The Siemens 3RT1956-1CD00 is a genuine SIRIUS surge suppressor designed for compatible 3RT1 power contactors in S6, S10 and S12 sizes. This accessory uses an RC element to suppress voltage surges generated during contactor coil switching, helping reduce electrical interference and protect the control circuit. Siemens specifies the unit for 127–240 V AC control voltage at 50/60 Hz and 150–250 V DC control voltage.
The 3RT1956-1CD00 surge suppressor features a screw-terminal connection and is suitable for 3RT1.5, 3RT1.6 and 3RT1.7 contactors. It is part of the Siemens SIRIUS 3RT19 accessory range and is listed by Siemens as an Active Product.
This Siemens contactor surge suppressor is suitable for industrial motor control panels, electrical control cabinets, automation systems, machine control equipment, motor starters and other applications where reliable coil surge suppression is required.
Brand: Siemens
Product Family: SIRIUS
Part Number: 3RT1956-1CD00
Product Type: Surge Suppressor
Suppressor Design: RC Element
Suitable Contactor Sizes: S6, S10, S12
Compatible Contactors: 3RT1.5, 3RT1.6, 3RT1.7
Control Supply: AC/DC
AC Voltage: 127–240 V
DC Voltage: 150–250 V
AC Frequency: 50/60 Hz
Connection Type: Screw Terminal
Product Series: 3RT19
Net Weight: Approx. 31 g
Approvals: CE / UL / CSA
Product Status: Active Product
The Siemens 3RT1956-1CD00 RC surge suppressor is suitable for:
Siemens SIRIUS power contactors
3RT1 contactor assemblies
Industrial motor control panels
Electrical control panels
Motor starter systems
Industrial automation systems
Machine control cabinets
Factory automation equipment
OEM control panels
Contactor coil protection
Industrial switching systems
Electrical maintenance and retrofit applications
Helps suppress switching voltage surges from contactor coils.
Helps reduce electrical interference in control circuits.
Suitable for AC and DC control supplies within the specified ranges.
Supports 127–240 V AC operation.
Supports 150–250 V DC operation.
Designed for S6, S10 and S12 SIRIUS contactors.
Compact RC-element construction.
Screw-terminal connection for compatible applications.
Genuine Siemens SIRIUS accessory.
Suitable for industrial automation and motor-control applications.
Helps improve the operational reliability of contactor control circuits.
The Siemens SIRIUS 3RT1956-1CD00 is designed for applications where contactor coil surge suppression is required. Its RC-element design helps limit voltage transients generated when a contactor coil is switched off, reducing potential electrical disturbance in the surrounding control circuit.
Siemens specifies the accessory for 3RT1.5, 3RT1.6 and 3RT1.7 contactors in S6, S10 and S12 sizes. The device accepts 127–240 V AC at both 50 Hz and 60 Hz, as well as 150–250 V DC.
For industrial applications, the accessory can be particularly useful in motor control, industrial automation, machine control, electrical panels, OEM equipment and factory switching systems where contactors are frequently operated.
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Q1. What is Siemens 3RT1956-1CD00?
The 3RT1956-1CD00 is a Siemens SIRIUS RC-element surge suppressor for compatible 3RT1 contactors.
Q2. Which contactors are compatible with this surge suppressor?
It is suitable for 3RT1.5, 3RT1.6 and 3RT1.7 contactors.
Q3. Which contactor sizes does it support?
It is designed for S6, S10 and S12 contactor sizes.
Q4. What AC voltage does it support?
The specified AC control voltage range is 127–240 V AC at 50/60 Hz.
Q5. What DC voltage does it support?
The specified DC control voltage range is 150–250 V DC.
Q6. What type of surge suppressor is 3RT1956-1CD00?
It is an RC-element surge suppressor.
Q7. What is the connection type?
The product uses a screw-terminal connection.
Q8. What is the purpose of an RC surge suppressor on a contactor?
It helps suppress voltage transients produced by contactor coil switching and can reduce electrical interference in the control circuit.
Q9. Is 3RT1956-1CD00 suitable for AC and DC coils?
Yes. Siemens specifies AC/DC control-supply compatibility, within the stated voltage ranges.
Q10. Is 3RT1956-1CD00 a complete contactor?
No. It is an accessory surge suppressor for compatible Siemens SIRIUS contactors.
Q11. What is the weight of the product?
The Siemens datasheet lists a net weight of approximately 31 g.
Q12. What approvals does the product have?
The Siemens datasheet specifies CE, UL and CSA suitability approvals.
Q13. Which product family does it belong to?
It belongs to the Siemens SIRIUS family and 3RT19 product type.
Q14. Can it be used in industrial motor-control panels?
Yes. It is designed as an accessory for compatible SIRIUS contactors commonly used in industrial motor-control and automation applications.
Q15. Is it suitable for S6 contactors?
Yes. Siemens specifies compatibility with S6-size 3RT1 contactors.
Q16. Is it suitable for S10 and S12 contactors?
Yes. The Siemens product description specifically lists S6, S10 and S12.
Q17. Is Siemens 3RT1956-1CD00 an active product?
Yes. Siemens Industry Mall currently lists the product lifecycle as PM300: Active Product.
Q18. Where can I buy Siemens 3RT1956-1CD00 in India?
The Siemens SIRIUS 3RT1956-1CD00 surge suppressor can be sourced from industrial electrical and automation suppliers such as SB Smart, subject to current stock and availability.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS |
| Model Number | 3RT1956-1CD00 |
| Product Type | Surge Suppressor (RC Element) |
| Compatibility | 3RT1 & 3RT2 Contactors |
| Suitable Frame Sizes | S6, S10, S12 |
| Control Voltage (AC) | 127–240V AC |
| Control Voltage (DC) | 150–250V DC |
| Connection Type | Screw Terminal |
| Function | Coil Surge Suppression |
| Application | Control Circuit Protection |
| Installation Type | Contactor Accessory |
| Brand | Siemens |
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