Inline ON/OFF Rocker Switch Cable - DC 5.5x2.1mm Male to Female Power Extension

Specifications

• Connector A (Input): DC 5.5mm x 2.1mm Female Jack

• Connector B (Output): DC 5.5mm x 2.1mm Male Plug

• Switch Type: Mechanical Inline Rocker Switch (SPST)

• Supported Voltage Range: 5V - 24V DC

• Maximum Current Rating: ~2A to 3A

• Color: Black

Key Applications and Projects

• LED Lighting Control: Instantly turn cabinet lighting, bias lighting behind a TV, or workbench LED strips on and off.

• CCTV & Security: Providing a hard reset switch for security cameras or Wi-Fi routers that occasionally need to be power-cycled.

• Microcontroller Projects: Acting as a safe power switch for Arduino, ESP32, or Raspberry Pi projects using barrel jack power inputs.

Unlock New Capabilities (Project Evolution)

• The Ultimate Workbench Power Station: Pair this simple inline switch with a DC 5.5mm 1-to-4 Splitter Cable. You can plug your main 12V bench power supply into this switch, then run the splitter off the male end. You now have a master "kill switch" that can power down four different 12V devices (like a soldering iron fume extractor, bench LED light, and testing rig) simultaneously with a single click!

ACCESSORIES / PACKAGE INCLUDED

• 1 x Inline ON-OFF Switch Cable (DC 5.5mm Male to Female, Black)

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What size are the connectors on this cable? They are the industry-standard DC 5.5mm outer diameter by 2.1mm inner pin diameter (often written as 5.5x2.1mm).

2. Can I use this with AC mains power (110V/220V)? No. This switch is strictly designed for low-voltage DC power (typically 5V to 24V). Using it with AC mains voltage is extremely dangerous and a fire hazard.

3. Will this work with my 12V LED strip? Yes, as long as your LED strip's power adapter uses a standard 5.5x2.1mm barrel plug, this will plug in perfectly inline to act as an on/off switch.

4. Does this cable regulate or step down the voltage? No, it is a purely passive mechanical switch. If you put 12V in, you will get 12V out.

5. Is this cable waterproof? No, the rocker switch housing and the barrel connectors are not sealed against water. It is intended for indoor use only.

6. What is the maximum current (Amps) it can handle? It is generally rated to safely handle around 2 to 3 Amps of continuous current. Avoid pulling heavy loads (like 5A or 10A) through it, as the switch contacts may overheat.

7. Can I use this with an Arduino Uno? Yes! The Arduino Uno uses a standard 5.5x2.1mm barrel jack for its VIN power. This switch is perfect for turning your Arduino project on and off without unplugging the battery.

8. Which end goes to the power supply? The female end (the hollow jack) accepts the plug from your wall adapter, while the male end (the plug with the metal barrel) goes to your device.

9. Will this work with a 5V power supply? Yes, it will work perfectly fine with 5V, 9V, 12V, and 24V DC adapters.

10. Does the switch have an LED indicator inside it? No, this is a simple mechanical rocker switch without an internal illumination LED.

11. Does this switch fit a 5.5mm x 2.5mm jack? While the outer diameter (5.5mm) is the same, the inner 2.1mm pin of this cable may not make a reliable, tight connection with a 2.5mm device and could cause power flickering.

12. Is the switch momentary or latching? It is a latching rocker switch; it stays firmly in the ON or OFF position until you physically press it the other way.

13. Can I use this to turn my CCTV camera on and off? Yes, it is perfect for 12V security cameras and DVRs that utilize standard 5.5x2.1mm barrel power connections.

14. Does the switch consume any power when turned off? No, it is a physical mechanical switch that completely breaks the electrical circuit, so there is zero "vampire" power draw when set to OFF.

15. Can I cut the connectors off and hardwire it? Yes, if needed for a custom project, you can snip the barrel jacks off to expose the internal positive and negative wires for direct soldering.

16. What happens if I pull too many amps through it? Exceeding the 3A rating will cause the internal switch contacts and thin wiring to overheat, potentially melting the plastic housing and causing a short circuit.

17. Can I use this to switch audio or video RCA cables? It is highly discouraged. This cable is entirely unshielded and designed for power only; using it for AV signals will introduce severe interference and static.

18. Will this switch cause my LED lights to dim? As long as your LED strip draws less than the maximum rated current (~2A), the switch will not cause any noticeable voltage drop or dimming.

19. Are the connectors center-positive? Yes, as is the industry standard for 5.5x2.1mm barrel jacks, it is wired so the inner pin carries the positive voltage and the outer barrel is the ground/negative.

20. Can I daisy-chain multiple of these together? While mechanically possible, linking multiple switches together adds unnecessary resistance to your circuit and increases the risk of voltage drop, so it is not recommended.