JS0204AP4-S Equivalent & Substitute Parts

Part Overview

The JS0204AP4-S is a 4-position DIP switch manufactured by NKK Switches, designed for surface mount applications requiring SPST (Single Pole Single Throw) switching at 25mA and 24VDC. This component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and environmental operating parameters to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Value
Circuit Configuration	SPST
Number of Positions	4
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Surface Mount
Termination Style	Gull Wing
Pitch	0.100" (2.54mm)
Contact Finish	Gold
Mechanical Life	2,000 Cycles
Electrical Life	2,000 Cycles
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the JS0204AP4-S are qualified based on the following critical parameters that must match or remain compatible:

Circuit configuration: SPST
Number of positions: 4
Current rating: 25mA (0.025A)
Voltage rating: 24VDC
Actuator type: Slide (Standard)
Mounting type: Surface Mount
Termination style: Gull Wing
Pitch: 0.100" (2.54mm)
Contact finish: Gold
Mechanical and electrical life: 2,000 Cycles minimum
Compliance: ROHS3 Compliant, REACH Unaffected

All identified substitute parts meet these core electrical and mechanical requirements. Variations in body material, contact material composition, height above board, and operating temperature range do not affect functional substitution when these primary parameters align.

Parameter Comparison

Parameter	JS0204AP4-S (NKK)	DM04 (APEM)	KAE04LGGT (E-Switch)	KAE04LGGR (E-Switch)
Manufacturer	NKK Switches	APEM Inc.	E-Switch	E-Switch
Circuit	SPST	SPST	SPST	SPST
Positions	4	4	4	4
Current Rating	25mA	25mA	25mA	25mA
Voltage Rating	24VDC	24VDC	24VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination Style	Gull Wing	Gull Wing	Gull Wing	Gull Wing
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish	Gold	Gold	Gold	Gold
Height Above Board	0.170" (4.33mm)	0.173" (4.40mm)	0.175" (4.45mm)	0.175" (4.45mm)
Length	0.437" (11.10mm)	0.437" (11.10mm)	0.441" (11.20mm)	0.441" (11.20mm)
Operating Temperature	-20°C ~ 70°C	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C
Mechanical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles	2,000 Cycles
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging	Tube	Tube	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

All three substitute parts—DM04 (APEM Inc.), KAE04LGGT (E-Switch), and KAE04LGGR (E-Switch)—are functionally equivalent to the JS0204AP4-S for direct replacement in 24VDC, 25mA SPST 4-position DIP switch applications. Each part maintains ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial electronics.

The DM04 and KAE04 series parts feature extended operating temperature ranges (-20°C to 85°C) compared to the JS0204AP4-S (-20°C to 70°C), providing broader environmental tolerance. Mechanical and electrical life ratings remain consistent at 2,000 cycles across all parts.

Packaging format differs between options: JS0204AP4-S, DM04, and KAE04LGGT are supplied in Tube packaging, while KAE04LGGR is supplied in Tape & Reel format. Selection between these parts should consider procurement requirements, inventory management practices, and assembly line compatibility.

Frequently Asked Questions (FAQ)

Q: Can DM04, KAE04LGGT, and KAE04LGGR be used interchangeably with JS0204AP4-S?

A: Yes. All parts share identical electrical specifications (SPST, 4 positions, 25mA, 24VDC), mechanical configuration (surface mount, gull wing termination, 0.100" pitch), and lifecycle ratings (2,000 cycles mechanical and electrical life). They are direct functional equivalents.

Q: What are the differences in physical dimensions?

A: Height above board varies slightly: JS0204AP4-S measures 0.170" (4.33mm), DM04 measures 0.173" (4.40mm), and both KAE04 variants measure 0.175" (4.45mm). Length differences are minimal: JS0204AP4-S and DM04 are 0.437" (11.10mm), while KAE04 variants are 0.441" (11.20mm). These variations fall within typical PCB layout tolerances for surface mount components.

Q: How do operating temperature ranges affect substitution?

A: The JS0204AP4-S operates from -20°C to 70°C, while DM04 and both KAE04 variants operate from -20°C to 85°C. If your application requires operation above 70°C, substitute parts provide extended temperature capability. For applications within the -20°C to 70°C range, all parts are equivalent.

Q: What is the difference between KAE04LGGT and KAE04LGGR?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: KAE04LGGT is supplied in Tube format, while KAE04LGGR is supplied in Tape & Reel format. Selection depends on assembly process requirements and procurement preferences.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. JS0204AP4-S, DM04, KAE04LGGT, and KAE04LGGR are all ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronics manufacturing in regulated markets.

Q: What contact materials are used in these parts?

A: JS0204AP4-S uses beryllium copper contacts with gold finish. DM04 uses copper alloy contacts with gold finish. KAE04 variants use copper contacts with gold finish. All maintain gold contact finish for reliable electrical performance and corrosion resistance.

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