3M 3433-1003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3433-1003 is a right-angle rectangular connector header with 50 positions at 2.54mm pitch, designed for through-hole mounting with solder termination. This connector features shrouded 3-wall construction, male pin contacts with gold-plated mating surfaces, and operates across -55°C to 105°C. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Active alternatives from 3M and Amphenol ICC (FCI) provide direct functional replacement with enhanced compliance and availability.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	50
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Shrouding	Shrouded - 3 Wall
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

50-position, 2-row configuration at 0.100" (2.54mm) pitch
Through-hole, right-angle mounting with solder termination
Male pin contact type with gold-plated mating surface
Shrouded construction with keying slot and mounting flange
Operating temperature range -55°C to 105°C
UL94 V-0 flammability rating
1.75A current rating capability

Substitute parts are grouped into two categories based on mechanical compatibility:

Category A: 3M Direct Replacements - D3433-5002-AR and N3433-5002RB maintain identical electrical and mechanical specifications with enhanced shrouding (4-wall) and improved compliance status.

Category B: Amphenol ICC (FCI) Quickie™ Series - 65823-043, 65823-043LF, 65823-045, 65823-045LF, 65823-047, 65823-047LF, 65823-091LF, and 65823-093 provide functional equivalence with variations in contact post length and fastening mechanism. These parts share core mating characteristics but differ in board-to-cable/wire configuration and contact geometry.

Parameter Comparison

Parameter	3433-1003	D3433-5002-AR	N3433-5002RB	65823-043 / 043LF	65823-045 / 045LF	65823-047 / 047LF	65823-091LF	65823-093
Manufacturer	3M	3M	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	50	50	50	50	50	50	50	50
Number of Rows	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.155" (3.94mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.105" (2.67mm)	0.150" (3.81mm)	0.675" (17.15mm)	0.105" (2.67mm)	0.150" (3.81mm)
Insulation Height	0.310" (7.87mm)	0.340" (8.64mm)	0.340" (8.64mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)
Contact Shape	Square	Square	Square	Circular	Circular	Square	Circular	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	Not specified
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant (LF variants)	RoHS Compliant (LF variants)	RoHS Compliant (LF variants)	RoHS Compliant	RoHS non-compliant

Engineering Selection Recommendations

For Direct 3M Replacement:

D3433-5002-AR and N3433-5002RB are the primary alternatives to 3433-1003. Both maintain the 50-position, 2.54mm pitch configuration with identical mating characteristics. D3433-5002-AR carries ROHS3 compliance and is packaged in trays, while N3433-5002RB is RoHS compliant and supplied in bulk. Both feature enhanced 4-wall shrouding compared to the original 3-wall design, providing improved mechanical protection. These parts are recommended for applications requiring minimal design modification and maximum compatibility with existing tooling.

For Amphenol ICC (FCI) Quickie™ Series Selection:

The Amphenol ICC alternatives provide functional equivalence with active product status and established supply chains. Selection within this family depends on contact post length requirements and fastening mechanism:

65823-043 and 65823-043LF: 0.105" post length, push-pull fastening, circular contacts
65823-045 and 65823-045LF: 0.150" post length, push-pull fastening, circular contacts
65823-047 and 65823-047LF: 0.675" post length, push-pull fastening, square contacts
65823-091LF: 0.105" post length, latch lock/eject hooks, circular contacts
65823-093: 0.150" post length, latch lock/eject hooks, circular contacts

The LF suffix variants (65823-043LF, 65823-045LF, 65823-047LF, 65823-091LF) are RoHS compliant and REACH affected. Non-LF variants (65823-043, 65823-045, 65823-047, 65823-093) are RoHS non-compliant. Selection of LF variants is required for applications subject to RoHS or REACH regulations.

Compliance Considerations:

For new designs or applications with regulatory requirements, D3433-5002-AR (ROHS3) or N3433-5002RB (RoHS) from 3M, or the LF-suffixed Amphenol ICC variants, are required. The original 3433-1003 and non-LF Amphenol alternatives are suitable only for legacy systems without compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can 3433-1003 be directly replaced with D3433-5002-AR or N3433-5002RB?

A: Yes. Both 3M alternatives maintain the 50-position, 2.54mm pitch, through-hole right-angle configuration with identical mating contact specifications. The primary differences are enhanced 4-wall shrouding (versus 3-wall on the original) and improved compliance status. No circuit redesign is required.

Q: What is the difference between 3M and Amphenol ICC alternatives?

A: 3M alternatives (D3433-5002-AR, N3433-5002RB) are direct form-fit-function replacements with identical contact geometry and post lengths. Amphenol ICC Quickie™ series parts offer functional equivalence but with variations in contact post length (0.105" to 0.675"), contact shape (circular or square), and fastening mechanism (push-pull or latch lock). These differences may require PCB layout verification.

Q: What does the "LF" suffix mean on Amphenol ICC parts?

A: The LF suffix indicates lead-free construction and RoHS compliance. Parts without the LF suffix (65823-043, 65823-045, 65823-047, 65823-093) are RoHS non-compliant. For applications subject to RoHS or REACH regulations, LF-suffixed variants must be selected.

Q: Are there operating temperature differences between substitutes?

A: The original 3433-1003 and 3M alternatives (D3433-5002-AR, N3433-5002RB) are rated for -55°C to 105°C. Amphenol ICC Quickie™ series parts do not specify an operating temperature range in the provided data. Verify temperature requirements with the connector manufacturer if operating outside standard industrial ranges.

Q: How do contact post lengths affect PCB design?

A: Contact post length determines solder joint depth and PCB hole requirements. The original 3433-1003 has 0.155" posts. 3M alternatives have 0.112" posts. Amphenol ICC variants range from 0.105" to 0.675". Shorter posts (0.105"-0.150") are suitable for standard PCB thicknesses. The 0.675" variant (65823-047, 65823-047LF) is designed for thicker assemblies or cable applications. Verify PCB hole depth compatibility before substitution.

Q: What is the difference between push-pull and latch lock fastening?

A: Push-pull fastening (65823-043, 65823-045, 65823-047 series) uses simple insertion and removal. Latch lock/eject hooks (65823-091LF, 65823-093) provide mechanical retention with ejector mechanisms for controlled disconnection. Selection depends on application requirements for mated connector security and serviceability.

Q: Can circular contact Amphenol parts replace square contact 3M parts?

A: Circular and square contacts have different mating geometries and are not interchangeable. Verify contact shape compatibility with the mating connector before substitution. The original 3433-1003 uses square contacts; D3433-5002-AR and N3433-5002RB also use square contacts. Amphenol ICC 65823-043, 65823-045, and 65823-091LF use circular contacts; 65823-047, 65823-047LF, and 65823-093 use square contacts.

Q: What packaging options are available?

A: 3M D3433-5002-AR is supplied in trays. N3433-5002RB is supplied in bulk. Amphenol ICC variants are supplied in bulk (65823-043, 65823-045, 65823-047, 65823-093) or trays (65823-043LF, 65823-045LF, 65823-047LF, 65823-091LF). Packaging selection affects handling, storage, and automated assembly compatibility.

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