SDA03H0B DIP Switch Equivalent & Substitute Parts

Part Overview

The SDA03H0B is a slide-actuated DIP switch manufactured by C&K, designed for through-hole mounting applications requiring single-pole single-throw (SPST) switching at 25mA and 24VDC. The device features a 3-position configuration with gold-plated beryllium copper contacts and operates across an industrial temperature range of -40°C to 85°C. This part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified when electrical performance, mechanical interface, and environmental specifications align within acceptable tolerances for direct board-level replacement.

Substiute Parts

SDA03H0B

C&KIn Stock: 996SDA03H0B Datasheet

Current PartRFQ

90B03ST

Grayhill Inc.In Stock: 561690B03ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 90B03ST from Grayhill Inc. qualifies as a direct substitute for the SDA03H0B based on the following critical parameters:

• Electrical Equivalence: Both parts maintain identical SPST circuit configuration, 3-position switching, 25mA current rating, and 24VDC voltage rating
• Mechanical Compatibility: Both employ slide-actuated mechanisms with flush/recessed actuator levels, through-hole mounting, PC pin termination, and 0.100" (2.54mm) pitch spacing
• Environmental Compliance: Both operate across -40°C to 85°C temperature range, carry RoHS3 compliance, MSL 1 rating, and REACH unaffected status
• Washability: Both parts feature tape seal construction and washable design

Dimensional variations exist in height above board (0.183" vs 0.195") and overall length (0.378" vs 0.370"), which remain within acceptable tolerances for standard through-hole PCB applications. Contact material differs (beryllium copper vs copper alloy) and mechanical/electrical life ratings are higher on the substitute (2,000 cycles vs 1,000 cycles), representing equivalent or superior performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the SDA03H0B and 90B03ST maintain active production status with full regulatory compliance. Selection between these parts should be based on:

• Availability: The 90B03ST currently maintains higher inventory levels (5,540 pcs vs 969 pcs)
• Lifecycle Durability: The 90B03ST offers doubled mechanical and electrical life ratings (2,000 cycles vs 1,000 cycles), providing extended operational longevity in high-cycle applications
• Dimensional Fit: PCB layout constraints may favor the SDA03H0B due to its lower profile (0.183" vs 0.195" height above board)
• Regulatory Compliance: Both parts satisfy identical RoHS3, REACH, and MSL requirements for industrial and commercial applications

Frequently Asked Questions (FAQ)

Q: Can the 90B03ST directly replace the SDA03H0B on existing PCBs?

A: Yes. Both parts share identical electrical ratings (SPST, 3-position, 25mA, 24VDC), mechanical interfaces (through-hole, 0.100" pitch, PC pin termination), and actuator characteristics (slide-type, flush/recessed level). Dimensional differences (height and length) fall within standard PCB tolerance ranges for through-hole components.

Q: What are the key differences between these parts?

A: The primary differences are contact material composition (beryllium copper vs copper alloy), body material (PPS vs thermoplastic), and lifecycle ratings. The 90B03ST provides doubled mechanical and electrical life (2,000 vs 1,000 cycles). Height above board differs by 0.012" (0.30mm) and overall length by 0.008" (0.20mm).

Q: Are both parts suitable for washable PCB assembly processes?

A: Yes. Both the SDA03H0B and 90B03ST feature tape seal construction and are rated as washable, supporting standard aqueous and semi-aqueous cleaning processes.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both parts carry identical certifications: RoHS3 compliance, MSL 1 (unlimited moisture sensitivity), REACH unaffected status, and EAR99 export classification. Both operate across -40°C to 85°C temperature range.

Q: Which part should be selected for high-cycle switching applications?

A: The 90B03ST is suitable for applications requiring extended operational life, as it provides 2,000-cycle mechanical and electrical life ratings compared to 1,000 cycles for the SDA03H0B.