Your rating of Vcc up to 25v or 40v is wrong. When running at Vcc = 15v, I experienced a short circuit across the supply in first case and in second case, a bang and a flash of light when a component blew up ! These devices have a 10 volt capacitor across the supply voltage - any attempt to run above 10v will blow this component. This happened twice before I realised the source of the problem. I have replaced the surface mount 10v 47uf capacitor with a 25v 47uf radial capacitor. Once modified they seem to operate well.

Your rating of Vcc up to 25v or 40v is wrong. When running at Vcc = 15v, I experienced a short circuit across the supply in first case and in second case, a bang and a flash of light when a component blew up ! These devices have a 10 volt capacitor across the supply voltage - any attempt to run above 10v will blow this component. This happened twice before I realised the source of the problem. I have replaced the surface mount 10v 47uf capacitor with a 25v 47uf radial capacitor. Once modified they seem to operate well.

Your rating of Vcc up to 25v or 40v is wrong. When running at Vcc = 15v, I experienced a short circuit across the supply in first case and in second case, a bang and a flash of light when a component blew up ! These devices have a 10 volt capacitor across the supply voltage - any attempt to run above 10v will blow this component. This happened twice before I realised the source of the problem. I have replaced the surface mount 10v 47uf capacitor with a 25v 47uf radial capacitor. Once modified they seem to operate well.

Very nice product. Exactly as advertised.

Very nice product. Exactly as advertised.

Very nice product. Exactly as advertised.

Excellent PCB material, good performance.

Excellent PCB material, good performance.

Excellent PCB material, good performance.

good devices

good devices

good devices