Phoenix Contact 3031270 STTB 2,5 Double-level spring-cage terminal block 22A

The Phoenix Contact STTB 2,5 is a double-level spring-cage terminal block designed to consolidate two separate circuits into a single compact unit, saving significant panel space. With a nominal voltage of 500 V and a nominal current of 22 A, it accepts conductor cross-sections from 0.08 mm² to 4 mm² rigid and 0.08 mm² to 2.5 mm² flexible via tool-free spring-cage connection.

Technical specifications:

• Part designation: STTB 2,5
• Catalog number: 3031270
• Manufacturer: Phoenix Contact
• EAN: 4017918186814
• Product family: ST
• Number of rows: 2
• Number of connections: 4 (2 per level)
• Potentials: 2
• Nominal voltage: 500 V
• Nominal current: 22 A
• Maximum load current: 26 A (with 4 mm² conductor)
• Rated surge voltage: 6 kV
• Nominal cross section: 2.5 mm²
• Conductor cross-section rigid: 0.08 mm² - 4 mm² (AWG 28-12)
• Conductor cross-section flexible: 0.08 mm² - 2.5 mm² (AWG 28-14)
• Connection method: Spring-cage connection
• Stripping length: 8 mm - 10 mm
• Mounting type: NS 35/7.5, NS 35/15
• Dimensions (W x H x D): 5.2 mm x 67.5 mm x 47.5 mm (on NS 35/7.5) / 55 mm (on NS 35/15)
• Color: gray (RAL 7042)
• Insulating material: PA
• Insulating material group: I
• Flammability rating: UL 94 V0
• Operating temperature range: -60°C - 85°C
• Overvoltage category: III
• Degree of pollution: 3
• Weight (excl. packaging): 9.839 g
• Pack size: 50 pc
• Country of origin: DE

Features and benefits:

• One-handed wiring enabled by spring-cage connection - no screwdriver required
• Accepts very small flexible conductors down to 0.08 mm² without cross-section restriction when using ferrules
• Reliable vibration resistance provided by spring-loaded contact elements
• Two independent circuits in one terminal block reduce DIN rail space requirements
• Compatible with the CLIPLINE complete range of standardized bridging, marking, and testing accessories
• ATEX/IECEx certified for use in hazardous areas (II 2 GD Ex eb IIC Gb)

Applications:

• Two-circuit signal and power distribution in machine building control panels
• Process industry wiring where DIN rail space is limited
• Railway industry installations requiring fire protection compliance
• Plant engineering applications in potentially explosive atmospheres
• High-density terminal strip assemblies using CLIPLINE bridging accessories

Compliant with IEC 60947-7-1. Fire protection certified to DIN EN 45545-2 (R22, R23, R24, R26, HL 1 - HL 3). Part of the Phoenix Contact CLIPLINE complete system.

Also known as: Phoenix Contact STTB 2,5, Phoenix 3031270, Phoenix Contact double-level terminal block, STTB2.5 spring cage terminal.