TE Connectivity ZS50-BL 1SNK516021R0000 is a blue ENTRELEC SNK high-current screw clamp feed-through terminal block with 16 mm spacing, conductor capacity up to 50 mm², a 150 A IEC current rating and a 1,000 V IEC voltage rating.
£5.66
The TE Connectivity ZS50-BL 1SNK516021R0000 is a heavy-duty blue screw clamp feed-through terminal block designed for reliable high-current conductor connections in industrial control panels, power distribution equipment and electrical installations. Part of the TE Connectivity ENTRELEC SNK Series, it combines robust screw clamp technology with DIN rail mounting for secure, maintainable power connections.
The ZS50-BL provides a two-position, single-level feed-through configuration with a 16 mm pitch. Designed for conductors up to 50 mm², it is particularly well suited to higher-current circuits where substantial conductor capacity and dependable mechanical retention are required.
With an IEC current rating of 150 A and IEC voltage rating of 1,000 V, the ZS50-BL provides excellent electrical performance for demanding industrial applications. Its blue polyamide housing, 8,000 V impulse withstand rating and wide -55 to +110 °C operating temperature range support reliable service in professional electrical installations.
High-capacity feed-through terminal blocks provide a secure and serviceable connection point for substantial conductors within industrial power and control systems. The TE Connectivity ZS50-BL uses robust screw clamp technology to create strong mechanical conductor retention and stable electrical contact for high-current circuits.
Its 50 mm² conductor capacity, 150 A IEC rating and 1,000 V voltage capability make the ZS50-BL particularly suitable for power distribution and equipment wiring. DIN rail mounting also allows the terminal to be integrated alongside other ENTRELEC SNK components to create organised and accessible terminal assemblies.
| Manufacturer | TE Connectivity |
|---|---|
| Series | ENTRELEC SNK |
| Model | ZS50-BL |
| Part number | 1SNK516021R0000 |
| Product type | Screw clamp terminal block |
| Block function | Feed-through |
| Connection type | Screw clamp |
| Number of circuits | 1 |
| Number of positions | 2 |
| Number of levels | 1 |
| Gauge type | Dia.11 |
| Colour | Blue |
| Product spacing | 16 mm |
| Rated current (IEC) | 150 A |
| Rated voltage (IEC) | 1,000 V |
| Rated current (UL) | 140 A |
| Rated current (CSA) | 140 A |
| Operating voltage (UL/CSA) | 1,000 V |
| Impulse withstand voltage (IEC) | 8,000 V |
| Dielectric withstand voltage | 2,200 V |
| Short-time withstand current at 1 s | 6,000 A |
| Power loss | 4.8 W |
| Flexible conductor capacity | 1–50 mm² |
| Rigid stranded conductor capacity | 1–50 mm² |
| Insulated ferrule capacity | 1–50 mm² |
| Non-insulated ferrule capacity | 1–50 mm² |
| Two flexible conductors per clamp | 1–25 mm² |
| Two rigid stranded conductors per clamp | 1–25 mm² |
| Twin ferrule capacity | 1–16 mm² |
| Conductor range | Up to 0 AWG |
| Wire stripping length | 17 mm |
| Tool size | 6.5 mm |
| Housing material | Polyamide |
| Flammability rating | UL 94V-0 |
| Mounting type | DIN rail |
| DIN rail compatibility | TH35-7.5 / TH35-15 |
| Dimensions (H × W × D) | 63.6 × 16 × 60.2 mm |
| Product weight | 52.9 g |
| Installation temperature range | -5 to +40 °C |
| Operating temperature range | -55 to +110 °C |
It is a high-current feed-through screw clamp terminal block used to connect substantial power conductors in industrial control, distribution and equipment wiring systems.
The terminal block accepts flexible and rigid stranded conductors from 1–50 mm², with conductor sizes up to approximately 0 AWG.
The ZS50-BL has an IEC current rating of 150 A and an IEC voltage rating of 1,000 V, with a short-time withstand current of 6,000 A for 1 s.
The ZS50-BL has a blue polyamide housing, enabling clear visual identification within organised terminal assemblies.
The terminal block is designed for DIN rail mounting and is compatible with standard TH35-7.5 and TH35-15 rails.
TE Connectivity ENTRELEC SNK screw clamp terminal blocks provide dependable industrial electrical connectivity, combining secure conductor termination, high electrical ratings and practical DIN rail installation for power distribution and control 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...