{"id":1602,"date":"2026-09-19T14:10:00","date_gmt":"2026-09-19T06:10:00","guid":{"rendered":"https:\/\/lemaele.com\/blog\/6-pin-toggle-switch-wiring-guide\/"},"modified":"2026-09-19T14:10:00","modified_gmt":"2026-09-19T06:10:00","slug":"6-pin-toggle-switch-wiring-guide","status":"publish","type":"post","link":"https:\/\/lemaele.com\/es\/blog\/6-pin-toggle-switch-wiring-guide\/","title":{"rendered":"Cableado del interruptor de palanca de 6 pines: Verificar la disposici\u00f3n de los terminales DPDT"},"content":{"rendered":"

6-pin toggle switch wiring<\/strong> usually refers to a double-pole, double-throw (DPDT) switch: two independent changeover contact sets operated by one handle. Each pole has a common and two possible throws, giving six external terminals. Do not wire a switch from the pin count or a generic photograph alone. Identify the exact model and its ON-ON, ON-OFF-ON, momentary, or other action; then test the de-energized terminals for continuity in every handle position. Only after that map should a qualified person connect a circuit that fits the switch’s ratings and the equipment’s protection design. This guide focuses on terminal identification and verification, not an untested universal pinout.<\/p>\n

\"Original
Original LEMA LT2220C product photo. Six flat terminals can be inspected from this angle; their functional mapping must still be verified from the exact drawing and continuity test.<\/figcaption><\/figure>\n

What six terminals mean\u2014and what they do not<\/h2>\n

A DPDT toggle is functionally two SPDT changeover contacts moved together. Pole A and pole B are electrically separate until an external circuit connects them. Each pole has a common terminal that connects to one throw in one position and the other throw in the opposite position. The switch can route two independent signals, or be arranged for another appropriate application after the circuit designer verifies ratings and fault behavior. Six terminals do not reveal which physical lug is common on a particular model, and they do not reveal whether the center position is OFF.<\/p>\n

The City Tech electronics lab manual<\/a> treats a DPDT as a two-state input and explicitly tells students to check continuity because a real switch can differ from the illustrated pattern. A South African Department of Basic Education learner book<\/a> explains a DPDT as two SPDT sections moving together. These sources support the contact concept; neither substitutes for LEMA’s exact terminal drawing.<\/p>\n

Some six-lug products are not the same internally. An illuminated switch can have terminals dedicated to a lamp. A spring-return variant may not remain in a selected position. A product listing can also show one side of a six-terminal unit, making only three lugs visible. Read the marked part number, not just the sales title, and verify the actual sample before designing a harness.<\/p>\n

Start with a terminal map, not a copied wiring diagram<\/h2>\n

Before connecting any source, remove power, isolate the switch from the rest of the circuit, and record the six physical lug positions as seen from one stated viewing direction. Photograph or sketch that view, marking a datum such as the lever side or terminal-side face. A diagram viewed from the rear can appear mirrored relative to a front view. This is the source of many \u201cthe center pin is common\u201d errors: the center may often be common in a typical 2\u00d73 layout, but it must be confirmed for the exact model and viewing direction.<\/p>\n

Set a meter to its low-ohms or continuity mode. With the switch disconnected, probe one lug against each of the others in every stable handle position. A true common for one pole will connect to one of two throw terminals depending on position; it should not become connected to the other pole’s common in an isolated DPDT section. Repeat for the other three lugs. If a center-off model is selected, both common-to-throw paths may be open at center. A momentary model returns when released, so record both the held and released states.<\/p>\n

Check the switch’s own terminal markings and schematic against this measured map. If the drawing and sample disagree, stop and resolve the model or orientation mismatch with the supplier. Do not force a wiring layout to match a blog diagram. The goal is an auditable contact table for that physical part.<\/p>\n

DPDT continuity table for a verified sample<\/h2>\n

Use neutral labels until you know the manufacturer’s terminal numbering: A-COM, A-1, A-2 for one pole and B-COM, B-1, B-2 for the second. The table below represents an ordinary maintained ON-ON changeover after<\/em> its terminal identities have been confirmed. It is a functional truth table, not a claim about the physical lug order of every six-pin switch.<\/p>\n

\n\n\n\n\n\n\n\n
Handle position<\/th>\nPole A expected closed pair<\/th>\nPole B expected closed pair<\/th>\nPairs that should remain open<\/th>\nVerification note<\/th>\n<\/tr>\n<\/thead>\n
Position 1<\/td>\nA-COM to A-1<\/td>\nB-COM to B-1<\/td>\nA-COM to A-2; B-COM to B-2; cross-pole paths<\/td>\nMeasure the actual sample and label the physical lugs.<\/td>\n<\/tr>\n
Position 2<\/td>\nA-COM to A-2<\/td>\nB-COM to B-2<\/td>\nA-COM to A-1; B-COM to B-1; cross-pole paths<\/td>\nConfirm both poles transfer together.<\/td>\n<\/tr>\n
Center, only if specified OFF<\/td>\nNo common-to-throw path<\/td>\nNo common-to-throw path<\/td>\nAll four common-to-throw paths<\/td>\nDo not invent a center OFF for an ON-ON part.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

For a different contact action, change the table based on the exact drawing and test results. Some switching systems specify break-before-make or make-before-break behavior during motion; a static continuity test at end positions may not establish the transient sequence. If the application cannot tolerate a short overlap or gap, obtain an appropriate switching-sequence specification and validate it dynamically.<\/p>\n

