TB2503 3-Pin Terminal Block - 25A 600V Panel Mount Barrier Connector

The TB2503 is a panel-mounted fixed barrier terminal block designed for secure and reliable electrical connections in industrial control panels, power distribution boards, and general wiring applications. It features a 3-pole configuration with a rated voltage of 600V and a rated current of 25A, making it suitable for moderate-power circuits that require a robust, screw-terminated interface. The terminal block accepts wire sizes up to 6.0 mm² (AWG 10) and uses M4 zinc-plated steel screws for clamping, with a rated torque of 1.2 N·m to ensure consistent contact pressure without damaging conductors. Its insulator body is made from flame-retardant PC (polycarbonate) rated UL94V-2 (with UL94V-0 available as an option), and the conductor is brass with nickel plating for corrosion resistance. The unit measures 50.5 mm × 28.0 mm × 19.0 mm (L × W × H) and includes reserved installation holes on both sides for panel mounting. A transparent protective cover is supplied with each block, providing finger-safe protection and allowing visual inspection of connections. With an operating temperature range of -40°C to +110°C (maximum +220°C), this 3 pin terminal block is built to withstand demanding thermal environments, while the fixed barrier design prevents accidental short circuits between adjacent poles. Whether the application is a control cabinet, a machine wiring interface, or a DIY electrical project, this barrier terminal block offers a dependable, standards-compliant connection point.

Application

1. Electrical control panels and power distribution boards requiring secure 3-pole connections.
2. Machine wiring interfaces and industrial automation equipment.
3. HVAC control boards and motor control centers.
4. Renewable energy junction boxes and DIY electrical projects.
5. Panel-mounted wiring where a 25A terminal block with protective cover is needed.

Specifications

1. Model: TB2503
2. Number of poles: 3
3. Rated voltage: 600V
4. Rated current: 25A
5. Wire size: 6.0 mm² / AWG 10
6. Screw size: M4 (zinc-plated steel)
7. Rated torque: 1.2 N·m (10.6 in-lb)
8. Pitch: 10.5 mm
9. Dimensions: 50.5 mm × 28.0 mm × 19.0 mm (L × W × H)
10. Insulator material: PC (polycarbonate)
11. Flame retardant grade: UL94V-2 (UL94V-0 optional)
12. Conductor material: Brass, nickel-plated
13. Operating temperature: -40°C to +110°C (maximum +220°C)
14. Mounting: Panel mount with reserved installation holes
15. Accessories: Transparent protective cover included
16. Compliance: RoHS