Product Description

Siemens 5SU1344-7RC40 RCBO – 40A, 4-Pole, 30mA, Type A, C-Characteristic

The Siemens 5SU1344-7RC40 is a SENTRON / Betagard 5SU1 Residual Current Circuit Breaker with Overcurrent Protection (RCBO) designed to combine overload, short-circuit and residual-current protection in a single device. The exact product designation specifies 40 A, 4-pole, 7 modules, C characteristic, Type A and 30 mA residual-current sensitivity. Indian product listings confirm the same configuration and a 415 V AC rated voltage, while Siemens technical data for this product family specifies a 10 kA short-circuit breaking capacity.

Siemens 5SU1344-7RC40 RCBO

The 5SU1344-7RC40 belongs to the Siemens SENTRON / Betagard 5SU1 RCBO family. An RCBO combines overcurrent protection and residual-current protection in one integrated device.

It provides protection against:

• Overload

• Short circuit

• Residual or earth-leakage current

This integrated construction can simplify circuit-level protection compared with using separate MCB and RCCB devices.

The exact product listing confirms 40 A, 4-pole, 7 modules, C characteristic, Type A and 30 mA.

40 A Rated Current

The RCBO has a rated current of 40 A.

This makes it suitable for compatible three-phase circuits and feeders designed around a 40 A protective device.

The actual selection should consider:

• Connected load

• Cable ampacity

• Installation method

• Ambient conditions

• Prospective short-circuit current

• Protection coordination requirements

C Tripping Characteristic

The 5SU1344-7RC40 uses a C tripping characteristic.

The C curve is intended for compatible circuits where normal operation may involve moderate starting or inrush current.

Potential applications include:

• Pumps

• Fans

• Motors

• Control transformers

• Contactors

• Solenoids

• Industrial auxiliary equipment

• Selected machinery

The actual tripping characteristic should be selected according to the load's starting-current characteristics and protection-coordination requirements. The exact product listing confirms the C curve.

Type A Residual Current Protection

The device uses Type A residual-current protection.

Type A protection is designed to detect suitable AC residual currents as well as pulsating DC residual-current components. This makes it suitable for many modern electrical and electronic loads.

Potential applications include:

• Electronic power supplies

• Automation equipment

• Rectifier-based equipment

• Industrial control systems

• Modern machinery

• Commercial electronic equipment

The exact product is identified as Type A.

30 mA Residual Current Sensitivity

The 5SU1344-7RC40 has a rated residual operating current of 30 mA.

When the residual-current condition reaches the specified operating threshold, the RCBO disconnects the protected circuit.

The 30 mA sensitivity should be selected according to the complete electrical protection design and applicable installation requirements.

The exact product listing confirms 30 mA residual-current sensitivity.

4-Pole Configuration

The RCBO has 4 poles, making it suitable for compatible three-phase-plus-neutral electrical systems.

The four-pole arrangement allows the three phases and neutral to be incorporated into the circuit protection arrangement.

Typical applications include:

• Three-phase distribution boards

• Industrial feeder circuits

• PCC panels

• MCC panels

• Commercial electrical panels

• Machine power circuits

• Factory electrical systems

• Sub-distribution boards

The exact product is listed as 4-pole / 4P.

415 V AC Application

Indian product information identifies the exact 5SU1344-7RC40 as a 415 V AC device.

This makes it suitable for compatible three-phase low-voltage distribution systems where the system voltage and protection requirements match the device.

The actual installation should always be checked against the applicable Siemens technical documentation and electrical-system design.

10 kA Short-Circuit Breaking Capacity

The exact product listing specifies a 10 kA breaking capacity.

The prospective short-circuit current at the installation point should still be evaluated during system design, together with upstream protection and coordination requirements.

Because the device is an RCBO, its overcurrent function also provides short-circuit protection within its specified ratings.

Combined Overcurrent and Residual-Current Protection

The main advantage of the 5SU1344-7RC40 is its integrated protection arrangement.

A conventional installation may use:

MCB + RCCB

An RCBO combines these functions:

RCBO = Overload + Short Circuit + Residual Current Protection

This can simplify circuit-level protection and reduce the number of separate protection components.

