Phoenix Contact PTTB 2,5 Double-Level Terminal Block

Technical Overview

Double-level terminal block, 500 V / 22 A. Features tool-free push-in connections for 0.14-4 mm² conductors and DIN rail mounting.

Key Features

Easy and tool-free wiring of solid conductors or stranded conductors with ferrules due to Push-in connection technology.
Compact design and front connection enable wiring in confined spaces.
Equipped with an additional test pick-off / testing facility in the double function shaft.
Tested and certified for railway applications, meeting DIN EN 45545-2 fire protection requirements.
Vibration-resistant and maintenance-free conductor connection ensures long-term reliability.
Offers lower insertion force with high conductor pull-out strength from spring-based clamping.
Compatible with the CLIPLINE complete system accessories for bridging, marking, and testing.
ATEX/IECEx certified for installations in hazardous areas.

Technical Specification Matrix

Parameter	Value
Nominal Voltage	500 V
Nominal Current	22 A
Maximum Load Current	26 A (for 4 mm² rigid conductor)
Rated Surge Voltage	6 kV
Overvoltage Category	III
Degree of Pollution	3
Insulating Material	PA (Polyamide)
Flammability Rating (UL 94)	V0
Operating Temperature	-60 °C to 110 °C
Connection Method	Push-in connection, 1st and 2nd level
Rated Cross Section	2.5 mm²
Conductor Cross Section (rigid/flexible)	0.14 mm² - 4 mm² (AWG 26-12)
Stripping Length	8 mm - 10 mm
Number of Connections	4
Number of Levels	2
Mounting Type	DIN Rail (NS 35/7,5, NS 35/15)
Color	Gray (RAL 7042)
Contact Resistance	0.92 mΩ
Certifications	ATEX/IECEx, DIN EN 45545-2 (Railway)
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	6.82 x 0.52 x 4.59

Industrial Applications

1. Railway Rolling Stock Control Systems

This terminal block is ideal for critical control and power distribution applications within railway rolling stock. Its compliance with DIN EN 45545-2 fire protection standards and proven vibration/shock resistance ensures reliability in harsh, dynamic railway environments. The compact dual-level design also conserves valuable space in onboard control cabinets.

Problem Solved

Provides robust, space-saving, and safety-compliant electrical connections for train control systems, mitigating risks from vibration, temperature fluctuations, and fire hazards common in railway operations.

DIN EN 45545-2Vibration ResistanceShock ResistanceSpace-savingRail Transport500 V-60 °C to 110 °C

2. Industrial Control Cabinets in Hazardous Locations

With ATEX/IECEx certification, this double-level terminal block is perfectly suited for use in control panels situated in potentially explosive atmospheres, such as those found in chemical processing plants, oil and gas facilities, or mining operations. Its wide operating temperature range and robust push-in connection ensure safety and operational integrity under demanding conditions.

Problem Solved

Offers safe and reliable electrical termination in hazardous zones by preventing ignition sources and maintaining secure connections amidst environmental stressors, thereby enhancing worker safety and operational continuity.

ATEX/IECExHazardous AreaExplosive AtmosphereProcess Industry500 V-60 °C to 110 °C

3. Compact Process Automation and Machine Building

The PTTB 2,5's compact 5.2 mm width, dual-level design, and tool-free push-in connection make it an excellent choice for high-density wiring in process automation systems and machine control panels where space is at a premium. Its quick connection method significantly reduces installation time and simplifies maintenance for both signal and power circuits.

Problem Solved

Facilitates efficient and reliable high-density wiring in space-constrained industrial control cabinets, speeding up assembly, reducing labor costs, and simplifying future modifications or troubleshooting in complex automation setups.

Compact DesignPush-in ConnectionDual-levelAutomationMachine Building0.14-4 mm²DIN Rail