TE Connectivity ZS4-SF-R3 1SNK506415R0000 is an ENTRELEC SNK Series screw clamp fuse terminal block for 5 x 20 mm fuses with 115–250 V AC/DC blown-fuse indication, a 6.3 A 500 V IEC rating and a pack quantity of 50.
£12.04
The TE Connectivity ZS4-SF-R3 1SNK506415R0000 is a compact 4 mm²-class screw clamp fuse terminal block designed to combine conductor termination and individual circuit protection within industrial control panels. Part of the TE Connectivity ENTRELEC SNK Series, it accommodates a standard 5 × 20 mm fuse and incorporates a blown-fuse indicator for rapid identification of a faulty circuit.
The ZS4-SF-R3 is designed for 115–250 V AC/DC blown-fuse indication and provides a single fused circuit across two terminal positions. Its 6 mm pitch allows compact installation on DIN rail, while two jumper channels aligned with compatible SNK Series terminals simplify potential distribution across larger terminal assemblies.
With an IEC rated voltage of 500 V and a 6.3 A IEC/CSA current rating, the ZS4-SF-R3 is well suited to protecting control, instrumentation and auxiliary circuits. The grey and dark-grey polyamide housing provides IP20 protection, a UL 94V-0 flammability rating and an operating temperature range of -55 to +110 °C for dependable industrial service.
Fuse terminal blocks combine a field-wiring connection with replaceable overcurrent protection, allowing individual control and auxiliary circuits to be protected without requiring separate panel-mounted fuse holders. The TE Connectivity ZS4-SF-R3 accepts a standard 5 × 20 mm fuse, helping create compact and serviceable protection arrangements within DIN rail assemblies.
The integrated blown-fuse indicator provides rapid visual identification when a fuse has operated on circuits within the 115–250 V AC/DC indication range. Together with aligned jumper channels, screw clamp connections and the modular SNK Series format, this helps simplify installation, troubleshooting and maintenance in industrial automation and control panels.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | SNK Series |
| Model | ZS4-SF-R3 |
| Part number | 1SNK506415R0000 |
| Product type | Screw clamp fuse terminal block |
| Block function | Fuse |
| Connection method | Screw clamp |
| Fuse size | 5 × 20 mm |
| Fuse supplied | No |
| Blown-fuse indicator | 115–250 V AC/DC |
| Indicator leakage current | <0.5 mA |
| Number of levels | 1 |
| Number of positions | 2 |
| Number of circuits | 1 |
| Gauge type | A3-B3 |
| Single flexible conductor capacity | 0.22–4 mm² |
| Single rigid stranded conductor capacity | 0.2–4 mm² |
| Single flexible conductor range | 24–10 AWG |
| Single insulated ferrule capacity | 0.22–4 mm² |
| Single non-insulated ferrule capacity | 0.22–4 mm² |
| Two flexible conductor capacity | 0.2–1.5 mm² |
| Two rigid stranded conductor capacity | 0.2–1.5 mm² |
| Twin ferrule capacity | 0.22–1.5 mm² |
| IEC rated current | 6.3 A |
| CSA rated current | 6.3 A |
| UL rated current | 10 A |
| IEC rated voltage | 500 V |
| CSA rated voltage | 150 V |
| UL / CSA maximum main-circuit operating voltage | 150 V |
| IEC impulse withstand voltage | 6000 V |
| Maximum dielectric withstand voltage | 1890 V |
| Product spacing | 6 mm |
| Wire stripping length | 10.5 mm |
| Tool size | 3.5 mm |
| Mounting type | DIN rail |
| Housing material | Polyamide |
| Colour | Grey and dark grey |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Product height | 70.5 mm |
| Product length | 76.8 mm |
| Product depth | 76.8 mm |
| Product weight | 18.6 g |
| Operating temperature range | -55 to +110 °C |
| Installation temperature range | -5 to +40 °C |
| Pack quantity | 50 |
The ZS4-SF-R3 is a screw clamp fuse terminal block used to provide conductor termination and replaceable fuse protection for control, instrumentation and auxiliary circuits in industrial electrical panels.
The terminal is designed for a standard 5 × 20 mm cartridge fuse. The fuse itself is not supplied with the terminal block.
Yes. The ZS4-SF-R3 incorporates a 115–250 V AC/DC blown-fuse indicator with leakage current below 0.5 mA, helping maintenance personnel identify a failed fuse quickly.
The terminal has an IEC rating of 6.3 A at 500 V, a CSA current rating of 6.3 A and a UL current rating of 10 A.
TE Connectivity part number 1SNK506415R0000 is supplied in a pack quantity of 50 fuse terminal blocks for DIN rail panel installations.
TE Connectivity ENTRELEC SNK Series fuse terminal blocks provide panel builders, automation engineers and maintenance teams with compact conductor termination, replaceable fuse protection and convenient fault indication for reliable industrial control systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...