RS Better World
Siemens SENTRON 5SY4 Miniature Circuit Breaker, 3-Pole, 40A, Type C, 400V ac AC, 60 V dc DC, 10 kA Breaking Capacity
- RS Stock No.:
- 124-3177
- Distrelec Article No.:
- 300-24-120
- Mfr. Part No.:
- 5SY4340-7
- Manufacturer:
- Siemens
Subtotal (1 unit)*
MYR824.55
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- Plus 1 unit(s) shipping from 09 November 2026
- Plus 9 unit(s) shipping from 18 November 2026
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Units | Per Unit |
|---|---|
| 1 + | MYR824.55 |
*price indicative
Our Better World range features products that make it easy for you to make a greener product choice you can trust.
Learn more about RS Better World products
- RS Stock No.:
- 124-3177
- Distrelec Article No.:
- 300-24-120
- Mfr. Part No.:
- 5SY4340-7
- Manufacturer:
- Siemens
Specifications
Technical data sheets
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Number of Poles | 3 | |
| Product Type | Miniature Circuit Breaker | |
| Current Rating | 40A | |
| Tripping Characteristics | Type C | |
| Rated AC Voltage | 400V ac | |
| Rated DC Voltage | 60V dc | |
| Mount Type | DIN Rail | |
| Breaking Capacity | 10kA | |
| Range | SENTRON | |
| Series | 5SY4 | |
| Terminal Type | Combined Terminal | |
| IP Rating | IP20 | |
| Width | 54mm | |
| Standards/Approvals | IEC/EN 60947-2/UL1077, IEC/EN 60898-1 | |
| Height | 90mm | |
| Depth | 76mm | |
| Better World Claim | Extended Product Life | |
| Better World Product | Yes | |
| Select all | ||
|---|---|---|
Brand Siemens | ||
Number of Poles 3 | ||
Product Type Miniature Circuit Breaker | ||
Current Rating 40A | ||
Tripping Characteristics Type C | ||
Rated AC Voltage 400V ac | ||
Rated DC Voltage 60V dc | ||
Mount Type DIN Rail | ||
Breaking Capacity 10kA | ||
Range SENTRON | ||
Series 5SY4 | ||
Terminal Type Combined Terminal | ||
IP Rating IP20 | ||
Width 54mm | ||
Standards/Approvals IEC/EN 60947-2/UL1077, IEC/EN 60898-1 | ||
Height 90mm | ||
Depth 76mm | ||
Better World Claim Extended Product Life | ||
Better World Product Yes | ||
- COO (Country of Origin):
- DE
Siemens 5SY4 Series Miniature Circuit Breaker, 40A Current, 400V ac Rated Voltage - 5SY4340-7
This miniature circuit breaker is a three-pole protective device designed for DIN-rail distribution systems in industrial and infrastructure environments. It operates on AC supplies up to 400 V and on DC supplies up to 60 V, providing overcurrent and short-circuit interruption with a Type C tripping characteristic. The unit is intended for installation where IP20 touch protection and combined top/bottom terminals are required, and it meets relevant IEC/EN and UL standards for low-voltage switching devices.
Features and Benefits:
• 10 kA breaking capacity delivers defined fault interruption performance
• Type C characteristic protects moderate inrush loads and circuits
• 3-pole construction enables simultaneous multi-phase disconnection
• Combined terminals permit flexible TOP and bottom conductor connection
• DIN-rail mounting allows straightforward panel integration
• Type C characteristic protects moderate inrush loads and circuits
• 3-pole construction enables simultaneous multi-phase disconnection
• Combined terminals permit flexible TOP and bottom conductor connection
• DIN-rail mounting allows straightforward panel integration
Applications
• Suitable for three-phase distribution boards in industrial facilities
• Used for motor feeder protection with moderate starting currents
• Ideal for infrastructure electrical panels requiring modular protection
• Can be used for DC control circuits up to 60 V where isolation is needed
• Used with sub-distribution units requiring UL1077 recognition
• Used for motor feeder protection with moderate starting currents
• Ideal for infrastructure electrical panels requiring modular protection
• Can be used for DC control circuits up to 60 V where isolation is needed
• Used with sub-distribution units requiring UL1077 recognition
What is the mechanical lifecycle of the device?
It typically endures 10,000 operating cycles under mechanical operation.
What conductor sizes can be connected to its terminals?
Solid and stranded conductors from 0.75 mm² up to 35 mm² can be fitted, and finely stranded conductors with ferrules up to 25 mm².
How does ambient temperature affect current-carrying capability?
Rated current is 40 A
operational current reduces with temperature, for example to 38.42 A at 40 °C and to 35.04 A at 60 °C.
Which standards and approvals does it comply with?
It conforms to IEC/EN 60898-1 and IEC/EN 60947-2 and holds UL1077 recognition.
What are the tightening torque requirements for the screw terminals?
Terminals require 2.5 N·m to 3.5 N·m torque, equivalent to 22 lbf·in to 31 lbf·in.
Related links
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 15 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 5 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity
- Siemens SENTRON 5SY4 Miniature Circuit Breaker 40A 400V ac AC 10 kA Breaking Capacity