12 Pin Slide Switch 4P2T Right Angle DIP — SK-42D02 Horizontal 4-Pole Double Throw PCB Toggle Switch for Audio & Multi-Channel Signal Routing

4P2T stands for 4 Pole, 2 Throw — the switch contains four independent SPDT (1P2T) switching circuits in one body, all actuated simultaneously by a single slide lever. Each of the four poles has its own COM, T1, and T2 contacts, with all four switching simultaneously when the actuator moves.

You need 4P2T when you must switch four signal paths simultaneously — for example:

• Balanced stereo audio: switching both the positive and negative conductors of both left and right channels simultaneously (L+, L−, R+, R−) requires 4 poles.
• Differential signal routing: switching both the + and − lines of multiple differential pairs simultaneously.
• Multi-bus selection: connecting four independent signal lines to one of two buses at once.

Using four separate SPDT switches would require mechanical ganging or complex PCB routing, and would not guarantee simultaneous switching — the 4P2T single-body design guarantees all four poles switch at exactly the same actuator position. See the IEC 61058 standard for switch circuit function terminology.

The SK-42D02 has 12 pins arranged as four groups of three — one group per pole. Each group follows the SPDT pattern:

• Pin x1: T1 (Throw 1) — connected to COM when actuator is in Position 1
• Pin x2: COM (Common) — always connected, routes to T1 or T2
• Pin x3: T2 (Throw 2) — connected to COM when actuator is in Position 2

The four pole groups (Pole 1 through Pole 4) are arranged in sequence across the 12-pin row. The exact pin numbering, physical pin pitch, and dimensional drawing are provided in the product datasheet — request it from sales@vistarelectronics.com for PCB layout reference.

Yes — this is one of the primary applications for a 4P2T slide switch. A balanced stereo audio signal has four conductors: Left+ (L+), Left− (L−), Right+ (R+), and Right− (R−). Switching a balanced stereo path between two sources or two destinations requires switching all four conductors simultaneously — exactly what the SK-42D02’s four independent poles provide.

The gold-plated contacts minimise contact resistance and resist oxidation, ensuring clean, low-noise audio signal switching. At the 0.5A / 50V rating, the SK-42D02 handles line-level audio signals (typically <2V RMS, <1mA) with substantial headroom. For studio and audiophile applications, consider adding 100nF bypass capacitors on the audio lines near the switch to suppress any contact-related noise transients during switching.

The orientation describes how the actuator is accessed relative to the PCB:

• Right-angle / horizontal (SK-42D02): the switch body lies flat on the PCB, actuator extends toward the board edge, accessible from the side of the assembly. Standard for front-panel and side-panel access on equipment where the PCB is mounted vertically or where the panel is at the board edge.
• Vertical / upright: the switch body stands perpendicular to the PCB, actuator extends upward, accessible from above the PCB. Used when the panel is above the board (horizontal PCB in a top-access housing).

For vertical 4P2T slide switches or other pole-count options, contact Vistar sales for available configurations.

Yes. The SK-42D02 is rated at 0.5A / DC 50V maximum — it easily handles 3.3V and 5V logic-level signals which typically draw microampere to milliampere currents. The gold-plated contacts provide consistent low resistance at these low voltages, ensuring clean logic-level switching without false states or intermittent contact at sub-milliamp currents.

For logic-level switching, pull-up or pull-down resistors (10kΩ typical) are recommended on the switched outputs to prevent floating inputs when the contacts open. The latching slide mechanism holds its state indefinitely without power, making it suitable for configuration jumper or mode-select applications where the switch setting must persist after power cycling.

The SK-42D02 uses through-hole DIP mounting. Two assembly methods are supported:

• Wave soldering: insert all 12 pins into the PCB holes and pass through the wave solder machine. The high-temperature thermoplastic body withstands standard wave soldering profiles.
• Hand soldering: solder each pin individually — suitable for prototyping, low-volume production, and rework.

The SK-42D02 is supplied in bag or tray packaging and is not compatible with SMT pick-and-place reflow production. When mounting, ensure the slide actuator is accessible through the housing panel slot, with sufficient travel clearance (both Position 1 and Position 2) before the final chassis assembly.

Standard MOQ is 1,000 pieces with a 2–4 week production lead time. Free samples are available for qualified engineering and product development projects. Contact sales@vistarelectronics.com with your company details, project application, and part number (SK-42D02), or click the “Get a Quote” button at the top of this page.