7-Module Design

The product designation specifies 7 modules.

The Siemens 5SU1 4-pole construction uses approximately 126 mm physical width for this configuration, corresponding to 7 modular-width units in the technical documentation for the family. The 7-module designation refers to physical panel space and does not indicate a power rating.

Physical Dimensions

The technical information for the corresponding 4-pole 7-module 5SU1 construction specifies approximately:

• Height: 90 mm

• Width: 126 mm

• Depth: 70 mm

• Installation depth: 70 mm

• Modular width: 7 units

These dimensions are useful for panel builders when checking enclosure and DIN-rail space.

DIN-Rail / Modular Installation

The Siemens 5SU1 RCBO family is designed for modular electrical installation.

The 5SU1344-7RC40 can be integrated into suitable:

• Distribution boards

• Industrial control panels

• PCC panels

• MCC panels

• Machine panels

• Commercial switchboards

• Factory electrical enclosures

Panel builders should verify available space and compatible accessories before installation.

Neutral Conductor Switching

The corresponding Siemens technical construction specifies neutral conductor switching for the 4-pole RCBO arrangement.

This supports use in compatible three-phase-plus-neutral systems.

Flexible Power-Supply Connection

The Siemens technical data for the corresponding 4-pole 7-module construction specifies that the power supply can be connected from either the top or bottom.

This provides flexibility during electrical-panel wiring.

Overload Protection

The RCBO's overcurrent section protects the connected circuit against sustained excessive current caused by overload.

The 40 A rating should be coordinated with:

• Cable ampacity

• Connected load

• Installation method

• Ambient temperature

• Protection-coordination requirements

Short-Circuit Protection

The RCBO also provides integrated short-circuit protection.

Its 10 kA breaking capacity should be evaluated against the prospective fault current at the installation point.

Residual-Current Protection

Residual current occurs when part of the electrical current flows through an unintended path, such as leakage toward earth.

The RCBO monitors the residual-current condition and disconnects the protected circuit when the specified 30 mA threshold is reached.

This adds residual-current protection to the integrated overload and short-circuit functions.

C-Curve Industrial Applications

The C characteristic can be suitable for compatible loads with moderate starting or inrush current.

Potential applications include:

• Pumps

• Fans

• Motors

• Contactors

• Solenoids

• Control transformers

• Industrial machinery

• Automation equipment

The actual application should be evaluated according to the load's starting characteristics and protection coordination.

Type A Applications with Electronic Loads

Type A protection is useful for compatible installations where residual currents may include pulsating DC components.

Potential applications include:

• Automation systems

• Electronic control panels

• Switching power supplies

• Rectifier-based equipment

• Industrial instrumentation

• Modern electrical machinery

The connected equipment's leakage-current waveform should be checked before final selection.

Three-Phase Distribution Applications

The 5SU1344-7RC40 can be considered for compatible:

• Industrial distribution boards

• Three-phase equipment feeders

• PCC panels

• MCC panels

• Machine power circuits

• Commercial switchboards

• Factory electrical systems

• Sub-distribution boards

• Building electrical panels

Protection Coordination

A typical arrangement can be:

Incoming Supply → RCBO → Protected Three-Phase Load

The complete protection design should consider:

• Prospective short-circuit current

• Cable capacity

• Load current

• C-curve characteristics

• 30 mA residual-current sensitivity

• Upstream protection

• Applicable electrical standards

Maintenance and Testing

RCBOs should be included in the electrical installation's regular inspection and testing program.

The test function should be operated according to Siemens' instructions and applicable maintenance requirements to verify the residual-current protection function.

Regular testing helps confirm that the protection mechanism remains operational.

Installation Considerations

Before selecting the 5SU1344-7RC40, verify:

• Rated current: 40 A

• Residual-current sensitivity: 30 mA

• Residual-current type: Type A

• Tripping characteristic: C

• Pole configuration: 4-pole

• Rated voltage: 415 V AC

• Short-circuit capacity: 10 kA

• Required panel space: 7 modules

• Cable size and installation method

• Load starting characteristics

• Applicable national electrical regulations

Difference from D-Characteristic Version

The 5SU1344-8RC40 is the corresponding 40 A, 4-pole, 7-module, Type A, 30 mA configuration with a D characteristic.

