Equivalent & Substitute Parts for Honeywell 91MCE27-P2

Part Overview

The Honeywell 91MCE27-P2 is a snap action DPST switch rated for 6A at 120V AC with panel mount configuration and IP67 ingress protection. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system maintenance and new design implementations. The switch features a round pin plunger actuator, cable lead termination, and dual-pole single-throw contact configuration with momentary operation capability.

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	Round (Pin 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 91MCE27-P2 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

Circuit configuration must be DPST-NO/NC
Current rating must support minimum 6A AC and 550mA DC
Voltage rating must support minimum 120V AC and 125V DC

Mechanical Compatibility Requirements:

Actuator type must be round pin plunger
Mounting configuration must be panel mount
Termination must be cable leads
Ingress protection must be IP67 or equivalent

Environmental & Lifecycle Requirements:

Operating temperature range must encompass the application environment
Electrical life must meet or exceed 500,000 cycles
Mechanical life must meet or exceed 5,000,000 cycles
RoHS compliance status must be maintained

The Honeywell NGCMA20AX01N satisfies all substitution criteria and is classified as an active product, providing long-term availability and supply chain continuity.

Parameter Comparison

Parameter	91MCE27-P2	NGCMA20AX01N	Compatibility
Manufacturer	Honeywell Sensing and Productivity Solutions	Honeywell Sensing and Productivity Solutions	Identical
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	Round (Pin Plunger)	Round (Pin 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
Operating Temperature	-25°C to 85°C	-25°C to 75°C	NGCMA20AX01N range is 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

The Honeywell NGCMA20AX01N is the qualified substitute for the obsolete 91MCE27-P2. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical current and voltage ratings across AC and DC specifications, ensuring direct functional replacement in existing circuit designs.

Mechanical Equivalence: Actuator type, mounting configuration, and termination style are identical, permitting direct mechanical integration without enclosure or panel modifications.

Environmental Compliance: Both components are RoHS compliant and maintain IP67 ingress protection, satisfying regulatory and environmental durability requirements.

Product Lifecycle: The NGCMA20AX01N is classified as active, providing assured long-term availability and supply chain stability compared to the obsolete 91MCE27-P2.

Temperature Range Consideration: The NGCMA20AX01N operating temperature range (-25°C to 75°C) is narrower than the 91MCE27-P2 (-25°C to 85°C). Applications requiring operation above 75°C must be evaluated against actual system thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the NGCMA20AX01N directly replace the 91MCE27-P2 in existing installations?

A: Yes. The NGCMA20AX01N provides electrical and mechanical equivalence across all critical parameters. No circuit modifications or panel alterations are required for direct substitution.

Q: What is the significance of the operating temperature range difference?

A: The NGCMA20AX01N operates to 75°C maximum, while the 91MCE27-P2 operates to 85°C. Applications operating continuously above 75°C must verify thermal performance against actual system conditions. Most industrial control applications operate within the 75°C limit.

Q: Are there packaging differences between these components?

A: The 91MCE27-P2 is supplied with cable leads (2m length specified). The NGCMA20AX01N is supplied in bulk packaging. Both components use identical cable lead termination. Packaging format does not affect electrical or mechanical compatibility.

Q: What mechanical parameters determine substitution eligibility?

A: Operating force (1122gf), pretravel, differential travel, and overtravel specifications must be compatible with the application's actuation mechanism. Both components share identical operating force values, confirming mechanical compatibility.

Q: Is the NGCMA20AX01N available in equivalent quantities?

A: Current inventory for NGCMA20AX01N is 1060 pieces. The 91MCE27-P2 inventory is 1075 pieces. Both components maintain active stock levels suitable for production and maintenance applications.

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