DSR05T DIP Switch SPST 5 Position Equivalent & Substitute Parts

Part Overview

The DSR05T is a slide-actuated DIP switch manufactured by APEM Inc., configured as a single-pole single-throw (SPST) switch with 5 positions. This component is rated for 50mA at 24VDC and features through-hole mounting with PC pin termination. The DSR05T is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Circuit Configuration	SPST (Single-Pole Single-Throw)
Number of Positions	5
Current Rating	50mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Contact Finish	Gold or Tin
Operating Temperature Range	-20°C to 70°C (DSR05T); -55°C to 85°C (substitutes)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DSR05T is determined by the following critical parameters:

Circuit Configuration: Must be SPST
Number of Positions: Must be 5
Mounting Type: Must be Through Hole
Pitch: Must be 0.100" (2.54mm)
Actuator Type: Must be Slide (Standard)
Termination Style: Must be PC Pin
Compliance: Must be ROHS3 Compliant

The substitute parts listed below meet these core requirements. Variations in current rating, voltage rating, contact material, and contact finish are permissible when the application design margins accommodate the higher electrical specifications of the substitute component.

Parameter Comparison

Parameter	DSR05T (APEM)	206-5LPST (CTS)	208-5LPST (CTS)	78RB05ST (Grayhill)
Manufacturer	APEM Inc.	CTS Electrocomponents	CTS Electrocomponents	Grayhill Inc.
Product Status	Obsolete	Active	Active	Active
Circuit	SPST	SPST	SPST	SPST
Positions	5	5	5	5
Current Rating	50mA	50mA	50mA	150mA
Voltage Rating	24VDC	24VDC	24VDC	30VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish	Gold	Gold	Tin	Gold
Height Above Board	0.222" (5.64mm)	0.299" (7.60mm)	0.299" (7.60mm)	0.265" (6.73mm)
Operating Temperature	-20°C to 70°C	-55°C to 85°C	-55°C to 85°C	-40°C to 85°C
Electrical Life	2,000 Cycles	10,000 Cycles	2,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

206-5LPST (CTS Electrocomponents): This substitute provides direct electrical compatibility with the DSR05T, matching the 50mA/24VDC rating. The part is in active production status with ROHS3 compliance and REACH unaffected certification. The 206-5LPST offers extended electrical life (10,000 cycles) compared to the original part. Height above board is 0.299" versus 0.222" for the DSR05T; verify PCB clearance in your application.

208-5LPST (CTS Electrocomponents): This substitute matches the DSR05T electrical specifications (50mA/24VDC) and is in active production. It features tin contact finish instead of gold. ROHS3 compliant and REACH unaffected. Physical dimensions are identical to the 206-5LPST. Select this option if tin contact finish is acceptable for your application.

78RB05ST (Grayhill Inc.): This substitute exceeds the DSR05T electrical specifications with 150mA/30VDC rating and is suitable for applications requiring higher current or voltage margins. The part is in active production with ROHS3 compliance and REACH unaffected certification. Height above board is 0.265", intermediate between the DSR05T and CTS options. Electrical life matches the original part at 2,000 cycles.

All three substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Frequently Asked Questions (FAQ)

Q: Can the 206-5LPST or 208-5LPST be used as direct replacements for the DSR05T?

A: Yes, both CTS parts are direct electrical substitutes. They maintain the same SPST circuit configuration, 5-position count, 50mA/24VDC rating, and 0.100" pitch. Verify that the increased height above board (0.299" versus 0.222") does not conflict with your PCB layout or enclosure constraints.

Q: What is the difference between the 206-5LPST and 208-5LPST?

A: The primary difference is contact finish: 206-5LPST uses gold finish, while 208-5LPST uses tin finish. Both parts are electrically identical at 50mA/24VDC. The 206-5LPST offers superior electrical life (10,000 cycles versus 2,000 cycles). Select based on your contact material requirements and expected cycle count.

Q: When should I use the 78RB05ST instead of the CTS options?

A: The 78RB05ST is appropriate when your application requires higher electrical margins. It is rated for 150mA/30VDC, providing 3x current capacity and 25% higher voltage rating than the DSR05T. Use this part if your circuit design operates near the DSR05T limits or if you require enhanced reliability through over-specification.

Q: Are all substitute parts through-hole mounted with 0.100" pitch?

A: Yes. All substitute parts maintain through-hole mounting with 0.100" (2.54mm) pitch, ensuring compatibility with standard DIP switch footprints. Height above board varies: DSR05T is 0.222", CTS parts are 0.299", and Grayhill is 0.265". Confirm clearance in your specific application.

Q: Do the substitute parts meet current compliance standards?

A: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and use in regulated industries.

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