The Siemens 3RT1966-4G is a genuine SIRIUS box terminal block designed as an accessory for compatible 3RT1 power contactors and related SIRIUS devices. It is suitable for S10 and S12 size applications and supports large conductor cross-sections up to 240 mm² for the main contacts. Siemens identifies the product as a 3RT19 series box terminal and currently lists it as an Active Product.
The 3RT1966-4G provides a robust connection solution for high-current power contactor installations where larger cable sizes are required. It can accommodate solid or stranded main conductors from 2 × 70 mm² up to 2 × 240 mm², while finely stranded conductors with core-end processing can be connected from 2 × 95 mm² up to 2 × 185 mm².
The terminal block is suitable for industrial motor-control panels, electrical control cabinets, motor starters, factory automation systems, and other applications using compatible Siemens SIRIUS contactors.
Brand: Siemens
Product Family: SIRIUS
Model: 3RT1966-4G
Product Type: Box Terminal Block
Series: 3RT19
Compatible Equipment: 3RT1, 3RB2, 3RW507
Contactor Size: S10 / S12
Main Conductor Capacity: Up to 240 mm²
Main Conductors: 2 × 70 to 2 × 240 mm² solid/stranded
Finely Stranded Conductors: 2 × 95 to 2 × 185 mm² with core-end processing
AWG Main Conductors: 2/0 to 500 kcmil
Auxiliary Conductor Connection: Supported
Net Weight: Approx. 0.68 kg
Application: Power contactor and industrial switching connections
Product Status: Active Product
The Siemens 3RT1966-4G is suitable for:
Siemens SIRIUS 3RT1 contactors
High-current motor-control panels
Industrial control cabinets
Motor starter systems
Factory automation
Electrical distribution and switching systems
OEM control panels
Industrial machinery
Contactor replacement and maintenance
Large cable connection applications
Genuine Siemens SIRIUS accessory
Supports large power conductors up to 240 mm²
Suitable for S10 and S12-size applications
Provides a secure connection for high-current contactor circuits
Supports both solid and stranded conductors
Compatible with finely stranded conductors using appropriate core-end processing
Suitable for industrial motor-control applications
Helps simplify high-current cable termination
Designed for compatible Siemens SIRIUS equipment
The Siemens SIRIUS 3RT1966-4G is designed for applications requiring a high-capacity box terminal block for compatible SIRIUS equipment. Its ability to accommodate main conductors up to 2 × 240 mm² makes it suitable for larger industrial switching and motor-control installations.
Siemens specifies the 3RT1966-4G for 3RT1, 3RB2 and 3RW507 equipment, while Siemens CAD documentation identifies it as a box terminal block for S10/S12 contactor applications.
At SB Smart, Faridabad, we supply genuine Siemens SIRIUS contactors, terminal blocks, contactor accessories, replacement contacts, thermal overload relays, motor protection devices, soft starters, MCCBs, MCBs, and industrial automation products with GST billing, technical assistance, bulk-order support, secure packaging, and delivery across India.
Q1. What is Siemens 3RT1966-4G?
It is a Siemens SIRIUS box terminal block used with compatible 3RT1 and related SIRIUS equipment.
Q2. Which products is 3RT1966-4G compatible with?
Siemens specifies it for 3RT1, 3RB2 and 3RW507 applications.
Q3. What conductor size can it accommodate?
For solid or stranded main conductors, it supports 2 × 70 mm² to 2 × 240 mm². Finely stranded conductors with core-end processing can be 2 × 95 mm² to 2 × 185 mm².
Q4. What is the maximum AWG size?
The specified main-contact range is 2/0 to 500 kcmil.
Q5. What contactor sizes is it intended for?
The 3RT1966-4G is associated with S10 and S12-size SIRIUS contactor applications.
Q6. Is 3RT1966-4G a complete contactor?
No. It is an accessory box terminal block, not a complete power contactor.
Q7. What is the product weight?
The current Siemens data lists a net weight of approximately 0.68 kg.
Q8. Where can I buy Siemens 3RT1966-4G in India?
SB Smart, Faridabad supplies Siemens SIRIUS contactor accessories and industrial electrical products with GST billing, technical assistance, bulk-order support, and delivery across India.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS |
| Model Number | 3RT1966-4G |
| Product Type | Box Terminal Block |
| Compatibility | 3RT1 & 3RT2 Contactors |
| Contactor Configuration | 3 Pole |
| Function | Cable Connection & Termination |
| Installation Type | Contactor Accessory |
| Application | Motor Control & Power Distribution |
| Usage | Industrial Automation Systems |
| Construction | Industrial Duty Terminal Block |
| Brand | Siemens |
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