6 Pin DPDT Push Button Switch — Self-Locking & Momentary PCB Mount Push Switch for Dual-Circuit Audio, Industrial Control & Embedded Systems

The PS-22F31 is a 6 pin DPDT push button switch engineered for applications requiring simultaneous control of two independent electrical circuits through a single mechanical actuator. The DPDT (Double Pole, Double Throw) configuration — equivalent to two electrically isolated SPDT switches mechanically linked inside one compact body — enables engineers to switch power rails, reverse motor polarity, route audio signals, or toggle between dual operational modes with a single button press, reducing component count and simplifying user interface design.

Unlike single-pole switches that only interrupt or redirect one circuit, this pcb mount dpdt push switch maintains circuit isolation between the two poles while ensuring synchronous switching action. When the button is pressed, both poles move together — Pole 1 connects COM1 to either NO1 or NC1, while Pole 2 simultaneously connects COM2 to either NO2 or NC2. This coordinated action is essential for applications like DC motor reversing (where both motor terminals must be polarity-swapped together), balanced audio routing (where left and right channels must switch simultaneously), and dual-rail power supply selection (where +V and -V must be toggled in unison).

Available in both self-locking (latching) and non-lock (momentary) variants, this latching push button switch 6 pin adapts to diverse application requirements. The self-locking version maintains its state after release — press once to turn ON, press again to turn OFF — ideal for power switches and mode selection where the circuit state must persist without continuous button holding. The momentary version returns to default position upon release — ideal for reset functions, temporary bypass, and pulse-triggered control signals where the action should only occur during active pressing.

With a robust 10,000 cycle mechanical life and through-hole DIP mounting with integrated metal bracket retention, the PS-22F31 delivers industrial-grade reliability in a compact PCB-mountable package suitable for both consumer electronics and demanding industrial environments.

Understanding the internal mechanism of a dpdt push button switch is essential for correct circuit design and wiring. The DPDT configuration contains two completely independent switching circuits (Pole 1 and Pole 2) that are mechanically coupled to a single actuator — the push button.

Pinout Configuration (6 Pins)

The standard 6 pin push button switch pin assignment is:

• Pin 1 (COM1): Common terminal for Pole 1 — the input connection
• Pin 2 (NO1): Normally Open for Pole 1 — connects to COM1 when button is pressed (or locked ON)
• Pin 3 (NC1): Normally Closed for Pole 1 — connects to COM1 when button is released (default state)
• Pin 4 (COM2): Common terminal for Pole 2 — the second independent input
• Pin 5 (NO2): Normally Open for Pole 2 — connects to COM2 when button is pressed (or locked ON)
• Pin 6 (NC2): Normally Closed for Pole 2 — connects to COM2 when button is released (default state)

Self-Locking (Latching) Operation

When the self locking push button switch dpdt variant is pressed:

1. First press: Internal cam mechanism locks the button in the depressed position. Both poles simultaneously switch — COM1 connects to NO1 (disconnecting NC1), and COM2 connects to NO2 (disconnecting NC2). The circuit remains in this state after finger release.
2. Second press: The cam mechanism releases, returning the button to its extended position. Both poles revert to default — COM1 reconnects to NC1, and COM2 reconnects to NC2.

This toggle behavior makes the self-locking version ideal for power ON/OFF switches, mode selection (Mode A / Mode B), and any application where the circuit must maintain state without continuous user input.

Non-Lock (Momentary) Operation

When the momentary dpdt push button switch variant is pressed:

1. Press and hold: Both poles switch — COM1→NO1, COM2→NO2. The circuit is active only while finger pressure is maintained.
2. Release: Internal spring returns the button to extended position. Both poles revert to default — COM1→NC1, COM2→NC2.

This transient behavior makes the momentary version ideal for reset functions, temporary bypass, jog controls, and pulse-triggered logic signals where the action should only occur during active pressing.

Break-Before-Make Action

Both variants implement break-before-make contact sequencing — the NC connection breaks before the NO connection makes. This prevents momentary shorting between the two throw terminals during switching, essential for safe power routing and preventing glitches in digital signal paths.

Selecting between self-locking (latching) and non-lock (momentary) operation is one of the most critical decisions when specifying a 6 pin dpdt push button switch. The wrong choice can render a product unusable or create safety hazards.

