EMAS C4CK is a 1 NC contact block for C Series control boxes rated at 4 A at 250 V AC in the AC-15 utilisation category for industrial control applications.
£3.43
The EMAS C4CK is a reliable normally closed (1 NC) contact block designed specifically for EMAS C Series control boxes. It provides the electrical switching element required behind compatible pushbuttons and control operators, making it suitable for industrial machinery, automation panels and operator control stations.
Designed for dependable industrial switching, the C4CK uses an AgNi contact material and is rated at 4 A at 250 V AC in the AC-15 utilisation category. Its robust construction provides a minimum mechanical life of 1,000,000 operations and a minimum electrical life of 100,000 operations.
The C4CK is intended for EMAS C Series control boxes and provides a single normally closed contact. With a rated insulation voltage of 300 V, impulse withstand voltage of 2.5 kV and an operating temperature range of -15 to +80 °C, it is engineered for reliable operation in demanding industrial control applications.
Normally closed contact blocks such as the EMAS C4CK provide an electrical contact that remains closed in its normal state and opens when the associated control operator is actuated. This makes the contact block suitable for stop functions and other industrial control circuits requiring normally closed switching.
The C4CK is designed specifically for EMAS C Series control boxes. Its high mechanical endurance, AgNi contacts and industrial electrical ratings make it a dependable component for machinery controls, automation equipment and operator stations.
| Manufacturer | EMAS |
|---|---|
| Series | C Series |
| Model | C4CK |
| Product type | Contact block for control boxes |
| Contact configuration | 1 NC |
| Rated operational current | 4 A at 250 V AC |
| Utilisation category | AC-15 |
| Rated insulation voltage | 300 V |
| Impulse withstand voltage | 2.5 kV |
| Dielectric strength, body-contact | 2,500 V AC |
| Dielectric strength, contact-contact | 1,500 V AC |
| Insulation resistance | 10 MΩ at 500 V DC |
| Contact material | AgNi |
| Cable section | 1.5–2.5 mm² |
| Screw torque | 1.5 Nm |
| Mechanical life | Minimum 1,000,000 operations |
| Electrical life | Minimum 100,000 operations |
| Mechanical operating frequency | 3,000 operations/hour |
| Electrical operating frequency | 1,200 operations/hour |
| Operating temperature | -15 to +80 °C |
| Pollution degree | 3 |
| Short-circuit breaking capacity | 1 kA |
The C4CK is a normally closed contact block designed for use with EMAS C Series control boxes in industrial control and automation applications.
The EMAS C4CK provides one normally closed (1 NC) contact.
The C4CK has a rated operational current of 4 A at 250 V AC in the AC-15 utilisation category.
The EMAS C4CK is rated for a minimum mechanical life of 1,000,000 operations.
The C4CK is specifically designed as a 1 NC contact block for EMAS C Series control boxes.
EMAS industrial control components provide dependable switching solutions for machinery, automation systems and operator control stations, with the C4CK offering a durable normally closed contact for compatible C Series control boxes.
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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...