Adjustable wirewound resistors VISHAY RSSD25168A27R0JB00 offering long term stability and precise tapping collars

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Product Description

Product Overview

The Vishay Sfernice RSSD series offers industrial high-power, vitreous tubular, adjustable wirewound resistors designed for demanding applications. These resistors are noted for their ability to withstand heavy transient and severe shock and vibration conditions, featuring high power ratings from 16 W to 600 W at 25 C. They are suitable for low ohmic values and offer high long-term stability and excellent resistance to thermal shock. The adjustable collars allow for precise tapping.

Product Attributes

Brand: Vishay Sfernice
Material: WELDED STAINLESS STEEL 304 L COLLARS, SCREWED STAINLESS STEEL 304 L COLLARS
Mechanical Protection: Vishay Sfernice special cement
Resistive Element: Nickel alloy wire
Connections: AN collars, CS supporting collars
Certifications: NF F 16101, 10/1988 and 16102, 04/1992: Not applicable
Material categorization: for definitions of compliance please see www.vishay.com/doc?99912

Technical Specifications

Model Size	Resistance Range	Rated Power P25 C W	Tolerance %	Approx. Average Unit Weight g
RSSD 8 x 34	0.12 to 10	16	5, 10 , 20	10
RSSD 10 x 50	0.12 to 22	25	5, 10 , 20	22
RSSD 13 x 70	0.12 to 43	42	5, 10 , 20	38
RSSD 16 x 94	0.33 to 75	70	5, 10 , 20	55
RSSD 20 x 117	0.22 to 100	100	5, 10 , 20	80
RSSD 25 x 138	0.10 to 150	140	5, 10 , 20	90
RSSD 25 x 168	0.12 to 220	200	5, 10 , 20	115
RSSD 30 x 250	0.22 to 360	280	5, 10 , 20	240
RSSD 40 x 370	0.47 to 470	450	5, 10 , 20	845
RSSD 50 x 373	0.68 to 560	600	5, 10 , 20	1270

Performance Tests

Test	Conditions	Requirements	Typical Values and Drifts
Short Time Overload	10 Pr during 5 s	2 %	1 %
Climatic Sequence	-55 C, +200 C 5 cycles	3 %	1 %
Thermal Shock	Load at 100 % Pr followed by cold -55 C / 15 min	2 % or 0.05	1 %
Load Life	90 / 30 cycle 1000 h at Pr at +25 C	5 %	5 %