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

Part Overview

The 3M 3314-6303-UG is a shrouded vertical rectangular connector header with 14 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This through-hole solder-terminated component features male pins with gold-plated mating contacts and tin-lead post finish. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
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)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3314-6303-UG is determined by strict equivalence across the following critical parameters:

Connector type (Header), contact type (Male Pin), and position count (14 positions in 2 rows)
Mating pitch (0.100" / 2.54mm) and row spacing (0.100" / 2.54mm)
Shrouding configuration (Shrouded - 4 Wall) and mounting method (Through Hole)
Termination type (Solder) and operating temperature range (-55°C ~ 105°C)
Flammability rating (UL94 V-0) and moisture sensitivity level (1)

Substitute parts are grouped into two categories based on fastening type variation:

Category A: Latch Lock/Eject Hooks, Long Fastening — Direct functional equivalents with identical contact length specifications (0.240" mating, 0.155" post).

Category B: Push-Pull Fastening — Functionally compatible substitutes with different fastening mechanism and slightly shorter post length (0.112" post).

Parameter Comparison

Part Number	Manufacturer	Product Status	Fastening Type	Contact Length - Post	Current Rating	Contact Finish - Post	Insulation Material	RoHS Status
3314-6303-UG	3M	Obsolete	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1A	Tin-Lead	PBT, Polyester, Glass Filled	RoHS non-compliant
N3314-6303RB	3M	Active	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1.75A	Tin	PCT, Polyester, Glass Filled	RoHS Compliant
3314-6002	3M	Obsolete	Push-Pull	0.112" (2.84mm)	1A	Tin-Lead	PBT, Polyester, Glass Filled	RoHS non-compliant
N3314-6002RB	3M	Active	Push-Pull	0.112" (2.84mm)	1.75A	Tin	PCT, Polyester, Glass Filled	RoHS Compliant
102321-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1A per Contact	Tin-Lead	Not specified	Not applicable
2-5102321-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1A per Contact	Tin	Not specified	ROHS3 Compliant
5102321-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	1A per Contact	Tin	Not specified	RoHS Compliant
2-5499206-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1A	Tin	Not specified	ROHS3 Compliant
499206-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1A	Tin-Lead	Not specified	Not applicable
499922-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1A	Tin-Lead	Not specified	Not applicable
5499206-2	TE Connectivity AMP Connectors	Active	Latch Lock/Eject Hooks, Long	0.110" (2.79mm)	1A	Tin	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: N3314-6303RB

The N3314-6303RB is the direct active equivalent to the obsolete 3314-6303-UG. It maintains identical mechanical and electrical specifications including fastening type (Latch Lock/Eject Hooks, Long), contact post length (0.155"), and operating temperature range. The N3314-6303RB offers improved current rating (1.75A versus 1A), RoHS compliance, and uses tin post finish instead of tin-lead. This part is actively manufactured and stocked.

Secondary Recommendation: N3314-6002RB

The N3314-6002RB provides an active alternative with different fastening (Push-Pull instead of Latch Lock/Eject Hooks, Long) and shorter post length (0.112" versus 0.155"). This substitution requires mechanical redesign of the mating interface but offers the same RoHS compliance and improved current rating as the primary recommendation.

TE Connectivity AMP-Latch Series Options

The TE Connectivity 5102321-2 and 102321-2 are active alternatives with identical fastening type and post length to the original part. These parts operate across an extended temperature range (-65°C ~ 105°C) and carry RoHS or ROHS3 compliance. The 5102321-2 is preferred for new designs due to explicit RoHS compliance status.

Voltage Rating Consideration

TE Connectivity parts specify 250VAC voltage rating, whereas 3M parts do not provide voltage specification. This difference does not affect substitution eligibility for applications within the stated current and temperature parameters.

Frequently Asked Questions (FAQ)

Q: Can N3314-6303RB be used as a direct drop-in replacement for 3314-6303-UG?

A: Yes. The N3314-6303RB maintains identical mechanical dimensions, fastening type, contact post length, and electrical ratings. The primary differences are improved current capacity (1.75A versus 1A), RoHS compliance, and tin post finish instead of tin-lead. No PCB redesign is required.

Q: What is the difference between the Latch Lock/Eject Hooks and Push-Pull fastening types?

A: Latch Lock/Eject Hooks provide positive mechanical engagement with spring-loaded latches for secure mating. Push-Pull fastening uses a different engagement mechanism. These are not interchangeable without modifying the mating connector interface.

Q: Are TE Connectivity AMP-Latch parts compatible with 3M 3000 series connectors?

A: TE Connectivity 102321-2, 5102321-2, and related AMP-Latch parts are mechanically and electrically compatible with 3M parts meeting the specified pitch (0.100"), position count (14), and fastening type (Latch Lock/Eject Hooks, Long). Mating interface compatibility must be confirmed for specific applications.

Q: What does RoHS compliance mean for this connector?

A: RoHS compliance indicates the part does not contain restricted substances (lead, cadmium, mercury, hexavalent chromium, PBBs, PBDEs) above specified thresholds. RoHS-compliant parts use tin post finish instead of tin-lead. This affects soldering process parameters and material compatibility in some applications.

Q: Why do some substitute parts have different post lengths?

A: Post length variation (0.155", 0.112", 0.110") reflects different connector series designs. Shorter post lengths may affect PCB stack-up and mating depth. Verify post length compatibility with your PCB design and mating connector before substitution.

Q: Can I use 3314-6002 or N3314-6002RB as substitutes?

A: These parts are functionally compatible but require mechanical redesign. They use Push-Pull fastening instead of Latch Lock/Eject Hooks, Long, and have shorter post length (0.112" versus 0.155"). Use only if your mating connector supports Push-Pull fastening and your PCB design accommodates the shorter post.

Q: What is the difference between 5102321-2 and 2-5102321-2?

A: Both are TE Connectivity AMP-Latch parts with identical electrical and mechanical specifications. The "2-" prefix indicates a different packaging or distribution variant. Electrical and mechanical compatibility is equivalent.

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