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Siemens 3RB31334UB0 - Overload Relay 12.5-50A (690VAC)

Siemens
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Siemens 3RB31334UB0 is an electronic overload relay designed for comprehensive motor protection within industrial control systems. This device provides adjustable current protection from 12.5 to 50 amperes across three poles, with a voltage rating up to 690 VAC, and features inverse time delayed protection with trip unit classes ranging from 5E to 30E. Constructed with screw mounting for both main and auxiliary circuits, it fits a Size S2 contactor frame and includes a switch position indicator and TEST function, weighing 0.496 lb with dimensions of 99 mm H x 55 mm W x 104 mm D. The relay complies with RoHS, WEEE, and REACH regulations, utilizing reusable materials for environmental conformity. It is typically applied in industrial motor control centers and machinery requiring overload, phase failure, and unbalance protection with manual and automatic reset options.

Key Features & Specifications
  • Type: Overload relay
  • Amperage rating: 12.5 to 50 A
  • Voltage rating: up to 690 VAC
  • Number of poles: 3
  • Mounting type: Screw for main and auxiliary circuits
  • Trip unit class: 5E to 30E
  • Contact form: 1NC-1NO auxiliary contacts
  • Internal power supply
  • Manual and automatic reset
  • Overload, phase failure, and unbalance protection
  • Switch position indicator and TEST function
  • Environmental compliance with reusable materials
  • Family: 3RB3
  • Country of Origin: Czechia
  • Dimensions: 99 mm H x 55 mm W x 104 mm D
  • Weight: 0.496 lb
  • Certification: Lead CAS-No. 7439-92-1 Greater Than 0, 1 % (w/w), REACH Art 33 Duty to Inform According to the Current List of Candidates, RoHS 07/01/2006, WEEE (2012/19/EU) Take-Back Obligation


Product Identification
  • UPC: 887621914707