M20-9954045 Equivalent & Substitute Parts

Part Overview

The M20-9954045 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board or cable applications. This connector features 80 positions across 2 rows with 0.100" (2.54mm) pitch spacing and is rated for 3A per contact at operating temperatures from -40°C to 105°C. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9954045
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Number of Positions	80
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Contact Type	Male Pin
Contact Finish - Mating	Gold
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the M20-9954045 is determined by the following critical parameters that must remain consistent:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 80
Number of Rows: 2
Row Spacing - 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

The following substitute parts meet these core electrical and mechanical requirements:

M20-9953645 (Harwin Inc.) - Active status alternative with 72 positions instead of 80. Maintains identical pitch, row spacing, mounting configuration, and electrical ratings. Suitable where position count reduction is acceptable.

PREC040DBAN-M71RC (Sullins Connector Solutions) - Active status equivalent with full 80-position configuration. Maintains pitch, row spacing, mounting type, and current rating. Contact finish differs (tin vs. gold mating surface).

PREC040DBBN-M71RC (Sullins Connector Solutions) - Active status equivalent with full 80-position configuration. Maintains pitch, row spacing, mounting type, and current rating. Extended post length (0.220" vs. 0.118") and tin contact finish.

PRPC040DBBN-M71RC (Sullins Connector Solutions) - Active status equivalent with full 80-position configuration. Maintains pitch, row spacing, mounting type, and current rating. Extended post length (0.220" vs. 0.118") with gold flash contact finish.

Parameter Comparison

Parameter	M20-9954045	M20-9953645	PREC040DBAN-M71RC	PREC040DBBN-M71RC	PRPC040DBBN-M71RC
Manufacturer	Harwin Inc.	Harwin Inc.	Sullins Connector Solutions	Sullins Connector Solutions	Sullins Connector Solutions
Product Status	Obsolete	Active	Active	Active	Active
Number of Positions	80	72	80	80	80
Number of Rows	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)
Row Spacing - Mating	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
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.120" (3.05mm)	0.220" (5.58mm)	0.220" (5.58mm)
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)
Contact Finish - Mating	Gold	Gold	Tin	Tin	Gold
Contact Material	Brass	Brass	Brass	Brass	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Current Rating	3A per Contact	3A per Contact	3A	3A	3A per Contact
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Connector Type	Header, Cuttable	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header, Breakaway

Engineering Selection Recommendations

For direct replacement of the M20-9954045 in active production designs, PRPC040DBBN-M71RC is the primary recommendation. This part maintains full 80-position configuration, gold contact finish matching the original specification, and active product status ensuring long-term availability. The extended post length (0.220" vs. 0.118") requires PCB layout verification but provides improved mechanical stability in through-hole applications.

PREC040DBAN-M71RC serves as an alternative where tin contact finish is acceptable. This part maintains the original contact length specifications more closely and is suitable for applications where gold plating is not a critical requirement.

PREC040DBBN-M71RC offers identical electrical and mechanical performance to PREC040DBAN-M71RC with extended post length, providing design flexibility for varying PCB thicknesses.

M20-9953645 is suitable only where design modifications to accommodate 72 positions instead of 80 are feasible. This part maintains Harwin manufacturing continuity and identical insulation material composition.

All substitute parts maintain compliance with ROHS3, UL94 V-0 flammability rating, and operating temperature specifications. Selection should prioritize contact finish compatibility with mating connector specifications and PCB layout constraints related to post length variations.

Frequently Asked Questions (FAQ)

Q: Can M20-9953645 be used as a direct replacement for M20-9954045?

A: M20-9953645 is electrically and mechanically compatible but provides only 72 positions instead of 80. Use this part only if design modifications to reduce position count are acceptable. All other critical parameters including pitch, row spacing, mounting type, and current rating remain identical.

Q: What is the primary difference between PREC040DBAN-M71RC and PREC040DBBN-M71RC?

A: Both parts are identical except for contact post length. PREC040DBAN-M71RC has 0.120" (3.05mm) post length, while PREC040DBBN-M71RC has 0.220" (5.58mm) post length. Selection depends on PCB thickness and mechanical requirements. Both use tin contact finish.

Q: Why does PRPC040DBBN-M71RC have a higher cost than PREC040DBBN-M71RC?

A: PRPC040DBBN-M71RC features gold flash contact finish on both mating and post surfaces, compared to tin finish on PREC040DBBN-M71RC. Gold plating provides superior corrosion resistance and is specified where contact reliability in harsh environments is required.

Q: Are the Sullins Connector Solutions parts (PREC and PRPC series) fully compatible with the original Harwin M20 series?

A: Yes. All substitute parts maintain identical pitch (0.100"), row spacing (0.100"), 80-position configuration, mounting type (through-hole right-angle), current rating (3A), operating temperature range (-40°C to 105°C), and flammability rating (UL94 V-0). Minor variations in contact length and insulation material do not affect functional compatibility.

Q: What is the difference between cuttable and breakaway connector types?

A: Cuttable connectors (M20-9954045, M20-9953645) allow individual positions to be separated by cutting. Breakaway connectors (PREC and PRPC series) feature perforated sections for position separation. Both types are mechanically and electrically equivalent for board-to-board applications.

Q: Should I select gold or tin contact finish for new designs?

A: Gold contact finish (M20-9954045, PRPC040DBBN-M71RC) provides superior corrosion resistance and is recommended for applications with extended shelf life, high humidity environments, or critical signal integrity requirements. Tin contact finish (PREC040DBAN-M71RC, PREC040DBBN-M71RC) is suitable for standard industrial applications with normal environmental conditions.

Q: How do insulation material differences affect part selection?

A: M20-9954045 and M20-9953645 use Polyamide (PA6T) Nylon 6T insulation, while Sullins parts use Polybutylene Terephthalate (PBT). Both materials meet UL94 V-0 flammability requirements and operate across the specified temperature range. Material selection does not affect electrical performance or compatibility.

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