Therefore:

5SU1344-7RC40 → C characteristic

5SU1344-8RC40 → D characteristic

The main difference is the overcurrent tripping characteristic. The D curve is intended for compatible loads with higher starting or inrush currents.

Difference from Type AC Version

The 5SU1344-1RC40 is a 40 A, 4-pole, 8-module, C-characteristic, Type AC, 30 mA RCBO.

Therefore:

5SU1344-7RC40 → Type A, 40 A, 30 mA, 7 modules

5SU1344-1RC40 → Type AC, 40 A, 30 mA, 8 modules

The residual-current type and module configuration are different.

Difference from 100 mA Type A Version

The 5SU1444-7RC40 is the corresponding Type A, C-characteristic configuration with 100 mA residual-current sensitivity.

Therefore:

5SU1344-7RC40 → Type A, 40 A, 30 mA

5SU1444-7RC40 → Type A, 40 A, 100 mA

The main difference is residual-current sensitivity.

Difference from 300 mA Type A Version

A 300 mA Type A RCBO in the 5SU1 family has a different residual-current sensitivity from this model.

The 5SU1344-7RC40 is specifically the 30 mA configuration, so a 300 mA model should not be treated as a direct replacement without checking the protection requirement.

Difference from 63 A Version

The 5SU1344-7RC63 is the corresponding 63 A, 4-pole, 7-module, Type A, 30 mA, C-characteristic model.

Therefore:

5SU1344-7RC40 → 40 A

5SU1344-7RC63 → 63 A

The principal difference is the rated current.

Difference from 32 A Version

The 5SU1344-7RC32 is the lower-rated variant in the same general Type A, C-characteristic, 30 mA family.

The 5SU1344-7RC40 should be selected when the protected circuit requires a 40 A rated protective device.

Difference from 2-Pole RCBO

The 5SU1354 family contains 2-pole RCBOs for compatible single-phase applications.

The 5SU1344-7RC40 is a 4-pole RCBO intended for compatible three-phase-plus-neutral systems, so pole configuration must be checked carefully before selecting an alternative.

Difference Between RCBO and RCCB

The 5SU1344-7RC40 is an RCBO.

An RCCB primarily provides residual-current protection and normally requires separate overcurrent protection.

An RCBO combines:

Residual-current protection + overload protection + short-circuit protection

in one device.

Suitable for Electrical Panel Builders and Industrial Buyers

The Siemens 5SU1344-7RC40 is relevant for:

• Electrical panel builders

• Industrial buyers

• Electrical contractors

• OEMs

• Machine builders

• Factory maintenance teams

• Commercial electrical contractors

• Electrical distributors

• Automation system integrators

• Electrical product dealers

For SB Smart, the product is positioned as a Siemens SENTRON / Betagard 5SU1 Type A RCBO for 40 A three-phase circuit protection with C characteristic and 30 mA sensitivity.

Technical Specification

The product listing confirms 40 A, 4-pole, 7 modules, C characteristic, Type A and 30 mA, while the corresponding Siemens 5SU1 technical construction confirms the 7-module dimensions and 10 kA protection class.

Key Features

• Siemens SENTRON / Betagard 5SU1 RCBO

• Article number 5SU1344-7RC40

• 40 A rated current

• 4-pole configuration

• 7-module format

• Type A residual-current protection

• 30 mA residual-current sensitivity

• C tripping characteristic

• 415 V AC rated voltage

• 50 Hz operating frequency

• 10 kA short-circuit breaking capacity

• 15 kA IEC 60947-2 switching capacity

• 10 kA rated residual switching capacity

• 440 V insulation voltage

• 4 kV surge-voltage resistance

• Neutral conductor switching

• Top or bottom power-supply connection

• Integrated overload and short-circuit protection

• Integrated residual-current protection

• Suitable for compatible three-phase-plus-neutral circuits

Benefits

• Combined protection: Integrates overload, short-circuit and residual-current protection in one device.

