TE Connectivity ENTRELEC ZS4-D2-BL 1SNK505220R0000 is a blue 5.2 mm pitch double-deck SNK Series feed-through screw clamp DIN rail terminal block providing two circuits and four positions, rated at 29 A and 800 V IEC for conductors up to 4 mm² and supplied in a pack of 50.
£2.27
The TE Connectivity ENTRELEC ZS4-D2-BL 1SNK505220R0000 is a blue double-deck feed-through screw clamp terminal block from the SNK Series, designed to provide two independent circuits within a compact DIN rail footprint. With 2 levels, 2 circuits and 4 connection positions, it is an efficient solution for high-density control, automation and industrial wiring applications.
The ZS4-D2-BL uses proven screw clamp termination and accepts flexible conductors from 0.22–4 mm² and rigid stranded conductors from 0.2–4 mm². Its narrow 5.2 mm pitch helps maximise available DIN rail space while providing an IEC current rating of 29 A and voltage rating of 800 V.
Manufactured with a durable blue polyamide housing, the terminal block mounts onto standard TH35-7.5 or TH35-15 DIN rail. It provides IP20 protection, a UL 94V-0 flammability rating and an operating temperature range of -55 to +110 °C. The 1SNK505220R0000 is supplied in a pack of 50 terminal blocks.
Double-deck terminal blocks provide two independent conductor paths within a narrow DIN rail footprint, helping panel builders increase connection density without significantly increasing enclosure size. Separating the circuits across two levels also helps maintain an organised wiring layout while keeping individual termination points accessible for installation, testing and maintenance.
The ENTRELEC ZS4-D2-BL combines two feed-through circuits with a compact 5.2 mm pitch and screw clamp termination. This makes it particularly suitable for control cabinets, automation systems and machinery where multiple circuits must be accommodated efficiently while retaining secure and serviceable conductor connections.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ENTRELEC SNK |
| Model | ZS4-D2-BL |
| Part number | 1SNK505220R0000 |
| Product type | Screw clamp terminal block |
| Block function | Feed-through |
| Configuration | Double-deck |
| Colour | Blue |
| Number of circuits | 2 |
| Number of levels | 2 |
| Number of positions | 4 |
| Gauge type | A3-B3 |
| Product spacing | 5.2 mm |
| IEC current rating | 29 A |
| UL current rating | 20 A |
| CSA current rating | 20 A |
| IEC voltage rating | 800 V |
| UL / CSA operating voltage | 300 V |
| CSA voltage rating | 300 V |
| Short-time withstand current, 1 s | 480 A |
| IEC impulse withstand voltage | 8 kV |
| Maximum dielectric withstand voltage | 2000 V |
| Power loss | 1.9 W |
| Flexible conductor capacity | 0.22–4 mm² |
| Rigid stranded conductor capacity | 0.2–4 mm² |
| Flexible conductor range | 24–12 AWG |
| Insulated ferrule capacity | 0.22–2.5 mm² |
| Non-insulated ferrule capacity | 0.22–4 mm² |
| Twin ferrule capacity | 0.22–1.5 mm² |
| Two flexible conductors per screw clamp | 0.2–1.5 mm² |
| Two rigid stranded conductors per screw clamp | 0.2–1.5 mm² |
| Wire stripping length | 10 mm |
| Tool size | 3.5 mm |
| DIN rail mounting | TH35-15 / TH35-7.5 |
| Housing material | Polyamide |
| Height | 70.4 mm |
| Length | 65.5 mm |
| Depth | 65.5 mm |
| Weight | 15.3 g |
| Operating temperature | -55 to +110 °C |
| Installation temperature | -5 to +40 °C |
| Ingress protection | IP20 |
| UL flammability rating | UL 94V-0 |
| Pack quantity | 50 |
It is a blue double-deck feed-through screw clamp terminal block from the ENTRELEC SNK Series, providing two independent circuits and four connection positions in a compact DIN rail format.
The ZS4-D2-BL has 2 levels and 2 independent circuits, with a total of 4 connection positions.
The terminal block is rated at 29 A and 800 V under IEC specifications, with UL and CSA current ratings of 20 A and a maximum UL/CSA main-circuit operating voltage of 300 V.
It accepts one flexible conductor from 0.22–4 mm² or one rigid stranded conductor from 0.2–4 mm², with additional capacities available for ferrules and dual-conductor connections.
The 1SNK505220R0000 is supplied in a pack quantity of 50 terminal blocks.
TE Connectivity ENTRELEC SNK Series double-deck terminal blocks provide compact, organised and dependable conductor connections for professional panel builders, machine manufacturers, automation engineers and industrial maintenance applications.
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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...