Equivalent & Substitute Parts for Honeywell 91MCE28-P1B

Part Overview

The Honeywell 91MCE28-P1B is a snap action DPST switch rated for 6A at 120V AC with roller plunger actuation and panel mount configuration. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system maintenance and new design implementations. The switch features IP67 ingress protection, cable lead termination, and operates across -25°C to 85°C with 500,000 electrical cycles and 5,000,000 mechanical cycles.

Key Parameters

Parameter	Value
Circuit Configuration	DPST-NO/NC
Current Rating (AC)	6A
Current Rating (DC)	550mA
Voltage Rating (AC)	120V
Voltage Rating (DC)	125V
Actuator Type	Roller Plunger
Mounting Type	Panel Mount
Termination Style	Cable Leads
Ingress Protection	IP67
Operating Temperature Range	-25°C to 85°C
Electrical Life	500,000 Cycles
Mechanical Life	5,000,000 Cycles
RoHS Compliance	Yes

Substitute Part Grouping Explanation

Substitution eligibility for the 91MCE28-P1B is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

Circuit configuration must be DPST-NO/NC
Current rating minimum 6A at 120V AC
DC rating minimum 550mA at 125V
Electrical life minimum 500,000 cycles

Mechanical Compatibility Requirements:

Actuator type must be roller plunger
Mounting configuration must be panel mount
Termination must be cable leads
Ingress protection minimum IP67
Mechanical life minimum 5,000,000 cycles

Environmental & Compliance Requirements:

Operating temperature range must encompass -25°C to 85°C or be compatible with system operating envelope
RoHS compliance required
Moisture sensitivity level MSL 1 or equivalent

The substitute part NGCMB10AX01P meets all electrical and mechanical compatibility criteria. Differences in pretravel, differential travel, and overtravel specifications remain within acceptable mechanical tolerance ranges for panel-mounted snap action switches of this class.

Parameter Comparison

Parameter	91MCE28-P1B	NGCMB10AX01P	Compatibility
Manufacturer	Honeywell Sensing and Productivity Solutions	Honeywell Sensing and Productivity Solutions	Same
Circuit Configuration	DPST-NO/NC	DPST-NO/NC	Equivalent
Switch Function	On-Mom, Off-Mom	On-Mom, Off-Mom	Equivalent
Current Rating (AC)	6A	6A	Equivalent
Current Rating (DC)	550mA	550mA	Equivalent
Voltage Rating (AC)	120V	120V	Equivalent
Voltage Rating (DC)	125V	125V	Equivalent
Actuator Type	Roller Plunger	Roller Plunger	Equivalent
Mounting Type	Panel Mount	Panel Mount	Equivalent
Termination Style	Cable Leads	Cable Leads	Equivalent
Ingress Protection	IP67	IP67	Equivalent
Operating Force	1122gf	1122gf	Equivalent
Pretravel	0.071" (1.8mm)	0.083" (2.1mm)	Compatible
Differential Travel	0.031" (0.8mm)	0.047" (1.2mm)	Compatible
Overtravel	0.125" (3.2mm)	0.193" (4.9mm)	Compatible
Operating Temperature	-25°C to 85°C	-25°C to 75°C	Substitute range narrower
Electrical Life	500,000 Cycles	500,000 Cycles	Equivalent
Mechanical Life	5,000,000 Cycles	5,000,000 Cycles	Equivalent
RoHS Status	Compliant	Compliant	Equivalent
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

Primary Substitute: NGCMB10AX01P

The NGCMB10AX01P is the qualified equivalent for the obsolete 91MCE28-P1B based on the following engineering criteria:

Electrical Equivalence: Both components share identical circuit configuration (DPST-NO/NC), current ratings (6A AC / 550mA DC), and voltage ratings (120V AC / 125V DC). Electrical life specifications are equivalent at 500,000 cycles.

Mechanical Equivalence: Actuator type, mounting configuration, and termination style are identical. Operating force is equivalent at 1122gf. Mechanical life specifications are equivalent at 5,000,000 cycles. Variations in pretravel, differential travel, and overtravel fall within acceptable mechanical tolerance ranges for snap action switches of this classification.

Environmental Compatibility: Both components operate across -25°C to 75°C. The substitute part operates at a maximum of 75°C compared to the original 85°C upper limit. System applications operating below 75°C experience no thermal limitation. Applications requiring operation above 75°C require thermal analysis to confirm compatibility.

Compliance & Availability: The NGCMB10AX01P is RoHS compliant, MSL 1 rated, and currently active in production with documented inventory availability. The original 91MCE28-P1B is obsolete and no longer manufactured.

Frequently Asked Questions (FAQ)

Q: Can NGCMB10AX01P directly replace 91MCE28-P1B in existing designs?

A: Yes, for applications operating at or below 75°C. The substitute part meets all electrical and mechanical specifications. Applications requiring operation above 75°C require thermal analysis to confirm system compatibility.

Q: Are the mechanical travel differences significant?

A: No. The pretravel, differential travel, and overtravel variations between the two parts remain within acceptable mechanical tolerance ranges for panel-mounted snap action switches. Both parts maintain identical operating force at 1122gf.

Q: What is the impact of the narrower operating temperature range?

A: The NGCMB10AX01P operates from -25°C to 75°C versus the original -25°C to 85°C. For systems operating within this narrower range, there is no impact. Systems requiring operation above 75°C must verify thermal compatibility through application analysis.

Q: Are both parts RoHS compliant?

A: Yes. Both the 91MCE28-P1B and NGCMB10AX01P are RoHS compliant with MSL 1 moisture sensitivity rating.

Q: What is the difference in product status?

A: The 91MCE28-P1B is obsolete and no longer manufactured. The NGCMB10AX01P is active in production, ensuring long-term availability and supply chain continuity.

Q: Are there packaging differences?

A: The original 91MCE28-P1B was supplied with cable leads. The NGCMB10AX01P is supplied in bulk packaging. Both maintain identical cable lead termination style.

Q: Do both parts have the same electrical life rating?

A: Yes. Both components are rated for 500,000 electrical cycles and 5,000,000 mechanical cycles.

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