Overview
The Phoenix Contact Typ STTBS 2.5 is a double-level spring-cage terminal block designed for reliable multi-wire connections in industrial control and automation applications. With a nominal voltage of 500 V and nominal current of 22 A, this terminal block uses spring-cage connection technology on both the 1st and 2nd level, accepting wire cross-sections from 0.08 mm² to 4 mm². The gray polyamide housing provides durability and excellent electrical insulation for harsh industrial environments.
Key Features
- Spring-cage connection on 1st and 2nd level for secure wire termination
- Rated cross-section: 2.5 mm², accommodating flexible and solid conductors
- Mounting on NS 35/7.5 and NS 35/15 DIN rail for quick installation
- Double-level design enables space-efficient high-density wiring
- Gray color meets standard industrial identification schemes
Technical Specifications
Detailed performance parameters ensure compatibility with standard industrial control panels and distribution systems.
Typical Applications
- Industrial control panel wiring and distribution
- PLC and automation equipment interconnect
- Power distribution and feed-through connections
- DIN rail-mounted terminal strips
- Multi-conductor signal and power consolidation
Compatibility & Replacements
Compatible With
- Standard NS 35/7.5 and NS 35/15 DIN rail systems
- Industrial control cabinets and enclosures
- PLC input/output terminals
- Power distribution equipment rated 500V AC
- Wire gauges AWG 28–12 (0.08–4 mm²)
Replaces / Drop-In Replacement For
The Phoenix Contact STTBS 2.5 series includes multiple variants. Verify the specific catalog number on your existing terminal block before ordering. Common gray STTBS 2.5 models include part numbers in the 3038464 family; consult your system integrator for exact model substitution.
Works With
- Standard DIN 35 rail systems
- Phoenix Contact bridging and accessory products
- Industrial control platforms requiring 500V terminal blocks
- Spring-cage connection methodologies






