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1SNK516021R0000 – ZS50-BL
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.
£3.68
Why Choose the TE Connectivity ZS50-BL Screw Clamp Feed-Through Terminal Block?
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.
Key Advantages
- Heavy-duty 50 mm² feed-through terminal block for high-current circuits.
- 150 A IEC current rating for demanding industrial power applications.
- 1,000 V IEC voltage rating provides excellent electrical capability.
- Secure screw clamp termination helps maintain dependable conductor retention.
- 16 mm pitch balances high conductor capacity with efficient DIN rail installation.
- Supports flexible and rigid stranded conductors up to 50 mm².
- Blue housing provides clear visual identification within organised terminal assemblies.
Key Features
- TE Connectivity ENTRELEC SNK Series.
- ZS50-BL feed-through terminal block.
- 2 connection positions.
- 1 circuit and 1 level.
- 16 mm product spacing.
- 150 A IEC rated current.
- 1,000 V IEC rated voltage.
- 140 A UL/CSA rated current.
- 1,000 V UL/CSA operating voltage.
- 8,000 V IEC impulse withstand voltage.
- 6,000 A short-time withstand current at 1 s.
- Blue polyamide housing.
- UL 94V-0 flammability rating.
- Compatible with TH35-7.5 and TH35-15 DIN rails.
Reliable High-Current Electrical Connectivity
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.
Typical Applications
- Industrial power distribution panels.
- Machine and equipment power connections.
- Motor control centres and industrial drives.
- Electrical switchgear and distribution cabinets.
- Factory automation and production equipment.
- Energy generation and infrastructure systems.
- High-current DIN rail terminal assemblies.
Technical Specifications
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| Number of Connection Points | 1 | |
|---|---|---|
| Product Series | TE SNK | |
| Connection | Spring clamp | |
| Terminal Type | Feed-through | |
| Number of Levels | 1 | |
| Colour | Blue | |
| 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 |
Frequently Asked Questions
What is the TE Connectivity ZS50-BL 1SNK516021R0000 used for?
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.
What conductor size does the ZS50-BL support?
The terminal block accepts flexible and rigid stranded conductors from 1–50 mm², with conductor sizes up to approximately 0 AWG.
What are the electrical ratings of 1SNK516021R0000?
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.
What colour is the ZS50-BL terminal block?
The ZS50-BL has a blue polyamide housing, enabling clear visual identification within organised terminal assemblies.
How is the ZS50-BL mounted?
The terminal block is designed for DIN rail mounting and is compatible with standard TH35-7.5 and TH35-15 rails.
Trusted by Industrial Panel Builders
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.
