SD02H0BD DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The SD02H0BD is a DIP switch manufactured by C&K, featuring a single-pole single-throw (SPST) circuit configuration with 2 positions. This through-hole mounted component is rated for 100mA at 25VDC and utilizes a slide actuator with standard positioning. The product is Active status and RoHS3 compliant, making it suitable for applications requiring compact switching functionality in industrial and commercial electronics.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation at higher electrical ratings while maintaining functional compatibility.

Substiute Parts

SD02H0BD

C&KIn Stock: 1082SD02H0BD Datasheet

Current PartRFQ

76RSB02T

Grayhill Inc.In Stock: 120776RSB02T Datasheet

SimilarRFQ

78RB02T

Grayhill Inc.In Stock: 134478RB02T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD02H0BD is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPST
• Number of positions must be 2
• Mounting type must be Through Hole
• Pitch must be 0.100" (2.54mm)
• Actuator level must be Flush or Recessed

Allowable Parameter Variations:

• Current rating may exceed 100mA (higher ratings provide backward compatibility)
• Voltage rating may exceed 25VDC (higher ratings provide backward compatibility)
• Actuator type may differ (Slide vs. Rocker) provided mechanical envelope permits board-level integration
• Contact material and body material may vary
• Height above board may vary within PCB assembly constraints

The substitute parts 76RSB02T and 78RB02T satisfy all primary compatibility criteria while offering enhanced electrical ratings (150mA at 30VDC), ensuring functional interchangeability in applications designed for the SD02H0BD.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain Active product status and full RoHS3 compliance, ensuring regulatory alignment with the original SD02H0BD specification.

76RSB02T Selection Considerations: This Grayhill rocker-actuated DIP switch provides 150mA at 30VDC ratings. The rocker actuator differs mechanically from the slide actuator of the SD02H0BD. Height above board is 0.292" (7.41mm), compared to 0.168" (4.27mm) for the original part. This increased profile requires verification of available PCB assembly space and clearance to adjacent components.

78RB02T Selection Considerations: This Grayhill slide-actuated DIP switch maintains the same actuator type as the SD02H0BD while providing 150mA at 30VDC ratings. Height above board is 0.265" (6.73mm), representing a moderate increase from the original 0.168" (4.27mm). The slide actuator provides direct functional equivalence in terms of user interface and actuation method.

Both substitutes are suitable for applications where the original SD02H0BD encounters supply limitations, provided PCB layout accommodates the increased component height and the application does not require the specific contact material (Beryllium Copper) of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 76RSB02T or 78RB02T be used as direct replacements for the SD02H0BD?

A: Both parts satisfy the core substitution criteria: SPST circuit, 2 positions, through-hole mounting, and 0.100" pitch. The primary design consideration is PCB clearance, as both substitutes have greater height above board than the original part. The 78RB02T maintains identical actuator type (slide), while the 76RSB02T uses a rocker actuator.

Q: What are the electrical compatibility differences?

A: The SD02H0BD is rated for 100mA at 25VDC. Both substitutes are rated for 150mA at 30VDC. These higher ratings provide backward compatibility—applications designed for the original part will operate within the electrical envelope of the substitutes. No circuit modification is required.

Q: Does the change in actuator type affect functionality?

A: The 78RB02T maintains the slide actuator of the original SD02H0BD, providing identical user interface and actuation feel. The 76RSB02T uses a rocker actuator, which requires different physical actuation but provides equivalent electrical switching function. Actuator selection depends on user preference and PCB layout constraints.

Q: Are there height clearance concerns?

A: The SD02H0BD has a height of 0.168" (4.27mm). The 78RB02T measures 0.265" (6.73mm), and the 76RSB02T measures 0.292" (7.41mm). PCB designs with tight vertical clearance to overlying components or enclosure lids must be evaluated for compatibility with the taller substitute parts.

Q: Do the substitutes maintain the same compliance certifications?

A: Yes. Both 76RSB02T and 78RB02T are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the SD02H0BD.

Q: What contact material differences exist?

A: The SD02H0BD uses Beryllium Copper contacts with gold finish. Both substitutes use Copper Alloy contacts with gold finish. For applications with specific contact material requirements, this difference must be evaluated against application performance criteria.