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1snk505331r0000 – zs4-s-t2-or [pk=50] switch block
TE Connectivity ZS4-S-T2-OR 1SNK505331R0000 is an orange DIN rail screw clamp disconnect terminal block with a blade isolation mechanism, two 2 mm test sockets, conductor capacity up to 4 mm² and IEC ratings of 25 A and 400 V, supplied in a pack of 50.
£2.51
Why Choose the TE Connectivity ZS4-S-T2-OR 1SNK505331R0000 Switch Terminal Block?
The TE Connectivity ZS4-S-T2-OR 1SNK505331R0000 is a compact industrial screw clamp disconnect terminal block with integrated test sockets, designed for circuit isolation, testing and measurement within control panels, switchgear and automation systems. As part of the TE Connectivity ENTRELEC SNK series, it combines a blade disconnect mechanism with two built-in test sockets for convenient access during commissioning, diagnostics and maintenance.
The ZS4-S-T2-OR uses proven screw clamp connection technology to provide secure conductor termination, while its screwdriver or hand-operated disconnect blade allows the circuit to be isolated without removing installed wiring. Two integrated 2 mm diameter test sockets simplify electrical testing and measurement, helping technicians work efficiently while keeping panel wiring organised.
With conductor capacity up to 4 mm² / 10 AWG, an IEC current rating of 25 A and an IEC voltage rating of 400 V, the ZS4-S-T2-OR is suitable for industrial control and instrumentation circuits. Its compact 5.2 mm spacing, orange housing and DIN rail mounting format make it an effective solution for professional electrical panel construction.
Key Advantages
- Integrated blade disconnect function for convenient circuit isolation.
- Two built-in 2 mm diameter test sockets simplify testing and measurement.
- 25 A IEC rated current and 400 V IEC rated voltage.
- Accepts conductors up to 4 mm² / 10 AWG depending on conductor configuration.
- Compact 5.2 mm terminal spacing helps maximise available DIN rail space.
- Supplied in a pack quantity of 50 for panel building and production requirements.
Key Features
- TE Connectivity ENTRELEC SNK ZS4-S-T2-OR terminal block.
- Disconnect / switch terminal block function.
- Blade disconnect mechanism operated by hand or screwdriver.
- Two integrated 2 mm test sockets.
- Screw clamp connection technology.
- Single-level, single-circuit configuration.
- Two connection positions.
- 25 A IEC current rating.
- 400 V IEC voltage rating.
- 5.2 mm product spacing.
- Orange polyamide housing.
- IP20 protection rating.
- UL 94V-0 flammability rating.
Convenient Circuit Isolation and Testing for Industrial Panels
Disconnect terminal blocks with integrated test sockets provide an efficient way to isolate and test individual electrical circuits without removing connected conductors. The built-in test points allow measurement equipment to be connected directly at the terminal, simplifying commissioning, diagnostics and preventative maintenance within industrial control systems.
The ZS4-S-T2-OR combines a screwdriver or hand-operated blade disconnect with two 2 mm test sockets and robust screw clamp termination. Its profile is aligned with ZS4 feed-through terminal blocks, supporting consistent marking and compatible end-section arrangements while helping create organised and space-efficient DIN rail assemblies.
Typical Applications
- Industrial control panels and electrical cabinets.
- Control circuit isolation, testing and measurement.
- Instrumentation and process control circuits.
- Machine building and OEM automation systems.
- PLC input and output wiring.
- Switchgear, commissioning and maintenance circuits.
Technical Specifications
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| Number of Levels | 1 | |
|---|---|---|
| Connection | Spring clamp | |
| Terminal Type | Disconnect / Test | |
| Product Series | TE SNK | |
| Colour | Orange | |
| Manufacturer | TE Connectivity | |
| Brand / product family | ENTRELEC | |
| Series | SNK | |
| Model | ZS4-S-T2-OR | |
| Manufacturer part number | 1SNK505331R0000 | |
| Product type | Screw clamp disconnect terminal block with test sockets | |
| Block function | Disconnect | |
| Disconnect type | Blade | |
| Connection type | Screw clamp | |
| Test sockets | 2 integrated sockets | |
| Test socket diameter | 2 mm | |
| Number of levels | 1 | |
| Number of circuits | 1 | |
| Number of positions | 2 | |
| Gauge type | A3-B3 | |
| Rated current (IEC) | 25 A | |
| Rated current (UL) | 25 A | |
| Rated voltage (IEC) | 400 V | |
| Rated voltage (CSA) | 150 V | |
| Operating voltage (UL / CSA) | 150 V | |
| Impulse withstand voltage (IEC) | 6000 V | |
| Dielectric withstand voltage | 1890 V | |
| Short-time withstand current at 1 s | 480 A | |
| Power loss | 0.8 W | |
| Flexible conductor range | 0.22–4 mm² / 24–10 AWG | |
| Rigid stranded conductor range | 0.2–4 mm² / 24–10 AWG | |
| Insulated ferrule capacity | 0.22–2.5 mm² / 24–14 AWG | |
| Non-insulated ferrule capacity | 0.22–4 mm² / 24–10 AWG | |
| Twin ferrule capacity | 0.22–1.5 mm² / 24–16 AWG | |
| Two flexible conductors per clamp | 0.2–1.5 mm² / 24–16 AWG | |
| Two rigid stranded conductors per clamp | 0.2–1.5 mm² / 24–16 AWG | |
| Wire stripping length | 10.5 mm | |
| Tool size | 3.5 mm | |
| Terminal spacing | 5.2 mm | |
| Housing material | Polyamide | |
| Colour | Orange | |
| Protection rating | IP20 | |
| Flammability rating | UL 94V-0 | |
| Mounting type | DIN rail | |
| Height | 53 mm | |
| Length | 51.35 mm | |
| Depth | 51.4 mm | |
| Weight | 8.9 g | |
| Operating temperature | -55–110 °C | |
| Installation temperature | -5–40 °C | |
| Pack quantity | 50 pieces | |
| Barcode | 3472595053315 |
Frequently Asked Questions
What is the TE Connectivity ZS4-S-T2-OR 1SNK505331R0000 used for?
The ZS4-S-T2-OR is a screw clamp disconnect terminal block designed for connecting, isolating and testing electrical circuits in industrial control panels, instrumentation systems and automation equipment.
Does the ZS4-S-T2-OR include test sockets?
Yes. The ZS4-S-T2-OR incorporates two built-in 2 mm diameter test sockets, providing convenient connection points for electrical testing and measurement equipment.
What are the current and voltage ratings of the ZS4-S-T2-OR?
The terminal block has an IEC current rating of 25 A and an IEC voltage rating of 400 V.
What conductor sizes can the ZS4-S-T2-OR accept?
The terminal accepts flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm², with permitted capacities depending on the conductor and ferrule configuration.
How many TE Connectivity ZS4-S-T2-OR terminal blocks are supplied in a pack?
The ZS4-S-T2-OR 1SNK505331R0000 is supplied in a pack quantity of 50 pieces, making it suitable for control-panel production, machine building and industrial electrical installations.
Trusted Industrial Connectivity from TE Connectivity
TE Connectivity ENTRELEC SNK disconnect terminal blocks combine secure conductor termination with convenient isolation and testing features, providing panel builders, automation engineers and maintenance professionals with practical solutions for industrial electrical systems.