When to Choose Self-Locking

• Power ON/OFF control: Audio amplifiers, test equipment, industrial controllers where the device must remain powered after button release
• Mode selection: Oscilloscope trigger modes, multimeter range selection, audio mixer routing where the selected mode must persist
• A/B signal routing: Switching between two input sources, antenna selection, filter bank engagement where the route must remain active
• Manual override: Emergency stop bypass, maintenance mode entry, calibration mode where the state must be deliberately maintained

When to Choose Momentary

• System reset: Microcontroller reset lines, FPGA reconfiguration, communication module restart where a brief pulse initiates action
• Jog/inch control: CNC machine axis jogging, conveyor belt inching, robotic arm positioning where motion must stop immediately upon release
• Temporary bypass: Safety interlock override for maintenance, alarm silence, diagnostic mode entry where the action must not persist
• Digital input: GPIO trigger to MCU, interrupt generation, keyboard matrix scanning where the signal is sampled as a transient event

Proper PCB design and wiring are essential to achieving reliable dual-circuit performance from this 6 pin dpdt push button switch. Follow these engineering best practices:

Footprint & Pad Design

• Use the manufacturer-recommended land pattern. The 6-pin DIP configuration with metal bracket requires precise hole diameter, pad sizing, and bracket slot placement. Verify the footprint against the official datasheet before PCB fabrication.
• Maintain adequate solder mask clearance between adjacent pads to prevent solder bridging during wave soldering. A minimum 0.25 mm solder mask web is recommended.
• Include pinout markings on the PCB silkscreen — label COM1, NO1, NC1, COM2, NO2, NC2 to prevent wiring errors during assembly and service. Color-coded silkscreen or polarity indicators reduce field wiring mistakes.
• Bracket slot dimensions: The metal mounting bracket requires precisely sized PCB slots for secure retention. Slots that are too narrow prevent proper insertion; slots that are too loose compromise mechanical stability and EMI shielding effectiveness.

Wiring Best Practices for DPDT Circuits

• Motor reversing (H-bridge substitute): Connect motor terminal A to COM1 and NO1/NC1; motor terminal B to COM2 and NO2/NC2. When switched, both terminals swap polarity simultaneously, reversing rotation direction. Add flyback diodes across motor terminals to suppress inductive kickback that would arc the contacts.
• Audio A/B routing: Connect source A to NC1/NC2, source B to NO1/NO2, and amplifier input to COM1/COM2. Ensure ground reference continuity — route audio ground through the switch or maintain a separate ground plane to prevent ground loop hum.
• Dual-rail power selection: Connect supply A +V to NC1, -V to NC2; supply B +V to NO1, -V to NO2; load +V to COM1, -V to COM2. Verify both rails switch simultaneously to prevent asymmetric power application that could damage sensitive analog circuitry.
• Independent circuit use: The two poles are electrically isolated — COM1/NO1/NC1 and COM2/NO2/NC2 share no internal connection. Use Pole 1 for power switching and Pole 2 for signal routing, or any combination where circuit isolation is maintained.

Signal Integrity & Contact Protection

• Inductive load suppression: When switching relay coils, solenoids, or motors, implement RC snubbers (100Ω + 0.1μF) or flyback diodes (1N4007, 1N5408) across the load to suppress contact arcing. Unsuppressed inductive loads will rapidly degrade contacts and reduce cycle life below the rated 10,000 cycles.
• Capacitive load inrush: When switching power supply inputs or large filter capacitors, the inrush current can exceed the 0.3A rating. Implement NTC thermistors, soft-start circuits, or pre-charge resistors to limit peak current during switching.
• High-current derating: While rated for 0.3A, consider derating to 0.2A for continuous operation in elevated ambient temperatures (>60°C) or when switching resistive loads near the rating limit. This maximizes contact life and minimizes resistive heating.

Soldering Recommendations

• Wave soldering: Preheat to 100–130°C, wave temperature 250–260°C, dwell time 4–6 seconds. The through-hole pins and bracket legs provide excellent solder wetting and joint strength. Ensure complete barrel fill on all 6 pins and both bracket legs.
• Hand soldering: Use a 300–350°C iron tip, apply heat to the pad and lead simultaneously, and feed solder from the opposite side. Solder bracket legs first to establish mechanical stability before soldering signal pins.
• Post-solder inspection: Verify all 6 pins exhibit complete barrel fill with concave solder fillets. Check bracket leg solder joints for adequate wetting. Confirm the switch sits flat against the PCB without tilt, ensuring proper button alignment with the enclosure aperture.

