SparkFun Soft Power Switch Mk2 – JST 2mm

Description
The SparkFun Soft Power Switch Mk2 is a compact and reliable power-management module designed for embedded electronics and battery-powered systems. It allows controlled power switching without high-current mechanical switches. As a result, devices gain better efficiency, safety, and longer operational life. The integrated JST 2mm connector provides a secure and compact interface for power sources such as LiPo batteries.
The SparkFun Soft Power Switch Mk2 uses a digital-latching circuit. This enables the system to turn on or off with a soft-touch button rather than a bulky toggle or slide switch. Because of this design, users can build sleek devices with clean interfaces. The switch protects electronics by preventing voltage spikes and noisy connections often caused by mechanical switches.
The module supports a wide voltage range. It is compatible with microcontrollers, development boards, and sensor-based systems. Therefore, it works well in IoT devices, portable gadgets, robotics systems, and low-power automation projects. The SparkFun Soft Power Switch Mk2 also ensures stable power delivery, which improves overall system performance.
Integration is simple. Developers only need a momentary pushbutton and a standard battery connection. The JST 2mm connector ensures quick assembly and secure wiring. Moreover, the soft power control reduces wear on components and improves long-term reliability.
The SparkFun Soft Power Switch Mk2 is widely used in handheld electronics, field sensors, smart wearables, and compact robotics. It is especially valuable in projects where space is limited and power must be managed cleanly and safely. The module also helps prevent accidental power drain by ensuring intentional on and off actions.
Overall, the SparkFun Soft Power Switch Mk2 with its JST 2mm interface delivers professional-grade power control for modern embedded systems. Its small size, digital switching, and easy integration make it a dependable choice for engineers, hobbyists, and product designers.
Features & Specs

Input voltage: 5.5V maximum, 1.8V minimum
Maximum current draw: 2A continuous, 4A peak (fuse protected)
SIL2308 N&P-Channel MOSFET
70m? (0.070 Ohm) typical P-Channel on-resistance
Very low quiescent current: <1?A @ 3.75V, with VIN LED disabled Hard override: push and hold the button for ~10 seconds Supports battery charging 1? x 1? PCB LEDs: VIN and VOUT (can be disabled if desired) Breakouts: GND, VIN, VOUT BTN: if desired, connect an external button between BTN and GND PUSH: open-drain output, requires pull-up, low indicates button is pushed OFF: drive high to turn the output off