SD08H0BD DIP Switch SPST 8 Position Equivalent & Substitute Parts

Part Overview

The SD08H0BD is an 8-position DIP switch manufactured by C&K, featuring SPST (Single Pole Single Throw) circuit configuration with slide actuator operation. This component is rated for 100mA at 25VDC and is designed for through-hole PCB mounting with 0.100" pitch spacing. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when design requirements permit tolerance of electrical and mechanical parameter variations while maintaining functional compatibility within the application's operational envelope.

Substiute Parts

SD08H0BD

C&KIn Stock: 1206SD08H0BD Datasheet

Current PartRFQ

1825057-7

TE Connectivity ALCOSWITCH SwitchesIn Stock: 947661825057-7 Datasheet

SimilarRFQ

76RSB08T

Grayhill Inc.In Stock: 606676RSB08T Datasheet

SimilarRFQ

78RB08T

Grayhill Inc.In Stock: 128378RB08T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD08H0BD is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Circuit configuration: SPST
• Number of positions: 8
• Mounting type: Through hole
• Pitch spacing: 0.100" (2.54mm)
• Contact finish: Gold
• RoHS3 compliance
• Product status: Active

Allowable Parameter Variations:

• Current rating: Equal to or greater than 100mA
• Voltage rating: Equal to or greater than 25VDC
• Operating temperature range: Must encompass or exceed -40°C to 85°C
• Actuator type: Slide or rocker configurations
• Mechanical and electrical life: Equal to or greater than 2,000 cycles
• Contact material: Beryllium copper or copper alloy
• Body material: Polyphthalamide, polyphenylene sulfide, or thermoplastic

The three identified substitute parts meet these criteria with enhanced electrical ratings and equivalent mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

1825057-7 (TE Connectivity ALCOSWITCH): This substitute maintains identical current and voltage specifications to the SD08H0BD with slide actuator configuration. The part features washable design capability and polyphenylene sulfide body material. Mechanical and electrical life ratings are reduced to 1,000 cycles compared to the original 2,000 cycles. Operating temperature range is limited to -30°C to 85°C, excluding the lower temperature extreme of the original specification. All parts maintain Active product status and ROHS3 compliance.

76RSB08T (Grayhill Inc.): This substitute provides enhanced electrical ratings of 150mA at 30VDC, exceeding the original 100mA at 25VDC specification. The rocker actuator differs from the slide actuator of the SD08H0BD. Mechanical and electrical life ratings match the original at 2,000 cycles. Operating temperature range and RoHS3 compliance align with the original specification. Height above board is increased to 0.292" compared to 0.168" for the original part.

78RB08T (Grayhill Inc.): This substitute provides enhanced electrical ratings of 150mA at 30VDC with slide actuator configuration matching the original actuator type. Mechanical and electrical life ratings match the original at 2,000 cycles. Operating temperature range and RoHS3 compliance align with the original specification. Height above board is increased to 0.265" compared to 0.168" for the original part.

All substitute parts maintain through-hole mounting with 0.100" pitch spacing, gold contact finish, and Active product status required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1825057-7 be used as a direct replacement for the SD08H0BD in all applications?

A: The 1825057-7 is electrically compatible for applications operating within -30°C to 85°C. Applications requiring operation below -30°C or exceeding 1,000 mechanical/electrical cycles require evaluation against specific design requirements. The washable design feature of the 1825057-7 provides additional capability not present in the original part.

Q: What is the primary difference between the 76RSB08T and 78RB08T substitutes?

A: The 76RSB08T features a rocker actuator while the 78RB08T features a slide actuator matching the original SD08H0BD. Both provide identical electrical ratings of 150mA at 30VDC and 2,000-cycle life ratings. The rocker actuator of the 76RSB08T results in increased height above board of 0.292" versus 0.265" for the 78RB08T.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SD08H0BD and all three substitute parts (1825057-7, 76RSB08T, 78RB08T) maintain ROHS3 compliance and REACH unaffected status.

Q: Can substitutes with higher voltage and current ratings be used in place of the SD08H0BD?

A: Yes. The 76RSB08T and 78RB08T, both rated for 150mA at 30VDC, are suitable for applications originally specified for 100mA at 25VDC. Enhanced ratings provide design margin without compromising functionality.

Q: What PCB layout considerations apply when substituting the 78RB08T for the SD08H0BD?

A: Both parts maintain 0.100" pitch spacing and through-hole mounting. The 78RB08T height above board is 0.265" compared to 0.168" for the SD08H0BD. PCB clearance above the switch must accommodate the increased height to prevent mechanical interference.

Q: Is the mechanical life rating difference between the 1825057-7 and SD08H0BD significant?

A: The 1825057-7 is rated for 1,000 mechanical cycles compared to 2,000 cycles for the SD08H0BD. Applications with cycle counts approaching or exceeding 1,000 operations require evaluation of the reduced life rating against expected product lifetime requirements.