M20-9753446 Equivalent & Substitute Parts

Part Overview

The M20-9753446 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle mounting applications. This 34-position connector operates at 0.100" (2.54mm) pitch and supports 3A per contact with an operating temperature range of -40°C to 105°C. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	M20-9753446
Manufacturer	Harwin Inc.
Number of Positions	34
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Contact Type	Male Pin
Termination	Solder
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

Substitution eligibility is determined by the following critical parameters:

Number of Positions: Must be 34 positions to maintain PCB layout compatibility
Pitch - Mating: Must be 0.100" (2.54mm) for connector interface compatibility
Mounting Type: Must be through-hole, right-angle to match mechanical installation requirements
Contact Type: Must be male pin for mating interface compatibility
Termination: Must be solder for PCB assembly compatibility
Material Flammability Rating: Must meet UL94 V-0 for safety compliance
RoHS Status: ROHS3 compliance preferred for regulatory alignment

Substitute parts are grouped into two categories:

Category A - Direct Position Match (34 positions): Parts maintaining identical position count with equivalent electrical and mechanical characteristics.

Category B - Position Variance (36 positions): Parts with increased position count that may require PCB layout modification but maintain core connector interface standards.

Parameter Comparison

Parameter	M20-9753446	69191-634H	HTSW-134-08-S-S-RA	HTSW-134-09-G-S-RA	HTSW-134-22-T-S-RA	PREC034SBAN-M71RC	M20-9753646
Manufacturer	Harwin Inc.	Amphenol ICC (FCI)	Samtec Inc.	Samtec Inc.	Samtec Inc.	Sullins Connector Solutions	Harwin Inc.
Number of Positions	34	34	34	34	34	34	36
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)
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
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder
Contact Length - Mating	0.228" (5.80mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.228" (5.80mm)
Contact Length - Post	0.118" (3.00mm)	0.120" (3.05mm)	0.090" (2.29mm)	0.290" (7.37mm)	0.190" (4.83mm)	0.120" (3.05mm)	0.118" (3.00mm)
Insulation Height	0.100" (2.54mm)	0.095" (2.41mm)	0.122" (3.10mm)	0.122" (3.10mm)	0.122" (3.10mm)	0.098" (2.50mm)	0.100" (2.54mm)
Contact Material	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Brass
Contact Finish - Mating	Tin	Gold or Gold, GXT™	Gold	Gold	Tin	Tin	Tin
Operating Temperature	-40°C ~ 105°C	Not Specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°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
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (34-Position, Direct Replacement):

PREC034SBAN-M71RC (Sullins Connector Solutions) and M20-9753446 (Harwin Inc.) are the closest functional equivalents. Both maintain 34 positions, 0.100" pitch, brass contact material with tin finish, and identical operating temperature range (-40°C to 105°C). Both are ROHS3 compliant and UL94 V-0 rated. PREC034SBAN-M71RC offers active product status with equivalent electrical and mechanical characteristics.

HTSW-134-22-T-S-RA (Samtec Inc.) provides an active alternative with tin-finished contacts and extended operating temperature capability (-55°C to 105°C). This part maintains all critical substitution parameters while offering enhanced thermal performance.

Secondary Substitutes (34-Position, Variant Characteristics):

69191-634H (Amphenol ICC) matches the 34-position requirement and mounting configuration but carries RoHS non-compliance status and uses phosphor bronze contacts with gold finish. This part is suitable only for applications where RoHS compliance is not mandated.

HTSW-134-08-S-S-RA and HTSW-134-09-G-S-RA (Samtec Inc.) both provide 34-position configurations with extended temperature range (-55°C to 125°C) and gold-finished contacts. These variants differ in contact post length and are suitable for applications requiring enhanced thermal performance and gold plating specifications.

Alternative (36-Position):

M20-9753646 (Harwin Inc.) offers 36 positions instead of 34, requiring PCB layout modification. This part maintains manufacturer continuity and ROHS3 compliance but is not a direct drop-in replacement.

Frequently Asked Questions (FAQ)

Q: Can I use a 36-position connector (M20-9753646) as a substitute for the 34-position M20-9753446?

A: M20-9753646 is not a direct replacement due to the 2-position difference. PCB layout modification is required to accommodate the additional positions. Use only if design flexibility permits layout changes.

Q: What is the primary difference between tin-finished and gold-finished contacts?

A: Tin-finished contacts (M20-9753446, PREC034SBAN-M71RC, HTSW-134-22-T-S-RA) provide cost-effective performance for standard applications. Gold-finished contacts (69191-634H, HTSW-134-08-S-S-RA, HTSW-134-09-G-S-RA) offer enhanced corrosion resistance and are specified for high-reliability or harsh-environment applications.

Q: Does RoHS compliance matter for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other markets. All recommended substitutes except 69191-634H are ROHS3 compliant. Verify regulatory requirements for your end application.

Q: What is the significance of contact post length variations?

A: Contact post length determines PCB pad depth and solder joint geometry. Variations between 0.090" and 0.290" require PCB design verification to ensure adequate solder coverage and mechanical strength. Consult PCB layout specifications before selecting variants with non-standard post lengths.

Q: Can I substitute a part with a higher operating temperature range?

A: Yes. Parts rated for -55°C to 125°C (Samtec HTSW variants) are suitable for applications requiring only -40°C to 105°C operation. The higher rating provides design margin without functional compromise.

Q: Is the kinked pin termination on 69191-634H compatible with standard PCB assembly?

A: Kinked pin termination requires specific PCB hole geometry and assembly procedures. Verify PCB design compatibility before selecting this variant.

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