Alpha WSERD30-B 3/20C Rechargeable Blind Motor

The Alpha WSERD30-B 3/20C is a 3Nm rechargeable tubular motor designed for larger motorised roller blinds where greater lifting capacity is required while retaining the convenience of rechargeable operation.

Alpha specifies a maximum lifting capacity of a roller blind up to 3 metres high × 4 metres wide, making the Alpha WSERD30-B 3/20C a step up in capacity from the smaller motors in the WSERD30-B range.

The motor combines USB-C charging, electronic limits, an integrated receiver, adjustable operating speed, soft-stop functionality and Alpha’s efficient coreless motor design in a compact 525mm motor.

3Nm Lifting Power

The Alpha WSERD30-B 3/20C provides 3Nm of rated torque.

Alpha specifies its maximum lifting capacity as:

3m high × 4m wide

This makes the motor suitable for larger compatible roller blinds that require more torque than the 1Nm and 2Nm models.

Motor selection should always take into account the complete blind configuration, including blind dimensions, fabric weight, tube and associated components rather than relying on dimensions alone.

USB-C Rechargeable System

The Alpha WSERD30-B 3/20C uses a 5V/1A USB-C charging system, providing convenient access to the motor’s rechargeable power system.

The compatible Alpha ALDC 5V-C Charger includes a 3-metre cable, allowing the charger to reach blinds installed above normal power-point height.

Alpha also offers 20cm and 3-metre USB-C extension cables where additional reach is required.

Efficient Coreless Motor Design

The Alpha WSERD30-B 3/20C incorporates Alpha’s new super-efficient coreless motor design.

The coreless design forms part of the motor’s rechargeable architecture and is combined with adjustable speed and super-quiet operation to provide controlled movement of compatible roller blinds.

Adjustable 15/18/20 RPM Speed

The Alpha WSERD30-B 3/20C provides three selectable operating speeds:

15 / 18 / 20 rpm

Being able to adjust the operating speed allows the movement of the blind to be configured according to the requirements of the installation.

The lower operating speeds are also appropriate to the increased 3Nm torque and larger blind capacity of this model.

Soft Stop Function

The motor features a soft stop function.

Rather than bringing the blind to an abrupt halt at the end of its movement, the soft-stop system provides more controlled stopping behaviour.

For everyday operation, this contributes to the refined feel expected from a quality motorised roller blind system.

Super-Quiet Operation

Alpha specifies super-quiet operation for the Alpha WSERD30-B 3/20C.

Quiet operation is particularly useful in bedrooms, living areas, offices and other environments where motor noise could otherwise become distracting during regular blind operation.

Electronic Limit Switch

An electronic limit switch is incorporated into the Alpha WSERD30-B 3/20C.

The motor can therefore be configured with the required upper and lower stopping positions for the roller blind.

Once correctly configured, these electronic limits determine where the blind stops during normal opening and closing.

Built-In Receiver

The receiver is built directly into the motor, allowing the Alpha WSERD30-B 3/20C to communicate with compatible Alpha controls without requiring a separate external receiver.

This helps simplify the overall motorised blind installation and reduces the number of separate control components required around the blind.

No External Antenna

Alpha specifically lists no antenna as a feature of the Alpha WSERD30-B 3/20C.

Together with the integrated receiver and rechargeable design, this helps provide a clean installation around the motor head.

Solar Charging Option

Alpha lists the Alpha TYB004 Solar Panel as a compatible accessory for the Alpha WSERD30-B 3/20C.

The TYB004 provides 3W USB-C solar charging, allowing available sunlight to contribute to charging the motor’s battery where the installation is suitable.

Solar performance depends on factors including panel positioning, window orientation, shading, weather and available sunlight.

Technical Specifications

• Model: Alpha WSERD30-B 3/20C
• Product Code: WSERD30-B-3/20 C
• Rated Torque: 3Nm
• Maximum Lifting Capacity: Roller blind up to 3m × 4m
• Output Speed: 15 / 18 / 20 rpm
• Speed Adjustable: Yes
• USB-C Charger: 5V / 1A
• Nominal Voltage: 11.1V
• Electronic Limit Switch: Yes
• Built-In Receiver: Yes
• Coreless Motor Design: Yes
• Soft Stop: Yes
• Super-Quiet Operation: Yes
• External Antenna: No
• Protection Index: IP20
• Running Time: Infinity (Alpha specification)
• Maximum Turns: Infinity (Alpha specification)
• Length: 525mm
• Net Weight: 0.54kg
• Included C&D: A2310

Compatible Accessories

These four names are ideal ones to make internal links to the relevant Frontline product pages:

Alpha TYB004 Solar Panel

3W USB-C solar panel listed by Alpha as an accessory for the Alpha WSERD30-B 3/20C.

Alpha ALDC 5V-C Charger

5V USB-C charger supplied with a 3-metre charging cable.

Alpha EXT USB-C 20cm

20cm USB-C extension cable for compatible Alpha charging installations.

Alpha EXT USB-C 3m

3-metre USB-C extension cable where additional charging reach is required.

Lithium Battery Safety

The Alpha WSERD30-B 3/20C uses lithium-ion battery technology and must be charged, stored and handled according to Alpha’s safety instructions.

Disconnect the motor from the charger once the green light indicates that charging is complete. Alpha warns that overcharging may cause overheating and present a fire risk.

Avoid prolonged exposure to high temperatures or direct sunlight. If the motor develops unusual warmth, discolouration or odours, disconnect it from the power source and stop using it immediately.

Store the motor in a cool, dry location away from flammable materials. Alpha recommends a storage temperature range of -20°C to +65°C.

Always use the charger supplied with the motor or an Alpha-approved replacement. Incompatible charging equipment can create safety hazards.

Lithium-ion batteries should be disposed of according to applicable local regulations and should not be incinerated or submerged in water.

Alpha recommends charging the motor every six months to help maintain the battery and advises ensuring children do not play with the motor or its remote control.

FAQs

What size blind can the Alpha WSERD30-B 3/20C operate?

Alpha specifies a maximum lifting capacity of a roller blind up to 3 metres high × 4 metres wide.

How powerful is the Alpha WSERD30-B 3/20C?

The motor has a rated torque of 3Nm, making it the higher-capacity option compared with the 1Nm and 2Nm WSERD30-B models we’ve just added.

What charger does the Alpha WSERD30-B 3/20C use?

It uses 5V/1A USB-C charging. Alpha lists the Alpha ALDC 5V-C Charger with a 3-metre cable as a compatible accessory.

Can the speed be adjusted?

Yes. The Alpha WSERD30-B 3/20C offers selectable 15, 18 and 20 rpm operating speeds.

What does the soft-stop function do?

The Alpha WSERD30-B 3/20C features a soft-stop function designed to provide controlled stopping behaviour as the motor completes its movement.

Can I use a solar panel with the Alpha WSERD30-B 3/20C?

Yes. Alpha lists the Alpha TYB004 3W USB-C Solar Panel as a compatible accessory.

Does the Alpha WSERD30-B 3/20C have a built-in receiver?

Yes. The receiver is integrated into the motor, eliminating the need for a separate external receiver when used with compatible Alpha controls.