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EMAS JA25A Thermal Overload Relay 0.15-0.25A 25A Motor Protection Relay
The EMAS JA25A is a thermal overload relay from the JA Series designed to provide reliable motor protection against overload and phase failure conditions. Featuring a 25A rated current, adjustable thermal current range of 0.15A to 0.25A, AC-3 utilisation category, and manual or automatic reset functionality, the JA25A is suitable for industrial control panels, contactor assemblies, automation systems, and motor protection applications.
Product Overview
The EMAS JA25A thermal relay is designed to protect electric motors and electrical circuits from excessive current conditions that can cause overheating and equipment damage. It provides protection against overload and phase failure for both single-phase and three-phase motor applications.
With an adjustable thermal calibration range of 0.15A to 0.25A, IP20 protection, AgNi contact material, and support for manual or automatic reset operation, the JA25A provides dependable performance in industrial automation and motor control systems.
Key Features
- Manufacturer: EMAS
- Product Series: JA Series
- Model: JA25A
- Thermal overload relay for motor protection
- 25A contact current rating
- Adjustable thermal current range: 0.15A-0.25A
- Protection against overload conditions
- Protection against phase failure
- Manual or automatic reset capability
- AC-3 utilisation category
- Suitable for single-phase and three-phase applications
- Compact design for industrial control panels
Technical Specifications
| Specification | Details |
|---|---|
| Brand | EMAS |
| Part Number | JA25A |
| Product Type | Thermal Overload Relay |
| Series | JA Series |
| Rated Current (Ie) | 25A |
| Thermal Current Calibration Range | 0.15A-0.25A |
| Usage Category | AC-3 |
| Operational Frequency | 50-60Hz |
| Mechanical Life | 100,000 operations minimum |
| Electrical Life | 100,000 operations minimum |
| Operating Frequency | 600 operations/hour mechanical and electrical |
| Insulation Voltage | 690V AC |
| Impulse Withstand Voltage | 6kV |
| Dielectric Strength | 1890V AC |
| Isolation Resistance | 10MΩ (500V DC) |
| Operating Temperature | -5°C to +40°C |
| Protection Rating | IP20 |
| Contact Material | AgNi |
| Cable Section | 1.5-2.5mm² |
| Screw Torque | 1.8Nm |
| Short Circuit Breaking Capacity | 50kA |
| Standard | TS EN 60947-4-1 |
Applications
- Electric motor protection circuits
- Industrial automation systems
- Electrical control panels
- Contactor assemblies
- Pumps and fan motor protection
- Production machinery
- Machine control systems
Frequently Asked Questions
What is the EMAS JA25A used for?
The EMAS JA25A is used to protect electric motors and control circuits against overload and phase failure conditions.
What is the adjustment range of the JA25A?
The EMAS JA25A has an adjustable thermal current calibration range of 0.15A to 0.25A.
Can the EMAS JA25A protect three-phase motors?
Yes. The JA25A provides overload and phase failure protection suitable for both single-phase and three-phase motor applications.
Does the JA25A support manual and automatic reset?
Yes. The EMAS JA25A supports both manual and automatic reset operation for flexible industrial control applications.
What protection rating does the EMAS JA25A have?
The JA25A has an IP20 protection rating and is designed for installation inside suitable electrical enclosures and control panels.
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