M20-9751642 Equivalent & Substitute Parts

Part Overview

The M20-9751642 is a rectangular connector header manufactured by Harwin Inc., featuring a right-angle through-hole mount with 16 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part serves board-to-board or cable interconnection applications requiring solder termination with push-pull fastening.

Key Parameters

Parameter	M20-9751642 Value
Connector Type	Header, Cuttable
Pitch - Mating	0.100" (2.54mm)
Number of Positions	16
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Contact Type	Male Pin
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the M20-9751642 are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates maintain the core functional parameters: 16-position, 0.100" (2.54mm) pitch, right-angle through-hole header configuration with male pins, push-pull fastening, and solder termination.

The primary substitution criteria are:

Pitch - Mating: 0.100" (2.54mm) — exact match required
Number of Positions: 16 — exact match required
Mounting Type: Through Hole, Right Angle — exact match required
Contact Type: Male Pin — exact match required
Fastening Type: Push-Pull — exact match required
Termination: Solder — exact match required
Material Flammability Rating: UL94 V-0 — maintained across all substitutes
Insulation Color: Black — maintained across all substitutes

Secondary parameters including contact finish, contact material, insulation material, and operating temperature range vary among substitutes but remain within acceptable engineering tolerances for board-to-board interconnection applications.

Parameter Comparison

Parameter	M20-9751642	M20-9751646	68015-116	69191-116	69191-216	69191-516	69191-616H	77315-113-16LF
Manufacturer	Harwin Inc.	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	M20	M20	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK®
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
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)
Number of Positions	16	16	16	16	16	16	16	16
Number of Rows	1	1	1	1	1	1	1	1
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Solder	Solder	Kinked Pin, Solder	Kinked Pin, Solder	Kinked Pin, Solder	Kinked Pin, Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	3A per Contact	3A per Contact	Not specified	Not specified	Not specified	Not specified	Not specified	3A per Contact
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	Not specified	-65°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS Compliant

Engineering Selection Recommendations

Primary Substitute: M20-9751646

The M20-9751646 is the manufacturer-recommended direct replacement for the obsolete M20-9751642. Both parts are from Harwin Inc.'s M20 series and maintain identical electrical and mechanical specifications. The M20-9751646 is active in production with 2538 units in stock, ensuring long-term availability. Both parts are ROHS3 compliant and rated for -40°C to 105°C operation with 3A per contact current capacity. The only difference is contact finish on the mating surface (tin versus gold), which does not affect functional compatibility in standard board-to-board applications.

Secondary Substitutes: Amphenol ICC (FCI) BERGSTIK® Series

The BERGSTIK® II series (68015-116, 69191-116, 69191-216, 69191-516, 69191-616H) and BERGSTIK® series (77315-113-16LF) from Amphenol ICC (FCI) provide functional equivalence with the following considerations:

All maintain 16-position, 0.100" (2.54mm) pitch, right-angle through-hole configuration
All feature push-pull fastening and solder termination
Contact material differs (phosphor bronze versus brass), suitable for equivalent signal integrity
BERGSTIK® II variants use kinked pin termination; BERGSTIK® uses standard solder termination
68015-116 is RoHS non-compliant; 77315-113-16LF is RoHS compliant
77315-113-16LF offers extended operating temperature range (-65°C to 125°C) and 3A per contact rating

Compliance Considerations

For applications requiring RoHS compliance, select M20-9751646 or 77315-113-16LF. The BERGSTIK® II variants (68015-116, 69191-116, 69191-216, 69191-516, 69191-616H) are RoHS non-compliant and suitable only for legacy or non-regulated applications.

Frequently Asked Questions (FAQ)

Q: Can M20-9751646 directly replace M20-9751642 without PCB redesign?

A: Yes. The M20-9751646 maintains identical pitch, position count, mounting type, and termination method. The contact finish difference (tin versus gold on mating surface) does not require design changes for standard applications.

Q: What is the difference between BERGSTIK® and BERGSTIK® II series?

A: BERGSTIK® II (69191-xxx, 68015-116) uses kinked pin termination for improved solder joint reliability. BERGSTIK® (77315-113-16LF) uses standard solder termination. Both maintain 0.100" (2.54mm) pitch and 16-position configuration. Contact material differs (phosphor bronze versus brass in the original part).

Q: Are Amphenol ICC (FCI) parts pin-compatible with Harwin M20 series?

A: Yes, for electrical and mechanical function. All substitute parts maintain identical pitch, position count, contact type, and mounting orientation. Physical dimensions may vary slightly due to different insulation heights and contact lengths, but PCB footprints designed for 0.100" (2.54mm) pitch 16-position headers accommodate all listed substitutes.

Q: Which substitute offers the best long-term availability?

A: M20-9751646 is the manufacturer-recommended replacement with active production status and 2538 units in stock. For Amphenol alternatives, 77315-113-16LF (BERGSTIK®) offers RoHS compliance and extended temperature range, supporting long-term design continuity.

Q: Do I need to change my PCB layout to use a substitute part?

A: No. All substitute parts maintain 0.100" (2.54mm) pitch and 16-position single-row configuration with right-angle through-hole mounting. Existing PCB footprints are compatible. Verify mechanical clearance for the specific connector body height if space is constrained.

Q: What is the significance of kinked pin termination in BERGSTIK® II variants?

A: Kinked pin termination provides mechanical retention during PCB assembly, reducing solder joint stress and improving reliability in high-vibration or thermal cycling environments. Standard solder termination (M20-9751646, 77315-113-16LF) is suitable for standard applications.

Q: Are there current or voltage rating differences between substitutes?

A: M20-9751642, M20-9751646, and 77315-113-16LF are rated for 3A per contact. Amphenol BERGSTIK® II variants (68015-116, 69191-116, 69191-216, 69191-516, 69191-616H) do not specify current or voltage ratings in available documentation. For applications requiring explicit current specifications, use Harwin or 77315-113-16LF.

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