Equivalent & Substitute Parts for 91MCE1-SQ

Part Overview

The 91MCE1-SQ is a snap action DPST switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is rated for 6A AC at 120V and 550mA DC at 125V, featuring a round pin plunger actuator with IP67 ingress protection. The product is currently obsolete, necessitating identification of active equivalent alternatives to maintain system functionality and ensure continued component availability for maintenance and new installations.

Substiute Parts

91MCE1-SQ

Honeywell Sensing and Productivity SolutionsIn Stock: 93691MCE1-SQ Datasheet

Current PartRFQ

NGCMA00NX01B

Honeywell Sensing and Productivity SolutionsIn Stock: 1109NGCMA00NX01B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 91MCE1-SQ is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration: DPST-NO/NC
• Switch function: On-Mom, Off-Mom
• Current rating: 6A AC minimum, 550mA DC minimum
• Voltage rating: 120V AC minimum, 125V DC minimum

Mechanical & Environmental Compatibility Requirements:

• Actuator type: Round (Pin Plunger)
• Mounting type: Chassis Mount
• Termination style: Connector
• Ingress protection: IP67 minimum
• Operating temperature range: Must encompass or match -25°C to 85°C

Lifecycle & Compliance Requirements:

• Electrical life: 500,000 cycles minimum
• Mechanical life: 5,000,000 cycles minimum
• RoHS compliance: Required
• Moisture sensitivity level: 1 (Unlimited)

The NGCMA00NX01B meets all critical electrical and mechanical parameters, with the exception of operating temperature range (rated to 75°C versus 85°C maximum on the original part). This represents a minor thermal limitation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The NGCMA00NX01B is the designated equivalent substitute for the obsolete 91MCE1-SQ based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical circuit configuration (DPST-NO/NC), switch function (On-Mom, Off-Mom), current ratings (6A AC, 550mA DC), and voltage ratings (120V AC, 125V DC). Electrical performance is fully equivalent.

Mechanical Equivalence: Both parts feature identical actuator type (round pin plunger), mounting type (chassis mount), termination style (connector), and ingress protection rating (IP67). Mechanical interface compatibility is confirmed.

Compliance & Lifecycle: Both parts are RoHS compliant with MSL 1 (Unlimited) rating. Electrical and mechanical life specifications are identical at 500,000 and 5,000,000 cycles respectively.

Operational Limitation: The NGCMA00NX01B operates within a temperature range of -25°C to 75°C, compared to the original part's -25°C to 85°C range. Applications requiring operation above 75°C must be evaluated separately.

Mechanical Characteristics: The substitute part exhibits higher operating force (1122gf versus 816gf), increased pretravel (0.083" versus 0.063"), reduced differential travel (0.047" versus 0.055"), and increased overtravel (0.193" versus 0.134"). These differences reflect design evolution within the NGC series and do not affect electrical substitution validity but may impact actuator interface design.

Product Status: The NGCMA00NX01B is active production status with 1024 units in stock, ensuring long-term availability compared to the obsolete 91MCE1-SQ.

Frequently Asked Questions (FAQ)

Q: Can the NGCMA00NX01B directly replace the 91MCE1-SQ in existing applications?

A: The NGCMA00NX01B provides electrical and mechanical equivalence for the 91MCE1-SQ across all critical parameters including circuit configuration, current and voltage ratings, actuator type, mounting, and ingress protection. Direct substitution is supported for applications operating within the -25°C to 75°C temperature range. Applications requiring operation above 75°C require separate evaluation.

Q: What are the key differences between these two parts?

A: The primary differences are operating force (1122gf versus 816gf), pretravel (0.083" versus 0.063"), differential travel (0.047" versus 0.055"), overtravel (0.193" versus 0.134"), and maximum operating temperature (75°C versus 85°C). These represent design refinements in the NGC series. Electrical and mechanical interface compatibility remains unchanged.

Q: Why is the operating force different between the two parts?

A: Operating force variation reflects design evolution between the 91MCE series and the NGC series. Both parts maintain the same switch function (On-Mom, Off-Mom) and actuator type (round pin plunger), but the NGC design incorporates a higher actuation force specification. This does not affect electrical substitution validity.

Q: Are both parts RoHS compliant?

A: Yes, both the 91MCE1-SQ and NGCMA00NX01B are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the inventory status of the substitute part?

A: The NGCMA00NX01B is in active production with 1024 units currently in stock, providing reliable long-term availability. The original 91MCE1-SQ is obsolete with 867 units remaining in inventory.

Q: Do the connector terminations match between these parts?

A: Yes, both parts use connector termination style, ensuring compatibility with existing connector interfaces.

Q: What is the electrical life expectancy for the substitute part?

A: The NGCMA00NX01B is rated for 500,000 electrical cycles, identical to the original 91MCE1-SQ specification.