TE Connectivity ZS4-S 1SNK505310R0000 is a grey 4 mm² SNK Series screw clamp blade disconnect terminal block rated at 25 A and 400 V IEC for DIN rail power and signal wiring applications.
£2.78
The TE Connectivity ZS4-S 1SNK505310R0000 is a compact 4 mm² screw clamp disconnect terminal block designed for reliable power and signal circuit connection, isolation and testing in industrial electrical panels. Part of the ENTRELEC SNK Series, this grey DIN rail terminal combines proven screw clamp technology with an integrated blade disconnect function.
The ZS4-S allows a circuit to be conveniently opened without removing the connected conductors, making it particularly useful for control, measurement, commissioning and troubleshooting applications. Its single-level, two-position design uses a durable polyamide housing and a narrow 5.2 mm pitch, helping maximise wiring density within control cabinets.
With an IEC voltage rating of 400 V, IEC current rating of 25 A and conductor capacity up to 4 mm², the ZS4-S provides a practical solution for industrial power and signal wiring. It mounts on standard TH35-7.5 and TH35-15 DIN rails and provides IP20 finger-safe protection when correctly installed.
Disconnect terminal blocks provide a convenient method of isolating individual circuits without disconnecting field wiring. The TE Connectivity ZS4-S incorporates a blade disconnect mechanism that allows technicians to open the electrical path for testing, commissioning, maintenance and fault-finding while retaining secure conductor terminations.
The SNK Series combines compact dimensions with dependable screw clamp technology for industrial wiring applications. The ZS4-S can accommodate rigid or flexible conductors up to 4 mm², while its standard DIN rail mounting and narrow profile make it well suited to densely populated machinery, automation and control cabinets.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | SNK Series |
| Model | ZS4-S |
| Part number | 1SNK505310R0000 |
| Product type | Screw clamp disconnect terminal block |
| Block function | Disconnect |
| Disconnect type | Blade |
| Connection method | Screw terminal |
| Number of levels | 1 |
| Number of positions | 2 |
| Number of circuits | 1 |
| Rated conductor size | 4 mm² |
| Flexible conductor capacity | 0.2–4 mm² |
| Rigid stranded conductor capacity | 0.2–4 mm² |
| Conductor range | 24–10 AWG |
| IEC rated current | 25 A |
| IEC rated voltage | 400 V |
| Short-time withstand current (1 s) | 480 A |
| IEC impulse withstand voltage | 6000 V |
| Maximum dielectric withstand voltage | 1890 V |
| Power loss | 0.8 W |
| Terminal pitch | 5.2 mm |
| Wire stripping length | 10.5 mm |
| Tool size | 3.5 mm |
| Mounting | DIN rail |
| DIN rail types | TH35-7.5 / TH35-15 |
| Housing material | Polyamide |
| Colour | Grey |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Dimensions (W × L × H) | 5.2 × 51.35 × 53 mm |
| Product weight | 8.6 g |
| Operating temperature range | -55 to +110 °C |
| Installation temperature range | -5 to +40 °C |
| Circuit application | Power and signal |
The ZS4-S is a 4 mm² screw clamp disconnect terminal block used to connect and conveniently isolate power or signal circuits in industrial control panels and automation systems.
The terminal accepts a single flexible or rigid stranded conductor from 0.2–4 mm², corresponding to a conductor range up to approximately 24–10 AWG.
The ZS4-S has an IEC rated current of 25 A and an IEC rated voltage of 400 V.
The terminal incorporates a blade disconnect mechanism that allows the electrical circuit to be opened for isolation, testing or maintenance without removing the connected conductors.
The terminal is designed for DIN rail mounting and is compatible with standard TH35-7.5 and TH35-15 rails.
TE Connectivity ENTRELEC SNK Series terminal blocks are designed for dependable industrial wiring, combining compact DIN rail installation, robust connection technology and practical circuit management for machinery, automation and electrical control systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...