DSR04T DIP Switch SPST 4-Position Equivalent & Substitute Parts

Part Overview

The DSR04T is a 4-position DIP switch manufactured by APEM Inc., configured as a single-pole single-throw (SPST) switch with a slide actuator. This component is rated for 50mA at 24VDC and features through-hole mounting with PC pin termination. The DSR04T is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

DSR04T

APEM Inc.In Stock: 1053DSR04T Datasheet

Current PartRFQ

206-4LPST

CTS ElectrocomponentsIn Stock: 877206-4LPST Datasheet

SimilarRFQ

208-4LPST

CTS ElectrocomponentsIn Stock: 965208-4LPST Datasheet

SimilarRFQ

78RB04ST

Grayhill Inc.In Stock: 631378RB04ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSR04T is determined by the following core parameters: circuit configuration (SPST), number of positions (4), current rating (50mA minimum), voltage rating (24VDC minimum), actuator type (slide standard), mounting type (through hole), and pitch (0.100" / 2.54mm). Parts meeting these criteria are functionally compatible with the DSR04T in equivalent applications.

The substitute parts identified are:

• 206-4LPST (CTS Electrocomponents): Meets all core substitution parameters with identical electrical ratings and mechanical interface.
• 208-4LPST (CTS Electrocomponents): Meets all core substitution parameters with identical electrical ratings and mechanical interface.
• 78RB04ST (Grayhill Inc.): Exceeds core substitution parameters with higher current rating (150mA) and voltage rating (30VDC), providing enhanced capability margin.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The 206-4LPST and 208-4LPST from CTS Electrocomponents are direct functional equivalents with active product status, providing the most straightforward replacement path for the obsolete DSR04T. The 206-4LPST offers extended electrical life (10,000 cycles) compared to the DSR04T specification (2,000 cycles).

The 78RB04ST from Grayhill Inc. provides higher current and voltage ratings (150mA at 30VDC), making it suitable for applications requiring enhanced electrical capability margins. All substitute parts maintain identical mechanical interface specifications (pitch, mounting type, termination style) and are packaged in tube format for standard procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can the 206-4LPST directly replace the DSR04T without circuit modification?

A: Yes. The 206-4LPST meets all core electrical and mechanical parameters of the DSR04T, including SPST configuration, 4-position count, 50mA current rating, 24VDC voltage rating, and 0.100" pitch through-hole mounting. No circuit modification is required.

Q: What is the primary difference between the 206-4LPST and 208-4LPST?

A: Both parts are functionally equivalent for DSR04T replacement. The primary difference is contact finish: 206-4LPST uses gold finish, while 208-4LPST uses tin finish. The 206-4LPST also provides extended electrical life (10,000 cycles versus 2,000 cycles).

Q: When should the 78RB04ST be selected instead of the CTS alternatives?

A: The 78RB04ST is appropriate when the application requires higher current capacity (150mA) or higher voltage rating (30VDC) than the DSR04T specification. It provides enhanced electrical capability margins for demanding applications.

Q: Are all substitute parts available in the same packaging format?

A: The 206-4LPST, 208-4LPST, and 78RB04ST are all supplied in tube packaging, consistent with standard DIP switch procurement practices.

Q: Do the substitute parts maintain the same operating temperature range as the DSR04T?

A: The substitute parts offer extended operating temperature ranges (-55°C to 85°C for CTS parts, -40°C to 85°C for Grayhill) compared to the DSR04T (-20°C to 70°C), providing broader environmental compatibility.