M50-3203545 Equivalent & Substitute Parts

Part Overview

The M50-3203545 is a 70-position receptacle connector manufactured by Harwin Inc. in the Archer M50 series. This connector features 0.050" (1.27mm) pitch, through-hole right-angle mounting, and gold-plated contacts rated for 1A current. The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing system support, maintenance, and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	M50-3203545
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Series	Archer M50
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	70
Pitch - Mating	0.050" (1.27mm)
Number of Rows	2
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Current Rating	1A
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the M50-3203545 is determined by the following critical parameters:

Connector Type & Contact Type: Receptacle with female socket contacts
Number of Positions: 70 positions
Pitch - Mating: 0.050" (1.27mm)
Number of Rows: 2 rows
Row Spacing - Mating: 0.050" (1.27mm)
Mounting Type: Through hole, right angle
Termination: Solder
Fastening Type: Push-pull
Contact Finish - Mating: Gold
Current Rating: 1A
Operating Temperature Range: -40°C ~ 105°C
Material Flammability Rating: UL94 V-0
RoHS Compliance: ROHS3 Compliant

Two substitute parts meet these core substitution criteria:

M50-3202045 (Harwin Inc.) - Same manufacturer, same series, same electrical and mechanical specifications. Differs only in position count (40 vs. 70), making it suitable only for applications requiring 40 positions.

853-83-070-20-001101 (Preci-Dip) - Matches all critical parameters including 70-position count, 0.050" pitch, 2-row configuration, through-hole right-angle mounting, and push-pull fastening. Maintains gold contact finish, 1A current rating, and UL94 V-0 flammability rating.

Parameter Comparison

Parameter	M50-3203545 (Main)	M50-3202045 (Substitute)	853-83-070-20-001101 (Substitute)
Manufacturer	Harwin Inc.	Harwin Inc.	Preci-Dip
Connector Type	Receptacle	Receptacle	Socket
Contact Type	Female Socket	Female Socket	Female Socket
Number of Positions	70	40	70
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)	29.5µin (0.75µm)
Current Rating	1A	1A	1A
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

M50-3202045 is suitable as a substitute only for applications where the connector requirement can be reduced to 40 positions. This part maintains identical electrical and mechanical specifications to the main part within its position count and benefits from active product status with current manufacturer support.

853-83-070-20-001101 is the direct functional equivalent for 70-position applications. It maintains all critical electrical and mechanical parameters, including position count, pitch, row configuration, mounting style, and fastening mechanism. The Preci-Dip part offers an extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 105°C) and increased contact finish thickness (29.5µin versus 10.0µin), both of which provide enhanced performance margins. Both parts carry ROHS3 compliance and UL94 V-0 flammability certification, ensuring regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can M50-3202045 replace M50-3203545 in all applications?

A: No. M50-3202045 has 40 positions while M50-3203545 has 70 positions. Substitution is only possible if your application requires 40 or fewer positions. The electrical and mechanical specifications are otherwise identical.

Q: Is 853-83-070-20-001101 a direct replacement for M50-3203545?

A: Yes, for 70-position applications. Both connectors share identical position count, pitch (0.050"), row configuration (2 rows), mounting type (through-hole right angle), fastening mechanism (push-pull), and current rating (1A). Both are ROHS3 compliant and UL94 V-0 rated.

Q: What are the differences between M50-3203545 and 853-83-070-20-001101?

A: The primary differences are manufacturer (Harwin vs. Preci-Dip), contact material (phosphor bronze vs. beryllium copper), contact finish thickness on mating surface (10.0µin vs. 29.5µin), insulation material composition, and operating temperature range (-40°C to 105°C vs. -55°C to 125°C). All critical connector parameters remain equivalent.

Q: Does the higher contact finish thickness of 853-83-070-20-001101 affect compatibility?

A: No. The increased gold plating thickness (29.5µin vs. 10.0µin) on the Preci-Dip connector provides enhanced durability and wear resistance without affecting mating compatibility or electrical performance.

Q: Are both substitute parts currently available?

A: Yes. M50-3202045 and 853-83-070-20-001101 are both active products with current inventory available.

Q: What compliance certifications apply to these connectors?

A: All three connectors (main part and both substitutes) are ROHS3 compliant and carry UL94 V-0 material flammability ratings. All are classified as REACH Unaffected and carry EAR99 ECCN designation.

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