For the official mechanical drawing, recommended PCB footprint with bracket slots, 3D STEP model, and application circuit examples, please contact our sales team or request the PS-22F31 datasheet.

All Vistar push button switches, including this 6 pin dpdt push button switch, are manufactured under stringent quality management systems with comprehensive testing at every production stage:

• 100% electrical testing: Every switch is tested for contact resistance, insulation resistance, and dielectric withstand voltage before shipment
• Operating force verification: Statistical sampling confirms push force and return force remain within specification across production lots
• Dimensional inspection: Automated optical measurement confirms pin spacing, body dimensions, bracket coplanarity, actuator height, and travel distance
• Locking mechanism testing: Representative samples undergo 10,000 cycle latching/unlatching validation to verify self-locking reliability and momentary spring return consistency
• Contact sequencing verification: High-speed data acquisition confirms break-before-make timing on both poles, ensuring no shorting between throws during switching
• Environmental testing: Thermal cycling, humidity exposure, and salt spray testing confirm performance under challenging conditions
• RoHS & REACH compliance: Full material composition documentation available for regulatory compliance and international export

Our manufacturing facilities maintain ISO 9001 quality management certification with full lot traceability. Certificate of Conformance (COC), material safety data sheets, and RoHS test reports are available upon request for customer qualification and audit requirements.

For comprehensive guidance on push button switch selection, DPDT circuit design, and industrial application best practices, explore these authoritative resources:

• What Is a Pushbutton Switch — Types, Key Parameters, and Procurement Tips — Comprehensive guide covering push button switch types, critical selection parameters, and common procurement pitfalls for industrial and consumer applications.
• PCB Push Switch DPDT 6 Pin Right Angle — PS-22F03 Through-Hole Right-Angle DPDT Push Button Switch for Audio, Instrumentation & Industrial Control — Right-angle DPDT variant for side-exit panel mounting applications where vertical orientation is impractical.
• Horizontal Push Switch 2P2T — Horizontal-actuation DPDT push switch for low-profile enclosure designs and space-constrained PCB layouts.

Explore our full range of Pushbutton Switches for alternative configurations including SPDT, 4P2T, right-angle, vertical, miniature, and custom actuator styles for every application requirement.

The 6 pin DPDT push button switch is one of the most versatile electromechanical components in modern PCB design, serving as the fundamental building block for dual-circuit control in audio equipment, industrial automation, automotive electronics, and embedded systems. The DPDT (Double Pole, Double Throw) configuration provides two independent SPDT switches mechanically linked to a single actuator, enabling synchronized switching of two circuits with a single button press.

Unlike simpler SPST (Single Pole, Single Throw) switches that merely open or close one circuit, or SPDT switches that route one circuit between two paths, the dpdt push button switch enables complex control scenarios: DC motor reversing (swapping both terminal polarities simultaneously), balanced stereo audio routing (switching left and right channels together), dual-rail power supply selection (toggling +V and -V in unison), and independent dual-circuit control (power on Pole 1, signal on Pole 2).

The choice between self locking push button switch dpdt and momentary variants fundamentally determines the user interaction model. Self-locking switches maintain their state after release — press once to activate, press again to deactivate — making them ideal for power control, mode selection, and any application where the circuit must remain engaged without continuous user input. Momentary switches return to default upon release — requiring continuous pressure to maintain the active state — making them essential for safety-critical applications like jog controls, reset functions, and temporary bypass where sustained activation could create hazards.

When selecting a pcb mount dpdt push switch for your design, consider not only the electrical ratings (voltage, current, contact resistance) but also the mechanical requirements (operating force, travel distance, cycle life), environmental factors (temperature range, vibration, moisture), and manufacturing constraints (mounting style, soldering method, packaging). The PS-22F31 addresses these considerations with its 0.3A 50V rating, 10,000 cycle life, through-hole DIP mounting with metal bracket, and availability in both self-locking and momentary configurations — providing a single-part solution for diverse dual-circuit control applications.