Overview
The Phoenix Contact STTBS 2.5 is a double-level spring-cage terminal block designed for industrial electrical connections requiring reliable wire termination and distribution. This product features a compact dual-level design that maximizes DIN-rail space efficiency while maintaining secure conductor retention. The STTBS 2.5 series is ideal for control panels, motor starters, PLC input/output terminals, and equipment requiring organized multi-conductor termination in harsh industrial environments.
Key Features
- Double-level spring-cage connection system for 1st and 2nd level termination
- 500 V nominal voltage rating with 22 A nominal current capacity
- Rated wire cross-section: 2.5 mm², accepting 0.08–4 mm² conductors (AWG 28–12)
- DIN-rail mountable on NS 35/7.5 and NS 35/15 profiles
- Spring-cage design allows push-in wire termination without tools
- Wide color options available for circuit identification
Technical Specifications
- Rated Wire Cross-Section: 2.5 mm²
- Acceptable Wire Range: 0.08–4 mm² (28–12 AWG)
- Nominal Voltage: 500 V
- Nominal Current: 22 A
- Connection Method: Spring-cage (both levels)
- Mounting Type: NS 35/7.5, NS 35/15 DIN rail
- Block Width: 5.2 mm
- Levels: 2 (dual-level termination)
- Quantity per Lot: 36 units
Typical Applications
- PLC and industrial controller I/O termination
- Motor control and variable frequency drive connections
- Power distribution and circuit branching in control panels
- Sensor and actuator signal wiring
- Industrial machinery electrical enclosures
- Equipment used in manufacturing, automotive, and process automation
Compatibility & Replacements
Compatible With
- DIN-rail control cabinet systems (IEC 60617-2)
- NS 35/7.5 and NS 35/15 DIN-rail profiles
- Standard industrial PLC input/output modules
- Variable frequency drives (VFDs) and soft starters
- Motor contactors and control relays
- Sensor and actuator signal distribution networks
Replaces / Drop-In Replacement For
- Other double-level 2.5 mm² rated terminal blocks from Phoenix Contact
- Generic spring-cage terminal blocks rated for 500 V / 22 A on NS 35 rails
- Verify compatibility with your system integrator before ordering.
Works With
- DIN-rail mounted control systems and automation platforms
- IEC 61131-3 compliant industrial controllers
- Standard DIN rail power distribution and signal conditioning systems
- Protective grounding and equipotential bonding frameworks
