DSR08T DIP Switch Equivalent & Substitute Parts

Part Overview

The DSR08T is an 8-position DIP switch manufactured by APEM Inc., designed for through-hole mounting applications requiring low-current switching at 24VDC. This component features a slide actuator with gold-plated phosphor bronze contacts and is rated for 50mA at 24VDC with a mechanical life of 5,000 cycles. The DSR08T is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

DSR08T

APEM Inc.In Stock: 692DSR08T Datasheet

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78RB08ST

Grayhill Inc.In Stock: 129478RB08ST Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSR08T is determined by the following critical parameters:

• Circuit Configuration: Must be SPST to maintain identical switching logic
• Number of Positions: Must be 8 to ensure pin-for-pin compatibility
• Mounting Type: Must be through-hole with 0.100" (2.54mm) pitch for PCB footprint compatibility
• Actuator Type: Must be slide actuator (standard) for mechanical interface compatibility
• Electrical Ratings: Substitute must meet or exceed the 50mA at 24VDC requirement
• Contact Material & Finish: Gold-plated contacts required for reliability in low-current applications
• Regulatory Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The 78RB08ST from Grayhill Inc. satisfies all substitution criteria with enhanced electrical ratings (150mA at 30VDC), ensuring full backward compatibility while providing improved performance margins.

Parameter Comparison

Engineering Selection Recommendations

The 78RB08ST is a direct functional substitute for the obsolete DSR08T. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The 78RB08ST provides superior electrical performance with 150mA current capacity and 30VDC voltage rating, exceeding the DSR08T specifications by 3x and 1.25x respectively. The extended operating temperature range (-40°C to 85°C versus -20°C to 70°C) accommodates broader environmental applications. Physical dimensions differ slightly; the 78RB08ST is 0.043" taller and 0.021" longer, requiring verification of available PCB clearance in space-constrained layouts. Both components feature identical pitch (0.100"), actuator type, and termination style, ensuring pin-for-pin compatibility on standard DIP switch footprints.

Frequently Asked Questions (FAQ)

Q: Is the 78RB08ST a direct pin-for-pin replacement for the DSR08T?

A: Yes. Both components feature 8-position SPST configuration with 0.100" (2.54mm) pitch, slide actuator, through-hole mounting, and PC pin termination. Physical dimensions vary slightly; verify PCB clearance for the 78RB08ST's increased height (0.265" versus 0.222").

Q: Can the 78RB08ST handle the same electrical load as the DSR08T?

A: The 78RB08ST exceeds DSR08T specifications. It is rated for 150mA at 30VDC compared to the DSR08T's 50mA at 24VDC. Applications designed for DSR08T operation will function within the 78RB08ST's electrical envelope.

Q: Are there compliance differences between these components?

A: No. Both the DSR08T and 78RB08ST maintain ROHS3 compliance and REACH unaffected status. Regulatory requirements are equivalent.

Q: What is the mechanical life difference, and does it affect substitution?

A: The DSR08T specifies 5,000 mechanical cycles while the 78RB08ST specifies 2,000 cycles. For applications requiring high cycle counts, verify that 2,000 cycles meets operational requirements before substitution.

Q: Does packaging differ between these parts?

A: The DSR08T is supplied in standard packaging (not specified), while the 78RB08ST is supplied in tube packaging. Verify packaging requirements for your procurement and assembly processes.

Q: What is the temperature operating range difference?

A: The DSR08T operates from -20°C to 70°C, while the 78RB08ST operates from -40°C to 85°C. The 78RB08ST supports extended temperature applications without derating.