3M 3433-1302 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3433-1302 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 part operates across the -55°C to 105°C temperature range with a 1A current rating and features shrouded 3-wall construction with latch lock/eject fastening. The 3433-1302 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

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
Shrouding	Shrouded
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Contact Material	Copper Alloy or Brass
Insulation Material	PCT Polyester, Glass Filled

Substitute Part Grouping Explanation

Substitution eligibility for the 3433-1302 is determined by the following critical parameters:

Connector type, contact type, and gender (Header, Male Pin)
Position count and row configuration (50 positions, 2 rows)
Mating pitch and row spacing (0.100" / 2.54mm)
Mounting style (Through Hole, Right Angle)
Termination method (Solder)
Operating temperature range (-55°C ~ 105°C)
Flammability rating (UL94 V-0)

The substitute parts D3433-5002-AR and N3433-5002RB maintain these core electrical and mechanical parameters. Variations in shrouding design (3-wall vs. 4-wall), fastening mechanism (Latch Lock/Eject Hooks vs. Push-Pull), contact finish specifications, and current rating do not preclude substitution when the mating interface and functional requirements remain unchanged.

Parameter Comparison

Parameter	3433-1302	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
Number of Positions	50	50	50
Number of Rows	2	2	2
Pitch - Mating	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)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Long	Push-Pull	Push-Pull
Termination	Solder	Solder	Solder
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.112" (2.84mm)
Insulation Height	0.310" (7.87mm)	0.340" (8.64mm)	0.340" (8.64mm)
Contact Shape	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold
Contact Material	Copper Alloy	Brass	Copper Alloy
Insulation Material	PCT Polyester, Glass Filled	PCT Polyester, Glass Filled	PCT Polyester, Glass Filled
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating (Amps)	1A	1.75A	1.75A
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 3433-1302 is obsolete and no longer in active production. Both D3433-5002-AR and N3433-5002RB are active alternatives that maintain the core mating interface specifications required for connector compatibility.

D3433-5002-AR is ROHS3 compliant and packaged in trays, suitable for automated assembly environments. N3433-5002RB is RoHS compliant and supplied in bulk packaging, appropriate for manual assembly or high-volume procurement scenarios.

Both substitute parts feature improved current ratings (1.75A vs. 1A) and enhanced shrouding (4-wall vs. 3-wall construction), providing increased robustness. The fastening mechanism differs from the original (Push-Pull vs. Latch Lock/Eject Hooks), which may require mechanical accommodation in existing designs but does not affect electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can D3433-5002-AR or N3433-5002RB be used as direct replacements for the 3433-1302?

A: Yes. Both parts maintain identical mating pitch (0.100" / 2.54mm), position count (50), row configuration (2 rows), contact type (Male Pin), mounting style (Through Hole, Right Angle), and operating temperature range (-55°C ~ 105°C). The mating interface is compatible.

Q: What are the differences in shrouding between the original and substitute parts?

A: The 3433-1302 features 3-wall shrouding, while D3433-5002-AR and N3433-5002RB feature 4-wall shrouding. This provides additional mechanical protection and EMI shielding in the substitute parts. The insulation height increases from 0.310" to 0.340" in the substitutes.

Q: How do the fastening mechanisms differ?

A: The 3433-1302 uses Latch Lock/Eject Hooks with long engagement. D3433-5002-AR and N3433-5002RB use Push-Pull fastening. Both mechanisms provide secure mating; however, the engagement and disengagement procedures differ. Mechanical clearance and connector orientation in the application must be verified.

Q: What is the significance of the current rating increase from 1A to 1.75A?

A: The substitute parts support higher current capacity. This does not affect compatibility but indicates improved contact design and material specifications. Applications limited to 1A operation remain fully compatible.

Q: Are there RoHS compliance differences?

A: The 3433-1302 is RoHS non-compliant. D3433-5002-AR is ROHS3 compliant, and N3433-5002RB is RoHS compliant. For applications requiring RoHS compliance, either substitute part is suitable.

Q: What packaging options are available?

A: D3433-5002-AR is supplied in trays (standard for automated pick-and-place assembly). N3433-5002RB is supplied in bulk packaging (suitable for manual assembly or high-volume applications).

Q: Do the contact material differences affect substitution?

A: The 3433-1302 and N3433-5002RB use Copper Alloy contacts, while D3433-5002-AR uses Brass contacts. Both materials are compatible with the gold mating finish and maintain electrical performance within the specified operating parameters.

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