Product Description

Siemens 5SU1344-8RC63 RCBO – 63A, 4-Pole, 30mA, Type A, D-Characteristic

The Siemens 5SU1344-8RC63 is a SENTRON / Betagard 5SU1 Residual Current Circuit Breaker with Overcurrent Protection (RCBO) designed to provide integrated overload, short-circuit and residual-current protection in one device. The exact Siemens datasheet identifies it as a 63 A, 4-pole, 7-module, D-characteristic, Type A, 30 mA RCBO for compatible three-phase-plus-neutral electrical systems. It is specified for 415 V AC, 50 Hz, with 10 kA short-circuit breaking capacity according to EN 61009-1.

Siemens 5SU1344-8RC63 RCBO

The 5SU1344-8RC63 belongs to the Siemens SENTRON / Betagard 5SU1 RCBO family. An RCBO combines the functions of overcurrent protection and residual-current protection in a single device.

It provides:

• Overload protection

• Short-circuit protection

• Residual-current protection

This integrated design can simplify circuit-level protection compared with separate MCB and RCCB arrangements.

The exact product designation confirms 63 A, 4-pole, 7 modules, D characteristic, Type A and 30 mA.

63 A Rated Current

The RCBO has a rated current of 63 A.

This makes it suitable for compatible higher-current three-phase circuits and feeders designed around a 63 A protective device.

The actual selection should take into account cable ampacity, connected load, installation method, ambient conditions and applicable electrical regulations.

D Tripping Characteristic

The 5SU1344-8RC63 uses a D tripping characteristic.

The D curve is intended for compatible circuits that can experience relatively high starting or inrush currents during normal operation.

Potential applications include:

• Motors

• Transformers

• Compressors

• Industrial machinery

• High-inrush equipment

• Certain solenoid and electromagnetic loads

The D characteristic should be selected only where the load starting-current characteristics and protection coordination justify it.

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 installations containing electronic and rectifier-based loads.

Potential applications include:

• Electronic power supplies

• Automation equipment

• Rectifier circuits

• Industrial control systems

• Modern electrical machinery

• Commercial electronic equipment

The exact Siemens datasheet identifies the residual-current type as Type A.

30 mA Residual Current Sensitivity

The 5SU1344-8RC63 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 technical data 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 construction allows the three phases and neutral to be incorporated into the protection arrangement.

Typical applications include:

• Three-phase distribution boards

• Industrial feeder circuits

• PCC panels

• MCC panels

• Commercial three-phase electrical panels

• Machine power circuits

• Factory electrical systems

• Sub-distribution boards

415 V AC Application

The exact Siemens technical datasheet specifies 415 V AC supply voltage and 50 Hz operating frequency.

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

10 kA Short-Circuit Breaking Capacity

The 5SU1344-8RC63 has a 10 kA short-circuit breaking capacity according to EN 61009-1.

The Siemens technical data additionally specifies:

• 10 kA according to EN 60898

• 15 kA according to IEC 60947-2

• 10 kA rated residual switching capacity according to IEC 61009-1

• Energy limitation class 3

The prospective short-circuit current at the installation point should still be verified during system design.

Combined Overcurrent and Residual-Current Protection

The main advantage of the 5SU1344-8RC63 is its integrated protection architecture.

A conventional arrangement may use:

MCB + RCCB

An RCBO combines the relevant functions:

RCBO = Overload + Short Circuit + Residual Current Protection

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

7-Module Design

The exact Siemens product designation specifies 7 modules.

The technical datasheet specifies 7 modular width units, with a physical width of 126 mm.

The 7-module designation refers to the physical panel width and does not represent a power rating.

Physical Dimensions

The Siemens technical data specifies approximately:

• Height: 90 mm

• Width: 126 mm

• Depth: 70 mm

• Installation depth: 70 mm

• Modular width units: 7

These dimensions are useful for panel builders when checking enclosure space.

DIN-Rail / Modular Installation

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

The 5SU1344-8RC63 can be integrated into suitable:

• Distribution boards

• Industrial control panels

• PCC panels

• MCC panels

• Machine panels

• Commercial switchboards

• Factory electrical enclosures

The available panel space and mounting arrangement should be checked before installation.

Neutral Conductor Switching

The Siemens technical data specifies neutral conductor switching for the device.

This supports the four-pole arrangement used for compatible three-phase-plus-neutral circuits.

Flexible Power-Supply Connection

The technical datasheet specifies that the power supply can be connected from either the top or bottom.

This provides flexibility during panel wiring and installation.

Overload Protection

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

The 63 A rated current 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 EN 61009-1 breaking capacity should be considered 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.

D-Curve Industrial Applications

The D characteristic can be useful for compatible loads with high starting or inrush current.

Potential applications include:

• Motor feeders

• Transformer circuits

• Compressors

• Industrial machinery

• High-inrush equipment

• Selected automation applications

The D curve should not be selected merely because the application is industrial; the actual load starting current and protection coordination must be checked.

Type A Applications with Modern Equipment

The Type A characteristic makes this RCBO suitable for compatible equipment where residual currents may contain pulsating DC components.

Potential applications include:

• Automation systems

• Electronic control panels

• Switching power supplies

• Rectifier-based equipment

• Industrial instrumentation

• Modern machinery

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

Three-Phase Distribution Applications

The 5SU1344-8RC63 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

• D-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 protective mechanism remains operational.

