EMAS JA25A EMAS THERMAL RELAY 0.15 - 0.25 A

Why Choose the EMAS JA25A Thermal Relay?

The EMAS JA25A is a compact and dependable thermal overload relay designed to protect electric motors and contactor-controlled circuits from overload conditions. As part of the EMAS JA Series, this thermal relay is suitable for industrial control panels, automation systems and machinery where reliable motor protection is essential.

The JA25A provides protection against overload, phase failure and abnormal current conditions in both single-phase and three-phase applications. Its adjustable thermal current calibration range allows the relay to be matched accurately to the protected motor, helping reduce the risk of motor damage and unnecessary downtime.

With a 0.15 A to 0.25 A calibration interval, 25 A current rating and IP20 protection degree, the EMAS JA25A is a practical choice for low-current motor protection applications. Its manual or automatic reset functionality supports flexible use in industrial control and maintenance environments.

Key Advantages

• Reliable thermal relay for motor overload protection.
• 0.15 A to 0.25 A adjustable calibration range for precise protection.
• Provides protection against overload and phase failure.
• Suitable for single-phase and three-phase motor protection circuits.
• Manual or automatic reset for flexible operation.
• Compact design for use with contactors and industrial control panels.

Key Features

• EMAS JA Series thermal relay.
• Product code JA25A.
• Thermic current calibration interval of 0.15 A to 0.25 A.
• 25 A current rating.
• AC-3 usage category.
• Operational frequency of 50 / 60 Hz.
• IP20 protection degree.
• AgNi contact material for dependable electrical performance.
• Protection against phase failure.
• Manual or automatic reset capability.

Technical Specifications

• Manufacturer: EMAS
• Series: JA Series
• Model: JA25A
• Product type: Thermal relay
• Current rating: 25 A
• Thermic current calibration interval: 0.15-0.25 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

Reliable Protection for Industrial Motor Circuits

Thermal overload relays such as the EMAS JA25A help protect motors by monitoring current and disconnecting the control circuit when overload conditions occur. This helps prevent overheating, insulation damage and premature motor failure in machinery and automation systems.

The JA25A is especially useful where small motor loads require accurate low-current protection. Its adjustable current setting, phase failure protection and reset options make it suitable for control panels, production machinery and other industrial installations where consistent motor protection is required.

Typical Applications

• Motor protection circuits.
• Industrial contactor assemblies.
• Control panels and electrical cabinets.
• Single-phase and three-phase machinery protection.
• Automation systems and production equipment.
• Pumps, fans, conveyors and small motor-driven equipment.

Trusted for Industrial Motor Protection

EMAS JA Series thermal relays are used in industrial control systems to provide reliable overload and phase failure protection for motor-driven machinery and automation equipment.