3M 3372-6203 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The 3M 3372-6203 is a vertical through-hole rectangular connector header with 60 positions at 2.54mm pitch. This connector features a shrouded 4-wall design with male pins, gold-plated mating contacts, and tin-lead plated posts. The part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. Active equivalent models from 3M and HARTING provide direct functional replacements with improved compliance status and enhanced specifications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	60
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead or Tin
Operating Temperature Range	-55°C to 105°C (main part); -55°C to 125°C (substitutes)
Material Flammability Rating	UL94 V-0
Current Rating	1A (main part); 1.75A (N3372-6002RB)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Connector type: Header
Contact type: Male Pin
Number of positions: 60
Number of rows: 2
Pitch - mating: 0.100" (2.54mm)
Row spacing - mating: 0.100" (2.54mm)
Mounting type: Through Hole
Shrouding: Shrouded - 4 Wall
Termination: Solder
Contact finish - mating: Gold
Material flammability rating: UL94 V-0

Allowable Variations:

Contact length parameters (mating and post) may vary within mechanical compatibility limits
Insulation height may vary within board layout constraints
Fastening type may differ (Push-Pull, Latch Lock/Eject Hooks Short, Latch Lock/Eject Hooks Long)
Insulation material composition may vary (PBT or PCT, glass-filled polyester)
Insulation color may differ (Black or Gray)
Contact finish - post may be Tin or Tin-Lead
Operating temperature upper limit may extend to 125°C
Current rating may increase
RoHS and ROHS3 compliance status may improve

Non-Substitutable Variations:

Right-angle mounting (09185607323) is excluded due to different mounting orientation
Variations in number of positions, rows, or pitch
Changes to connector type or contact type

Parameter Comparison

Parameter	3372-6203	N3372-6002RB	09185605912	09185605914	09185606902	09185606904	09185606912	09185606914	09185607912	09185607914
Manufacturer	3M	3M	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Series	3000	3000	SEK	SEK	SEK	SEK	SEK	SEK	SEK	SEK
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	60	60	60	60	60	60	60	60	60	60
Number of Rows	2	2	2	2	2	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)	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)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.228" (5.80mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.228" (5.80mm)	0.228" (5.80mm)	0.228" (5.80mm)	0.228" (5.80mm)	0.228" (5.80mm)
Contact Length - Post	0.155" (3.94mm)	0.112" (2.84mm)	0.177" (4.50mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)
Overall Contact Length	0.695" (17.65mm)	0.652" (16.56mm)	0.713" (18.10mm)	0.650" (16.51mm)	0.713" (18.10mm)	0.650" (16.51mm)	0.713" (18.10mm)	0.650" (16.51mm)	0.713" (18.10mm)	0.650" (16.51mm)
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Insulation Material	PBT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled
Insulation Color	Black	Black	Gray	Gray	Gray	Gray	Gray	Gray	Gray	Gray
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°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	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating	1A	1.75A	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: N3372-6002RB (3M)

The N3372-6002RB is the direct 3M equivalent with active product status. It maintains the same 60-position, 2-row configuration at 2.54mm pitch with identical mounting and shrouding specifications. This part achieves RoHS compliance and provides increased current rating of 1.75A compared to the original 1A specification. The Push-Pull fastening mechanism differs from the original Latch Lock design but remains functionally compatible for board-to-board applications. Operating temperature range remains -55°C to 105°C, matching the original specification.

Secondary Recommendations: HARTING SEK Series (09185605912, 09185605914, 09185606902, 09185606904, 09185606912, 09185606914, 09185607912, 09185607914)

The HARTING SEK series provides active alternatives with ROHS3 compliance and extended operating temperature range to 125°C. These parts maintain all critical electrical and mechanical parameters. Selection within this series depends on specific contact length and fastening type requirements:

Parts with 0.177" (4.50mm) post length: 09185605912, 09185606902, 09185606912, 09185607912
Parts with 0.114" (2.90mm) post length: 09185605914, 09185606904, 09185606914, 09185607914
Parts with Latch Lock/Eject Hooks Short fastening: 09185605912, 09185605914, 09185606912, 09185606914, 09185607912, 09185607914
Parts with Latch Lock/Eject Hooks Long fastening: 09185606902, 09185606904

All HARTING substitutes feature gray insulation versus the original black, and use tin-plated posts instead of tin-lead. These changes do not affect electrical performance or mechanical compatibility.

Exclusion: 09185607323 (HARTING Right-Angle)

The 09185607323 is excluded from substitution due to right-angle mounting orientation, which differs fundamentally from the vertical through-hole configuration of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use N3372-6002RB as a direct replacement for 3372-6203?

A: Yes. The N3372-6002RB maintains identical connector type, contact configuration, pitch, and mounting specifications. The primary differences are improved RoHS compliance, higher current rating (1.75A vs 1A), and Push-Pull fastening instead of Latch Lock. These changes do not affect mechanical or electrical compatibility in standard board-to-board applications.

Q: What is the difference between the HARTING parts with different post lengths?

A: Post length determines the overall contact length and affects board thickness compatibility. Parts with 0.177" (4.50mm) post length provide overall contact length of 0.713" (18.10mm), suitable for thicker PCBs. Parts with 0.114" (2.90mm) post length provide overall contact length of 0.650" (16.51mm), suitable for standard PCB thicknesses. Select based on your specific board thickness requirements.

Q: Are the HARTING SEK series parts compatible with the original 3M connector?

A: Yes. All HARTING SEK series parts maintain the critical parameters: 60 positions, 2 rows, 2.54mm pitch, shrouded 4-wall design, through-hole mounting, and solder termination. The extended operating temperature range to 125°C and ROHS3 compliance provide enhanced specifications. Insulation color difference (gray vs black) and tin post finish (vs tin-lead) do not affect functional compatibility.

Q: Why is the right-angle connector 09185607323 not a substitute?

A: The 09185607323 features right-angle through-hole mounting, which changes the connector orientation from vertical to horizontal. This fundamental difference in mounting geometry makes it unsuitable as a direct replacement for the vertical 3372-6203 configuration.

Q: What compliance improvements do the substitute parts offer?

A: The original 3372-6203 is RoHS non-compliant. The N3372-6002RB achieves RoHS compliance. All HARTING SEK series parts achieve ROHS3 compliance, representing the highest regulatory standard. All substitute parts maintain REACH Unaffected status and UL94 V-0 flammability rating.

Q: Can I mix fastening types in my design?

A: Fastening type selection depends on your specific application requirements. Latch Lock/Eject Hooks (Short or Long) provide mechanical retention through hook engagement. Push-Pull fastening (N3372-6002RB) provides alternative retention through push-pull action. Select based on your connector mating/unmating frequency and mechanical retention requirements. Do not mix fastening types within a single connector pair.

Q: Are there inventory considerations for these substitutes?

A: All substitute parts are listed as active with current inventory availability ranging from 680 to 1174 pieces. The original 3372-6203 shows 1107 pieces in stock but is classified as obsolete, indicating no future production. For new designs, select from active substitute parts to ensure long-term supply continuity.

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