• 40 A rating: Suitable for compatible three-phase circuits and feeders.

• Type A protection: Suitable where residual currents may include pulsating DC components.

• 30 mA sensitivity: Provides residual-current protection at the specified operating threshold.

• C characteristic: Suitable for compatible loads with moderate inrush current.

• 4-pole construction: Suitable for compatible three-phase-plus-neutral systems.

• 7-module format: Provides a modular four-pole protection solution.

• 10 kA breaking capacity: Provides substantial short-circuit interruption capability within specified conditions.

• Neutral switching: Supports the four-pole circuit arrangement.

• Flexible supply connection: Power can be connected from the top or bottom.

Why Choose Siemens 5SU1344-7RC40?

The Siemens 5SU1344-7RC40 combines 40 A overcurrent protection, C-curve tripping and Type A 30 mA residual-current protection in a 4-pole, 7-module RCBO.

The exact product listing confirms 40 A, 4-pole, 7 modules, C characteristic, Type A and 30 mA, with 10 kA breaking capacity.

For SB Smart, this product is best presented as a Siemens Betagard/SENTRON 5SU1 Type A RCBO for 40 A, 30 mA three-phase circuit protection with C characteristic across India.

Delivery Across India

SB Smart supplies Siemens SENTRON/Betagard RCBOs, RCCBs and industrial electrical protection products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and other major Indian cities.

Major delivery locations include:

• Faridabad

• Delhi

• Gurgaon/Gurugram

• Delhi NCR

• Noida

• Greater Noida

• Haryana

• Punjab

• Mumbai

• Pune

• Ahmedabad

• Bengaluru

• Hyderabad

• Chennai

• Kolkata

• Jaipur

• Chandigarh

• Lucknow

• Indore

• Surat

• Vadodara

• Nagpur

• Coimbatore

• And other major cities across India

Frequently Asked Questions

1. What is Siemens 5SU1344-7RC40?

The 5SU1344-7RC40 is a Siemens SENTRON / Betagard 5SU1 RCBO rated at 40 A, with 4 poles, 7 modules, C characteristic, Type A residual-current protection and 30 mA sensitivity.

2. Is this an RCBO or RCCB?

It is an RCBO, meaning it combines residual-current and overcurrent protection.

3. What is the rated current?

The rated current is 40 A.

4. What is the residual-current sensitivity?

The rated residual operating current is 30 mA.

5. What type of residual-current protection does it use?

It uses Type A residual-current protection.

6. What is the tripping characteristic?

It has a C tripping characteristic.

7. How many poles does it have?

It has 4 poles, suitable for compatible three-phase-plus-neutral applications.

8. What is the module width?

The product is specified as 7 modules, with approximately 126 mm physical width in the corresponding Siemens 5SU1 construction.

9. What is the rated voltage?

Indian product information identifies the exact article as 415 V AC.

10. What is the short-circuit breaking capacity?

The product is specified with a 10 kA breaking capacity.

11. What is the difference between 5SU1344-7RC40 and 5SU1344-8RC40?

5SU1344-7RC40: 40 A, 4-pole, Type A, 30 mA, C characteristic.

5SU1344-8RC40: 40 A, 4-pole, Type A, 30 mA, D characteristic.

The main difference is the overcurrent tripping characteristic.

12. What is the difference between 5SU1344-7RC40 and 5SU1344-1RC40?

5SU1344-7RC40: Type A, 40 A, 30 mA, C characteristic, 7 modules.

5SU1344-1RC40: Type AC, 40 A, 30 mA, C characteristic, 8 modules.

The main differences are the residual-current type and module configuration.

13. What is the difference between 5SU1344-7RC40 and 5SU1344-7RC63?

5SU1344-7RC40: 40 A, Type A, 30 mA, C characteristic.

5SU1344-7RC63: 63 A, Type A, 30 mA, C characteristic.

The main difference is the rated current.

14. Where can I buy Siemens 5SU1344-7RC40 in India?

SB Smart supplies Siemens SENTRON/Betagard 5SU1 RCBOs and industrial electrical protection products in India for panel builders, electrical contractors, OEMs, industrial buyers, machine builders and maintenance requirements.