Molex 0423751925 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Molex 0423751925 is a vertical through-hole rectangular connector header with 5 positions at 2.54mm pitch, designed for board-to-board or cable connections. This KK254 series component features male pins with tin-plated contacts, unshrouded design, and solder termination. The part is currently active in production with 823 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative contact finishes or insulation materials are required for specific applications, or when different operating temperature ranges are needed for specialized environments.

Key Parameters

Parameter	Value
Manufacturer Part Number	0423751925
Manufacturer	Molex
Series	KK254, 42375
Connector Type	Header, Breakaway
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	5
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Tin
Contact Finish Thickness - Mating	100.0µin (2.54µm)
Insulation Material	Polyamide (PA), Nylon, Glass Filled
Insulation Color	Black
Material Flammability Rating	UL94 V-0
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0423751925 is determined by the following critical parameters:

Pitch - Mating: 0.100" (2.54mm) - must match exactly
Number of Positions: 5 - must match exactly
Number of Rows: 1 - must match exactly
Connector Type: Header with male pins - must match
Mounting Type: Through Hole - must match
Termination: Solder - must match
Fastening Type: Push-Pull - must match
Shrouding: Unshrouded - must match

Substitute parts may vary in the following parameters while maintaining functional compatibility:

Contact Finish (Tin or Gold variants)
Contact Finish Thickness
Insulation Material (Polyamide, Polycyclohexylenedimethylene Terephthalate, or Thermoplastic)
Operating Temperature Range
Contact Material (Phosphor Bronze acceptable)
Overall Contact Length and Post Length (within mechanical tolerance)
RoHS and REACH compliance status

Parameter Comparison

Parameter	0423751925 (Main)	54101-T06-05	68000-105HLF	68000-205HLF	68000-405HLF	68002-205HLF	69190-105HLF	69190-405HLF	75160-102-05LF	77311-101-05LF	77311-102-05LF
Manufacturer	Molex	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	KK254, 42375	BERGSTIK®	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK® II	BERGSTIK®	BERGSTIK®	BERGSTIK®
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)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	5	5	5	5	5	5	5	5	5	5	5
Number of Rows	1	1	1	1	1	1	1	1	1	1	1
Connector Type	Header, Breakaway	Header	Header	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	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Press-Fit, Solder	Press-Fit, Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Finish - Mating	Tin	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Finish Thickness - Mating	100.0µin (2.54µm)	100.0µin (2.54µm)	30.0µin (0.76µm)	15.0µin (0.38µm)	100.0µin (2.54µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	100.0µin (2.54µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Material	-	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
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	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature	-	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 125°C	-65°C ~ 125°C
Current Rating (Amps)	-	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A	3A	3A	5A	3A per Contact	3A per Contact
Product Status	Active	Obsolete	Active	Active	Active	Active	Active	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For applications requiring RoHS3 compliance, the following active substitute parts are recommended: 68000-105HLF, 68000-205HLF, 68000-405HLF, 68002-205HLF, 69190-105HLF, 69190-405HLF, 77311-101-05LF, and 77311-102-05LF. All of these parts maintain the critical electrical and mechanical parameters of the Molex 0423751925 while offering RoHS compliance.

For applications with extended operating temperature requirements up to 130°C, parts 68002-205HLF, 69190-105HLF, 69190-405HLF, and 75160-102-05LF provide this capability.

Parts 54101-T06-05 and 75160-102-05LF are obsolete and should not be selected for new designs, though they may be used in legacy system maintenance where existing inventory is available.

For tin-plated contact finishes matching the original specification, select 68000-405HLF or 69190-405HLF. For gold-plated alternatives, select from 68000-105HLF, 68000-205HLF, 68002-205HLF, 69190-105HLF, 77311-101-05LF, or 77311-102-05LF.

Frequently Asked Questions (FAQ)

Q: Can I use a gold-plated substitute in place of the tin-plated Molex 0423751925?

A: Yes. Gold-plated contacts (68000-105HLF, 68000-205HLF, 68002-205HLF, 69190-105HLF, 77311-101-05LF, 77311-102-05LF) are functionally compatible. Gold plating provides superior corrosion resistance and is often preferred in high-reliability applications. The contact finish does not affect mechanical fit or electrical performance in standard applications.

Q: What is the difference between BERGSTIK® and BERGSTIK® II series?

A: Both series maintain identical pitch, position count, and mechanical compatibility. BERGSTIK® II represents a newer product line with improved design and materials. BERGSTIK® II parts are generally preferred for new designs due to active production status and enhanced specifications.

Q: Are press-fit termination variants (69190-105HLF, 69190-405HLF) compatible with solder-only PCB designs?

A: Press-fit termination variants support both press-fit and solder termination methods. They are fully compatible with solder-only PCB designs and provide additional flexibility for manufacturing processes.

Q: Does the operating temperature range affect mechanical compatibility?

A: No. Operating temperature range does not affect mechanical fit or mating compatibility. Selection should be based on the thermal requirements of the specific application. Parts rated to -65°C ~ 130°C (68002-205HLF, 69190-105HLF, 69190-405HLF, 75160-102-05LF) are suitable for extended temperature environments.

Q: What packaging options are available?

A: The Molex 0423751925 is supplied in Bulk packaging. Substitute parts are available in Bulk (69190-105HLF, 77311-101-05LF, 77311-102-05LF) or Bag packaging (68000-105HLF, 68000-205HLF, 68000-405HLF, 68002-205HLF, 69190-405HLF). Packaging does not affect component performance or compatibility.

Q: Which substitute parts maintain REACH Unaffected status like the original?

A: Only 77311-101-05LF maintains REACH Unaffected status. All other substitute parts are REACH Affected. For applications requiring REACH Unaffected compliance, 77311-101-05LF is the only available option.

Q: Can I substitute a part with higher current rating (75160-102-05LF at 5A)?

A: Yes. A substitute with higher current rating (5A versus 3A) is mechanically and electrically compatible and provides additional design margin. This substitution is acceptable for any application using the original 3A-rated part.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message