MDF7-12D-2.54DSA Equivalent & Substitute Parts

Part Overview

The MDF7-12D-2.54DSA is a 12-position rectangular receptacle connector manufactured by Hirose Electric Co Ltd, designed for board-to-board applications with 0.100" (2.54mm) pitch through-hole mounting. This connector features a bottom-entry configuration with tin-plated mating contacts and is rated for 3A at 250VAC operation across -35°C to 85°C. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing system support and procurement.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom Entry
Number of Positions	12
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Current Rating	3A
Voltage Rating	250VAC
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0
Insulation Material	Polyamide (PA), Nylon
Contact Material	Phosphor Bronze
Contact Shape	Square

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-12D-2.54DSA is determined by strict equivalence across the following critical parameters:

Connector type and entry configuration (Receptacle, Bottom Entry)
Position count and row configuration (12 positions, 2 rows)
Mating pitch and row spacing (0.100" / 2.54mm)
Mounting and termination method (Through Hole, Solder)
Electrical ratings (3A, 250VAC)
Operating temperature range (-35°C ~ 85°C)
Insulation material and flammability rating (Polyamide/Nylon, UL94 V-0)
Contact material and shape (Phosphor Bronze, Square)

The MDF7-12D-2.54DSA(56) qualifies as a direct substitute based on identical compliance across all these parameters. The primary difference is the contact finish specification on the mating surface (Gold vs. Tin), which does not affect mechanical or electrical compatibility within the defined operating envelope.

Parameter Comparison

Parameter	MDF7-12D-2.54DSA	MDF7-12D-2.54DSA(56)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	MDF7	MDF7
Product Status	Obsolete	Active
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Number of Positions	12	12
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Finish - Mating	Tin	Gold
Insulation Color	Black	Black
Insulation Height	0.197" (5.00mm)	0.197" (5.00mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Current Rating (Amps)	3A	3A
Voltage Rating	250VAC	250VAC
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Contact Shape	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The MDF7-12D-2.54DSA(56) is the direct substitute for the obsolete MDF7-12D-2.54DSA. Both connectors maintain identical mechanical and electrical specifications across all critical parameters. The substitute part offers the additional advantage of active product status and ROHS3 compliance, addressing regulatory requirements for new designs and procurement cycles. The tin-plated original and gold-plated substitute are mechanically and electrically interchangeable within the specified operating envelope. Selection between these finishes should be based on system-level compliance requirements and procurement availability.

Frequently Asked Questions (FAQ)

Q: Can MDF7-12D-2.54DSA(56) be used as a direct replacement for MDF7-12D-2.54DSA?

A: Yes. Both connectors are identical in connector type, position count, pitch, mounting configuration, electrical ratings, and operating temperature range. The gold contact finish of the substitute does not affect mechanical or electrical compatibility.

Q: What is the significance of the contact finish difference between tin and gold?

A: Contact finish affects corrosion resistance and contact reliability characteristics. Both tin and gold finishes are suitable for the specified 3A, 250VAC operating conditions. Selection should align with system-level environmental and compliance requirements.

Q: Why is the original part listed as obsolete?

A: Obsolescence indicates the manufacturer has discontinued production. The MDF7-12D-2.54DSA(56) remains in active production and serves as the current equivalent for ongoing procurement and system support.

Q: Does the RoHS3 compliance of the substitute affect compatibility?

A: No. RoHS3 compliance is a regulatory attribute that does not impact mechanical or electrical compatibility. It indicates the substitute meets current environmental standards for new designs and procurement.

Q: Are there any packaging differences between these parts?

A: The original part packaging is not specified in the available data. The substitute is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Can these connectors be used interchangeably in existing assemblies?

A: Yes, provided the assembly design accommodates the specified connector type, position count, pitch, and mounting configuration. Both parts meet identical electrical and mechanical requirements.

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