Surge resistors

The SR Series of Surge Resistors for PCB mounting are manufactured from a carefully selected mixture of clays, alumina and carbon. After blending, the material is pressed to the required shape and then fired, in a controlled atmosphere, at high temperature. This sintering process produces a Ceramic Carbon Resistor which is 100% active material and therefore of minimum size. The SR Series feature Gold Plated Brass spring pin terminations for ease of assembly into Printed Circuit Boards (PCB’s). Dielectric withstand and mechanical robustness are enhanced by the UL94 V-0 approved epoxy resin coating. Compact in size and with high surge energy rating, the modular SR Series is designed to provide the optimum solution to many Power Electronics applications; notably soft starting the DC link capacitors in Switch Mode Power Supplies. Inherently non-inductive and capable of withstanding transient high voltage impulses, the SR Series is similarly effective with respect to overvoltage protection and crowbar discharge applications.

Res. TypeDim. CodeOverall Dimensions
Do Max
Overall Dimensions
Lo Max
Overall Dimensions
Lp Pitch
Vol. (V)
Max. J.
@25°C (J)
Max. W
@25°C (W)
( t )
Resistance Range
MIN (Ohms)
Resistance Range
MAX (Ohms)
For SR Surge Resistors with Surge Energy Rating 250 J - 650 J
SR03251114131814 - 151.33251.751854.00.715R06K8Download
SR04001117132117 - 181.64002.002005.00.618R08K2Download
SR05501414161814 - 152.25502.252456.51.110R04K7Download
SR06501417162117 - 182.66502.502607.00.912R05K6Download
For SR Surge Resistors with Surge Energy Rating 660 J - 1.8 kJ
SR10001914211814 - 154.010003.5028510.52.05R62K7Download
SR12001917212117 - 184.812003.7532013.01.76R83K3Download
SR14251920212420 - 215.714254.2533515.01.48R23K9Download
SR17751925212925 - 267.117755.0035518.01.110R04K7Download
For SR Surge Resistors with Surge Energy Rating 1.9 kJ - 10.4 kJ
SR22502420262420 - 219.022505.7539022.52.34R72K2Download
SR28252425262925 - 2611.328256.5043528.01.85R62K7Download
SR35002431263531 - 3214.035007.5046534.01.56R83K3Download
SR41752437264137 - 3816.741758.5049040.01.210R04K7Download
SR52002446265046 - 4720.8520010.0052050.01.010R04K7Download
SR69753137334137 - 3827.9697511.5060566.02.05R62K7Download
SR86753146335046 - 4734.7867513.2565581.51.66R83K3Download
SR103753155335955 - 5641.51037515.2568097.01.48R23K9Download