SDA03H0K Equivalent & Substitute Parts

Part Overview

The SDA03H0K is a DIP slide switch manufactured by C&K, featuring SPST (Single Pole Single Throw) configuration with 3 positions, rated for 25mA at 24VDC. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The SDA03H0B serves as the direct successor, offering improved compliance and material specifications while maintaining core electrical and mechanical compatibility.

Substiute Parts

SDA03H0K

C&KIn Stock: 1119SDA03H0K Datasheet

Current PartRFQ

SDA03H0B

C&KIn Stock: 996SDA03H0B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between SDA03H0K and SDA03H0B is permissible based on the following criteria:

Electrical Parameters (Identical):

• Circuit configuration: SPST
• Number of positions: 3
• Current rating: 25mA
• Voltage rating: 24VDC
• Contact material: Beryllium Copper
• Contact finish: Gold
• Mechanical life: 1,000 Cycles
• Electrical life: 1,000 Cycles

Mechanical Parameters (Compatible):

• Actuator type: Slide (Standard)
• Mounting type: Through Hole
• Pitch: 0.100" (2.54mm)
• Termination style: PC Pin
• Washable: Yes
• Features: Tape Seal

Dimensional Variance (Acceptable):

• Height above board: 0.189" (4.80mm) vs. 0.183" (4.65mm) — within tolerance for standard PCB clearance
• Length: 0.378" (9.60mm) — identical

The SDA03H0B represents an active product with enhanced material composition and regulatory compliance, making it the recommended direct replacement for the obsolete SDA03H0K.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: Specify SDA03H0B. This part is in active production status with ROHS3 compliance, ensuring long-term availability and regulatory alignment with current manufacturing standards.

For Legacy System Maintenance: SDA03H0K can be replaced with SDA03H0B without circuit redesign. The electrical and mechanical parameters are functionally equivalent. The material change from PPA to PPS in the SDA03H0B provides improved thermal stability and chemical resistance, with no negative impact on performance in the specified operating range.

Compliance Consideration: If the original design was RoHS non-compliant by specification, the SDA03H0B's ROHS3 compliance represents an improvement. No functional degradation occurs from this substitution.

Temperature Range: The SDA03H0B extends the lower operating temperature limit to -40°C, providing additional margin for cold environment applications. This is a beneficial enhancement over the SDA03H0K's -20°C minimum.

Frequently Asked Questions (FAQ)

Q: Can SDA03H0B be used as a direct replacement for SDA03H0K in existing assemblies?

A: Yes. The electrical ratings (25mA, 24VDC, SPST, 3-position), mechanical configuration (through-hole, 0.100" pitch, PC pin termination), and contact specifications (beryllium copper, gold finish) are identical. The dimensional difference in height (0.189" vs. 0.183") is within standard PCB clearance tolerances and does not affect board-level compatibility.

Q: What is the significance of the body material change from PPA to PPS?

A: Polyphenylene Sulfide (PPS) offers superior thermal stability and chemical resistance compared to Polyphthalamide (PPA). This material upgrade enhances long-term reliability without affecting electrical performance or mechanical function within the specified operating parameters.

Q: Why is SDA03H0K listed as obsolete?

A: The SDA03H0K has been superseded by the SDA03H0B in C&K's product line. The SDA03H0B provides equivalent functionality with improved regulatory compliance (ROHS3) and material specifications, making it the current production standard.

Q: Does the extended temperature range of SDA03H0B (-40°C to 85°C vs. -20°C to 85°C) affect compatibility?

A: No. The extended lower temperature limit in SDA03H0B is a beneficial enhancement. If the original application operated within -20°C to 85°C, the SDA03H0B will perform identically. If the application requires operation below -20°C, the SDA03H0B provides additional margin.

Q: Are there packaging differences between SDA03H0K and SDA03H0B?

A: The SDA03H0K packaging is listed as "-" (unspecified), while SDA03H0B is supplied in Tube packaging. Both parts use identical PC pin termination and pitch specifications. Tube packaging is standard for active production components and does not affect electrical or mechanical compatibility.

Q: What is the mechanical life expectancy for both parts?

A: Both SDA03H0K and SDA03H0B are rated for 1,000 mechanical cycles and 1,000 electrical cycles. This specification is identical across both parts.

Q: Is the SDA03H0B suitable for applications requiring RoHS compliance?

A: Yes. The SDA03H0B is ROHS3 compliant, meeting current regulatory requirements. The SDA03H0K is RoHS non-compliant, making the SDA03H0B the appropriate choice for new designs or systems requiring RoHS certification.