TE Connectivity ALCOSWITCH 4-1437564-1 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 4-1437564-1 is a Toggle Switch SPDT (Single Pole Double Throw) rated for 0.4VA at 20V with through-hole mounting. This component operates in On-Off-On configuration and features a sealed design with a 4.29mm standard round actuator. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	4-1437564-1
Manufacturer	TE Connectivity ALCOSWITCH Switches
Series	TST
Circuit Configuration	SPDT
Switch Function	On-Off-On
Current Rating	0.4VA (AC/DC)
Voltage Rating - AC	20 V
Voltage Rating - DC	20 V
Mounting Type	Through Hole
Termination Style	PC Pin
Actuator Type	Standard Round
Actuator Length	4.29mm
Operating Temperature Range	-30°C ~ 85°C
Electrical Life	60,000 Cycles
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 4-1437564-1 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Mandatory Match):

Circuit Configuration: SPDT
Switch Function: On-Off-On
Current Rating: 0.4VA (AC/DC)
Voltage Rating - AC: 20 V
Voltage Rating - DC: 20 V
Mounting Type: Through Hole
Termination Style: PC Pin
Actuator Type: Standard Round
Operating Temperature Range: -30°C ~ 85°C

Secondary Compatibility Parameters (Allowable Variation):

Actuator Length: Variations acceptable within mechanical envelope constraints
Electrical Life: Variations acceptable if equal to or exceeding original specification
Ingress Protection: Enhanced ratings acceptable
Features: Enhanced sealing acceptable
Actuator Material: Variations acceptable if functionally equivalent
RoHS/REACH Compliance: Enhanced compliance acceptable

Substitute parts are grouped into two categories based on electrical specifications:

Category A - Direct Electrical Equivalents (0.4VA @ 20V):

200AWMSP3T2A1M2RE (E-Switch)
34DWMSP32B4M2RT (Grayhill Inc.)
ET03MD1CBE (C&K)
TL39P000000 (APEM Inc.)
TL39P005000 (APEM Inc.)

Category B - Higher Rated Alternatives (3A @ 120V/28V DC):

200AWMSP3T2A1M2QE (E-Switch)
34DWMSP32B4M2QT (Grayhill Inc.)

Category B parts exceed the electrical requirements of the original component and are suitable for applications requiring enhanced current and voltage capacity while maintaining SPDT On-Off-On functionality.

Parameter Comparison

Parameter	4-1437564-1 (TE Connectivity)	200AWMSP3T2A1M2RE (E-Switch)	200AWMSP3T2A1M2QE (E-Switch)	34DWMSP32B4M2RT (Grayhill)	34DWMSP32B4M2QT (Grayhill)	ET03MD1CBE (C&K)	TL39P000000 (APEM)	TL39P005000 (APEM)
Circuit Configuration	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Switch Function	On-Off-On	On-Off-On	On-Off-On	On-Off-On	On-Off-On	On-Off-On	On-Off-On	On-Off-On
Current Rating (AC/DC)	0.4VA	0.4VA	3A	0.4VA	3A	0.4VA	0.4VA	0.4VA
Voltage Rating - AC	20 V	20 V	120 V	20 V	125 V	20 V	20 V	20 V
Voltage Rating - DC	20 V	20 V	28 V	20 V	28 V	20 V	20 V	20 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin
Actuator Type	Standard Round	Standard Round	Standard Round	Standard Round	Standard Round	Standard Round	Standard Round	Standard Round
Actuator Length	4.29mm	6.10mm	6.10mm	6.10mm	6.10mm	6.10mm	5.30mm	5.30mm
Operating Temperature Range	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C
Electrical Life	60,000 Cycles	50,000 Cycles	50,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ingress Protection	Not specified	IP67	IP67	IP67	IP67	IP57	Not specified	Not specified

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Specifications):

Select from Category A direct equivalents when the application requires exact electrical matching at 0.4VA and 20V ratings:

TL39P000000 or TL39P005000 (APEM Inc.): Both parts are ROHS3 compliant and active products. These represent the closest functional equivalents with actuator length of 5.30mm, which is intermediate between the original 4.29mm and the 6.10mm alternatives. REACH status is unaffected, providing regulatory clarity for new designs.
200AWMSP3T2A1M2RE (E-Switch): Active product with ROHS3 compliance and REACH unaffected status. Features enhanced IP67 ingress protection and epoxy sealed terminals. Actuator length of 6.10mm requires mechanical envelope verification.
34DWMSP32B4M2RT (Grayhill Inc.): Active product with RoHS compliance and REACH unaffected status. Provides IP67 ingress protection. Electrical life of 30,000 cycles is lower than the original specification; verify application cycle requirements.
ET03MD1CBE (C&K): Active product with ROHS3 compliance and REACH affected status. Offers IP57 ingress protection. Electrical life of 30,000 cycles requires cycle requirement verification.

