3SM SURFACE MOUNT POWER WIREWOUND RESISTORS

FEATURES

Easy replacement of axial power wirewound resistors without performance loss. Performance improvement is obtained by close tolerance, very low temperature coefficient and stability in operation under severe environmental conditions. High level reliability due to ceramic core chemically inert and centerless ground, selected wire element and completely welded construction terminal to terminal. The whole assembly is silicon coated and thermoplastic V-O, moulded to give maximum wire protection from -55°C to +220°C.

TECHNICAL SPECIFICATIONS

Power Rating:	3 Watt a 70°C mounted on FR4 board 1.6mm
Resistance range:	R10 to 10K. Series E12, others on request
Tolerances:	Standard 5% on request up to 1%
TCR:	Typical values 100 to 30 ppm from R10 to 10K
Maximum continuous working voltage:	173 Vrms
Thermal resistance:	50°C/W
Derating:	linear from 70°C to 220°C
Insulation voltage:	1,000 Vac
Insulation resistance:	1,000 Mohm
Overload:	5 second at 5 times power rating
Non inductive:	Aytron-Perry winding max. 4K7
Weight:	2.5 gr.
Climatic category:	55/220/56
Packaging:	Reel 330bb, blister 32 mm, pitch 12 mm, 750 pcs