B0505S-1WR3 R3 B0505/09/12/15/24S-1WR3 DC-DC Isolated Power Module 4Pin 5V to 9V/111mA 1W Power Supply Module for Smart Home

Features:

1W constant voltage input, isolated unregulated single output

4Pin SIP international standard pins

Continuous short circuit protection

High conversion efficiency up to 88%

No-load input current as low as 5mA 

Isolated voltage 1500VDC 

Operating temperature range -40°C~+85°C

* Input requirements: the output voltage fluctuation range of the power supply 

must not exceed the input requirements of the module itself, 

and the output power of the input power supply must be greater than the output power of the module.

*Output load requirements: Try to avoid no-load use, 

when the actual power consumption of the load is less than 10% of the rated power of the module, 

it is recommended that the output side of the external load 

(calculated according to the module's rated power of 5 ~ 10%), 

such as the resistance value = U out2 / (2W * 10%).

*Overload protection: general product output circuit without overload protection, 

need to look at the product and specifications.

Simple way, can be connected in series with the input side of a self-resilient fuse or 

an external circuit breaker, external circuit can look at the reference circuit of the product.

*Other related: the external capacitance of the output terminal should not be too large, 

otherwise it will easily cause the module to start overcurrent or poor start-up.