DSR02T DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The DSR02T is a slide-actuated DIP switch manufactured by APEM Inc., configured as a single-pole single-throw (SPST) switch with 2 positions. This component is rated for 50mA at 24VDC and features through-hole mounting with PC pin termination. The DSR02T is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

DSR02T

APEM Inc.In Stock: 820DSR02T Datasheet

Current PartRFQ

78RB02ST

Grayhill Inc.In Stock: 585878RB02ST Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSR02T with the 78RB02ST is based on the following allowed electrical and mechanical parameters:

• Circuit Configuration: Both parts are SPST switches with identical functional topology
• Number of Positions: Both feature 2-position switching capability
• Actuator Type: Both use slide-actuated mechanisms with flush, recessed actuator levels
• Mounting Type: Both are through-hole mounted components
• Pitch: Both maintain 0.100" (2.54mm) full pitch spacing
• Contact Finish: Both feature gold-plated contacts
• Termination Style: Both use PC pin termination

The 78RB02ST exceeds the electrical specifications of the DSR02T (150mA at 30VDC versus 50mA at 24VDC), making it suitable for applications requiring the DSR02T's performance envelope. Physical dimensions vary slightly, but both components maintain compatible through-hole footprints and pitch specifications.

Parameter Comparison

Engineering Selection Recommendations

The 78RB02ST serves as a direct functional substitute for the obsolete DSR02T. Both components meet ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The 78RB02ST is classified as active product status, providing long-term availability and supply chain stability compared to the DSR02T's obsolete classification.

The 78RB02ST's higher current rating (150mA versus 50mA) and voltage rating (30VDC versus 24VDC) provide operational margin for the DSR02T's application envelope. The extended operating temperature range (-40°C to 85°C versus -20°C to 70°C) accommodates broader environmental conditions. Physical height difference (0.265" versus 0.222") requires PCB layout verification for clearance-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the 78RB02ST directly replace the DSR02T in existing designs?

A: The 78RB02ST is electrically and mechanically compatible with the DSR02T for applications operating within the DSR02T's specified parameters (50mA, 24VDC). PCB layout verification is required due to the 0.043" height difference above the board.

Q: What are the key compatibility criteria for DIP switch substitution?

A: Circuit configuration (SPST), number of positions (2), actuator type (slide), mounting type (through hole), pitch (0.100"), and termination style (PC pin) must match. The substitute part's electrical ratings must equal or exceed the original part's requirements.

Q: Does the 78RB02ST meet the same compliance standards as the DSR02T?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Both feature MSL rating 1 (unlimited moisture sensitivity level).

Q: What is the impact of the different contact materials?

A: The DSR02T uses phosphor bronze contacts while the 78RB02ST uses copper alloy contacts. Both are gold-finished and suitable for the specified electrical parameters. Contact material selection does not affect substitution validity for the stated application envelope.

Q: Are there packaging differences between these parts?

A: The DSR02T packaging is listed as standard, while the 78RB02ST is supplied in tube packaging. This affects procurement and handling but does not impact electrical or mechanical compatibility.