MNG18-187DFK Equivalent & Substitute Parts

Part Overview

The MNG18-187DFK is a 0.187" (4.75mm) Quick Connect Female crimp connector manufactured by 3M under the Scotchlok™ series. This terminal is designed for 18-22 AWG wire applications with non-mating end insulation and free-hanging in-line mounting. The part maintains Active product status and is RoHS Compliant, making it suitable for current production and replacement applications where quick-connect termination is required.

Substitute parts become necessary when original inventory is unavailable, when supply chain optimization is required, or when design flexibility permits equivalent alternatives that meet identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Tab Width	0.187" (4.75mm)
Tab Thickness	0.020" (0.51mm)
Wire Gauge	18-22 AWG
Gender	Female
Termination Type	Crimp
Insulation	Non-Mating End Insulated
Contact Material	Brass
Contact Finish	Tin
Mounting Type	Free Hanging (In-Line)
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MNG18-187DFK is determined by strict equivalence across the following critical parameters:

Tab Width: 0.187" (4.75mm) — determines mechanical fit in mating connectors
Tab Thickness: 0.020" (0.51mm) — ensures proper contact pressure and electrical performance
Wire Gauge: 18-22 AWG — defines current-carrying capacity and crimp compatibility
Gender: Female — establishes mating polarity
Termination: Crimp — specifies wire attachment method
Insulation: Non-Mating End Insulated — provides electrical safety at the wire interface
Contact Material and Finish: Brass with Tin — ensures corrosion resistance and conductivity
RoHS Compliance: Required for regulatory alignment

The substitute part 640917-1 (TE Connectivity AMP Connectors, Faston/PIDG series) meets all critical parameters and qualifies as a direct equivalent for the MNG18-187DFK.

Parameter Comparison

Parameter	MNG18-187DFK (3M Scotchlok™)	640917-1 (TE Connectivity Faston/PIDG)	Match Status
Tab Width	0.187" (4.75mm)	0.187" (4.75mm)	Equivalent
Tab Thickness	0.020" (0.51mm)	0.020" (0.51mm)	Equivalent
Wire Gauge	18-22 AWG	18-22 AWG	Equivalent
Gender	Female	Female	Equivalent
Termination	Crimp	Crimp	Equivalent
Insulation	Non-Mating End Insulated	Non-Mating End Insulated	Equivalent
Contact Material	Brass	Brass	Equivalent
Contact Finish	Tin	Tin	Equivalent
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Equivalent
Color	Red	Red	Equivalent
RoHS Status	RoHS Compliant	RoHS Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
Length - Overall	0.770" (19.56mm)	0.800" (20.32mm)	Minor Variation
Insulation Diameter	0.145" (3.68mm)	0.135" (3.43mm)	Minor Variation

Engineering Selection Recommendations

Both MNG18-187DFK and 640917-1 maintain Active product status and full RoHS Compliance, confirming suitability for current and future production environments. The electrical and mechanical parameters are equivalent across all critical dimensions that determine connector interchangeability.

Minor dimensional variations in overall length (0.030" difference) and insulation diameter (0.010" difference) do not affect functional compatibility in standard quick-connect applications, as these parameters fall within typical manufacturing tolerances for this connector class and do not impact mating performance or electrical characteristics.

Selection between these parts should be based on inventory availability, lead time requirements, and supply chain strategy rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can 640917-1 be used as a direct replacement for MNG18-187DFK in existing designs?

A: Yes. Both connectors share identical tab width (0.187"), tab thickness (0.020"), wire gauge rating (18-22 AWG), gender (Female), termination method (Crimp), insulation type (Non-Mating End Insulated), contact material (Brass with Tin finish), and mounting configuration (Free Hanging In-Line). All critical parameters for mechanical and electrical compatibility are equivalent.

Q: What is the significance of the 0.030" difference in overall length?

A: The overall length variation (MNG18-187DFK at 0.770" versus 640917-1 at 0.800") represents a minor dimensional difference that does not affect connector mating, electrical performance, or standard application compatibility. This variation is typical across different manufacturer designs for equivalent connector classes.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts are RoHS Compliant and carry MSL Rating 1 (Unlimited moisture sensitivity level). The MNG18-187DFK lists REACH Status as REACH Unaffected, while 640917-1 lists REACH Status as Vendor Undefined. Both carry identical ECCN (EAR99) and HTSUS (8536.90.4000) classifications.

Q: What wire gauges are supported by these connectors?

A: Both connectors support 18-22 AWG wire gauges. This range accommodates standard industrial and automotive wiring applications within the specified amperage limits for 0.187" tab connectors.

Q: Can these connectors be used interchangeably in the same connector housing or receptacle?

A: Yes. The identical tab width (0.187") and tab thickness (0.020") ensure mechanical fit compatibility with standard 0.187" quick-connect receptacles and housings designed for this connector class.

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