Key Features & Typical Use
In a Guest Room the Bell Push Sits beside Everything Else
Upon entering the hotel room, there are lighting switches, card readers, service lights, and bell pushes. The delivery of these bell push buttons from different manufacturers may result in the inconsistent installation of door plates at the hotel entrances – a recurring snag in the case of recent hotels. It is advisable to adopt the same vendor’s bell push buttons and switches at the specifications stage of the hotel building process.
The Correct Action for a Chime
The action of the module is to enable the circuit to perform its function only when you are pressing it. When you release it, it automatically stops working. However, if the module is exchanged for a latching switch, the chime coil will remain activated until it is released, which is among the major causes of the chime being malfunctioning. Thus, momentary action is used in the circuit.
Service and Call Positions
Apart from the entrance of the guest room, temporary switches are also placed in bathrooms, treatment areas, and service areas which help the guests in their stay. There are signs placed on the wall indicating where the switches are situated which can be seen from outside the guest room.
A Wide Plate at a Busy Threshold
In most cases, the visitors press the bell without checking what is on it due to insufficient illumination and carrying other objects. The larger plate provides an effective target area for the button and is easy to operate at the switch of other lights next to it.
Specifications
| Series | SD3B EU standard series |
|---|---|
| Item Code | SD3B-013 |
| Description | Door bell switch (momentary), wide panel |
| Panel Size | 86 x 76mm wide format |
| Rated Current / Voltage | 10A 250V~ |
| Switching Action | Momentary — closed while pressed, open on release |
| Installation | Flush mounting |
| Plate Material | PC (polycarbonate) |
| Contacts | Red copper with silver alloy contact points |
| Supply Form | Finished product, or switch module + frame |
| Packaging | Finished product packaging, or switch + frame packaging |
SD3B-013 – Ending the Mismatched Plate at the Door
Door bell hardware is the last item taken into account before the visitor arrives, but it is also the very first thing a visitor will touch. While the bells themselves provide the needed push buttons, they hardly correlate with the buttons used on the entrance and eventually the entrance starts looking like two unrelated installations being placed at the entrance. It is true with hotels and apartment buildings where this inconsistency happens at every entrance in the entire building.
To pinpoint the push as belonging to the same family of devices eliminates the problem at its source, and it also simplifies procurement from a commercial point of view—there’s one supplier, one panel type, and one delivery for the room’s switches, sockets, buzzer, and push button. The momentary action ensures that the bell circuit works according to plan, and the plate can contain printing data indicating where the service calling device is placed.

Factory-Direct OEM / ODM Manufacturer
We Manufacture, You Brand
Wide panel tooling in-house · PC moulding and copper contacts · OEM branding
- OEM branding – logo on the plate, custom carton and instruction sheet.
- ODM options – panel format, plate colour, plate printing and packaging format.
- Testing – function and electrical tests recorded for each production batch.
- MOQ – flexible per item; confirmed with the quotation for your configuration.

Buying Guide
- Confirm the chime or door entry system requires a momentary contact at the push button.
- Check whether the push shares a frame with the room’s lighting switch, which is usual at a guest room door.
- Confirm the panel format, colour and any printed identification needed at service or call positions.
- Approve a sample plate in place beside the lighting switch.
- Confirm quantities and configuration with our team.
How We Support Your Business
OEM / ODM
Custom housing colour, module mix, frame layout and retail packaging built on our standard EU wiring device platform — your logo on the plate, your carton on the pallet.
Custom moulding · Branded packaging · Private label
Wholesale
Factory-direct pricing with a flexible per-item MOQ, mixing modules, frames and finishes in one container for importers, wholesalers and retail chains.
Factory pricing · Mixed models · Container loading
Distributor Support
Account management, market-specific socket format advice and priority production slots for channel partners building a European wiring device range.
Account manager · Market advice · Priority lead times
Ready to Order the SD3B-013?
Inform us concerning the arrangement of the entrance plates and the requirements of the chime, and we will estimate the EU-standard wide panel door bell switch according to the terms of the factory, with matching devices for the same place.
Contact Our Sales Team
Frequently Asked Questions
Why specify a bell push from the same range as the switches?
Due to the fact that a push button which is supplied separately from the wiring device normally does not match them, this mismatch occurs repeatedly at every door in hotels and apartment buildings. The specification of the push in the same panel format prevents this mismatch from occurring even before the installation starts.
What is a momentary switch?
A switch that connects its contacts for as long as the button is pressed and breaks the circuit after it is released. This feature is needed for the functioning of bell and buzzer circuits; if a latching switch is employed instead, it will keep the chime coil in energised state until it’s turned off.
Can it share a frame with a lighting switch?
Indeed, the bell push is offered as an accessory with SD3B frames so that at the room entrance it can share a frame with the switch for lights in the room and not require another plate.
Is it suitable for a service call point?
Yes it is accurate to say that momentary switches are utilized at aid locations and call points in accessible bathrooms, treatment areas and section corners; moreover, the use of same panels makes these settings similar to other locations in a room.
What voltage does it switch?
The rating of this module is 10A 250V which applies to the transformer fed and mains chime circuits most commonly used in the hospitality sector. However, in case, the door entry equipment employs different configuration, please provide us with the details and we will be glad to confirm the right module for the purpose.
Can the plate be printed for identification?
Yes, plate printing is included in the OEM program. It can identify room numbers or call functions in service locations. Please forward text and design with the inquiry so that it can be communicated further at the sample stage.




