Does the module draw current when in the open state? If so, how much current is drawn.

I haven't measured it's current draw when the relay is off, but I could almost bet this only takes a few milliamps. That 8-pin controller chip is not going to draw much energy. The biggest current draw is when the relay coil is turned on - probably 80 or 100 mA for the coil.

Will this switch reset if the dc power is removed?

Yes they revert to default when power is removed

Is this limited to a 30v dc application or can i use this to switch my 12v dc devices? if so, what is the amp rating for a 12v dc device? thanks!

Contact Type Normally Open Current Rating 10 Amps Brand HiLetgo Coil Voltage 12 Volts Contact Current Rating 10 Amps Maximum Switching Current 10 Amps

How would one orient a polarized 0.1uF capacitor in the momentary switch circuit?

If you are suppressing transients then the cap should be connected between line and ground in a DC circuit.

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HiLetgo 2pcs 12V Single Bistable Self-Locking Relay Module Push to Start and Stop

Product ID: 45094942

Details

Connector Type
Screw
Contact Material
Silver
Contact Type
Normally Open
Current Rating
10 Amps
Mounting Type
Surface Mount

⚡12V Power

🔄Bistable Function

🔒Self-Locking Feature

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HK$139

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In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Connector Type
Screw
Contact Material
Silver
Contact Type
Normally Open

Description

🔧 Unlock Your Control with Precision!

🔒 SECURE OPERATION - Self-locking mechanism ensures your devices stay in the desired state.
📈 RELIABLE PERFORMANCE - Engineered for durability and consistent performance in various environments.
🛠️ EASY INSTALLATION - Designed for hassle-free setup, perfect for DIY enthusiasts and professionals alike.
🔌 INSTANT POWER CONTROL - Easily manage your devices with a simple push to start and stop.
🔄 DUAL STATE FUNCTIONALITY - Enjoy the convenience of bistable operation for versatile applications.

The HiLetgo 2pcs 12V Single Bistable Self-Locking Relay Module is a versatile and reliable solution for managing electrical devices. With its bistable function and self-locking feature, this module allows for easy push-to-start and stop control, making it ideal for both professional and DIY applications.

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