3M 3372-6303 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The 3M 3372-6303 is a through-hole rectangular connector header with 60 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component features shrouded 4-wall construction with solder termination and latch lock/eject hook fastening. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

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
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following critical parameters:

Connector configuration: 60 positions, 2 rows, 0.100" (2.54mm) pitch and row spacing
Mounting and termination: Through-hole solder termination
Shrouding: Shrouded 4-wall construction
Contact type: Male pin with gold mating surface
Operating temperature: Minimum -55°C to 105°C range
Flammability: UL94 V-0 rating
Current capacity: Minimum 1A per contact

All substitute parts listed meet these core electrical and mechanical requirements. Variations in contact post finish, insulation material, fastening mechanism (latch lock vs. push-pull), contact post length, and RoHS compliance status are secondary parameters that do not prevent functional substitution when the primary criteria are satisfied.

Parameter Comparison

Part Number	Manufacturer	Series	Positions	Pitch (mm)	Rows	Fastening Type	Contact Post Length	Current Rating (A)	Operating Temp (°C)	Contact Finish - Post	RoHS Status	Product Status
3372-6303	3M	3000	60	2.54	2	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1	-55 ~ 105	Tin-Lead	Non-compliant	Obsolete
N3372-6303RB	3M	3000	60	2.54	2	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1.75	-55 ~ 105	Tin	Compliant	Active
N3372-6002RB	3M	3000	60	2.54	2	Push-Pull	0.112" (2.84mm)	1.75	-55 ~ 105	Tin	Compliant	Active
1-499206-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1	-65 ~ 105	Tin-Lead	Non-compliant	Active
1-499922-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1	-65 ~ 105	Tin-Lead	Non-compliant	Active
1-5102321-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1	-65 ~ 105	Tin	Compliant	Active
1-5111490-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1	-65 ~ 105	Tin	Compliant	Active
1-5499206-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1	-65 ~ 105	Tin	ROHS3 Compliant	Active
1-5499922-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1	-65 ~ 105	Tin	ROHS3 Compliant	Active
1-5499923-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1	-65 ~ 105	Tin	Compliant	Active
3-5102321-1	TE Connectivity AMP Connectors	AMP-Latch	60	2.54	2	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1	-65 ~ 105	Tin	Compliant	Active

Engineering Selection Recommendations

Direct 3M Equivalent (Recommended for Pin-Compatible Replacement)

N3372-6303RB is the active production equivalent from 3M. It maintains identical mechanical dimensions, fastening mechanism (latch lock/eject hooks, long), and contact post length (0.155"). The primary differences are RoHS compliance and increased current rating (1.75A vs. 1A). This part provides the most direct substitution path with no PCB redesign required.

Alternative 3M Option (Fastening Mechanism Variation)

N3372-6002RB offers RoHS compliance and higher current rating but uses push-pull fastening instead of latch lock/eject hooks and has a shorter contact post (0.112" vs. 0.155"). This part requires mechanical compatibility verification with mating connectors.

TE Connectivity AMP-Latch Series (Cross-Manufacturer Substitutes)

The TE Connectivity parts (1-5102321-1, 1-5499923-1, 3-5102321-1, 1-5111490-1, 1-5499206-1, 1-5499922-1, 1-499922-1, and 1-499206-1) are functionally equivalent across the critical 60-position, 2.54mm pitch, shrouded 4-wall, through-hole solder configuration. These parts are active production items with RoHS compliance available in multiple variants. Contact post length variations (0.110" to 0.155") and contact finish differences (tin vs. tin-lead) are secondary parameters. TE Connectivity parts support extended operating temperature range (-65°C to 105°C vs. -55°C to 105°C).

Compliance Considerations

For new designs requiring RoHS compliance, N3372-6303RB (3M) or any TE Connectivity AMP-Latch variant with RoHS certification are appropriate. For legacy designs with RoHS non-compliant requirements, 1-499206-1 or 1-499922-1 maintain the original tin-lead post finish and non-compliant status.

Frequently Asked Questions (FAQ)

Q: Can N3372-6303RB directly replace 3372-6303 without PCB modification?

A: Yes. N3372-6303RB is mechanically and electrically compatible. It maintains identical pitch (2.54mm), position count (60), row configuration (2 rows), shrouding (4-wall), fastening type (latch lock/eject hooks, long), and contact post length (0.155"). The higher current rating (1.75A) and RoHS compliance are improvements that do not affect compatibility.

Q: What is the impact of contact post length variation between 0.110" and 0.155"?

A: Contact post length affects insertion depth into the mating connector. Parts with 0.110" posts (1-5111490-1, 1-5499206-1, 1-5499922-1, 1-499206-1, 1-499922-1) require mating connectors designed for shorter post engagement. Parts with 0.155" posts (N3372-6303RB, 1-5102321-1, 1-5499923-1, 3-5102321-1) match the original design. Verify mating connector specifications before substitution.

Q: Are TE Connectivity AMP-Latch parts suitable for designs originally specified with 3M 3000 series?

A: Yes, provided the mating connector is compatible with the AMP-Latch series. Both series meet the core requirements: 60 positions, 2.54mm pitch, 2-row configuration, shrouded 4-wall construction, through-hole solder termination, and latch fastening. Mechanical fit must be verified with the specific mating connector model.

Q: What is the difference between tin and tin-lead post finishes?

A: Tin-lead (original 3372-6303 and TE 1-499206-1, 1-499922-1) provides lower melting point solder joints. Tin finish (N3372-6303RB and most TE variants) is RoHS-compliant and requires higher reflow temperatures. Soldering process parameters must align with the post finish specification.

Q: Can N3372-6002RB be used as a substitute despite the push-pull fastening difference?

A: N3372-6002RB is mechanically compatible only if the mating connector supports push-pull fastening. The latch lock/eject hook mechanism of the original part is not present. Mating connector compatibility must be confirmed before substitution.

Q: Which substitute part offers the best compliance and availability?

A: 1-5102321-1 and 1-5499923-1 (TE Connectivity) offer RoHS compliance, active production status, and high inventory levels (1235 and 822 units respectively). Both maintain the 0.155" contact post length matching the original design. N3372-6303RB (3M) is the direct manufacturer equivalent with 1106 units in stock.

Q: Are there packaging differences between substitute parts?

A: Yes. Packaging varies between bulk, tray, and unspecified formats. Bulk packaging is suitable for high-volume assembly. Tray packaging provides organized component handling. Packaging selection should align with production workflow and component handling requirements but does not affect electrical or mechanical performance.

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