M20-9700645 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9700645 is a right-angle rectangular connector header with 12 positions at 2.54mm pitch, designed for through-hole mounting in board-to-board or cable applications. This part carries an obsolete product status, making equivalent substitutes necessary for ongoing design work and production requirements. The connector features male pins with gold-plated brass contacts, rated for 3A per contact across an operating temperature range of -40°C to 105°C, with UL94 V-0 flammability compliance and full RoHS3 compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9700645
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	12
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Length - Mating	0.276" (7.00mm)
Contact Length - Post	0.118" (3.00mm)
Insulation Height	0.200" (5.08mm)
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
Insulation Color	Black
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9700645 is determined by strict alignment with the following core parameters:

Critical Matching Parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 12
Number of Rows: 2
Row Spacing - Mating: 0.100" (2.54mm)
Mounting Type: Through Hole, Right Angle
Termination: Solder
Contact Type: Male Pin
Fastening Type: Push-Pull
Contact Shape: Square
Material Flammability Rating: UL94 V-0
Insulation Color: Black
Current Rating: 3A per Contact
RoHS Status: RoHS Compliant

Allowable Variations:

Contact Length - Mating: Range 0.230" to 0.276" (5.84mm to 7.00mm)
Contact Length - Post: Range 0.100" to 0.120" (2.54mm to 3.05mm)
Insulation Height: Range 0.190" to 0.200" (4.83mm to 5.08mm)
Contact Material: Brass, Copper Alloy, or Phosphor Bronze
Contact Finish - Mating: Gold or Tin
Operating Temperature: Minimum -40°C, Maximum 105°C or higher
Connector Type: Header, Header Cuttable, or Header Breakaway
Style: Board to Board or Board to Board or Cable
Shrouding: Unshrouded

Substitutes are grouped by contact finish specification and contact material composition, as these directly affect electrical performance and environmental durability within the allowed parameter envelope.

Parameter Comparison

Parameter	M20-9700645 (Harwin)	61301221021 (Würth)	68021-112HLF (Amphenol)	68021-212HLF (Amphenol)	68021-412HLF (Amphenol)	77317-103-12LF (Amphenol)	77317-104-12LF (Amphenol)	77317-112-12LF (Amphenol)	77317-412-12LF (Amphenol)	77317-804-12LF (Amphenol)	77317-812-12LF (Amphenol)
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)
Number of Positions	12	12	12	12	12	12	12	12	12	12	12
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
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)
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	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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 Length - Mating	0.276" (7.00mm)	0.236" (6.00mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.230" (5.84mm)	0.268" (6.80mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Gold, GXT™	Gold, GXT™	Gold, GXT™	Tin	Gold, GXT™	Gold, GXT™
Contact Material	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C
Current Rating	3A per Contact	3A	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact
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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	Not Applicable	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	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status with full RoHS compliance, ensuring long-term availability and regulatory alignment. The Würth Elektronik 61301221021 provides the closest electrical and mechanical match to the original M20-9700645, with identical pitch, position count, and operating temperature range, differing only in contact material composition and moisture sensitivity classification.

The Amphenol ICC BERGSTIK® II series (68021-112HLF, 68021-212HLF, 68021-412HLF) offers enhanced operating temperature capability (-65°C to 125°C) and phosphor bronze contacts with superior corrosion resistance compared to the original brass contacts. These parts are available in three contact finish options: gold with 30.0µin thickness (68021-112HLF), gold with 15.0µin thickness (68021-212HLF), and tin with 100.0µin thickness (68021-412HLF).

The Amphenol ICC BERGSTIK® series (77317-103-12LF, 77317-104-12LF, 77317-112-12LF, 77317-412-12LF, 77317-804-12LF, 77317-812-12LF) provides breakaway connector capability with extended operating temperature range (-65°C to 130°C). These parts are available with gold or tin contact finishes and varying contact length specifications to accommodate different PCB stack-up requirements.

Selection should prioritize parts with active product status and established supply chain presence. Contact finish selection (gold versus tin) should align with existing assembly processes and environmental exposure conditions. Verify mechanical fit within the specific PCB footprint, as contact length variations may affect insertion depth and mating force characteristics.

Frequently Asked Questions (FAQ)

Q: Can I substitute the M20-9700645 with any of the listed parts?

A: Yes, all listed parts meet the critical substitution criteria: 2.54mm pitch, 12 positions in 2 rows, through-hole right-angle mounting, solder termination, male pins, push-pull fastening, square contacts, UL94 V-0 flammability rating, and 3A current rating. All are RoHS compliant with active product status.

Q: What is the difference between the Würth 61301221021 and the Amphenol BERGSTIK® II series?

A: The Würth part maintains the closest dimensional alignment to the original M20-9700645, including identical contact length for mating (0.236" vs. 0.276" original). The Amphenol BERGSTIK® II series uses phosphor bronze contacts instead of brass or copper alloy, offering improved corrosion resistance and extended operating temperature range to 125°C. Contact finish options differ: Würth offers gold only, while Amphenol offers both gold and tin variants.

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

A: BERGSTIK® II parts (68021 series) are standard headers without breakaway capability. BERGSTIK® parts (77317 series) feature breakaway connector design, allowing individual positions to be separated if required. BERGSTIK® series also provides extended operating temperature to 130°C and offers more contact finish and contact length combinations.

Q: Does contact finish affect electrical performance?

A: Contact finish affects corrosion resistance and long-term reliability in specific environments. Gold finishes (30.0µin or 15.0µin thickness) provide superior corrosion resistance and are preferred for high-reliability applications. Tin finishes (78.7µin to 100.0µin thickness) offer cost efficiency and adequate performance in controlled environments. All finishes maintain the 3A current rating and meet UL94 V-0 flammability requirements.

Q: Are there packaging differences between substitutes?

A: Yes. The M20-9700645 is packaged in bulk. Würth 61301221021 is bulk packaged. Amphenol BERGSTIK® II parts (68021 series) are bag packaged. Amphenol BERGSTIK® parts (77317 series) are bulk packaged. Packaging affects handling, storage, and reel compatibility with automated assembly equipment. Verify packaging compatibility with your procurement and assembly processes.

Q: Can I use parts with different contact lengths?

A: Contact length variations (0.230" to 0.276" for mating; 0.100" to 0.120" for post) affect insertion depth and mating force. Verify that the selected substitute accommodates your specific PCB thickness and connector receptacle design. Consult mechanical drawings and assembly specifications before substitution.

Q: What does "Breakaway" mean in the BERGSTIK® series?

A: Breakaway connectors allow individual positions to be separated or removed from the main header body after assembly. This feature is useful for applications requiring modular or reconfigurable connections. Standard BERGSTIK® II headers do not have this capability.

Q: Are all substitutes compatible with the same mating receptacles?

A: All substitutes share identical pitch (2.54mm), position count (12), row spacing (2.54mm), and contact geometry (square male pins). They are mechanically compatible with standard 2.54mm pitch receptacles. However, verify contact length specifications against your specific receptacle design, as minor variations may affect mating force and insertion characteristics.

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

A: The original M20-9700645 operates from -40°C to 105°C. Amphenol substitutes extend this range to -65°C to 125°C (BERGSTIK® II) or -65°C to 130°C (BERGSTIK®). Extended temperature capability provides design margin for applications in extreme environments but is not required for standard commercial temperature applications. Select based on actual application requirements.

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