DA04T DIP Switch SPST 4-Position Equivalent & Substitute Parts

Part Overview

The DA04T is a slide-actuated DIP switch manufactured by APEM Inc., configured as a single-pole single-throw (SPST) switch with 4 positions. This component is rated for 50mA at 24VDC and features through-hole, right-angle mounting with gold-plated phosphor bronze contacts. The DA04T is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

DA04T

APEM Inc.In Stock: 769DA04T Datasheet

Current PartRFQ

NDA-04T-V

APEM Inc.In Stock: 1026NDA-04T-V Datasheet

SimilarRFQ

78B04SRAT

Grayhill Inc.In Stock: 99478B04SRAT Datasheet

SimilarRFQ

KAS2104E

E-SwitchIn Stock: 6089KAS2104E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DA04T is determined by the following critical parameters: circuit configuration (SPST), number of positions (4), actuator type (slide standard), mounting type (through hole, right angle), pitch (0.100"), and contact finish (gold). Substitute parts must maintain compatibility with these core mechanical and electrical interfaces.

Current and voltage ratings establish operational boundaries. A substitute part must support the application's electrical requirements without exceeding the original specifications unless the design permits higher ratings. Voltage rating must be equal to or greater than 24VDC; current rating must be equal to or greater than 50mA.

The following substitute parts meet these criteria:

NDA-04T-V (APEM Inc.): Maintains identical circuit, position count, actuator type, mounting, and pitch. Current rating of 25mA is lower than the original 50mA specification and is suitable only for applications requiring 25mA or less.

78B04SRAT (Grayhill Inc.): Maintains identical circuit, position count, actuator type, mounting, and pitch. Current rating of 150mA and voltage rating of 30VDC exceed original specifications, providing operational margin. Operating temperature range extends to -40°C to 85°C.

KAS2104E (E-Switch): Maintains identical circuit, position count, actuator type, mounting, and pitch. Current rating of 25mA is lower than the original 50mA specification and is suitable only for applications requiring 25mA or less. Operating temperature range extends to -40°C to 85°C.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are ROHS3 compliant and carry REACH unaffected status, matching the regulatory compliance profile of the DA04T.

For direct replacement with identical electrical specifications: No substitute part maintains the exact 50mA current rating of the DA04T. Selection must be based on application requirements.

For applications rated at 25mA or lower: NDA-04T-V or KAS2104E are suitable. NDA-04T-V is manufactured by APEM Inc., the original manufacturer, and maintains the same operating temperature range as the DA04T. KAS2104E extends the operating temperature range to -40°C to 85°C and is available in higher inventory quantity.

For applications requiring current margin above 50mA: 78B04SRAT provides 150mA current capacity and 30VDC voltage rating, exceeding original specifications. This part also offers extended operating temperature range (-40°C to 85°C) and higher electrical life (10,000 cycles versus 2,000 cycles).

All substitute parts maintain mechanical compatibility through identical actuator type, mounting configuration, and pitch specifications.

Frequently Asked Questions (FAQ)

Q: Can NDA-04T-V or KAS2104E be used as direct replacements for DA04T in a 50mA application?

A: No. Both parts are rated for 25mA maximum, which is below the 50mA requirement of the original DA04T. These substitutes are suitable only for applications designed for 25mA or lower current draw.

Q: Is 78B04SRAT a suitable replacement for DA04T?

A: Yes, for applications requiring 50mA or less at 24VDC. The 78B04SRAT is rated for 150mA at 30VDC, providing operational margin above the original specifications. Mechanical compatibility is maintained through identical mounting type, pitch, and actuator configuration.

Q: What are the key differences between the substitute parts?

A: NDA-04T-V and KAS2104E both operate at 25mA maximum, limiting their use to lower-current applications. 78B04SRAT provides higher current capacity (150mA) and voltage rating (30VDC). KAS2104E and 78B04SRAT both extend the operating temperature range to -40°C to 85°C compared to the DA04T's -20°C to 70°C range. 78B04SRAT also provides extended electrical life of 10,000 cycles.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the DA04T.

Q: What is the pitch specification and why is it important?

A: All parts, including the DA04T and substitutes, use 0.100" (2.54mm) pitch. This specification defines the spacing between pin centers and is critical for PCB footprint compatibility. Identical pitch ensures mechanical fit without board redesign.

Q: Can I use a substitute part with a lower current rating if my application only draws 25mA?

A: Yes. If your application requires 25mA or less, NDA-04T-V or KAS2104E are suitable. Ensure the voltage rating (24VDC) matches your application requirements.