EMAS JA25D EMAS THERMAL RELAY 0.42 - 0.63 A

Why Choose the EMAS JA25D Thermal Relay?

The EMAS JA25D is a compact and reliable thermal overload relay designed to protect electric motors and contactor-controlled circuits from overload conditions. As part of the EMAS JA Series, it is suitable for industrial control panels, automation systems and machinery where dependable motor protection is required.

This thermal relay provides protection against overload and phase failure, helping reduce the risk of motor overheating, insulation damage and unplanned downtime. Its adjustable thermic current calibration range allows the relay to be set accurately to match the protected motor or circuit.

With a 0.42 A to 0.63 A calibration interval, 25 A current rating and IP20 protection degree, the EMAS JA25D is well suited to low-current motor protection applications. Manual or automatic reset functionality provides flexibility for industrial maintenance and control environments.

Key Advantages

• Reliable thermal relay for motor overload protection.
• 0.42 A to 0.63 A adjustable calibration range for accurate protection.
• Protects against overload and phase failure conditions.
• Suitable for single-phase and three-phase motor protection circuits.
• Manual or automatic reset for flexible operation.
• Compact format for use with contactors and industrial control panels.

Key Features

• EMAS JA Series thermal relay.
• Product code JA25D.
• Thermic current calibration interval of 0.42 A to 0.63 A.
• 25 A current rating.
• AC-3 usage category.
• Operational frequency of 50 / 60 Hz.
• IP20 protection degree.
• AgNi contact material for reliable electrical performance.
• Protection against phase failure.
• Manual or automatic reset capability.

Technical Specifications

• Manufacturer: EMAS
• Series: JA Series
• Model: JA25D
• Product type: Thermal relay
• Current rating: 25 A
• Thermic current calibration interval: 0.42-0.63 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 JA25D monitor current in motor circuits and help disconnect the control circuit when an overload condition occurs. This helps protect motors from overheating, excessive current draw and premature failure.

The JA25D is especially useful for low-current motor protection where accurate adjustment is required. Its overload protection, phase failure protection and reset options make it suitable for control panels, production machinery and general industrial automation installations.

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.