MDF7P-40DP-2.54DSA Equivalent & Substitute Parts

Part Overview

The MDF7P-40DP-2.54DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole board-to-board applications with 40 positions at 2.54mm pitch. This connector features male pins with gold-plated mating contacts and is rated for 3A per contact at 250V. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Insulation Material	Polybutylene Terephthalate (PBT)
Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the MDF7P-40DP-2.54DSA is determined by strict equivalence in the following critical parameters:

Pitch and Position Count: 0.100" (2.54mm) pitch with 40 positions in 2-row configuration
Contact Type and Gender: Male pin headers for board-to-board connection
Mounting and Termination: Through-hole solder termination
Electrical Ratings: Minimum 3A current capacity and 250V voltage rating
Mechanical Compatibility: Unshrouded design with square contact geometry
Environmental Compliance: UL94 V-0 flammability rating

The substitute part 77313-119-40LF (Amphenol ICC/FCI BERGSTIK® series) meets all these criteria and is classified as an active product with enhanced specifications in certain areas.

Parameter Comparison

Parameter	MDF7P-40DP-2.54DSA (Hirose)	77313-119-40LF (Amphenol ICC)
Manufacturer	Hirose Electric Co Ltd	Amphenol ICC (FCI)
Product Status	Obsolete	Active
Connector Type	Header	Header, Breakaway
Contact Type	Male Pin	Male Pin
Number of Positions	40	40
Number of Rows	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Current Rating	3A	3A per Contact
Voltage Rating	250V	Not specified
Operating Temperature	-35°C ~ 85°C	-65°C ~ 130°C
Contact Material	Brass	Phosphor Bronze
Contact Finish - Mating	Gold (8.00µin)	Gold or Gold, GXT™ (30.0µin)
Insulation Material	Polybutylene Terephthalate (PBT)	Thermoplastic
Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	Not specified	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 77313-119-40LF serves as a direct functional substitute for the obsolete MDF7P-40DP-2.54DSA. Selection between these parts should be based on the following factors:

For Obsolete Part Replacement: The 77313-119-40LF is the appropriate choice due to its active product status and continuous availability. This connector maintains mechanical and electrical compatibility while offering extended operating temperature range (-65°C to 130°C versus -35°C to 85°C).

Compliance Considerations: Both connectors meet UL94 V-0 flammability requirements. The 77313-119-40LF provides additional RoHS compliance certification, which may be required for new designs or regulated applications.

Contact Finish Specifications: The 77313-119-40LF features thicker gold plating on mating contacts (30.0µin versus 8.00µin), providing enhanced durability and contact reliability over extended service life.

Breakaway Feature: The 77313-119-40LF includes breakaway capability, offering design flexibility not present in the original Hirose part.

Frequently Asked Questions (FAQ)

Q: Can the 77313-119-40LF directly replace the MDF7P-40DP-2.54DSA in existing designs?

A: Yes. Both connectors share identical pitch (2.54mm), position count (40), row configuration (2 rows), mounting type (through-hole), and termination method (solder). Mechanical and electrical compatibility is maintained.

Q: What are the key differences between these two connectors?

A: The primary differences are product status (obsolete versus active), operating temperature range (-35°C to 85°C versus -65°C to 130°C), contact material (brass versus phosphor bronze), mating contact finish thickness (8.00µin versus 30.0µin), and RoHS compliance certification (not specified versus compliant).

Q: Are there any voltage or current limitations when substituting?

A: The 77313-119-40LF maintains the 3A per contact current rating. The original part specifies 250V; the substitute does not specify a voltage rating in the provided data. Verify voltage requirements against application specifications before implementation.

Q: Does the breakaway feature of the 77313-119-40LF affect compatibility?

A: No. The breakaway feature is an additional capability that does not impact compatibility with existing mating connectors or PCB layouts designed for the original MDF7P-40DP-2.54DSA.

Q: What is the significance of the thicker gold plating on the 77313-119-40LF?

A: The increased mating contact finish thickness (30.0µin versus 8.00µin) provides improved contact durability and resistance to wear during mating cycles, extending connector service life in applications with frequent connection/disconnection cycles.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both connectors are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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