DP12 DIP Switch Equivalent & Substitute Parts

Part Overview

The DP12 is a 12-position piano DIP switch manufactured by APEM Inc., rated for 50mA at 24VDC with through-hole, right-angle mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The DP12 features phosphor bronze contacts with gold finish, PC pin termination, and is housed in glass-filled PBT material suitable for industrial applications requiring sealed terminal construction.

Key Parameters

Parameter	DP12 Specification
Circuit Configuration	SPST (Single Pole Single Throw)
Number of Positions	12
Current Rating	50mA
Voltage Rating	24VDC
Actuator Type	Piano
Mounting Type	Through Hole, Right Angle
Pitch	0.100" (2.54mm)
Height Above Board	0.402" (10.20mm)
Contact Material	Phosphor Bronze
Contact Finish	Gold
Termination Style	PC Pin
Operating Temperature Range	-20°C to 70°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DP12 is determined by the following critical parameters:

Circuit Configuration: Must be SPST
Number of Positions: Must be 12
Mounting Type: Must be through-hole, right-angle
Pitch: Must be 0.100" (2.54mm)
Height Above Board: Must be 0.402" (10.20mm)
Termination Style: Must be PC Pin
Voltage Rating: Must support 24VDC operation
RoHS Compliance: Must meet ROHS3 standard

The identified substitutes meet these core mechanical and electrical compatibility criteria. Variations in current rating, actuator level, contact material, and operating temperature range are permissible within the constraints of the application circuit design.

Parameter Comparison

Parameter	DP12	NDP-12-V	KAP1112E
Manufacturer	APEM Inc.	APEM Inc.	E-Switch
Product Status	Obsolete	Active	Active
Circuit Configuration	SPST	SPST	SPST
Number of Positions	12	12	12
Current Rating	50mA	25mA	25mA
Voltage Rating	24VDC	24VDC	24VDC
Actuator Type	Piano	Piano	Piano
Actuator Level	Flush, Recessed	Flush, Recessed	Raised
Height Above Board	0.402" (10.20mm)	0.402" (10.20mm)	0.402" (10.20mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination Style	PC Pin	PC Pin	PC Pin
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish	Gold	Gold	Gold
Operating Temperature Range	-20°C to 70°C	-20°C to 70°C	-40°C to 85°C
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1	MSL 1	MSL 1

Engineering Selection Recommendations

Both NDP-12-V and KAP1112E are active production alternatives to the obsolete DP12. Selection between these substitutes depends on application-specific current requirements:

NDP-12-V (APEM Inc.): Maintains APEM Inc. manufacturer continuity with identical mechanical footprint and operating temperature range. Current rating of 25mA is suitable for applications where the DP12's 50mA capacity exceeds circuit requirements. ROHS3 compliant with EAR99 export classification.

KAP1112E (E-Switch): Provides extended operating temperature range (-40°C to 85°C) compared to the DP12 (-20°C to 70°C), supporting applications requiring broader thermal performance. Current rating of 25mA matches NDP-12-V. Raised actuator level differs from DP12's flush configuration. ROHS3 compliant with EAR99 export classification. Supplied in tube packaging.

Both substitutes maintain identical pitch, height above board, termination style, and electrical life specifications. Current rating reduction from 50mA to 25mA in both alternatives requires circuit validation to confirm application compatibility.

Frequently Asked Questions (FAQ)

Q: Can NDP-12-V or KAP1112E directly replace DP12 in existing designs?

A: Mechanical compatibility is confirmed through matching pitch (0.100"), height above board (0.402"), mounting type (through-hole right-angle), and termination style (PC pin). Electrical compatibility requires verification that the application circuit operates within the 25mA current rating of both substitutes, compared to the DP12's 50mA rating.

Q: What is the difference between flush and raised actuator levels?

A: The DP12 and NDP-12-V feature flush, recessed actuators, while the KAP1112E has a raised actuator. This affects the physical profile above the PCB and may impact panel cutout design or mechanical clearance in confined spaces.

Q: Are there packaging differences between substitutes?

A: NDP-12-V packaging is not specified in available data. KAP1112E is supplied in tube packaging. Confirm packaging requirements for your procurement and assembly processes.

Q: Do both substitutes meet the same compliance standards as DP12?

A: Yes. Both NDP-12-V and KAP1112E are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity rating, matching the DP12's compliance profile.

Q: What is the impact of the reduced current rating on circuit design?

A: The DP12 is rated for 50mA while both substitutes are rated for 25mA. Applications must operate within the 25mA limit. If the original design requires higher current switching capacity, these substitutes are not suitable without circuit modification.

Q: Which substitute offers the widest operating temperature range?

A: KAP1112E supports -40°C to 85°C, compared to DP12 and NDP-12-V at -20°C to 70°C. KAP1112E is the appropriate choice for applications requiring extended low-temperature or high-temperature operation.

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