For Enhanced Capability Applications:

Select from Category B higher-rated alternatives when the application can accommodate increased current and voltage capacity:

200AWMSP3T2A1M2QE (E-Switch): Rated for 3A at 120V AC and 28V DC. ROHS3 compliant with REACH unaffected status. Suitable for applications requiring higher power handling while maintaining SPDT On-Off-On functionality.
34DWMSP32B4M2QT (Grayhill Inc.): Rated for 3A at 125V AC and 28V DC. RoHS compliant with REACH unaffected status. Provides enhanced electrical capacity for demanding applications.

Regulatory Compliance Considerations:

All substitute parts listed are active products with current RoHS compliance status. The original TE Connectivity 4-1437564-1 is RoHS non-compliant; migration to any substitute part improves regulatory compliance for new production. REACH status varies by manufacturer; verify REACH compliance requirements for specific end-use applications and geographic markets.

Frequently Asked Questions (FAQ)

Q: Can the TL39P000000 or TL39P005000 directly replace the TE Connectivity 4-1437564-1?

A: Yes. Both APEM parts maintain identical electrical specifications (0.4VA, 20V AC/DC, SPDT On-Off-On) and through-hole PC pin termination. The actuator length differs (5.30mm versus 4.29mm), requiring verification that the mechanical envelope accommodates the longer actuator. Both parts are active products with ROHS3 compliance.

Q: What is the significance of the 6.10mm actuator length on E-Switch and Grayhill parts?

A: The actuator length affects the physical profile of the switch when mounted on a PCB. The original part has a 4.29mm actuator, while substitute parts with 6.10mm actuators extend further from the panel. Panel cutout dimensions and surrounding component placement must be verified to ensure mechanical compatibility. The APEM parts at 5.30mm provide an intermediate option.

Q: Why do some substitute parts have lower electrical life ratings?

A: The original TE Connectivity part specifies 60,000 electrical cycles, while most substitutes specify 30,000 or 50,000 cycles. Applications requiring high cycle counts should verify that the substitute part's electrical life meets the intended duty cycle. For low-cycle applications, the reduced electrical life specification does not impact functionality.

Q: Are the higher-rated parts (3A @ 120V) suitable for 0.4VA @ 20V applications?

A: Yes. The 200AWMSP3T2A1M2QE and 34DWMSP32B4M2QT are rated for higher current and voltage than required by the original application. These parts operate safely at reduced electrical stress in 0.4VA @ 20V circuits. Selection of higher-rated parts is appropriate when component availability or supply chain considerations favor their use.

Q: What is the difference between IP67 and IP57 ingress protection ratings?

A: IP67 (Dust Tight, Waterproof) provides complete protection against dust ingress and temporary immersion in water. IP57 (Dust Protected, Waterproof) allows limited dust ingress but maintains waterproof functionality. The original part does not specify ingress protection. For applications requiring sealed operation, IP67-rated substitutes (E-Switch and Grayhill parts) provide enhanced environmental protection compared to IP57 (C&K) or unspecified (APEM) alternatives.

Q: How does RoHS compliance affect part selection?

A: The original TE Connectivity part is RoHS non-compliant. All listed substitute parts are RoHS compliant (either RoHS or ROHS3 standard). For new product designs and production after RoHS compliance deadlines, selection of compliant substitute parts is mandatory. Existing inventory of the original part may be used for legacy product support only.

Q: What does REACH affected versus REACH unaffected status mean?

A: REACH affected status indicates the part contains substances of very high concern (SVHC) that require declaration and potential authorization. REACH unaffected status indicates no SVHC content or that SVHC content is below regulatory thresholds. For applications subject to REACH regulations, parts with REACH unaffected status (E-Switch, Grayhill, APEM) are preferred over REACH affected parts (C&K ET03MD1CBE).

Q: Can I use the 200AWMSP3T2A1M2QE in place of the 200AWMSP3T2A1M2RE?

A: Both are E-Switch 200A series SPDT On-Off-On toggle switches with identical mechanical specifications and through-hole mounting. The primary difference is electrical rating: the QE variant is rated for 3A @ 120V AC and 28V DC, while the RE variant is rated for 0.4VA @ 20V. The QE part is suitable for higher-power applications but is not necessary for circuits designed for 0.4VA @ 20V operation. Selection depends on application electrical requirements.

Q: Are all substitute parts available in the same packaging as the original?

A: Packaging varies by manufacturer and supplier. The original TE Connectivity part packaging is not specified in the data. E-Switch parts are supplied in bulk packaging, Grayhill parts in unspecified packaging, C&K in tray packaging, and APEM in bulk packaging. Verify packaging requirements with component suppliers for production planning and inventory management.

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