Surface mount wirewound resistor and method of making the same

Details Surface mount wirewound resistor and method of making the same Surface mount wirewound resistor and method of making the same

1988-08-26

1989-11-28

Albritton, C. L.

Electrical resistors

Incased, embedded, or housed

Casing or housing formed on and hardened on resistor

338301, 338332, 361404, 361405, 361417, H01C 1034

Patent

active

048840530

ABSTRACT:
A surface mount wirewound resistor having a conventional wirewound resistor embedded in a plastic body member with terminal axial leads of the resistor being severed at the opposite ends of the body member. A U-shaped metallic terminal pad or clip is secured to the ends of the body member and is in electrical contact with the severed ends of the axial leads. The upper and lower portions of the terminal pad are in coplanar relationship with the upper and lower surfaces of the body member. An alternate surface mount wirewound resistor has metallic tabs that extend from the resistance element embedded in the plastic body member, with the tabs being bent upwardly from the ends thereof and into coplanar relationship with the upper surface of the body member. The method of making a surface mount wirewound resistor entails embodying the resistor having axial leads within a plastic body member, severing the axial leads at the opposite ends of the body member, and then placing terminal pads on the ends of the body member in contact with the severed axial leads. An alternate method suspends the resistor without axial leads between opposite sides of a metallic lead frame by securing the end caps of the resistance element to protruding terminal tabs. The resistance element is then embedded in a plastic body member, the terminal tabs are then severed from the lead frame and bent into coplanar relationship with the upper surface of the body member.

REFERENCES:
patent: 3611275 (1971-10-01), Leddy et al.
patent: 4333069 (1982-06-01), Worth et al.
patent: 4574297 (1986-03-01), Ooi
patent: 4641222 (1987-02-01), Derfiny et al.
patent: 4672358 (1987-06-01), Pryst et al.

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