Molex 0761650603 Impact Header 144-Position Backplane Connector

Part Overview

The Molex 0761650603 is a 144-position impact-style header connector with male pins designed for through-hole PCB mounting. This connector features a 0.053" (1.35mm) pitch configuration across 9 rows and 16 columns, supporting 48 differential pairs with gold-plated contacts rated for 30V operation across -55°C to 85°C. The part is currently obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	0761650603
Manufacturer	Molex
Category	Backplane Connectors
Connector Type	Header, Male Pins
Number of Positions	144
Pitch	0.053" (1.35mm)
Rows × Columns	9 × 16
Mounting Type	Through Hole
Termination	Press-Fit
Contact Finish	Gold, 30.0µin (0.76µm)
Voltage Rating	30V
Operating Temperature	-55°C ~ 85°C
Material Flammability	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0761650603 is determined by the following critical parameters:

Connector Type & Style: Header with male pins, impact configuration
Position Count: 144 positions
Physical Layout: 9 rows × 16 columns
Pitch Specification: 0.053" (1.35mm) for direct mechanical compatibility
Mounting & Termination: Through-hole PCB mounting with press-fit termination
Electrical Ratings: Voltage and temperature operating ranges
Contact Finish: Gold plating for signal integrity
Compliance: RoHS3 and UL94 V-0 flammability rating

The substitute parts are grouped into two categories:

Category 1 - Direct Molex Equivalent: Part 0761651603 maintains identical electrical and mechanical specifications with active product status and tray packaging.

Category 2 - TE Connectivity Cross-Substitutes: Parts 1934343-1, 1934344-1, 1934345-1, 1934346-1, and 2007804-3 provide functional equivalence with 144 positions and 9×16 layout. These parts operate at higher voltage ratings (250V) and current capacity (0.5A) with extended temperature ranges (-65°C ~ 90°C), offering enhanced performance margins. Pitch specifications vary between 0.075" (1.90mm) and 0.075" (1.91mm), requiring PCB redesign for mechanical compatibility.

Parameter Comparison

Parameter	0761650603 (Main)	0761651603	1934343-1	1934344-1	1934345-1	1934346-1	2007804-3
Manufacturer	Molex	Molex	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Number of Positions	144	144	144	144	144	144	144
Rows × Columns	9 × 16	9 × 16	9 × 16	9 × 16	9 × 16	9 × 16	9 × 16
Pitch	0.053" (1.35mm)	0.053" (1.35mm)	0.075" (1.90mm)	0.075" (1.90mm)	0.075" (1.90mm)	0.075" (1.90mm)	0.075" (1.91mm)
Connector Type	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins	Header, Male Pins
Connector Style	Impact	Impact	Z-PACK TinMan	High Speed	High Speed	High Speed	Impact
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit	Press-Fit
Voltage Rating	30V	30V	250V	250V	250V	250V	—
Current Rating	—	—	0.5A	0.5A	0.5A	0.5A	—
Operating Temperature	-55°C ~ 85°C	-55°C ~ 85°C	-65°C ~ 90°C	-65°C ~ 90°C	-65°C ~ 90°C	-65°C ~ 90°C	-55°C ~ 85°C
Contact Finish	Gold, 30.0µin	Gold, 30.0µin	—	Gold, 30.0µin	—	Gold, 30.0µin	Gold, 30.0µin
Material Flammability	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Packaging	—	Tray	Tube	Tube	Tube	Tube	Bulk

Engineering Selection Recommendations

For Direct Replacement (No PCB Redesign Required):

Select Molex 0761651603 when maintaining the original 0.053" (1.35mm) pitch specification is mandatory. This part provides identical mechanical and electrical compatibility with active product status and ROHS3 compliance. Current inventory of 973 units supports immediate procurement.

For Enhanced Performance with PCB Redesign:

TE Connectivity parts 1934343-1, 1934344-1, 1934345-1, 1934346-1, and 2007804-3 are suitable when PCB layout modification is feasible. These substitutes offer:

Increased voltage rating (250V vs. 30V) for higher-margin designs
Extended temperature operating range (-65°C ~ 90°C vs. -55°C ~ 85°C)
Current capacity specification (0.5A) for power distribution applications
Larger pitch (0.075" vs. 0.053") reducing manufacturing complexity

All substitute parts maintain UL94 V-0 flammability compliance and RoHS certification status. Selection between TE Connectivity options depends on connector style requirements: Z-PACK TinMan series (1934343-1, 1934345-1) for standard backplane applications, High Speed variants (1934344-1, 1934346-1) for signal integrity, or Impact style (2007804-3) for mechanical robustness.

Frequently Asked Questions (FAQ)

Q: Can Molex 0761650603 be replaced with TE Connectivity parts without PCB modification?

A: No. The TE Connectivity substitutes feature 0.075" (1.90–1.91mm) pitch versus the original 0.053" (1.35mm) pitch. Direct socket compatibility is not possible; PCB footprint redesign is required.

Q: Is Molex 0761651603 a true equivalent to the obsolete 0761650603?

A: Yes. Part 0761651603 maintains identical specifications: 144 positions, 0.053" pitch, 9×16 layout, gold contact finish, 30V rating, and -55°C ~ 85°C operating range. The only difference is active product status and tray packaging.

Q: What are the key differences between TE Connectivity substitute options?

A: Parts 1934343-1 and 1934345-1 use Z-PACK TinMan connector style with 96 signal and 48 ground contact layout. Parts 1934344-1 and 1934346-1 are High Speed variants with gold contact finish. Part 2007804-3 maintains Impact style matching the original connector family. All operate at 250V and 0.5A with -65°C ~ 90°C temperature range.

Q: Are all substitute parts RoHS3 compliant?

A: Parts 0761651603, 1934345-1, 1934346-1, and 2007804-3 are ROHS3 compliant. Parts 1934343-1 and 1934344-1 carry RoHS compliance without ROHS3 designation. Verify compliance requirements for your application.

Q: What packaging options are available for procurement?

A: Molex 0761651603 is supplied in Tray packaging (973 units available). TE Connectivity parts are available in Tube packaging (1934343-1: 1094 units, 1934344-1: 976 units, 1934345-1: 977 units, 1934346-1: 1437 units) or Bulk packaging (2007804-3: 769 units).

Q: Can the original 0.053" pitch be maintained with an alternative manufacturer?

A: No alternative manufacturers provide 144-position headers at 0.053" pitch within the provided substitute list. Molex 0761651603 is the only option preserving original pitch specifications.

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