M2029SD3W01 Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The M2029SD3W01 is a DPDT (Double Pole Double Throw) toggle switch manufactured by NKK Switches, rated for 6A at 125V AC and 3A at 30V DC. This panel-mount switch features a standard round actuator with solder lug termination and IP67 ingress protection. The product is classified as obsolete, making equivalent substitute parts necessary for ongoing applications and new designs requiring similar electrical and mechanical characteristics.

Key Parameters

Parameter	M2029SD3W01
Manufacturer	NKK Switches
Circuit Configuration	DPDT
Switch Function	On-Off-Mom
Current Rating (AC)	6A
Current Rating (DC)	3A
Voltage Rating (AC)	125V
Voltage Rating (DC)	30V
Mounting Type	Panel Mount
Actuator Type	Standard Round
Actuator Length	10.50mm
Panel Cutout Diameter	6.50mm
Bushing Thread	1/4-40
Termination Style	Solder Lug
Ingress Protection	IP67
Operating Temperature Range	-30°C to 85°C
Electrical Life	25,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Primary Compatibility Criteria:

Circuit configuration: DPDT required
Switch function: On-Off-Mom required
Mounting type: Panel Mount required
Termination style: Solder Lug required
Bushing thread: 1/4-40 required

Electrical Compatibility Criteria:

AC voltage rating must meet or exceed 125V
AC current rating must meet or exceed 6A
DC voltage rating must meet or exceed 30V
DC current rating must meet or exceed 3A

Mechanical Compatibility Criteria:

Panel cutout diameter tolerance: 6.35mm to 6.50mm acceptable
Actuator length variance acceptable within panel design constraints
Actuator type: Standard Round or compatible anti-rotation designs

Substitute parts are grouped into two categories based on electrical performance alignment with the M2029SD3W01 specifications.

Parameter Comparison

Part Number	Manufacturer	Circuit	Current (AC)	Current (DC)	Voltage (AC)	Voltage (DC)	Actuator Type	Actuator Length (mm)	Panel Cutout (mm)	Electrical Life	Product Status
M2029SD3W01	NKK Switches	DPDT	6A	3A	125V	30V	Standard Round	10.50	6.50	25,000	Obsolete
5648AB	APEM Inc.	DPDT	6A	4A	125V	30V	Standard Round	10.50	6.50	50,000	Active
A231S1HZQ	Electroswitch	DPDT	6A	6A	125V	28V	Standard Round	10.41	Not Specified	60,000	Active
100DP5T1B1M1QEH	E-Switch	DPDT	5A	5A	120V	28V	Standard Round	10.41	6.35	40,000	Active
100DP5T6B11M1QEH	E-Switch	DPDT	5A	5A	120V	28V	Flat Anti-Rotation	12.30	6.35	40,000	Active
34ADP51B1M1QT	Grayhill Inc.	DPDT	5A	5A	125V	28V	Standard Round	10.41	6.35	40,000	Active
34ADP53B1M1QT	Grayhill Inc.	DPDT	5A	5A	125V	28V	Standard Round	13.97	6.35	40,000	Active
7207P3YZQE	C&K	DPDT	5A	5A	120V	28V	Flat Anti-Rotation	11.43	6.35	40,000	Active
7207SYZQE	C&K	DPDT	5A	5A	120V	28V	Standard Round	10.67	6.35	40,000	Active
U27SYZQE	C&K	DPDT	5A	5A	120V	28V	Standard Round	10.67	6.35	40,000	Active

Engineering Selection Recommendations

Direct Electrical Equivalent (Full Specification Match):

The 5648AB (APEM Inc.) provides the closest electrical and mechanical alignment to the M2029SD3W01. It maintains identical AC current (6A) and voltage (125V) ratings, superior DC current capability (4A vs. 3A), matching DC voltage (30V), and identical panel cutout diameter (6.50mm). The 5648AB is active in production with ROHS3 compliance and offers extended electrical life (50,000 cycles vs. 25,000 cycles). This part is the primary recommendation for direct replacement in existing designs.

Secondary Electrical Equivalent (Reduced Current Specification):

The A231S1HZQ (Electroswitch) meets AC specifications (6A at 125V) with enhanced DC current capability (6A vs. 3A) and maintains the 1/4-40 bushing thread. DC voltage is rated at 28V, which is within acceptable tolerance of the 30V requirement. This part is active with extended electrical life (60,000 cycles) and RoHS compliance. Panel cutout dimensions are not specified, requiring verification before selection.

Reduced Rating Alternatives (5A AC Current):

Parts 100DP5T1B1M1QEH, 34ADP51B1M1QT, 7207SYZQE, and U27SYZQE are suitable for applications where 5A AC current is acceptable. These parts maintain DPDT configuration, solder lug termination, and 1/4-40 bushing thread. All are active products with ROHS3 or RoHS compliance. The 34ADP51B1M1QT and 7207SYZQE offer the closest mechanical fit with standard round actuators and 10.41mm to 10.67mm lengths.

Actuator Length Considerations:

Applications with space constraints may require 34ADP53B1M1QT (13.97mm actuator) or 100DP5T6B11M1QEH (12.30mm actuator with flat anti-rotation design). These parts accommodate panel designs with deeper mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a 5A rated switch to replace the 6A M2029SD3W01?

A: Substitution with 5A rated switches is acceptable only if the application circuit operates at or below 5A AC. The M2029SD3W01 is rated for 6A; using a lower-rated switch in a 6A circuit exceeds the substitute part's electrical limits and creates a safety hazard. Verify actual circuit current draw before selecting a 5A alternative.

Q: What is the difference between the 7207SYZQE and 7207P3YZQE?

A: Both are C&K DPDT switches with identical electrical ratings (5A at 120V AC/DC). The primary difference is actuator type: 7207SYZQE features a standard round actuator (10.67mm length), while 7207P3YZQE features a flat anti-rotation actuator (11.43mm length). Selection depends on panel design and actuator engagement requirements.

Q: Is the 34ADP53B1M1QT compatible with the M2029SD3W01 panel cutout?

A: Both parts use 1/4-40 bushing thread and 6.35mm panel cutout diameter, making them mechanically compatible for panel mounting. The 34ADP53B1M1QT has a longer actuator (13.97mm vs. 10.50mm), which may require panel design adjustment if actuator protrusion is critical.

Q: Why does the A231S1HZQ show "Vendor Undefined" for REACH status?

A: REACH status indicates regulatory compliance documentation availability. "Vendor Undefined" means the manufacturer has not provided explicit REACH compliance certification. Verify with the supplier before selecting this part for applications requiring documented REACH compliance.

Q: Can I substitute the M2029SD3W01 with a part rated for 120V AC instead of 125V AC?

A: Substitution with 120V rated parts is acceptable for applications operating at or below 120V AC. The M2029SD3W01 is rated for 125V; using a 120V-rated switch in a 125V circuit exceeds the substitute part's voltage limit. Verify actual circuit voltage before selecting a 120V alternative.

Q: What does "On-Off-Mom" switch function mean?

A: "On-Off-Mom" indicates the switch has three positions: On (maintained), Off (maintained), and Momentary (spring-return). All listed substitute parts share this function with the M2029SD3W01.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts are ROHS3 compliant. The 34ADP51B1M1QT and 34ADP53B1M1QT are RoHS compliant (not ROHS3). Verify compliance requirements for your application before final selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message