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zs4-sf1-r3 – 4mm fused term red ind
TE Connectivity ZS4-SF1-R3 1SNK508414R0000 is an ENTRELEC SNK 4 mm² screw clamp fused terminal block with red indication, 8 mm spacing and IEC ratings of 6.3 A and 630 V for protected industrial power and signal circuits.
£6.95
Why Choose the TE Connectivity ZS4-SF1-R3 Fused Terminal Block?
The TE Connectivity ZS4-SF1-R3 is a compact and reliable 4 mm² screw clamp fused terminal block with red indication designed for protected power and signal circuits in industrial control panels, machinery and automation systems. Part of the TE Connectivity ENTRELEC SNK terminal block series, it combines fuse functionality with secure screw termination in a space-efficient DIN rail format.
The ZS4-SF1-R3 provides a convenient means of incorporating replaceable circuit protection directly into a modular terminal assembly. Its red indication function helps maintenance personnel identify fuse-related circuit conditions more quickly, while the grey and dark-grey polyamide housing and modular SNK construction support organised, professional panel wiring.
With a 4 mm² nominal wire size, 6.3 A IEC current rating and 630 V IEC voltage rating, the ZS4-SF1-R3 is suitable for control, signalling and auxiliary power circuits. Its 8 mm terminal spacing, two-position configuration and compatibility with TH35 DIN rails make it particularly useful where compact, serviceable circuit protection is required.
Key Advantages
- Combines fuse protection and conductor termination in one modular DIN rail component.
- Red indication supports rapid identification of fuse-related circuit conditions.
- 4 mm² nominal wire size for industrial power and signal wiring.
- 6.3 A IEC current rating for protected control and auxiliary circuits.
- 630 V IEC voltage rating for industrial electrical installations.
- Compact 8 mm terminal spacing supports space-efficient panel construction.
- Reliable screw clamp connection technology provides secure conductor termination.
- DIN rail mounting simplifies installation within modular terminal assemblies.
Key Features
- TE Connectivity ENTRELEC SNK series.
- 4 mm² fused screw clamp terminal block.
- Red indication for easier circuit status identification.
- Single-level, two-position configuration.
- One protected electrical circuit.
- 8 mm product spacing.
- 6.3 A rated current to IEC.
- 630 V rated voltage to IEC.
- 8000 V IEC impulse withstand voltage.
- 2200 V maximum dielectric withstand voltage.
- Grey and dark-grey polyamide housing.
- UL 94 V-0 flammability rating.
- IP20 ingress protection.
- Suitable for TH35-7.5 and TH35-15 DIN rails.
- Operating temperature range of -55 to +110 °C.
Integrated Protection for Industrial Control Circuits
Fused terminal blocks combine conductor termination and replaceable overcurrent protection within a single DIN rail component. This arrangement allows individual control, signalling and auxiliary circuits to be protected while maintaining an organised and serviceable panel layout, reducing the need for separate fuse-holder components.
The ZS4-SF1-R3 adds red indication to the proven ENTRELEC SNK modular terminal platform, helping technicians identify circuit conditions during troubleshooting and maintenance. Its screw clamp connections, compact footprint and broad conductor compatibility make it well suited to professional industrial panel construction.
Typical Applications
- Industrial control panels and electrical cabinets.
- PLC input and output circuit protection.
- Machine building and OEM automation equipment.
- Instrumentation and process control systems.
- Protected signalling and auxiliary circuits.
- Power and signal distribution assemblies.
- Circuits requiring fused protection with visual indication.
Technical Specifications
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| Number of Connection Points | 24 | |
|---|---|---|
| Product Series | TE SNK | |
| Connection | Spring clamp | |
| Terminal Type | Fuse | |
| Conductor Size | 4 mm² | |
| Number of Levels | 1 | |
| Colour | Grey | |
| Manufacturer | TE Connectivity | |
| Brand / range | ENTRELEC | |
| Series | SNK | |
| Model | ZS4-SF1-R3 | |
| Manufacturer part number | 1SNK508414R0000 | |
| Product type | Screw clamp fused terminal block with red indication | |
| Block function | Fuse | |
| Circuit application | Power & signal | |
| Number of circuits | 1 | |
| Number of levels | 1 | |
| Number of positions | 2 | |
| Wire size | 4 mm² | |
| Flexible conductor capacity | 0.22–4 mm² / 24–10 AWG | |
| Rigid stranded conductor capacity | 0.2–4 mm² / 24–10 AWG | |
| Insulated ferrule capacity | 0.22–4 mm² / 24–12 AWG | |
| Twin ferrule capacity | 0.22–2.5 mm² / 24–14 AWG | |
| Product spacing | 8 mm | |
| Rated current (IEC) | 6.3 A | |
| Rated current (UL) | 10 A | |
| Rated current (CSA) | 6.3 A | |
| Rated voltage (IEC) | 630 V | |
| Rated voltage (CSA) | 300 V | |
| Operating voltage (UL / CSA) | 300 V | |
| Impulse withstand voltage (IEC) | 8000 V | |
| Dielectric withstand voltage | 2200 V | |
| Wire stripping length | 11 mm | |
| Connection type | Screw clamp | |
| Housing material | Polyamide | |
| Flammability rating | UL 94 V-0 | |
| Colour | Grey / dark grey | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Compatible DIN rails | TH35-7.5 / TH35-15 | |
| Operating temperature | -55 to +110 °C | |
| Installation temperature | -5 to +40 °C | |
| Dimensions (H × W × D) | 59.7 × 8 × 45.6 mm | |
| Weight | approx. 13.3 g |
Frequently Asked Questions
What is the TE Connectivity ZS4-SF1-R3 used for?
The ZS4-SF1-R3 combines screw clamp conductor termination, fuse protection and red indication for power and signal circuits in industrial control panels and automation systems.
What are the electrical ratings of the ZS4-SF1-R3?
The terminal block has an IEC current rating of 6.3 A and an IEC voltage rating of 630 V, with an IEC impulse withstand rating of 8000 V.
What conductor sizes can the ZS4-SF1-R3 accept?
The ZS4-SF1-R3 accepts flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm², with conductor sizes up to 10 AWG.
What is the terminal spacing of the ZS4-SF1-R3?
The ZS4-SF1-R3 has a compact 8 mm terminal spacing, allowing protected circuits to be incorporated efficiently into DIN rail terminal assemblies.
What DIN rails are compatible with the ZS4-SF1-R3?
The terminal block is designed for mounting on standard TH35-7.5 and TH35-15 DIN rails commonly used in industrial electrical cabinets and control panels.
Trusted Industrial Connection Technology
TE Connectivity ENTRELEC SNK fused terminal blocks provide panel builders, automation engineers and machine manufacturers with compact circuit protection, dependable screw clamp connectivity and efficient modular installation for professional industrial electrical systems.
