12 Pin 4P2T Push Switch PS-42D02 — Self-Lock & Non-Lock PCB Button

The PS-42D02 is a 12-pin 4P2T push button switch — also described as 4PDT — that switches four separate circuits simultaneously from a single actuator. With four poles and two throws per pole, one press can change the state of four independent contact sets, replacing multiple smaller switches and simplifying the PCB layout.

This 4PDT push switch is available in two operating modes: self-lock (latching) for maintained on/off control, and non-lock (momentary) for temporary push-to-activate functions. The operating mode should be specified when ordering, as the two versions use different internal mechanisms.

Rated at 0.3A and 50V DC, the PS-42D02 is intended for low-power signal and control circuits. It is suitable for audio equipment, test instruments, communication devices, and industrial control panels where multiple signal paths must change state together.

Manufactured in an ISO 9001:2015 certified facility, this PCB push button switch is fully compliant with RoHS 3 and REACH regulations.

Below are the published specifications for the 4P2T push button switch PS-42D02. Confirm all values against the latest Vistar engineering drawing before production release.

Need the full datasheet, dimensional drawing, or a custom version? Contact Vistar directly for the latest technical documentation.

A 4P2T push button switch contains four independent switching poles, each with two throw positions. Because each pole uses three terminals — one common and two throw contacts — the complete 4P2T configuration requires 12 terminals, which is why this component is described as a 12-pin switch.

The main advantage of the 4P2T configuration is that multiple circuits can change state together from one actuator. In audio equipment, for example, four signal paths can be routed at the same time when the user selects a different source or mode. In test equipment, the same actuator can switch several range-select or configuration paths simultaneously, reducing the number of controls on the front panel.

Engineers should always confirm the exact contact diagram before designing the PCB footprint. The terminal arrangement of a 4P2T switch is specific to the product, and two products with the same pin count may use different pole groupings or physical layouts.

When to Use a 4P2T Switch Instead of Multiple Switches

Using a single 4P2T switch instead of several smaller switches can reduce assembly cost, simplify the user interface, and improve the consistency of circuit switching because all poles move together mechanically. It is particularly useful where the user must not be able to switch some circuits without switching the others.

A 4PDT push switch is the same electrical configuration as 4P2T — four poles, two throws. The PS-42D02 is available in two operating modes, and the correct mode depends on whether the application needs a maintained state or a temporary input.

Self-Lock (Latching) Version

In the self-lock version, the switch latches into its new position after the button is pressed and stays there until the button is pressed again. This makes it suitable for power selection, mode switching, and any function that needs to hold a selected state without continuous pressure.

Non-Lock (Momentary) Version

In the non-lock version, the switch changes state only while the button is being pressed. As soon as the button is released, the internal mechanism returns to its resting position. This is suitable for temporary commands such as reset, test, trigger, or service functions.

Both versions use the same 12-pin 4P2T contact arrangement and the same 0.3A / 50V DC rating. The operating mode should always be specified when placing a production order, because the internal mechanism and user experience are different.

A self-lock push switch provides a mechanical memory: once pressed, it stays in the selected position until pressed again. This behavior is sometimes called push-on/push-off, alternate action, or latching. The PS-42D02 self-lock version combines this behavior with a 4P2T circuit configuration, giving maintained control of four independent circuits from one actuator.

Maintained operation is useful when the control must show the current state without continuous user input. In audio equipment, for example, the switch can be left in a selected input position for as long as the equipment is running. In industrial equipment, a maintained switch can hold a configuration state that the controller reads without power being continuously applied to the switch itself.

The 10,000-cycle operating life covers typical applications where the switch is used for mode selection or configuration rather than as a frequently pressed user input. For higher-frequency operation, verify the expected cycle count against the specification before production approval.

When integrating a self-lock switch into a PCB design, the actuator height and travel should be matched to the enclosure opening. The switch must be able to reach its fully latched position without interference from the housing or adjacent components.

A PCB push button switch is designed for direct board mounting. The PS-42D02 uses through-hole DIP terminals that pass through the PCB and are soldered on the opposite side, providing both electrical connection and mechanical retention for the repeated actuation loads that a user-operated switch experiences.

PCB Footprint

Before creating the PCB footprint, verify the terminal arrangement, pin spacing, and actuator position against the manufacturer’s dimensional drawing. A 12-pin switch occupies more board area than a smaller push button, so clearances around the connector body and actuator should be confirmed early in the layout stage.

