1sna146279r1100 – dr2,5/5,n,2l,ex

Why Choose the TE Connectivity 1SNA146279R1100 DR2.5/5.N.2L.EX Spring Terminal Block?

The TE Connectivity 1SNA146279R1100, manufacturer designation DR2.5/5.N.2L.EX, is a compact blue spring-clamp feed-through miniblock terminal block designed for space-efficient conductor termination in industrial control, instrumentation and hazardous-area electrical assemblies. Its miniature format combines dependable spring connection technology with a narrow footprint for installations where panel and rail space are limited.

The DR2.5/5.N.2L.EX has a 2.5 mm² rated cross-section and just 5 mm spacing. The spring-clamp connection accepts insulated-ferrule conductors from 0.5–1.5 mm², providing a secure connection without the routine tightening associated with conventional screw terminals.

Measuring only 33 × 5 × 24.5 mm and weighing approximately 4 g, the 1SNA146279R1100 is particularly suitable for compact junction boxes and densely populated industrial assemblies. It mounts on TH15-5.5 miniature DIN rail and belongs to an Ex terminal block family covered by ATEX component certification for incorporation into appropriately designed hazardous-area equipment.

Key Advantages

• Compact spring-clamp feed-through miniblock for space-constrained installations.
• 2.5 mm² rated cross-section for industrial signal and control wiring.
• Only 5 mm wide for high-density terminal assemblies.
• Spring-clamp technology provides secure conductor retention without routine screw tightening.
• Blue housing provides clear visual identification within organised panel wiring.
• TH15-5.5 miniature DIN rail mounting supports compact electrical assemblies.
• Ex-certified terminal family for appropriately engineered hazardous-area equipment.

Key Features

• TE Connectivity DR2.5/5 miniblock family.
• DR2.5/5.N.2L.EX feed-through configuration.
• 2.5 mm² rated cross-section.
• 5 mm terminal spacing.
• Spring-clamp connection technology.
• Insulated-ferrule conductor capacity of 0.5–1.5 mm².
• Single connection level.
• Blue polyamide insulation housing.
• Compact 33 × 5 × 24.5 mm construction.
• -55 to +110 °C operating temperature range.
• Mounting on TH15-5.5 miniature DIN rail.

Reliable Spring-Clamp Wiring for Compact Industrial Assemblies

Spring-clamp terminal technology maintains contact pressure on the conductor without relying on a screw connection, providing a practical solution for industrial equipment exposed to vibration or repeated operating cycles. The DR2.5/5.N.2L.EX combines this connection method with a miniature terminal format to maximise wiring density in compact electrical assemblies.

Its 5 mm width and TH15-5.5 rail compatibility make the terminal particularly useful in instrumentation boxes, compact control equipment and other installations where standard 35 mm DIN rail terminals may consume unnecessary space. The Ex-certified product family also supports incorporation into appropriately designed and certified hazardous-area equipment.

Typical Applications

• Hazardous-area electrical assemblies.
• Compact industrial junction boxes.
• Instrumentation and process-control systems.
• Industrial automation equipment.
• Signal and control circuit termination.
• Machine-building electrical systems.
• Space-constrained control cabinets.
• OEM electrical equipment and compact panel assemblies.