SD03H0K DIP Switch Equivalent & Substitute Parts

Part Overview

The SD03H0K is a slide-actuated DIP switch manufactured by C&K, designed for through-hole mounting applications requiring SPST (Single Pole Single Throw) switching at 100mA and 25VDC. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing production support, design updates, and inventory management. The obsolete status necessitates evaluation of active alternatives that maintain electrical and mechanical compatibility with existing circuit designs.

Substiute Parts

SD03H0K

C&KIn Stock: 891SD03H0K Datasheet

Current PartRFQ

SD03H0B

C&KIn Stock: 1031SD03H0B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD03H0K with the SD03H0B is based on equivalence across all critical electrical and mechanical parameters. Both components share identical specifications for circuit configuration (SPST), position count (3), current rating (100mA), voltage rating (25VDC), actuator type (slide standard), mounting method (through hole), pitch (0.100"), height above board (0.178"), termination style (PC pin), operating temperature range (-40°C to 85°C), and mechanical/electrical life cycles (2,000 each).

The SD03H0B represents an active product variant within the same SD series base platform, offering direct functional replacement while providing improved compliance status and material upgrades. Substitution is valid when the following parameters are maintained: SPST circuit, 3-position configuration, 100mA current capacity, 25VDC voltage rating, slide actuator, through-hole mounting, 0.100" pitch, and PC pin termination.

Parameter Comparison

Engineering Selection Recommendations

The SD03H0B is the direct active substitute for the obsolete SD03H0K. Selection of the SD03H0B is supported by the following factors:

Product Status: The SD03H0B maintains active product status, ensuring continued availability and manufacturer support, whereas the SD03H0K is obsolete and subject to supply discontinuation.

Regulatory Compliance: The SD03H0B achieves ROHS3 compliance, meeting current environmental and hazardous substance restrictions. The SD03H0K is RoHS non-compliant, presenting regulatory risk in applications subject to RoHS requirements.

Electrical and Mechanical Equivalence: Both components maintain identical electrical ratings (100mA, 25VDC, SPST), mechanical configuration (3-position, slide actuator, through-hole mounting), and operational characteristics (2,000-cycle life, -40°C to 85°C operating range).

Material Enhancement: The SD03H0B employs Beryllium Copper contacts and Polyphthalamide (PPA) body material compared to the SD03H0K's Copper Alloy contacts and Polybutylene Terephthalate (PBT) body. These material upgrades provide improved contact reliability and thermal stability.

Physical Compatibility: Identical pitch (0.100"), height above board (0.178"), length (0.358"), and termination style (PC pin) ensure direct PCB footprint compatibility without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the SD03H0B be used as a direct replacement for the SD03H0K without PCB modification?

A: Yes. The SD03H0B maintains identical pitch (0.100"), height above board (0.178"), length (0.358"), and PC pin termination, ensuring direct footprint compatibility. No PCB layout changes are required.

Q: What are the key electrical differences between SD03H0K and SD03H0B?

A: There are no electrical differences. Both components are rated for 100mA at 25VDC in SPST configuration with 3 positions. Electrical life and mechanical life specifications are identical at 2,000 cycles each.

Q: Why does the SD03H0B use different contact and body materials?

A: The SD03H0B employs Beryllium Copper contacts and Polyphthalamide (PPA) body material as material enhancements within the active product line. These materials provide improved contact durability and thermal performance while maintaining electrical equivalence.

Q: Is the SD03H0B suitable for applications requiring RoHS compliance?

A: Yes. The SD03H0B is ROHS3 compliant. The SD03H0K is RoHS non-compliant and should not be used in applications subject to RoHS requirements.

Q: Are there packaging differences between the two parts?

A: The SD03H0K is supplied with standard packaging (dash notation). The SD03H0B is supplied in tube packaging. Both components are identical in electrical and mechanical specifications; packaging selection depends on assembly process requirements.

Q: What is the operating temperature range for both components?

A: Both the SD03H0K and SD03H0B operate across -40°C to 85°C. Moisture sensitivity level is 1 (Unlimited) for both components.

Q: Are both components washable?

A: Yes. Both the SD03H0K and SD03H0B feature tape seal and are washable, supporting standard PCB cleaning processes.