C&K U11MD9AV2ME Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K U11MD9AV2ME is a toggle switch with SPDT (Single Pole Double Throw) configuration rated for 5A at 120V AC and 28V DC. This part operates in the 7000 series and features through-hole, right-angle vertical mounting with PC pin termination. The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical compatibility while meeting current availability and compliance requirements.

Key Parameters

Parameter	Value
Circuit Configuration	SPDT (Single Pole Double Throw)
Switch Function	On-On
Current Rating	5A (AC/DC)
Voltage Rating - AC	120V
Voltage Rating - DC	28V
Mounting Type	Through Hole, Right Angle, Vertical
Termination Style	PC Pin
Actuator Type	Standard Round
Operating Temperature Range	-30°C to 85°C
Electrical Life	100,000 Cycles
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

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

Circuit Configuration & Function: All substitutes must maintain SPDT On-On configuration
Electrical Ratings: Current and voltage ratings must meet or exceed the original specification (5A at 120V AC / 28V DC minimum)
Mounting & Termination: Through-hole, right-angle vertical mounting with PC pin termination is required
Operating Temperature: Must support -30°C to 85°C range
Mechanical Compatibility: Actuator type and length affect panel integration; variations are noted where applicable

Substitutes are grouped into two categories:

Direct Equivalent: U11MD9AV2SE (C&K) — identical electrical and mechanical specifications with active product status.

Compatible Alternatives: Parts from E-Switch, TE Connectivity, and Electroswitch that meet core electrical requirements but may have variations in actuator length, electrical life, or voltage derating. These are suitable where mechanical envelope and cycle life requirements permit.

Parameter Comparison

Part Number	Manufacturer	Circuit	Current Rating	Voltage AC	Voltage DC	Mounting	Actuator Length (mm)	Electrical Life	Product Status
U11MD9AV2ME	C&K	SPDT	5A	120V	28V	Through Hole, Right Angle, Vertical	6.86	100,000 Cycles	Obsolete
U11MD9AV2SE	C&K	SPDT	5A	120V	28V	Through Hole, Right Angle, Vertical	6.86	100,000 Cycles	Active
100SP1T2B4M7QE	E-Switch	SPDT	5A	120V	28V	Through Hole, Right Angle, Vertical	5.08	40,000 Cycles	Active
100SP1T2B4M7RE	E-Switch	SPDT	0.4VA	20V	20V	Through Hole, Right Angle, Vertical	5.08	40,000 Cycles	Active
100SP1T2B2M7QE	E-Switch	SPDT	5A	120V	28V	Through Hole, Right Angle, Vertical	5.08	40,000 Cycles	Active
1825142-5	TE Connectivity ALCOSWITCH	SPDT	0.4VA	20V	20V	Through Hole, Right Angle, Vertical	7.62	6,000 Cycles	Active
A123P41D9AV2B	Electroswitch	SPDT	0.5VA	28V	28V	Through Hole, Right Angle, Vertical	6.35	60,000 Cycles	Active
WT123M1D9AV2B	Electroswitch	SPDT	0.5VA	28V	28V	Through Hole, Right Angle, Vertical	7.60	60,000 Cycles	Active
WT123M1D9AV2Q	Electroswitch	SPDT	6A	125V	28V	Through Hole, Right Angle, Vertical	7.60	60,000 Cycles	Active

Engineering Selection Recommendations

Primary Recommendation: U11MD9AV2SE (C&K) is the direct equivalent with identical electrical and mechanical specifications. This part maintains 100,000-cycle electrical life and is currently in active production status with ROHS3 compliance and REACH affected designation.

Secondary Recommendations for Full-Rating Applications (5A at 120V AC):

100SP1T2B4M7QE (E-Switch) and 100SP1T2B2M7QE (E-Switch) meet full electrical ratings but feature reduced actuator length (5.08mm vs. 6.86mm) and lower electrical life (40,000 cycles). These are suitable where panel depth constraints exist and cycle life requirements do not exceed 40,000 operations.
WT123M1D9AV2Q (Electroswitch) exceeds electrical ratings (6A at 125V AC) with 60,000-cycle life and 7.60mm actuator length. This part is suitable for applications requiring higher voltage margin or longer mechanical reach.

Limited-Rating Alternatives (below original 5A/120V specification):

100SP1T2B4M7RE, 100SP1T2B2M7RE (E-Switch), and 1825142-5 (TE Connectivity) are rated for 0.4VA at 20V and are suitable only for low-power signal switching applications. These parts are not suitable for the original 5A/120V application.
A123P41D9AV2B and WT123M1D9AV2B (Electroswitch) are rated for 0.5VA at 28V and are limited to low-power DC applications.

All recommended substitutes maintain SPDT On-On configuration, through-hole right-angle vertical mounting, PC pin termination, and -30°C to 85°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use 100SP1T2B4M7QE as a direct replacement for U11MD9AV2ME?

A: 100SP1T2B4M7QE meets the full 5A/120V electrical specification and maintains SPDT On-On configuration with identical mounting and termination. However, the actuator length is 1.78mm shorter (5.08mm vs. 6.86mm), and electrical life is reduced to 40,000 cycles. Verify panel cutout compatibility and confirm that application cycle life does not exceed 40,000 operations.

Q: What is the difference between the E-Switch 100SP1T2B4M7QE and 100SP1T2B4M7RE models?

A: Both parts share identical mechanical specifications and mounting. The 100SP1T2B4M7QE is rated for 5A at 120V AC, while 100SP1T2B4M7RE is rated for 0.4VA at 20V. The 100SP1T2B4M7RE is suitable only for low-power signal applications and cannot replace the original part in 5A/120V circuits.

Q: Is WT123M1D9AV2Q suitable for my application?

A: WT123M1D9AV2Q exceeds the original electrical specification (6A at 125V AC vs. 5A at 120V AC) and provides 60,000-cycle electrical life. The 7.60mm actuator length is 0.74mm longer than the original. This part is suitable if panel depth permits the longer actuator and higher voltage rating is acceptable.

Q: Why do some substitutes have lower electrical life ratings?

A: Electrical life varies by manufacturer design and switch mechanism. E-Switch 100 series parts are rated for 40,000 cycles, while C&K 7000 series and Electroswitch parts provide 60,000 to 100,000 cycles. Select based on application duty cycle requirements.

Q: Are all listed substitutes RoHS compliant?

A: All listed substitutes carry ROHS3 compliance. REACH status varies: U11MD9AV2SE is REACH Affected, while E-Switch parts are REACH Unaffected. Verify compliance requirements for your specific application and region.

Q: Can I use the TE Connectivity 1825142-5 in place of the original part?

A: 1825142-5 is rated for 0.4VA at 20V, which is below the original 5A/120V specification. This part is suitable only for low-power signal switching. Additionally, electrical life is limited to 6,000 cycles. This part is not recommended for the original application.

Q: What is the impact of different actuator lengths on my design?

A: Actuator length affects panel depth and operator reach. The original U11MD9AV2ME has a 6.86mm actuator. E-Switch alternatives (5.08mm) require less panel depth, while Electroswitch WT series (7.60mm) require more. Verify mechanical fit before substitution.

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