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Siemens overload relay in grey industrial housing with screw terminals

SIEMENS

SIEMENS 3UB88234DW2 Overload Relay 5.5 A 22 A

SKU CH-Z6B9-8VGN3

Protects motors with adjustable 5.5 A to 22 A trip settings and 1NO/1NC auxiliary contacts

  • TypeIndustrial Electrical Controls & Automation
  • Trip Class 5/10/20/30 adapts protection to motor needs
  • 5 A to 22 A range covers diverse applications
  • 690 V AC rating handles high-voltage industrial circuits
  • Auto and manual reset options simplify maintenance
  • Direct contactor mounting with screw terminals speeds installation

SIEMENS 3UB88234DW2 Overload Relay 5.5 A 22 A

This SIEMENS 3UB88234DW2 overload relay protects motors by monitoring current between 5.5 A and 22 A. It mounts directly to compatible contactors for integrated panel assembly. The unit suits industrial control circuits requiring adjustable thermal protection. Electrical contractors and maintenance teams specify it for Class 14 starter compatibility.

Trip Class 5 10 20 30 Adjustable Protection

Selectable trip classes 5, 10, 20 and 30 let installers match the relay response to motor starting characteristics. This flexibility reduces nuisance tripping on heavy inertial loads while maintaining fast reaction for standard applications. The 1NO/1NC auxiliary contacts provide status signalling to control systems. Auto and manual reset modes support both unattended and supervised recovery.

690 V AC Maximum Voltage Rating

The 690 V AC rating defines the highest system voltage this relay can safely monitor. Installations exceeding this level require a different protection device. Buyers working on higher-voltage distribution networks cannot use this part. The screw-terminal connections accept standard control wiring for straightforward integration.

Highlights

  • Trip Class 5/10/20/30 adapts protection to motor needs
  • 5 A to 22 A range covers diverse applications
  • 690 V AC rating handles high-voltage industrial circuits
  • Auto and manual reset options simplify maintenance
  • Direct contactor mounting with screw terminals speeds installation

Specifications

BrandSIEMENS
TypeIndustrial Electrical Controls & Automation

Questions about this item

Does the 5.5 A to 22 A thermal unit need periodic replacement?

The relay uses fixed thermal elements matched to the 5.5 A minimum and 22 A maximum settings; no separate thermal units are required or replaced.

Will the 690 V AC screw terminals overheat during continuous 22 A operation?

Trip classes 10, 20 and 30 protect the contactor from sustained overload; the screw terminals are rated for the full 690 V AC at the 22 A maximum setting.

How much heat does the relay generate when mounted directly on a Class 14 starter all day?

Direct contactor mounting dissipates heat through the starter body; the relay operates within its 5.5 A to 22 A range without additional cooling.

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