M20-9983246 Equivalent & Substitute Parts

Part Overview

The M20-9983246 is a rectangular connector header manufactured by Harwin Inc., featuring 64 positions with 2.54mm (0.100") pitch spacing. This through-hole component is designed for board-to-board or cable applications with unshrouded, cuttable construction. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9983246
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	64
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Tin
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the M20-9983246 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Number of Positions: 64
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Connector Type: Header (Cuttable or Breakaway acceptable)
Contact Finish - Mating: Tin or Gold (both acceptable for electrical compatibility)
Insulation Material: Polyamide (PA6T), Nylon 6T, Liquid Crystal Polymer (LCP), or Thermoplastic (all UL94 V-0 rated)
Contact Material: Brass or Copper Alloy (both acceptable)
Contact Length - Mating: Variations permitted within mechanical envelope constraints
Contact Length - Post: Variations permitted within PCB thickness constraints
Overall Contact Length: Variations permitted based on application requirements
Insulation Height: Minor variations acceptable (0.090" to 0.100")

Substitute parts must maintain all critical parameters while allowing documented variations in contact geometry and material composition that do not affect electrical performance or mechanical mating.

Parameter Comparison

Parameter	M20-9983246 (Main)	M20-9983245	0010897641	0010897643	0010977646	0702871275	0751020109	0901310952	2364-6221-TG	68779-264HLF	77313-122-64LF
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Molex	Molex	Molex	Molex	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Number of Positions	64	64	64	64	64	64	64	64	64	64	64
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Kinked Pin, Solder	Press-Fit, Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Tin	Gold	Tin	Gold	Gold	Gold	Tin	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™
Current Rating	3A per Contact	3A per Contact	—	—	—	—	—	—	3A	3A	3A per Contact
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	—	—	—	—	—	—	-55°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Discontinued at DiGi Electronics	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: M20-9983245 (Harwin Inc.)

The M20-9983245 is the manufacturer-recommended direct substitute for the obsolete M20-9983246. Both parts are from the same M20 series and maintain identical electrical and mechanical specifications with the exception of contact finish (Gold vs. Tin). The M20-9983245 is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. This part provides the highest compatibility with existing designs and documentation.

Secondary Recommendations: Molex C-Grid Series (0010897641, 0010897643, 0010977646, 0702871275, 0751020109, 0901310952)

Molex C-Grid series connectors provide full electrical and mechanical compatibility across all critical parameters. These parts are active in production with ROHS3 compliance. Variations exist in contact geometry and insulation material composition:

0010897641 and 0010897643: C-Grid 70280 series with gold contact finish
0010977646: C-Grid 70280 series with reduced gold plating thickness (15.0µin vs. 30.0µin)
0702871275: C-Grid 70287 series with kinked pin termination option
0751020109: C-Grid 75102 series with press-fit termination option (discontinued at DiGi Electronics)
0901310952: C-Grid III 90131 series with extended operating temperature range

Tertiary Recommendations: 3M 2364-6221-TG and Amphenol ICC (FCI) Series (68779-264HLF, 77313-122-64LF)

These parts maintain all critical electrical and mechanical parameters. The 3M 2364-6221-TG is RoHS non-compliant and REACH affected, limiting applicability in regulated markets. Amphenol ICC (FCI) BERGSTIK® series parts (68779-264HLF and 77313-122-64LF) are RoHS compliant with extended operating temperature ranges (-65°C ~ 130°C), suitable for demanding thermal environments.

Compliance Considerations:

All recommended substitutes except 2364-6221-TG maintain ROHS3 compliance. For applications requiring RoHS3 compliance, exclude 2364-6221-TG from selection. All substitute parts maintain UL94 V-0 flammability rating and MSL 1 (Unlimited) moisture sensitivity level.

Frequently Asked Questions (FAQ)

Q: Can M20-9983245 be used as a direct replacement for M20-9983246?

A: Yes. The M20-9983245 is the manufacturer-recommended substitute. Both parts share identical electrical and mechanical specifications within the M20 series. The primary difference is contact finish (Gold vs. Tin), which does not affect electrical compatibility. The M20-9983245 is active in production, addressing the obsolescence of the M20-9983246.

Q: What are the key differences between Harwin M20 and Molex C-Grid series connectors?

A: Both series maintain identical pitch (2.54mm), position count (64), row configuration (2 rows), and mounting type (through hole). Differences exist in contact geometry, insulation material composition, and available contact finishes. Molex C-Grid series offers multiple variants with different contact lengths and termination options. Both series are ROHS3 compliant and suitable for equivalent applications.

Q: Are gold-plated contacts required, or can tin-plated contacts be substituted?

A: Both gold and tin contact finishes are acceptable for electrical compatibility. Contact finish selection depends on application requirements. Gold finishes provide enhanced corrosion resistance in high-humidity or corrosive environments. Tin finishes are suitable for standard industrial applications. The M20-9983246 uses tin finish; the M20-9983245 uses gold finish. Both are electrically equivalent.

Q: What is the significance of connector type variations (Cuttable vs. Breakaway)?

A: Both cuttable and breakaway connector types maintain identical electrical and mechanical mating characteristics. Cuttable connectors allow individual pin removal from the header strip. Breakaway connectors feature pre-scored sections for position separation. Selection depends on assembly and application requirements. Both types are mechanically and electrically compatible for board-to-board or cable applications.

Q: Can parts with different insulation materials be interchanged?

A: Yes. The M20-9983246 uses Polyamide (PA6T) Nylon 6T insulation. Substitute parts use Liquid Crystal Polymer (LCP) or Thermoplastic insulation. All materials are UL94 V-0 rated and maintain equivalent electrical and mechanical performance. Material selection affects thermal and chemical resistance characteristics but does not impact mating compatibility or electrical function.

Q: Are there any packaging considerations when selecting substitutes?

A: Packaging format (Bulk, Tray, Bag) affects handling and storage but does not impact electrical or mechanical compatibility. The M20-9983246 packaging is not specified. Substitute parts are available in Bulk, Tray, or Bag formats. Packaging selection depends on production volume and assembly process requirements.

Q: What is the impact of contact length variations on compatibility?

A: Contact length variations (mating and post lengths) affect mechanical envelope and PCB thickness accommodation but do not impact electrical compatibility. Longer contact lengths provide greater mating depth and post length for thicker PCBs. Selection depends on specific PCB thickness and mechanical clearance requirements. All listed substitutes maintain compatible mating interfaces.

Q: Is RoHS compliance a mandatory selection criterion?

A: RoHS compliance is mandatory for applications subject to EU RoHS Directive or equivalent regulations. All recommended substitutes except 2364-6221-TG are ROHS3 compliant. For regulated applications, exclude 2364-6221-TG from selection. For non-regulated applications, RoHS status does not affect electrical or mechanical compatibility.

Q: Can parts with different operating temperature ranges be used interchangeably?

A: Operating temperature range does not affect electrical compatibility within specified limits. The M20-9983246 operates -40°C ~ 105°C. Substitutes with extended ranges (-55°C ~ 105°C or -65°C ~ 130°C) are suitable for equivalent or more demanding thermal environments. Selection depends on application temperature requirements. Parts with narrower temperature ranges are not suitable for applications exceeding their specified limits.

Q: What current rating should be used for design calculations?

A: The M20-9983246 is rated 3A per contact. Molex C-Grid series parts do not specify current rating in provided data. The 3M 2364-6221-TG and Amphenol ICC (FCI) parts are rated 3A per contact. For design calculations, use the specified current rating of the selected part. If current rating is not specified, consult manufacturer documentation before finalizing design.

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