3M 3314-6303 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3314-6303 is a shrouded rectangular connector header for through-hole mounting with 14 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The connector features male pins with gold-plated mating contacts, tin-lead plated posts, and latch lock fastening with long eject hooks. Substitutes must maintain electrical compatibility, mechanical fit, and thermal performance within the specified operating range of -55°C to 105°C.

Key Parameters

Parameter	3314-6303 Specification
Connector Type	Header
Contact Type	Male Pin
Number of Positions	14
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
Fastening Type	Latch Lock/Eject Hooks, Long
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Current Rating	1A
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

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

Critical Parameters (Must Match):

Connector type: Header
Contact type: Male Pin
Number of positions: 14
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
Fastening type: Latch Lock/Eject Hooks, Long
Contact finish - mating: Gold
Material flammability rating: UL94 V-0

Allowable Variations:

Contact length - post: Acceptable range 0.110" to 0.155" (2.79mm to 3.94mm)
Contact finish - post: Tin-Lead or Tin
Insulation material: PBT or PCT variants
Current rating: 1A or higher
Operating temperature: -55°C minimum and 105°C maximum or broader range
RoHS status: Compliant or non-compliant (design-dependent)
Product status: Active or Obsolete

The following parts meet substitution criteria for the 3314-6303:

3M Series (Active Status):

N3314-6002RB (Push-Pull fastening variant)
N3314-6302RB (Latch Lock fastening, active status)

TE Connectivity AMP-Latch Series:

102321-2 (Latch Lock fastening)
2-5102321-2 (Latch Lock fastening, ROHS3 compliant)
2-5499206-2 (Latch Lock fastening, ROHS3 compliant)
499206-2 (Latch Lock fastening)
499922-2 (Latch Lock fastening)
5102321-2 (Latch Lock fastening, RoHS compliant)

On Shore Technology Inc. Series:

301-LS-141 (Latch Lock fastening, active status, enhanced current rating)

Parameter Comparison

Part Number	Manufacturer	Product Status	Positions	Pitch (mm)	Fastening Type	Contact Post Length (mm)	Contact Finish - Post	Current Rating (A)	Operating Temp (°C)	RoHS Status
3314-6303	3M	Obsolete	14 (2x7)	2.54	Latch Lock, Long	3.94	Tin-Lead	1	-55 to 105	Non-compliant
3314-6002	3M	Obsolete	14 (2x7)	2.54	Push-Pull	2.84	Tin-Lead	1	-55 to 105	Non-compliant
N3314-6002RB	3M	Active	14 (2x7)	2.54	Push-Pull	2.84	Tin	1.75	-55 to 105	Compliant
N3314-6302RB	3M	Active	14 (2x7)	2.54	Latch Lock, Long	2.84	Tin	1.75	-55 to 105	Compliant
102321-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	3.94	Tin-Lead	1	-65 to 105	Not applicable
2-5102321-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	3.94	Tin	1	-65 to 105	ROHS3 Compliant
2-5499206-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	2.79	Tin	1	-65 to 105	ROHS3 Compliant
499206-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	2.79	Tin-Lead	1	-65 to 105	Not applicable
499922-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	2.79	Tin-Lead	1	-65 to 105	Not applicable
5102321-2	TE Connectivity	Active	14 (2x7)	2.54	Latch Lock, Long	3.94	Tin	1	-65 to 105	RoHS Compliant
301-LS-141	On Shore Technology	Active	14 (2x7)	2.54	Latch Lock, Long	3.10	Not specified	2	-55 to 120	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: N3314-6302RB is the preferred substitute. This 3M part maintains the same base product family (N3314 series), preserves latch lock fastening with long eject hooks, and achieves active product status with RoHS compliance. The contact post length reduction from 3.94mm to 2.84mm is within allowable mechanical tolerance for standard PCB through-hole applications. Current rating increase to 1.75A provides design margin.

Alternative - TE Connectivity AMP-Latch Series: 5102321-2 or 2-5102321-2 provide equivalent mechanical and electrical performance with extended operating temperature range (-65°C to 105°C). These parts maintain the original 3.94mm contact post length, matching the 3314-6303 profile precisely. 5102321-2 carries RoHS compliance; 2-5102321-2 carries ROHS3 compliance. Both are active status components with established supply chains.

Alternative - Compact Profile: 2-5499206-2 or 499206-2 offer reduced overall contact length (2.79mm post) for space-constrained applications. These TE Connectivity parts maintain all critical electrical parameters and latch lock fastening. 2-5499206-2 includes ROHS3 compliance.

Alternative - Enhanced Current Capacity: 301-LS-141 from On Shore Technology provides 2A current rating with extended operating temperature to 120°C. This part is suitable for applications requiring higher current handling or broader thermal performance. ROHS3 compliance is included.

Fastening Type Variant: N3314-6002RB substitutes the latch lock fastening with push-pull fastening. This part is appropriate only if the mating connector uses push-pull engagement. Active status and RoHS compliance are provided.

Frequently Asked Questions (FAQ)

Q: Can N3314-6302RB directly replace 3314-6303 in existing designs? A: Yes. N3314-6302RB maintains identical connector type, position count, pitch, shrouding, and fastening mechanism. The contact post length is reduced from 3.94mm to 2.84mm, which is within standard PCB through-hole tolerance. Electrical performance is equivalent or superior (1.75A vs. 1A rating). No design modification is required.

Q: What is the difference between latch lock and push-pull fastening? A: Latch lock fastening uses mechanical hooks that engage with the mating connector and require deliberate disengagement. Push-pull fastening uses a sliding collar mechanism for engagement and disengagement. The 3314-6303 uses latch lock fastening. Substitutes must use the same fastening type unless the mating connector is also changed.

Q: Are TE Connectivity parts compatible with 3M connector housings? A: TE Connectivity AMP-Latch series parts are mechanically and electrically compatible with 3M 3000 series housings when pitch, position count, and fastening type match. Verify mating connector specifications before substitution.

Q: What does RoHS compliance mean for this connector? A: RoHS compliance indicates the part contains no lead, cadmium, hexavalent chromium, or other restricted substances. RoHS non-compliant parts (like the original 3314-6303) contain tin-lead solder on contact posts. RoHS-compliant variants use pure tin or other lead-free finishes. Selection depends on end-product regulatory requirements.

Q: Can I use a part with higher current rating as a substitute? A: Yes. Parts rated for 1.75A or 2A can substitute for the 1A-rated 3314-6303 without electrical degradation. Higher current rating provides design margin and does not affect compatibility with standard PCB traces or mating connectors.

Q: What is the significance of contact post length variation? A: Contact post length determines insertion depth into PCB through-holes. The original 3314-6303 has 3.94mm posts. Substitutes with 2.84mm or 2.79mm posts are acceptable for standard 1.6mm PCB thickness with typical solder joint formation. Verify PCB design if using parts with significantly different post lengths in high-reliability applications.

Q: Which substitute offers the broadest operating temperature range? A: 301-LS-141 from On Shore Technology provides -55°C to 120°C, compared to -55°C to 105°C for the original part. TE Connectivity AMP-Latch series parts extend the lower limit to -65°C while maintaining 105°C upper limit.

Q: Is packaging type (bulk vs. tray) relevant to electrical compatibility? A: No. Packaging affects logistics and handling only. Bulk and tray packaging contain identical components. Selection should be based on procurement quantity and storage requirements.

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