3M 3440-6002UG Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The 3M 3440-6002UG is a shrouded rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This connector features 30 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing and is terminated by solder. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Substiute Parts

3440-6002UG

3MIn Stock: 9343440-6002UG Datasheet

Current PartRFQ

N3440-6002RB

3MIn Stock: 1207N3440-6002RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3M N3440-6002RB serves as a direct substitute for the 3440-6002UG based on the following critical parameters:

• Identical connector type, contact type, and position configuration (30-position, 2-row header)
• Matching pitch specifications (0.100" mating pitch and row spacing)
• Identical mounting method (through-hole solder termination)
• Identical shrouding design (shrouded 4-wall configuration)
• Matching operating temperature range (-55°C ~ 105°C)
• Equivalent material flammability rating (UL94 V-0)
• Compatible contact geometry and overall dimensions

The N3440-6002RB is classified as an active product with improved compliance status, making it the recommended replacement for the obsolete 3440-6002UG.

Parameter Comparison

Engineering Selection Recommendations

The N3440-6002RB is the appropriate substitute for the obsolete 3440-6002UG based on the following factors:

The substitute part maintains full mechanical and electrical compatibility with identical connector geometry, pitch specifications, and contact configuration. The N3440-6002RB is an active product with current manufacturing support, ensuring long-term availability and supply chain continuity.

The substitute part achieves RoHS compliance, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic components in many markets and applications.

The current rating of the N3440-6002RB is 1.75A compared to 1A for the original part, providing increased current-carrying capacity within the same physical form factor. The contact finish on the post has been updated from Tin-Lead to Tin, reflecting modern manufacturing practices.

The insulation material composition differs between the two parts: the original uses Polybutylene Terephthalate (PBT), while the substitute uses Polycyclohexylenedimethylene Terephthalate (PCT). Both materials maintain the same UL94 V-0 flammability rating and are suitable for the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Are the 3440-6002UG and N3440-6002RB mechanically interchangeable?

A: Yes. Both connectors share identical pitch spacing (0.100"), row configuration (2 rows of 30 positions), contact geometry, and overall dimensions. The connectors are designed for the same through-hole mounting applications and will fit existing PCB layouts without modification.

Q: What is the difference in current rating between these parts?

A: The original 3440-6002UG is rated for 1A per contact, while the N3440-6002RB is rated for 1.75A per contact. The substitute part provides higher current-carrying capacity. Applications requiring only 1A operation are fully compatible with the substitute part.

Q: Does the change in contact finish affect compatibility?

A: The mating contact finish remains gold on both parts, ensuring consistent mating performance. The post finish has changed from Tin-Lead to Tin. Both finishes are suitable for solder termination and provide equivalent solderability and reliability in through-hole applications.

Q: Why is RoHS compliance important for this substitution?

A: The N3440-6002RB achieves RoHS compliance, eliminating restricted substances such as lead and cadmium. This compliance is required for many applications and markets, particularly in consumer electronics and regulated industries. The original part's non-compliance may restrict its use in new designs.

Q: Are there differences in insulation material between the parts?

A: The original part uses Polybutylene Terephthalate (PBT), while the substitute uses Polycyclohexylenedimethylene Terephthalate (PCT). Both materials are glass-filled polyester compounds with identical UL94 V-0 flammability ratings and compatible operating temperature ranges (-55°C ~ 105°C). The material change does not affect functional performance in standard applications.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These connectors can be stored and handled under standard conditions without special moisture control measures.

Q: Can the N3440-6002RB be used in existing designs originally specified for the 3440-6002UG?

A: Yes. The substitute part is fully compatible with existing designs. The improved current rating, RoHS compliance, and active product status make it suitable for direct replacement in new production runs and design revisions.