3440-5502UG Equivalent & Substitute Parts

Part Overview

The 3440-5502UG is a rectangular connector header manufactured by 3M, designed for through-hole, right-angle board-to-cable/wire applications. This 30-position connector operates across -55°C to 105°C and features shrouded 4-wall construction with solder termination. The part is currently obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	30
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
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
Insulation Material	PCT, Polyester, Glass Filled
Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the 3440-5502UG is determined by strict equivalence across the following critical parameters:

Connector geometry: 30-position, 2-row configuration with 0.100" (2.54mm) pitch and row spacing
Mounting orientation: Through-hole, right-angle mounting
Shrouding design: Shrouded 4-wall construction
Termination method: Solder termination
Electrical performance: Operating temperature range of -55°C to 105°C
Contact material and finish: Copper alloy with gold mating surface and tin-based post finish
Insulation specification: PCT polyester glass-filled material with UL94 V-0 rating

The N3440-5002RB meets all these core requirements while offering improved electrical performance and active product status.

Parameter Comparison

Parameter	3440-5502UG (Main Part)	N3440-5002RB (Substitute)
Manufacturer	3M	3M
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	30	30
Number of Rows	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)
Insulation Height	0.340" (8.64mm)	0.340" (8.64mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin
Contact Material	Copper Alloy	Copper Alloy
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Current Rating (Amps)	1A	1.75A
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull
Contact Finish Thickness - Mating	15.0µin (0.38µm)	30.0µin (0.76µm)

Engineering Selection Recommendations

The N3440-5002RB is the direct active equivalent for the obsolete 3440-5502UG. Both connectors share identical mechanical and electrical specifications across all critical parameters including pitch, position count, mounting orientation, and operating temperature range.

The N3440-5002RB offers the following advantages:

Active product status: Currently manufactured and supported by 3M, ensuring long-term availability and supply chain continuity
RoHS compliance: Meets RoHS requirements, suitable for applications with environmental and regulatory compliance mandates
Enhanced electrical performance: Rated for 1.75A versus 1A, providing increased current capacity within the same form factor
Improved contact durability: Gold mating surface finish thickness doubled to 30.0µin, enhancing contact reliability and longevity
Modern fastening design: Push-Pull fastening mechanism replaces the original Latch Lock/Eject Hooks configuration

The contact finish post material differs (Tin versus Tin-Lead), reflecting modern manufacturing standards and RoHS compliance requirements. This change does not affect mechanical or electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Are the 3440-5502UG and N3440-5002RB mechanically interchangeable?

A: Yes. Both connectors feature identical 30-position, 2-row configurations with 0.100" (2.54mm) pitch, through-hole right-angle mounting, and shrouded 4-wall construction. PCB footprints and mating interface dimensions are equivalent.

Q: What is the difference in fastening mechanisms between these parts?

A: The 3440-5502UG uses Latch Lock/Eject Hooks (Short), while the N3440-5002RB uses Push-Pull fastening. Both mechanisms provide secure mating and are functionally equivalent for board-to-cable/wire applications. The fastening type does not affect electrical performance or mechanical fit.

Q: Can the N3440-5002RB handle the same current as the 3440-5502UG?

A: The N3440-5002RB is rated for 1.75A compared to the original 1A rating. This higher current capacity is fully backward compatible and does not introduce any compatibility issues for applications designed for the original 1A specification.

Q: Why is the contact finish thickness different?

A: The N3440-5002RB features a thicker gold mating surface finish (30.0µin versus 15.0µin), which improves contact durability and signal integrity. The post finish material changed from Tin-Lead to Tin to comply with RoHS requirements. These changes enhance reliability without affecting mechanical or electrical compatibility.

Q: Is the N3440-5002RB suitable for new designs?

A: Yes. The N3440-5002RB is an active product with RoHS compliance, making it the appropriate choice for new designs and applications requiring environmental regulation adherence.

Q: What is the inventory status of these parts?

A: The 3440-5502UG (obsolete) has 940 pieces in stock. The N3440-5002RB (active) has 1212 pieces in stock, providing better long-term availability assurance.

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