Terminal block Wago JL/2273-204, 4‑pole, 0.5–2.5 mm², 400 V, 24 A

Wago JL/2273-204 is a 4‑pole terminal block engineered for safe and reliable conductor connections in control cabinets, distribution boards and industrial installations. It supports solid, stranded and ferruled conductors with cross-sections from 0.5 to 2.5 mm², and is rated for up to 400 V and 24 A. The compact design and standardized pitch simplify panel layout and wiring, while the secure clamping mechanism ensures stable contact and reduced maintenance over time.

Advantages

The terminal block offers reliable conductor clamping across a wide range of wire sizes, providing consistent electrical contact and mechanical retention. Its compact footprint allows denser wiring in confined spaces and straightforward mounting on standard DIN rails or modular assemblies. The device is designed for repeatable terminations, facilitating panel modifications and routine servicing while maintaining rated voltage and current performance.

Suitable for

• Control cabinets and automation panels
• Electrical distribution boards
• Industrial machinery wiring and junctions
• Signal and power wiring in building installations

Key specifications

• Number of poles: 4
• Conductor cross-section range: 0.5–2.5 mm²
• Rated voltage: 400 V
• Rated current: 24 A
• Compatible conductor types: solid, stranded, ferruled
• Mounting: compact modular/DIN-rail compatible design

How to use

Strip conductors to the manufacturer-recommended length, insert each conductor into the corresponding pole and secure it with the clamping mechanism. Ensure correct polarity and phase grouping when wiring multiple poles. Verify that conductor sizes fall within the 0.5–2.5 mm² range and that the assembled connections do not exceed the terminal block’s rated voltage and current. After installation, perform a mechanical pull test and, where applicable, an electrical continuity or insulation test according to local standards.

Usage recommendations

Use appropriately sized ferrules for stranded conductors where required, follow applicable national wiring regulations, and avoid exceeding the 400 V/24 A ratings. For long-term reliability, check terminal tightness after initial thermal cycles and during scheduled maintenance intervals.