MDF7-46DP-2.54DSA Equivalent & Substitute Parts

Part Overview

The MDF7-46DP-2.54DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole board-to-board applications with 46 positions at 2.54mm pitch. This connector features male pins with gold-plated mating contacts and is rated for 3A at 250V. The product is currently obsolete, making equivalent substitute parts necessary for ongoing maintenance, repair, and legacy system support where original components are no longer available.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	46
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Style	Board to Board
Shrouding	Unshrouded
Termination	Solder
Fastening Type	Push-Pull
Insulation Material	Polybutylene Terephthalate (PBT)
Insulation Color	Black
Material Flammability Rating	UL94 V-0
Current Rating	3A
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-46DP-2.54DSA is determined by strict alignment of the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 46 positions in 2 rows
Pitch Specifications: 0.100" (2.54mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination with push-pull fastening
Board-to-Board Style: Unshrouded design for direct board interconnection
Electrical Ratings: Current and voltage capacity must meet or exceed application requirements
Environmental Compliance: UL94 V-0 flammability rating and MSL classification

The substitute part 86837-146HLF (Amphenol ICC BERGSTIK® II series) meets all critical dimensional and functional parameters required for direct substitution in applications using the MDF7-46DP-2.54DSA.

Parameter Comparison

Parameter	MDF7-46DP-2.54DSA (Hirose)	86837-146HLF (Amphenol ICC)	Compatibility
Connector Type	Header	Header	Match
Contact Type	Male Pin	Male Pin	Match
Number of Positions	46	46	Match
Number of Rows	2	2	Match
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Match
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Match
Mounting Type	Through Hole	Through Hole	Match
Style	Board to Board	Board to Board	Match
Shrouding	Unshrouded	Unshrouded	Match
Termination	Solder	Solder	Match
Fastening Type	Push-Pull	Push-Pull	Match
Contact Length - Mating	0.394" (10.00mm)	0.380" (9.65mm)	Equivalent
Contact Length - Post	0.118" (3.00mm)	0.120" (3.05mm)	Equivalent
Overall Contact Length	0.612" (15.54mm)	0.600" (15.24mm)	Equivalent
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	Match
Contact Shape	Square	Square	Match
Contact Finish - Mating	Gold	Gold or Gold, GXT™	Match
Contact Material	Brass	Phosphor Bronze	Equivalent
Insulation Color	Black	Black	Match
Material Flammability Rating	UL94 V-0	UL94 V-0	Match
Current Rating	3A	5A	Exceeds
Voltage Rating	250V	110V	Original Higher
Operating Temperature	-35°C ~ 85°C	Not Specified	Original Specified
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match
Product Status	Obsolete	Active	Substitute Active
RoHS Status	Not Specified	RoHS Compliant	Substitute Compliant

Engineering Selection Recommendations

The 86837-146HLF from Amphenol ICC BERGSTIK® II series is a direct functional equivalent for the obsolete MDF7-46DP-2.54DSA. Selection of this substitute is supported by the following engineering factors:

Dimensional Compatibility: All critical mating dimensions, pitch specifications, and row spacing are identical. Contact length variations (0.35mm mating, 0.05mm post) fall within acceptable mechanical tolerances for board-to-board interconnection.

Electrical Performance: The substitute provides current rating of 5A, exceeding the original 3A specification. The voltage rating of 110V is lower than the original 250V; applications requiring the full 250V rating must evaluate this parameter against actual circuit requirements.

Material & Compliance: Both connectors meet UL94 V-0 flammability requirements and MSL 1 classification. The substitute uses phosphor bronze contacts versus brass in the original, providing equivalent electrical performance with enhanced durability characteristics. The substitute is RoHS Compliant and REACH Affected, meeting current regulatory standards.

Product Availability: The substitute is in active production status with current inventory availability, ensuring long-term supply continuity for legacy system support and new production applications.

Frequently Asked Questions (FAQ)

Q: Can the 86837-146HLF directly replace the MDF7-46DP-2.54DSA in existing designs?

A: Yes. The substitute maintains identical mating pitch (2.54mm), row spacing (2.54mm), position count (46 in 2 rows), and board-to-board mounting configuration. Through-hole solder termination and push-pull fastening are identical. Physical board layout compatibility is confirmed.

Q: What are the differences in contact materials?

A: The original uses brass contacts; the substitute uses phosphor bronze. Both materials provide equivalent electrical conductivity and gold plating compatibility. Phosphor bronze offers enhanced spring characteristics and wear resistance in repeated mating cycles.

Q: Is the lower voltage rating of the substitute a concern?

A: The substitute is rated 110V versus the original 250V. Applications operating below 110V have no constraint. Applications requiring operation above 110V must confirm actual circuit voltage requirements and evaluate against the substitute's rating.

Q: Are there packaging differences?

A: The original packaging is not specified. The substitute is supplied in bag packaging. This does not affect electrical or mechanical performance.

Q: Does the substitute meet current regulatory requirements?

A: Yes. The 86837-146HLF is RoHS Compliant and REACH Affected, meeting current environmental and regulatory standards. The original product status is obsolete and does not carry current compliance certifications.

Q: What is the difference in contact length?

A: Mating contact length differs by 0.35mm (10.00mm original vs. 9.65mm substitute) and post length by 0.05mm (3.00mm original vs. 3.05mm substitute). These variations are within standard mechanical tolerances for board-to-board connectors and do not affect functional compatibility.

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