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zs4-sf1-r1 – 4mm fused terminal with indicator 24vdc
TE Connectivity 1SNK508412R0000 ZS4-SF1-R1 is a 4 mm² ENTRELEC SNK screw clamp fused DIN rail terminal block for 5 × 20 mm and 5 × 25 mm fuses with an integrated red LED blown-fuse indicator for 24–110 V circuits.
£6.95
Why Choose the TE Connectivity ZS4-SF1-R1 1SNK508412R0000 Fused Terminal Block?
The TE Connectivity ZS4-SF1-R1 1SNK508412R0000 is a 4 mm² fused screw clamp terminal block with blown-fuse indicator designed to combine DIN rail wiring termination and individual circuit protection within a compact industrial control panel assembly. Part of the TE Connectivity ENTRELEC SNK series, it accepts standard 5 × 20 mm and 5 × 25 mm cartridge fuses and incorporates a red LED indicator for rapid identification of a blown fuse.
Designed for control, automation and power distribution applications, the ZS4-SF1-R1 uses proven screw clamp connection technology to provide secure conductor termination. Its integrated fuse holder allows a protected circuit to be isolated and its fuse replaced without requiring a separate panel-mounted fuse carrier, helping create compact and serviceable terminal assemblies.
The terminal has a rated cross-section of 4 mm², an 8 mm pitch and two connection positions. The ZS4-SF1-R1 version incorporates a red LED blown-fuse indicator rated for 24–110 V, making fault identification faster during inspection and maintenance of industrial electrical equipment.
Key Advantages
- Combines terminal connection and fuse protection in one DIN rail-mounted device.
- Integrated red LED blown-fuse indicator simplifies fault identification.
- Indicator designed for 24–110 V circuits.
- Accepts standard 5 × 20 mm and 5 × 25 mm fuses.
- 4 mm² rated cross-section for industrial control and distribution wiring.
- Reliable screw clamp connection provides secure conductor termination.
Key Features
- TE Connectivity ENTRELEC SNK series.
- ZS4-SF1-R1 fused terminal block.
- 4 mm² rated cross-section.
- 6.3 A IEC rated current.
- 630 V IEC rated voltage.
- Integrated red LED blown-fuse indicator.
- 24–110 V indicator voltage range.
- Suitable for 5 × 20 mm and 5 × 25 mm cartridge fuses.
- 8 mm product spacing with two connection positions.
- Grey and dark grey polyamide housing.
- UL 94V-0 flammability rating.
- Designed for standard DIN rail mounting.
Integrated Fuse Protection and Fault Indication
Fused terminal blocks provide circuit protection directly at the wiring termination point, allowing individual control or signal circuits to be protected without installing separate fuse holders elsewhere in the panel. The hinged fuse carrier provides convenient access to the cartridge fuse while retaining an organised DIN rail terminal layout.
The ZS4-SF1-R1 further simplifies maintenance through its integrated red LED blown-fuse indicator. When used within the specified voltage range, the indicator helps maintenance personnel identify the affected circuit quickly, while compatibility with commonly used 5 × 20 mm and 5 × 25 mm fuses provides flexibility for industrial control applications.
Typical Applications
- Industrial electrical control panels.
- PLC and automation control circuits.
- Machine control cabinets.
- Protected instrumentation and signal circuits.
- Power distribution and switchgear assemblies.
- Industrial equipment requiring individual fused circuit protection.
Technical Specifications
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| Number of Connection Points | 24 | |
|---|---|---|
| Connection | Spring clamp | |
| Terminal Type | Fuse | |
| Conductor Size | 4 mm² | |
| Number of Levels | 1 | |
| Product Series | TE SNK | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / ENTRELEC | |
| Series | SNK | |
| Model | ZS4-SF1-R1 | |
| Part number | 1SNK508412R0000 | |
| Product type | Fused screw clamp terminal block | |
| Terminal function | Fuse | |
| Connection type | Screw connection / screw clamp | |
| Rated cross-section | 4 mm² | |
| IEC rated current | 6.3 A | |
| IEC rated voltage | 630 V | |
| UL rated current | 10 A | |
| UL rated voltage | 300 V | |
| Indicator | Red LED blown-fuse indicator | |
| Indicator voltage | 24–110 V | |
| Indicator leakage current | <0.5 mA | |
| Fuse size | 5 × 20 mm / 5 × 25 mm | |
| Fuse supplied | No | |
| Number of positions | 2 | |
| Number of levels | 1 | |
| Product spacing | 8 mm | |
| Conductor cross-section | 0.2–4 mm² | |
| Wire size | 24–12 AWG | |
| Wire stripping length | 11 mm | |
| Colour | Grey / dark grey | |
| Insulation material | Polyamide | |
| Flammability rating | UL 94V-0 | |
| Mounting | DIN rail | |
| Width | 8 mm | |
| Height | 59.7 mm | |
| Depth | 45.6 mm | |
| Operating temperature | -55 to +110 °C | |
| Standard | IEC 60947-7-3 |
Frequently Asked Questions
What is the TE Connectivity ZS4-SF1-R1 1SNK508412R0000 used for?
The ZS4-SF1-R1 is a fused DIN rail terminal block used to terminate and protect individual electrical circuits in industrial control panels, automation equipment and distribution assemblies.
What fuse sizes does the ZS4-SF1-R1 accept?
The terminal block is designed for 5 × 20 mm and 5 × 25 mm cartridge fuses. The fuse is not supplied with the terminal block.
Does the 1SNK508412R0000 have a blown-fuse indicator?
Yes. The ZS4-SF1-R1 incorporates a red LED blown-fuse indicator to help identify a defective circuit quickly.
What voltage is the fuse indicator designed for?
The integrated red LED blown-fuse indicator is designed for operation on 24–110 V circuits.
What conductor size can the ZS4-SF1-R1 accept?
The terminal has a 4 mm² rated cross-section and supports conductors within the applicable connection range up to 4 mm².
How is the ZS4-SF1-R1 installed?
The terminal block is designed for DIN rail mounting and uses screw clamp terminals to provide secure conductor connections within industrial electrical panels.
Trusted for Fused Industrial Terminal Connections
TE Connectivity ENTRELEC SNK fused terminal blocks provide panel builders, automation engineers and electrical installers with compact circuit protection, dependable screw clamp connections and convenient fault identification for professional industrial wiring systems.
