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C4HS11 IMO Auxiliary Contact Block Side Mount, 1 Normally Open
IMO C4HS11 is a left-hand side-mounted 1NO + 1NC auxiliary contact block for C4/32, C4/63 and C4/100 motor circuit breakers, rated at 6 A at 24 V AC under AC-15, 4 A at 240 V AC under AC-15 and 10 A at 240 V AC under AC-1.
£7.87
Why Choose the IMO C4HS11 Auxiliary Contact Block?
The IMO C4HS11 is a left-hand side-mounted auxiliary contact block designed for compatible IMO C4 motor circuit breakers. Featuring 1 normally open (1NO) and 1 normally closed (1NC) contact, it provides additional switching contacts for signalling, monitoring and control functions within industrial motor protection systems.
Designed specifically for the IMO C4/32, C4/63 and C4/100 motor circuit breaker ranges, the C4HS11 attaches to the left-hand side of the circuit breaker. Up to two side-mounted auxiliary contact blocks can be fitted per circuit breaker, except on C4/63R models, giving panel designers flexibility when additional auxiliary contacts are required.
The C4HS11 auxiliary contacts are rated at 6 A at 24 V AC under AC-15, 4 A at 240 V AC under AC-15 and 10 A at 240 V AC under AC-1. These ratings make the contact block suitable for appropriately rated industrial control and indication circuits associated with machinery, motor starters and automation equipment.
Key Advantages
- Provides 1NO + 1NC auxiliary contacts for flexible signalling and control.
- Compatible with IMO C4/32, C4/63 and C4/100 motor circuit breakers.
- Left-hand side mounting provides a practical alternative to top-mounted auxiliary contacts.
- Allows circuit breaker status to be incorporated into external control and indication circuits.
- Defined AC-15 and AC-1 operational current ratings simplify control-circuit specification.
- Up to two side-mounted auxiliary blocks can be used per compatible circuit breaker, except C4/63R models.
Key Features
- IMO C4 motor circuit breaker accessory.
- Left-hand side-mounted auxiliary contact block.
- 1 normally open (1NO) contact.
- 1 normally closed (1NC) contact.
- AC-15 rating of 6 A at 24 V AC.
- AC-15 rating of 4 A at 240 V AC.
- AC-1 rating of 10 A at 240 V AC.
- Compatible with C4/32, C4/63 and C4/100 motor circuit breakers.
Side-Mounted Signalling for Motor Protection Systems
Auxiliary contacts allow the operating state of a motor circuit breaker to be incorporated into a separate control or signalling circuit. With one normally open and one normally closed contact, the IMO C4HS11 gives control-system designers two complementary contact states for applications such as remote indication, electrical interlocking and automation signalling.
The side-mounted configuration is particularly useful when additional auxiliary functionality is required alongside a compatible C4 motor circuit breaker. With operational ratings defined for both AC-15 and AC-1 utilisation categories, the C4HS11 can be integrated into appropriately rated industrial control circuits while maintaining a coordinated C4 motor protection assembly.
Typical Applications
- Motor circuit breaker status indication.
- Industrial motor starter assemblies.
- Electrical interlocking circuits.
- Machinery control panels.
- PLC and automation signalling circuits.
- Pump, fan and conveyor control systems.
Technical Specifications
| Manufacturer | IMO Precision Controls |
|---|---|
| Series | C4 Motor Circuit Breaker Accessories |
| Model | C4HS11 |
| Product type | Auxiliary contact block |
| Mounting position | Left-hand side |
| Contact configuration | 1NO + 1NC |
| Normally open contacts | 1 |
| Normally closed contacts | 1 |
| Rated operational current, AC-15 at 24 V | 6 A |
| Rated operational current, AC-15 at 240 V | 4 A |
| Rated operational current, AC-1 at 240 V | 10 A |
| For use with | IMO C4/32, C4/63 and C4/100 motor circuit breakers |
| Maximum quantity | Up to 2 side-mounted auxiliary contact blocks per circuit breaker, except C4/63R |
| Busbar installation note | Side-mounted auxiliary contacts cannot be fitted next to another breaker on a busbar |
Frequently Asked Questions
What is the IMO C4HS11 used for?
The C4HS11 is a side-mounted auxiliary contact block that adds one normally open and one normally closed contact to a compatible IMO C4 motor circuit breaker for signalling, monitoring and control functions.
What contacts does the IMO C4HS11 provide?
The C4HS11 provides 1 normally open (1NO) and 1 normally closed (1NC) auxiliary contact.
Which motor circuit breakers are compatible with the C4HS11?
The IMO C4HS11 is designed for use with C4/32, C4/63 and C4/100 motor circuit breakers.
Where is the IMO C4HS11 mounted?
The C4HS11 mounts on the left-hand side of a compatible C4 motor circuit breaker. Up to two side-mounted auxiliary contact blocks can be fitted per circuit breaker, except on C4/63R models.
What are the contact ratings of the IMO C4HS11?
The C4HS11 is rated at 6 A at 24 V AC under AC-15, 4 A at 240 V AC under AC-15 and 10 A at 240 V AC under AC-1.
Flexible Motor Control Accessories from IMO
IMO C4 auxiliary contact blocks extend compatible motor circuit breakers with additional signalling and control contacts, helping panel builders integrate motor protection devices into coordinated industrial control, monitoring and automation systems.
