3M 3433-5503UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3433-5503UG is a through-hole, right-angle rectangular connector header with 50 positions at 2.54mm pitch, designed for board-to-board or cable interconnection applications. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. Substitute parts must maintain electrical and mechanical compatibility across core connector specifications including pitch, position count, shrouding configuration, and termination method.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	50
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Shape	Square
Insulation Material	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester, Glass Filled
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 3433-5503UG is determined by strict equivalence across the following core parameters:

Connector pitch: 0.100" (2.54mm) mating pitch
Position configuration: 50 positions in 2-row arrangement
Row spacing: 0.100" (2.54mm)
Shrouding: 4-wall shrouded design
Mounting: Through-hole, right-angle orientation
Termination: Solder connection
Contact shape: Square profile
Insulation material: PCT polyester, glass-filled composition
Flammability: UL94 V-0 rating
Temperature range: -55°C to 105°C operation

The identified substitute parts D3433-5002-AR and N3433-5002RB meet all core electrical and mechanical compatibility requirements. Variations in contact material, contact finish specifications, fastening mechanism, and product status do not preclude functional substitution when these core parameters remain constant.

Parameter Comparison

Parameter	3433-5503UG (Main)	D3433-5002-AR	N3433-5002RB
Manufacturer	3M	3M	3M
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	50	50	50
Number of Rows	2	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder
Contact Shape	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Current Rating (Amps)	1A	1.75A	1.75A
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Push-Pull
Contact Material	Copper Alloy	Brass	Copper Alloy
Contact Finish - Post	Tin-Lead	Tin	Tin

Engineering Selection Recommendations

Both D3433-5002-AR and N3433-5002RB are active production alternatives to the obsolete 3433-5503UG. Selection between these substitutes is based on regulatory and compliance requirements:

D3433-5002-AR is designated ROHS3 compliant and packaged in trays, suitable for applications requiring enhanced environmental compliance documentation. This part operates at 1.75A current rating with 10.0µin gold plating on mating contacts.

N3433-5002RB is RoHS compliant with bulk packaging and operates at 1.75A current rating with 30.0µin gold plating on mating contacts. This part includes REACH unaffected status documentation and maintains copper alloy contact material consistent with the original 3433-5503UG design.

Both substitutes provide higher current capacity (1.75A versus 1A) and improved regulatory compliance compared to the obsolete main part. The choice between D3433-5002-AR and N3433-5002RB depends on specific procurement, packaging, and compliance documentation requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can D3433-5002-AR or N3433-5002RB be used as direct replacements for 3433-5503UG in existing PCB designs?

A: Yes. Both substitute parts maintain identical mating pitch (2.54mm), position count (50), row configuration (2 rows), shrouding (4-wall), mounting type (through-hole right-angle), and termination method (solder). PCB footprints designed for 3433-5503UG are compatible with both substitute parts.

Q: What is the difference in fastening mechanism between the main part and substitutes?

A: The 3433-5503UG uses latch lock/eject hooks with short configuration. Both D3433-5002-AR and N3433-5002RB employ push-pull fastening. This difference affects mating force and connector engagement but does not impact electrical or mechanical compatibility on the PCB side.

Q: Are there current rating implications when substituting to D3433-5002-AR or N3433-5002RB?

A: The substitute parts are rated for 1.75A per contact, compared to 1A for the original 3433-5503UG. This represents an increase in current capacity and does not create compatibility issues. Designs operating within the original 1A specification remain fully compatible.

Q: What packaging options are available for these substitute parts?

A: D3433-5002-AR is supplied in trays. N3433-5002RB is supplied in bulk packaging. Packaging selection should align with procurement volume and handling requirements for manufacturing operations.

Q: How do the RoHS compliance statuses differ among these parts?

A: The original 3433-5503UG is RoHS non-compliant. D3433-5002-AR is ROHS3 compliant. N3433-5002RB is RoHS compliant. Applications subject to RoHS directives should specify either substitute part to ensure regulatory compliance.

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