Actuator Access

The actuator must be accessible from the top of the enclosure or through a panel opening. The button height, travel, and required clearance above the PCB should all match the mechanical design of the finished product.

Mechanical Support

For products with frequent user input, the through-hole terminals absorb most of the actuation force. The housing around the switch should still be designed to prevent lateral loads on the actuator from transferring to the solder joints.

For broader selection information, see Vistar’s How to Choose a Push Button Switch guide.

What Is a 12 Pin 4P2T Push Switch?

A 12 pin 4P2T push switch is a multi-pole push button with four independent poles and two throw positions per pole. Because each pole uses three terminals — one common and two throw contacts — the complete configuration requires 12 terminals. The PS-42D02 is a compact PCB-mount version rated at 0.3A and 50V DC with a 10,000-cycle operating life.

The 4P2T configuration allows one actuator to switch four independent circuits simultaneously. This is useful in products where several related signal paths must change state together, such as audio source selection, test equipment range switching, or multi-line configuration control.

4P2T Push Button Switch — Circuit Configuration and Selection

A 4P2T push button switch provides four poles and two throws per pole. Each pole has one common terminal and two selectable contacts, so the switch can route a common signal to either of two destinations on each of the four poles. When the actuator moves, all four poles change state together.

Before selecting a 4P2T switch, confirm that the application actually requires four poles. If only one or two circuits need to be switched, a smaller SPDT or DPDT switch may be more appropriate and less expensive. Conversely, if more than four poles are needed, a different multi-pole configuration may be required.

4PDT Push Switch — Self-Lock and Non-Lock Options

A 4PDT push switch is the same electrical configuration as 4P2T. The PS-42D02 is offered in both self-lock (latching) and non-lock (momentary) versions. The correct choice depends on the intended control function.

The self-lock version maintains its selected state after the button is pressed and remains in that state until the button is pressed again. This is suitable for power selection, mode switching, and other maintained control functions. The non-lock version returns to its resting state as soon as the button is released, which is suitable for reset, test, trigger, or service functions.

Self-Lock Push Switch — Maintained Multi-Circuit Control

A self-lock push switch provides mechanical memory. Once pressed, it stays in the selected position until pressed again. Combined with the 4P2T configuration, the PS-42D02 self-lock version can maintain the state of four independent circuits simultaneously from a single actuator.

Maintained operation is useful when the control state must be visible or persistent without continuous user input. In audio equipment, the switch can hold a selected input position for as long as the equipment is powered. In industrial equipment, it can hold a configuration state that the controller reads without needing a continuous signal.

PCB Push Button Switch — Design and Layout

A PCB push button switch is designed for direct board mounting. The PS-42D02 uses through-hole DIP terminals that pass through the PCB and are soldered on the opposite side. This provides both electrical connection and mechanical retention for the repeated actuation loads that a user-operated switch experiences.

Before creating the PCB footprint, verify the terminal arrangement, pin spacing, and actuator position against the manufacturer’s dimensional drawing. Because a 12-pin switch occupies more board area than a small tactile switch, clearances around the connector body and actuator should be confirmed early in the layout stage.

Applications Across Industries

This 12 pin 4P2T push switch is found across audio and amplifier equipment, test and measurement instruments, communication equipment, industrial control panels, small appliances, and embedded systems. Its four-pole configuration, 0.3A / 50V DC rating, and self-lock or non-lock operation make it suitable for a wide range of multi-circuit switching functions.

Why Choose Vistar as Your Push Switch Supplier

Vistar Electronics is a trusted manufacturer and supplier of push switches serving customers in consumer electronics, industrial automation, and communication equipment. Our push switch lineup includes multi-pole configurations, self-lock and momentary versions, and various mounting styles for PCB-based applications.

With ISO 9001:2015 certification and a commitment to continuous improvement, Vistar is your reliable partner for high-quality switching solutions. For more technical resources, including PCB layout guidelines and switch selection guides, visit our technical blog or contact our engineering support team directly.

Explore our full range of push switches and related content:

• Push Switches — Full Product Collection
• How to Choose a Push Button Switch
• What Is a Pushbutton Switch
• Pushbutton Switch Wiring Diagram

For switch qualification and international electronics production, the following official references provide useful background information:

• International Electrotechnical Commission (IEC) — standards for electrical and electronic equipment
• European Commission — RoHS Directive
• European Chemicals Agency — REACH

These references are provided for engineering and compliance background. The applicable requirements for the finished equipment should be determined according to the product category, destination market, and customer specifications.