SD02H1B DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The SD02H1B is an active-status DIP switch manufactured by C&K, configured as a single-pole single-throw (SPST) switch with 2 positions. This component is designed for through-hole mounting applications requiring reliable switching at 100mA and 25VDC. The slide actuator design with raised level provides tactile feedback for manual position selection. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

SD02H1B

C&KIn Stock: 982SD02H1B Datasheet

Current PartRFQ

76SB02ST

Grayhill Inc.In Stock: 631176SB02ST Datasheet

SimilarRFQ

78B02ST

Grayhill Inc.In Stock: 936378B02ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD02H1B are identified based on the following critical parameters that determine functional equivalence:

Circuit configuration (SPST), number of positions (2), mounting type (through hole), pitch (0.100"), and operating temperature range (-40°C ~ 85°C) must match exactly. Current and voltage ratings must meet or exceed the original specification. Contact material, finish, and mechanical/electrical life cycles are secondary considerations that do not prevent substitution when primary parameters align. Actuator type differences (slide versus rocker) are acceptable variations provided all other mechanical and electrical parameters remain compatible.

The substitute parts identified are:

• 76SB02ST (Grayhill Inc., rocker actuator variant)
• 78B02ST (Grayhill Inc., slide actuator variant)

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts (76SB02ST and 78B02ST) are active-status components with ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the SD02H1B. The substitute parts provide higher current ratings (150mA versus 100mA) and higher voltage ratings (30VDC versus 25VDC), making them suitable for applications where the original part is specified.

The 78B02ST maintains the slide actuator configuration of the original SD02H1B, providing identical user interface characteristics. The 76SB02ST uses a rocker actuator, which represents a mechanical variation that may affect PCB layout and user interaction but does not impact electrical function.

Both substitutes have increased height above board (0.315" versus 0.178"), which must be evaluated against available PCB clearance in the target application. All three parts share identical pitch (0.100"), termination style (PC Pin), and operating temperature range, ensuring mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 76SB02ST replace the SD02H1B in all applications? A: The 76SB02ST is electrically compatible with higher current and voltage ratings. The rocker actuator differs from the slide actuator, requiring evaluation of PCB layout and user interface requirements. The increased height above board (0.315" versus 0.178") must be verified against available clearance.

Q: What is the primary difference between the two substitute parts? A: The 78B02ST uses a slide actuator matching the SD02H1B configuration, while the 76SB02ST uses a rocker actuator. Both are manufactured by Grayhill Inc. and provide identical electrical ratings (150mA, 30VDC).

Q: Are the substitute parts pin-compatible with the SD02H1B? A: Yes. All three parts share 0.100" (2.54mm) pitch, PC Pin termination, and through-hole mounting, ensuring footprint compatibility on standard DIP switch PCB layouts.

Q: Do the substitute parts meet the same regulatory requirements? A: Yes. Both 76SB02ST and 78B02ST are ROHS3 compliant and REACH unaffected, matching the compliance profile of the SD02H1B.

Q: What is the impact of higher current and voltage ratings on substitution? A: Higher ratings (150mA at 30VDC versus 100mA at 25VDC) provide design margin and do not prevent substitution. The original circuit design remains fully functional with substitute parts rated for higher electrical stress.

Q: How do contact material differences affect substitution? A: The SD02H1B uses beryllium copper contacts while substitutes use copper alloy contacts. Both materials with gold finish provide reliable switching performance and do not prevent functional substitution.