Installation Considerations

Before selecting the 5SU1344-8RC63, verify:

• Rated current: 63 A

• Residual-current sensitivity: 30 mA

• Residual-current type: Type A

• Tripping characteristic: D

• Pole configuration: 4-pole

• Rated voltage: 415 V AC

• Operating frequency: 50 Hz

• Short-circuit breaking capacity: 10 kA

• Panel space: 7 modules

• Cable size and installation method

• Load inrush characteristics

• Applicable national electrical regulations

Difference from C-Characteristic Version

The 5SU1344-7RC63 is a corresponding Type A, C-characteristic 30 mA configuration in the Siemens 5SU1 range.

Therefore:

5SU1344-8RC63 → D characteristic

The main distinction from the corresponding C-curve variant is the overcurrent tripping characteristic.

The D curve is intended for higher inrush-current applications, while the C curve is intended for moderate inrush-current applications.

Difference from Type AC Version

The 5SU1644-2RC63 is a Type AC D-characteristic RCBO with a different residual-current sensitivity configuration.

The 5SU1344-8RC63 is specifically:

63 A + 4-pole + 7 modules + D characteristic + Type A + 30 mA

The residual-current type and sensitivity should both be checked before selecting an alternative.

Difference from 300 mA Type A Version

A 5SU1 Type A, D-characteristic, 300 mA RCBO has a different residual-current sensitivity from the 5SU1344-8RC63.

Therefore:

5SU1344-8RC63 → Type A, 30 mA

A 300 mA model should not be treated as a direct replacement without confirming the protection requirement.

Difference from 30 mA Type AC Version

A Type AC 30 mA model may have the same current rating and pole count but a different residual-current detection characteristic.

Therefore:

5SU1344-8RC63 → Type A, 30 mA

A Type AC equivalent should only be selected when the connected load and protection requirements support Type AC detection.

Difference from 4-Pole C-Curve Version

For the same 63 A, Type A, 30 mA, four-pole configuration:

D characteristic → 5SU1344-8RC63

The corresponding C-curve article should be selected where only moderate inrush capability is required.

Difference from 2-Pole Version

The 5SU1624 and 5SU1354 families contain two-pole RCBO variants.

The 5SU1344-8RC63 is a 4-pole device intended for compatible three-phase-plus-neutral circuits.

Therefore, the pole configuration must be verified before replacing or ordering the product.

Suitable for Electrical Panel Builders and Industrial Buyers

The Siemens 5SU1344-8RC63 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 63 A three-phase circuit protection with D characteristic and 30 mA sensitivity.

These specifications are based on the exact Siemens technical datasheet for 5SU1344-8RC63.

Key Features

• Siemens SENTRON / Betagard 5SU1 RCBO

• Article number 5SU1344-8RC63

• 63 A rated current

• 4-pole configuration

• 7-module format

• Type A residual-current protection

• 30 mA residual-current sensitivity

• D tripping characteristic

• 415 V AC rated voltage

• 50 Hz operating frequency

• 10 kA EN 61009-1 short-circuit breaking capacity

• 15 kA IEC 60947-2 switching capacity

• 10 kA 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.

• 63 A rating: Suitable for compatible higher-current three-phase circuits.

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

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

• D characteristic: Suitable for compatible loads with higher starting or inrush current.

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

• 7-module format: Provides a modular four-pole RCBO 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 5SU1344-8RC63?

The Siemens 5SU1344-8RC63 combines 63 A overcurrent protection, D-curve tripping and Type A 30 mA residual-current protection in a 4-pole, 7-module RCBO.

The exact Siemens technical data confirms 415 V AC, 50 Hz, 63 A, 4-pole configuration, Type A protection, 30 mA sensitivity, D characteristic and 10 kA EN 61009-1 short-circuit breaking capacity.

For SB Smart, this product is best presented as a Siemens Betagard/SENTRON 5SU1 Type A RCBO for 63 A, 30 mA three-phase circuit protection with D 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 5SU1344-8RC63?

The 5SU1344-8RC63 is a Siemens SENTRON / Betagard 5SU1 RCBO rated at 63 A, with 4 poles, 7 modules, D 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 in one device.

3. What is the rated current?

The rated current is 63 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 D 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 exact Siemens technical data specifies 7 modular width units and a physical width of 126 mm.

9. What is the rated voltage?

The exact Siemens datasheet specifies 415 V AC at 50 Hz.

10. What is the short-circuit breaking capacity?

The specified breaking capacity is 10 kA according to EN 61009-1 and 15 kA according to IEC 60947-2.

11. What is the difference between 5SU1344-8RC63 and a C-characteristic version?

5SU1344-8RC63: 63 A, 4-pole, Type A, 30 mA, D characteristic.

A corresponding C-characteristic version uses a different article number.

The main difference is the overcurrent tripping characteristic.

12. What is the difference between Type A 30 mA and Type AC 30 mA RCBOs?

Type A can detect suitable AC residual currents and pulsating DC residual-current components, while Type AC is intended for compatible sinusoidal AC residual currents.

The appropriate type should be selected according to the connected equipment.

13. Where can I buy Siemens 5SU1344-8RC63 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.