TE Connectivity ZS25-BL 1SNK512020R0000 is a blue ENTRELEC SNK Series 25 mm² screw clamp feed-through terminal block with 12 mm spacing, a 76 A 1000 V IEC rating and DIN rail mounting for industrial power and signal connections.
£2.57
The TE Connectivity ZS25-BL 1SNK512020R0000 is a high-capacity 25 mm² screw clamp feed-through terminal block designed for reliable power and signal connections in industrial electrical installations. Part of the TE Connectivity ENTRELEC SNK Series, this blue terminal combines substantial conductor capacity with a compact 12 mm pitch for efficient DIN rail panel construction.
The ZS25-BL accepts flexible and rigid stranded conductors from 0.5–25 mm², with rigid conductor capability extending to 3 AWG. Its screw clamp technology provides secure conductor retention, while the two-position, single-level feed-through configuration creates a straightforward connection between incoming and outgoing wiring.
With an IEC rated voltage of 1000 V and an IEC rated current of 76 A, the ZS25-BL is suitable for demanding industrial distribution applications, including installations requiring high-voltage capability. Its polyamide housing provides IP20 protection and a UL 94V-0 flammability rating, with an operating temperature range from -55 to +110 °C.
Feed-through terminal blocks provide a secure and organised method of joining incoming and outgoing conductors within control panels, distribution assemblies and industrial machinery. The TE Connectivity ZS25-BL provides this function for conductors up to 25 mm², using proven screw clamp technology to maintain a dependable electrical and mechanical connection.
Its combination of 76 A IEC current capacity, 1000 V IEC voltage rating and 12 mm modular spacing makes the ZS25-BL particularly suitable where higher-power conductors must be terminated without excessive DIN rail space. The blue housing also enables clear identification within colour-coded terminal assemblies.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | SNK Series |
| Model | ZS25-BL |
| Part number | 1SNK512020R0000 |
| Product type | Screw clamp terminal block |
| Terminal function | Feed-through |
| Terminal size | 25 mm² |
| Connection method | Screw clamp |
| Number of levels | 1 |
| Number of positions | 2 |
| Number of circuits | 1 |
| Gauge type | A6-B6 |
| Single flexible conductor capacity | 0.5–25 mm² |
| Single rigid stranded conductor capacity | 0.5–25 mm² / 24–3 AWG |
| Single insulated ferrule capacity | 0.5–16 mm² / 24–8 AWG |
| Single non-insulated ferrule capacity | 0.5–16 mm² / 24–4 AWG |
| Two flexible conductor capacity | 0.5–10 mm² |
| Two rigid stranded conductor capacity | 0.5–10 mm² / 20–10 AWG |
| Twin ferrule capacity | 0.5–10 mm² / 20–10 AWG |
| IEC rated current | 76 A |
| UL rated current | 100 A |
| CSA rated current | 100 A |
| IEC rated voltage | 1000 V |
| CSA rated voltage | 600 V |
| UL / CSA maximum main-circuit operating voltage | 600 V |
| Short-time withstand current (1 s) | 1920 A |
| IEC impulse withstand voltage | 8000 V |
| Maximum dielectric withstand voltage | 2200 V |
| Power loss | 2.4 W |
| Product spacing / width | 12 mm |
| Product height | 56.1 mm |
| Product length | 48.8 mm |
| Product depth | 48.8 mm |
| Product weight | 21.4 g |
| Wire stripping length | 13.5 mm |
| Tool size | 5.5 mm |
| Mounting type | DIN rail |
| DIN rail compatibility | TH35-7.5 / TH35-15 |
| Housing material | Polyamide |
| Colour | Blue |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Operating temperature range | -55 to +110 °C |
| Installation temperature range | -5 to +40 °C |
The ZS25-BL is a 25 mm² screw clamp feed-through terminal block used to create secure conductor-to-conductor connections in industrial control panels, power distribution equipment, machinery and other DIN rail assemblies.
The ZS25-BL accepts single flexible and rigid stranded conductors from 0.5–25 mm², with rigid stranded conductor capability extending from 24–3 AWG.
The ZS25-BL is rated at 76 A and 1000 V IEC, with 100 A UL and CSA current ratings and a maximum UL/CSA main-circuit operating voltage of 600 V.
The ZS25-BL has a compact product spacing of 12 mm, allowing conductors up to 25 mm² to be terminated within a space-efficient DIN rail assembly.
The ZS25-BL is designed for DIN rail mounting and is compatible with TH35-7.5 and TH35-15 mounting rails.
TE Connectivity ENTRELEC SNK Series feed-through terminal blocks provide panel builders, automation engineers and equipment manufacturers with robust screw clamp connections, high conductor capacity and space-efficient DIN rail installation for demanding industrial electrical 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...