industrial 10A switching capacity
• Clear cover for visual inspection
• Optional push-to-test / manual override function
• LED indicator available depending configuration
• Designed for harsh industrial environments

Typical Applications

• Machine control panels
• Industrial automation systems
• Motor control logic circuits
• Signal isolation between PLC and field devices
• Conveyor and production line systems
• HVAC and pump control panels

Advantages

• Easy plug-in maintenance (no rewiring relay replacement)
• Reliable mechanical switching performance
• Flexible multi-contact output (3PDT)
• Strong compatibility with control cabinets
• Widely used Rockwell standard relay system

Important Notes

• Not PLC CPU ❌
• Not I/O module ❌
• Not power supply ❌
• Not sensor ❌
• It is a general purpose control relay ✔

Precautions

• Must use correct 700-HA socket base (8/11-pin matching)
• Coil voltage must match system (110V DC in this model)
• Contacts are mechanical → limited switching life
• Inductive loads require suppression (diode/snubbers)
• Incorrect socket wiring can cause malfunction