How to plan a two-circuit connection<\/h2>\n

For two independent low-voltage signal circuits, the designer can route circuit A through pole A and circuit B through pole B. Identify each circuit’s incoming line or signal, its desired output in each handle position, common references, and the expected state when the switch is disconnected. Then assign those nets to the verified A-COM\/A-1\/A-2 and B-COM\/B-1\/B-2 contacts. Document the final result as a net-to-terminal list and a schematic with the actual part number.<\/p>\n

Never assume the poles are automatically a safe isolation barrier between unrelated voltages. Check the model’s insulation, spacing, voltage rating, terminal construction, and the equipment standard. Likewise, switching two lines together does not turn a general control toggle into a certified disconnect or safety device. A rated fuse, circuit breaker, protective earth, enclosure, and qualified installation may be required by the finished equipment design. This article deliberately does not give a mains-wiring recipe for an unknown machine.<\/p>\n

If the intended use is polarity reversal or motor control, the connection is more demanding than a straight two-circuit selector. Reversal can create short-circuit or back-EMF hazards and may require current limiting, interlocking, suppression, and a center-off transition. Do not copy crossed jumpers from a small hobby circuit into a production power circuit. Design the load path and protection around the exact motor and switch ratings. LEMA’s DPST two-circuit isolation guide<\/a> explains the simpler single-throw alternative when changeover is not actually needed.<\/p>\n

\"Original
Original LT2220C front-side view: only three terminals are visible from this angle. The terminal-side image above is needed to see the six-lug layout.<\/figcaption><\/figure>\n

Choosing the right action and terminal style<\/h2>\n

\u201cSix-pin\u201d tells you the terminal count, not the handle sequence. ON-ON has two maintained contact states. ON-OFF-ON adds a stable open center when that action is specified. A momentary variant returns from one or more positions when released. The center behavior directly affects what a controller or load sees during user operation. Check the exact suffix or ordering code and obtain the supplier’s contact-form drawing before approving an operator-panel label.<\/p>\n

Terminal style matters too. Solder lugs, quick-connect tabs and screw terminals need different harness, strain-relief and inspection processes. The LEMA LT2220C six-terminal product page<\/a> shows flat blade terminals; the visible construction should guide the correct mate and installation review. Do not interpret the phrase \u201csafety toggle\u201d in a product title as proof that the switch is a certified machine-safety component. Request the exact part’s certifications and drawings if a compliance claim affects the equipment design.<\/p>\n

Check panel cutout, thread, anti-rotation feature, lever clearance, washer stack, nut torque, and enclosure space behind the panel. A correct contact map can still fail in production if the harness pulls a terminal sideways or the installed switch rotates under use. For general panel applications, LEMA’s toggle-switch applications guide<\/a> provides the broader context. The four-pin illuminated-toggle guide<\/a> helps distinguish a six-contact DPDT from a lower-count device whose extra pins may serve an indicator.<\/p>\n

A practical pre-power QA checklist<\/h2>\n
    \n
  1. Verify identity.<\/strong> Compare the sample’s body marking, order code, contact action, and terminal construction with the approved drawing.<\/li>\n
  2. Label the view.<\/strong> Record whether the terminal map is seen from the front, rear, or underside; mark a fixed orientation datum.<\/li>\n
  3. Measure all six terminals.<\/strong> Log continuity and isolation for every stable and momentary handle state while the circuit is de-energized.<\/li>\n
  4. Compare the netlist.<\/strong> Trace each wire from its source through the intended pole to the intended output in both positions.<\/li>\n
  5. Check ratings.<\/strong> Confirm voltage, steady and inrush current, AC or DC load type, and any contact protection on the actual load.<\/li>\n
  6. Check physical build.<\/strong> Inspect terminal mating, insulation, pull relief, clearances, panel mounting and operator labeling.<\/li>\n
  7. Power-test in a controlled setup.<\/strong> Verify both operating positions, transition behavior, and the state when a wire is disconnected under the equipment’s approved test procedure.<\/li>\n<\/ol>\n

    A continuity buzzer is only a first check. It does not demonstrate dielectric strength, contact endurance, loaded voltage drop, or safety performance. Use the acceptance test applicable to the finished equipment. If the terminal numbering changes between qualified suppliers, maintain an approved harness drawing for each approved part rather than relying on an unqualified \u201cdrop-in\u201d label.<\/p>\n

    Common six-pin wiring errors<\/h2>\n

    Mirroring the underside view is a frequent error: the two poles may look reversed when the switch is rotated. Another is joining what appear to be adjacent lugs before determining which are commons. A third is assuming the lever direction and closed-throw direction correspond visually; handle mechanics can make the contact opposite to what a novice expects. Powering a circuit before a meter check turns an easily caught orientation mistake into a possible short or equipment fault.<\/p>\n

    Mixing circuits without reviewing insulation and voltage ratings is a more serious error. The two poles move together but are not a general-purpose guarantee of safe separation. If the application involves mains or a hazardous machine, have the final wiring and protective functions reviewed by a qualified electrical engineer. Use the product drawing, not a generic blog graphic, as the source of truth.<\/p>\n

    Video: understanding the DPDT contact concept<\/h2>\n

    The non-commercial S&T Dude explainer on the DPDT switch concept<\/a> demonstrates why two poles change state together. Use it for the principle only; verify the LEMA sample’s terminal positions and ratings independently.<\/p>\n