SDB04H1BD DIP Switch SPST 4 Position Equivalent & Substitute Parts

Part Overview

The SDB04H1BD is a DIP switch manufactured by C&K, configured as a single-pole single-throw (SPST) switch with 4 positions. This component is rated for 25mA at 24VDC and features a slide actuator with gold-plated phosphor bronze contacts. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

SDB04H1BD

C&KIn Stock: 903SDB04H1BD Datasheet

Current PartRFQ

SDA04H1BD

C&KIn Stock: 46643SDA04H1BD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SDB04H1BD is determined by the following critical parameters that must remain constant:

• Circuit configuration: SPST (single-pole single-throw)
• Number of positions: 4
• Current rating: 25mA minimum
• Voltage rating: 24VDC minimum
• Actuator type: Slide (Standard)
• Mounting type: Through Hole
• Pitch: 0.100" (2.54mm)
• Operating temperature range: -40°C to 85°C minimum
• RoHS compliance: ROHS3 Compliant

The SDA04H1BD qualifies as a direct substitute based on these parameters. While certain mechanical and material specifications differ (contact material, body material, height above board), these variations remain within acceptable tolerances for functional equivalence in the specified electrical and thermal operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The SDA04H1BD is the qualified substitute for the obsolete SDB04H1BD. Both components maintain identical electrical specifications (SPST, 4 positions, 25mA, 24VDC) and thermal operating range (-40°C to 85°C). Both are ROHS3 compliant and carry the same ECCN and HTSUS classifications.

The SDA04H1BD is currently in active production status with substantial inventory availability (46,566 pieces), whereas the SDB04H1BD is obsolete with limited remaining stock (844 pieces). The SDA04H1BD employs beryllium copper contacts and polyphenylene sulfide body material in place of the phosphor bronze contacts and polyamide body of the original part. These material substitutions do not affect functional compatibility within the specified electrical and environmental parameters.

Physical dimensions show minor variations: the SDA04H1BD is 0.049" (1.24mm) taller and 0.033" (0.84mm) longer than the SDB04H1BD. These dimensional differences must be evaluated against specific PCB layout and enclosure constraints in the target application.

Frequently Asked Questions (FAQ)

Q: Can the SDA04H1BD directly replace the SDB04H1BD in existing designs?

A: The SDA04H1BD meets all critical electrical and thermal specifications of the SDB04H1BD. However, the dimensional differences (height and length) require verification against PCB layout and mechanical clearance requirements before implementation.

Q: What are the key differences between these two parts?

A: The primary differences are contact material (phosphor bronze versus beryllium copper), body material (polyamide versus polyphenylene sulfide), and physical dimensions. Electrical performance and operating range remain identical.

Q: Why is the SDB04H1BD classified as obsolete?

A: The SDB04H1BD is no longer in active production. The SDA04H1BD represents the current production equivalent from C&K.

Q: Are both parts RoHS compliant?

A: Yes, both the SDB04H1BD and SDA04H1BD are ROHS3 compliant.

Q: What packaging is available for the substitute part?

A: The SDA04H1BD is supplied in tube packaging.

Q: Do these parts have the same moisture sensitivity rating?

A: Yes, both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints.