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Eaton ZB12-4 Thermal Overload Relay, 2.5 - 4 A, 3-Pole, Class 10A, Screw Terminals 278438

Eaton ZB12-4 Thermal Overload Relay, 2.5 - 4 A, 3-Pole, Class 10A, Screw Terminals 278438
Eaton ZB12-4 Thermal Overload Relay, 2.5 - 4 A, 3-Pole, Class 10A, Screw Terminals 278438
R1,335
Industrial electricians and panel builders use the Eaton ZB12-4 thermal overload relay to protect three-phase motors from overheating due to overload or phase failure. It mounts directly onto Eaton DILM7 to DILM15 contactors, forming a compact motor starter in control cabinets.Key specificationsCurr... Read More
Stock 71 Code 3511686 Brand EATON Model 278438 Warranty 2 Years

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Industrial electricians and panel builders use the Eaton ZB12-4 thermal overload relay to protect three-phase motors from overheating due to overload or phase failure. It mounts directly onto Eaton DILM7 to DILM15 contactors, forming a compact motor starter in control cabinets.

Key specifications

  • Current setting range: 2.5 - 4 A
  • Number of poles: 3-pole
  • Trip class: Class 10A
  • Rated operational voltage: 690 V AC
  • Auxiliary contacts: 1 NO + 1 NC
  • Reset function: Manual/automatic
  • Mounting: Direct to contactor
  • Connection: Screw terminals
  • Ambient operating temperature: -25 - 55 °C
  • Phase failure sensitivity: Yes

Why choose it

The ZB12-4 provides reliable motor protection with a wide current adjustment range and phase failure detection. Its direct mounting saves wiring time and space, while manual/automatic reset offers flexibility for different applications.

Ideal use cases

  • Motor protection in industrial control panels
  • HVAC compressor and pump protection
  • Conveyor and material handling systems
  • Machine tools and packaging machinery

Good to know

The relay complies with IEC/EN 60947-4-1, VDE 0660, UL, and CSA standards. It has an IP20 degree of protection at the terminals and weighs 142 g. Storage temperature range is -40 to 80 °C.

Specifications
AC input voltage
690 V AC
Brand
Eaton
Category
Thermal Overload Relay
DIN rail mounting
No
EAN
4015082784386
LED indicators
No
Maximum current
2.5 - 4 A
Model
ZB12-4
MPN
278438
Operating temperature (T-T)
-25 - 55 °C
Overload protection
Yes
Product type
Thermal Overload Relay
Weight
0.16 kg
Price history over the last 6 months
Eaton ZB12-4 Thermal Overload Relay, 2.5 - 4 A, 3-Pole, Class 10A, Screw Terminals 278438
Current
R1,335
Lowest
R1,313
Highest
R1,335
Change 24H
+R21   +2%
Week
—   
Month
—   

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