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EMAS JA25B EMAS THERMAL RELAY 0.22 - 0.33 A

EMAS JA25B EMAS THERMAL RELAY 0.22 – 0.33 A

EMAS JA25B thermal relay from the JA Series, designed for motor overload and phase failure protection with a 0.22 to 0.33 A calibration interval, 25 A current rating and IP20 protection degree.

SKU: JA25BMPN: JA25B
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EMAS JA25B Thermal Overload Relay 0.22-0.33A 25A Motor Protection Relay

The EMAS JA25B is a thermal overload relay from the JA Series designed to provide reliable protection for electric motors against overload and phase failure conditions. Featuring a 25A rated current, adjustable thermal current range of 0.22A to 0.33A, AC-3 utilisation category, and manual or automatic reset capability, the JA25B is suitable for industrial motor control systems, automation panels, and contactor assemblies. ([emaselectric.com](https://www.emaselectric.com/products/l--contactors/ja--series/ja25b--ja-series25a-0-22-0-33a-thermic-relay?utm_source=chatgpt.com))

Product Overview

The EMAS JA25B thermal relay provides dependable motor protection by monitoring current levels and disconnecting control circuits during overload conditions. It offers protection against both overload and phase failure for single-phase and three-phase motor applications. ([emaselectric.com](https://www.emaselectric.com/products/l--contactors/ja--series/ja25b--ja-series25a-0-22-0-33a-thermic-relay?utm_source=chatgpt.com))

Designed for use with industrial contactors and motor starters, the JA25B features an adjustable thermal calibration range of 0.22A to 0.33A, AC-3 operation, manual or automatic reset selection, and compact construction for easy installation inside electrical control systems. ([emaselectric.com](https://www.emaselectric.com/products/l--contactors/ja--series/ja25b--ja-series25a-0-22-0-33a-thermic-relay?utm_source=chatgpt.com))

Key Features

  • Manufacturer: EMAS
  • Product Series: JA Series
  • Model: JA25B
  • Thermal overload relay for motor protection
  • 25A rated current
  • Adjustable thermal current range: 0.22A-0.33A
  • Protection against overload conditions
  • Protection against phase failure
  • Manual or automatic reset operation
  • AC-3 utilisation category
  • Suitable for single-phase and three-phase motor applications
  • Designed for industrial control panels and contactor assemblies

Applications

  • Electric motor protection circuits
  • Industrial automation systems
  • Motor starters and contactor assemblies
  • Electrical control panels
  • Pumps and fan motor protection
  • Production machinery
  • Industrial machine control systems

Technical Specifications

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Current Range 0.22–0.33 A
Device Type Thermal Overload Relay
Current 25 A
Phase Single Phase
Series JA Series
Product type Thermal relay
Current rating 25 A
Thermic current calibration interval 0.22-0.33 A
Operational frequency 50 / 60 Hz
Usage category AC-3
Mechanical life 100,000 operations minimum
Electrical life 100,000 operations minimum
Operating frequency 600 mechanical / 600 electrical operations per hour
Insulation voltage 690 V AC
Impulse withstand voltage 6 kV
Dielectric strength 1890 V AC
Isolation resistance 10 MΩ at 500 V DC
Operating temperature -5°C to +40°C
Pollution degree 3
Protection degree IP20
Contact material AgNi
Cable section 1.5-2.5 mm²
Screw torque 1.8 Nm
Short circuit breaking capacity 50 kA
Standard TS EN 60947-4-1

Frequently Asked Questions

What is the EMAS JA25B used for?

The EMAS JA25B is used to protect electric motors against overload and phase failure conditions in industrial motor control applications.

What is the adjustment range of the JA25B?

The EMAS JA25B has an adjustable thermal current calibration range of 0.22A to 0.33A.

Can the EMAS JA25B protect three-phase motors?

Yes. The JA25B provides overload and phase failure protection suitable for both single-phase and three-phase motor applications.

Does the JA25B support manual and automatic reset?

Yes. The EMAS JA25B supports both manual and automatic reset operation for flexible motor protection requirements.

What protection rating does the EMAS JA25B have?

The JA25B has an IP20 protection rating and is designed for installation inside suitable electrical enclosures and control panels.