DA12T Equivalent & Substitute Parts Reference

Part Overview

The DA12T is a 12-position DIP slide switch manufactured by APEM Inc., designed for through-hole, right-angle mounting applications. This SPST switch operates at 24VDC with a 50mA current rating and features gold-plated phosphor bronze contacts. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

DA12T

APEM Inc.In Stock: 741DA12T Datasheet

Current PartRFQ

NDA-12T-V

APEM Inc.In Stock: 695NDA-12T-V Datasheet

SimilarRFQ

KAS2112E

E-SwitchIn Stock: 735KAS2112E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DA12T is determined by strict alignment with the following core parameters:

• Circuit Configuration: Must be SPST
• Number of Positions: Must be 12
• Voltage Rating: Must be 24VDC
• Mounting Type: Must be through-hole, right-angle
• Pitch: Must be 0.100" (2.54mm)
• Height Above Board: Must be 0.390" (9.90mm)
• Actuator Type: Must be slide (standard) with raised level
• Contact Finish: Must be gold-plated
• Termination Style: Must be PC pin

Current rating variations are permissible when the substitute part's rating meets or exceeds the application requirement. Operating temperature range may extend beyond the original specification without restriction. Mechanical and electrical life specifications are not substitution-limiting factors when the substitute meets the electrical and mechanical interface requirements.

Parameter Comparison

Engineering Selection Recommendations

Both NDA-12T-V and KAS2112E meet the core mechanical and electrical interface requirements for DA12T substitution. Selection between these alternatives should be based on the following criteria:

NDA-12T-V (APEM Inc.): This substitute maintains manufacturer continuity with the original DA12T, both sourced from APEM Inc. The NDA-12T-V is classified as active product status, ensuring long-term availability and supply chain stability. Current rating is reduced to 25mA; this substitute is suitable only for applications where the circuit current does not exceed 25mA. Operating temperature range remains -20°C to 70°C, matching the original specification.

KAS2112E (E-Switch): This substitute provides extended operating temperature range (-40°C to 85°C), offering broader environmental tolerance than the original DA12T. The KAS2112E is also active product status with established supply availability. Current rating is 25mA, with the same application limitation as NDA-12T-V. This option is preferred for applications requiring operation outside the -20°C to 70°C range or where extended temperature margin is required.

Both substitutes are ROHS3 compliant and maintain identical mechanical interfaces, pitch, and mounting configuration. Selection should prioritize application current requirements and operating temperature envelope.

Frequently Asked Questions (FAQ)

Q: Can NDA-12T-V or KAS2112E be used as direct replacements for DA12T in all applications?

A: Direct substitution is valid only when circuit current does not exceed 25mA. The DA12T is rated for 50mA; both substitutes are rated for 25mA. If the application requires current handling above 25mA, neither substitute is appropriate.

Q: What is the significance of the obsolete status for DA12T?

A: Obsolete status indicates the DA12T is no longer manufactured or supported by APEM Inc. Both substitute parts are classified as active, ensuring continued availability and manufacturing support for new designs or component replenishment.

Q: Are there mechanical compatibility concerns when switching from DA12T to either substitute?

A: No. Both substitutes maintain identical pitch (0.100"), height above board (0.390"), mounting type (through-hole, right-angle), and termination style (PC pin). PCB layout and mechanical assembly require no modification.

Q: How do operating temperature ranges affect substitution decisions?

A: The DA12T operates from -20°C to 70°C. NDA-12T-V maintains this range. KAS2112E extends to -40°C to 85°C. If the application operates within -20°C to 70°C, both are suitable. If operation extends beyond this range, KAS2112E is required.

Q: What compliance certifications apply to these substitutes?

A: All three parts (DA12T, NDA-12T-V, and KAS2112E) are ROHS3 compliant and REACH unaffected. No compliance barriers exist for substitution.

Q: Does washability differ between substitutes?

A: DA12T and NDA-12T-V are washable. KAS2112E is not washable. If the PCB assembly process includes aqueous cleaning, NDA-12T-V is the preferred substitute.