APEM Inc. M43R Slide Switch 4P3T Equivalent & Substitute Parts

Part Overview

The APEM Inc. M43R is a slide switch with 4-pole, 3-throw (4P3T) configuration rated for 300mA at 125V AC and 30V DC. This through-hole, right-angle mounted switch features epoxy sealed terminals and is designed for On-On-On switching applications. The M43R is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and new design implementations where this component is specified.

Key Parameters

Parameter	Value
Circuit Configuration	4P3T (4-pole, 3-throw)
Current Rating	300mA (AC/DC)
Voltage Rating - AC	125V
Voltage Rating - DC	30V
Switch Function	On-On-On
Mounting Type	Through Hole, Right Angle
Termination Style	PC Pin
Contact Finish	Silver
Operating Temperature Range	-10°C to 60°C
Switch Travel	2.00mm
Electrical Life	10,000 Cycles
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M43R is determined by strict equivalence in the following critical parameters:

Circuit Configuration: Must be 4P3T to maintain identical switching topology
Current Rating: Minimum 300mA to support specified load requirements
Voltage Rating - AC: Minimum 125V to meet AC voltage specifications
Switch Function: Must be On-On-On to preserve application behavior
Mounting Type: Through hole, right angle configuration required for PCB compatibility
Termination Style: PC pin termination for direct board mounting
Contact Finish: Silver finish for electrical performance consistency

The TE Connectivity ALCOSWITCH Switches 1825203-3 meets all critical substitution criteria. This part maintains identical circuit configuration, current rating, AC voltage rating, switch function, mounting type, termination style, and contact finish. The substitute part is classified as active, providing long-term availability and supply chain continuity.

Parameter Comparison

Parameter	APEM Inc. M43R	TE Connectivity 1825203-3	Compatibility
Circuit Configuration	4P3T	4P3T	Equivalent
Current Rating (Amps)	300mA (AC/DC)	300mA (AC)	Equivalent
Voltage Rating - AC	125V	125V	Equivalent
Switch Function	On-On-On	On-On-On	Equivalent
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Equivalent
Termination Style	PC Pin	PC Pin	Equivalent
Contact Finish	Silver	Silver	Equivalent
Features	Epoxy Sealed Terminals	Epoxy Sealed Terminals	Equivalent
Operating Temperature Range	-10°C to 60°C	-20°C to 85°C	Substitute exceeds specification
Switch Travel	2.00mm	2.00mm	Equivalent
Electrical Life	10,000 Cycles	15,000 Cycles	Substitute exceeds specification
Product Status	Obsolete	Active	Substitute provides ongoing availability
RoHS Status	ROHS3 Compliant	Not applicable	Original part compliant

Engineering Selection Recommendations

The TE Connectivity ALCOSWITCH Switches 1825203-3 is a direct functional substitute for the obsolete APEM Inc. M43R. Both parts maintain identical electrical specifications for circuit configuration, current rating, AC voltage rating, and switch function. The substitute part is classified as active, ensuring availability for replacement applications and new designs.

The substitute part demonstrates enhanced performance characteristics, including extended operating temperature range (-20°C to 85°C versus -10°C to 60°C) and increased electrical life (15,000 cycles versus 10,000 cycles). These improvements provide additional design margin without compromising compatibility.

Both parts carry equivalent compliance certifications (ECCN: EAR99, HTSUS: 8536.50.9050) and maintain identical moisture sensitivity levels (MSL 1 - Unlimited). The substitute part's active status provides superior long-term supply chain reliability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1825203-3 be used as a direct replacement for the APEM Inc. M43R?

A: Yes. Both parts share identical circuit configuration (4P3T), current rating (300mA), AC voltage rating (125V), switch function (On-On-On), mounting type (through hole, right angle), termination style (PC pin), and contact finish (silver). Physical and electrical compatibility is confirmed.

Q: What are the key differences between these parts?

A: The substitute part offers extended operating temperature range (-20°C to 85°C versus -10°C to 60°C) and increased electrical life (15,000 cycles versus 10,000 cycles). The substitute is classified as active, while the original is obsolete. Both parts maintain equivalent epoxy sealed terminal construction and 2.00mm switch travel.

Q: Are there compliance or certification differences?

A: Both parts carry identical ECCN (EAR99) and HTSUS (8536.50.9050) classifications. The original part is ROHS3 compliant. Both maintain MSL 1 (Unlimited) moisture sensitivity levels. Compliance requirements are met by both parts.

Q: What is the actuator length difference?

A: The APEM Inc. M43R has a 10.00mm actuator length, while the TE Connectivity 1825203-3 has a 9.02mm actuator length. This 0.98mm difference must be evaluated for mechanical clearance in the specific application.

Q: Should the extended temperature range of the substitute part affect selection?

A: The substitute part's extended operating temperature range (-20°C to 85°C) exceeds the original specification (-10°C to 60°C). This provides additional design margin and is not a limiting factor for applications within the original temperature range.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message