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MDF7-9P-2.54DSA(55) Equivalent & Substitute Parts
Part Overview
The MDF7-9P-2.54DSA(55) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 9 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part operates within -35°C to 85°C temperature range with a 3A current rating at 250V, suitable for board-to-board applications requiring push-pull fastening.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MDF7-9P-2.54DSA(55) |
| Manufacturer | Hirose Electric Co Ltd |
| Category | Rectangular Connectors |
| Connector Type | Header |
| Contact Type | Male Pin |
| Pitch - Mating | 0.100" (2.54mm) |
| Number of Positions | 9 |
| Number of Rows | 1 |
| Mounting Type | Through Hole |
| Termination | Solder |
| Fastening Type | Push-Pull |
| Contact Shape | Square |
| Insulation Material | Polybutylene Terephthalate (PBT) |
| Operating Temperature | -35°C ~ 85°C |
| Current Rating | 3A |
| Voltage Rating | 250V |
| Material Flammability Rating | UL94 V-0 |
| RoHS Status | RoHS Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the MDF7-9P-2.54DSA(55) is determined by the following critical parameters:
- Pitch - Mating: 0.100" (2.54mm)
- Number of Positions: 9
- Number of Rows: 1
- Contact Type: Male Pin
- Mounting Type: Through Hole
- Termination: Solder
- Fastening Type: Push-Pull
- Material Flammability Rating: UL94 V-0
- Connector Type: Header
Substitute parts must maintain compatibility across these core electrical and mechanical specifications. Variations in contact length, contact finish, insulation material, and operating temperature range are permissible when the primary mating interface parameters remain consistent.
Parameter Comparison
| Parameter | MDF7-9P-2.54DSA(55) | MDF7-9P-2.54DSA(95) | 0022303093 (Molex) | 929700-01-09 (3M) | 929700-01-09-RK (3M) | 929705-01-09-EU (3M) | 929705-01-09-I (3M) |
|---|---|---|---|---|---|---|---|
| Manufacturer | Hirose | Hirose | Molex | 3M | 3M | 3M | 3M |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| 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) |
| Number of Positions | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Number of Rows | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Contact Type | 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 |
| Termination | Solder | Solder | Kinked Pin, Solder | Solder | Solder | Solder | Solder |
| Fastening Type | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull | Push-Pull |
| Contact Shape | Square | Square | Square | Square | Square | Square | Square |
| Contact Finish - Mating | Tin | Tin | Tin | Tin-Lead | Tin | Gold | Gold |
| Insulation Material | PBT | PBT | PA, Nylon, Glass Filled | PBT, Polyester, Glass Filled | PCT | PCT | PBT, Polyester, Glass Filled |
| Operating Temperature | -35°C ~ 85°C | -35°C ~ 85°C | Not specified | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 105°C |
| Current Rating | 3A | 3A | Not specified | 2.5A | 2.5A | 2.5A | 2.5A |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 |
| RoHS Status | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | RoHS non-compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant |
Engineering Selection Recommendations
Primary Substitute: MDF7-9P-2.54DSA(95)
The MDF7-9P-2.54DSA(95) from Hirose Electric Co Ltd is the direct equivalent within the same manufacturer series. This part maintains identical electrical and mechanical specifications to the obsolete MDF7-9P-2.54DSA(55), with the exception of style designation (Board to Cable/Wire versus Board to Board). Both parts are RoHS Compliant, operate within the same temperature range, and carry identical current and voltage ratings. The MDF7-9P-2.54DSA(95) is currently in active production status with 1023 units in stock.
Secondary Substitutes: 3M 929 Series
The 3M 929 series connectors (929700-01-09-RK and 929705-01-09-EU/I variants) provide functional equivalence with extended operating temperature range (-40°C to 105°C). The 929700-01-09-RK variant is RoHS Compliant and maintains tin contact finish matching the original specification. The 929705 variants feature gold contact finish with RoHS Compliance and are suitable for applications requiring enhanced corrosion resistance. Current rating is 2.5A, which is lower than the original 3A specification.
Alternative Substitute: Molex 0022303093
The Molex KK254 series connector (0022303093) maintains pitch, position count, and mounting configuration compatibility. This part is ROHS3 Compliant and features kinked pin termination in addition to solder termination. Operating temperature and current rating specifications are not provided in the data.
Compliance Considerations
For new designs requiring RoHS Compliance, the MDF7-9P-2.54DSA(95), 929700-01-09-RK, and all 929705 variants are suitable. The 929700-01-09 and 929700-06-09 variants are RoHS non-compliant and should not be selected for RoHS-regulated applications.
Frequently Asked Questions (FAQ)
Q: Can the MDF7-9P-2.54DSA(95) be used as a direct replacement for the MDF7-9P-2.54DSA(55)?
A: Yes. Both parts share identical pitch (0.100"), position count (9), contact type (male pin), mounting method (through hole), and termination (solder). The primary difference is the style designation, which reflects intended application context rather than physical or electrical incompatibility.
Q: What is the significance of the contact finish difference between tin and gold variants?
A: Contact finish affects corrosion resistance and long-term reliability in specific environmental conditions. Tin-finished contacts (MDF7-9P-2.54DSA(55), MDF7-9P-2.54DSA(95), 929700-01-09-RK) are suitable for standard applications. Gold-finished contacts (929705 series) provide enhanced corrosion resistance in harsh or high-humidity environments but at increased cost.
Q: Why do 3M 929 series connectors have a lower current rating (2.5A) compared to the original (3A)?
A: Current rating is determined by contact geometry, material composition, and thermal characteristics. The 3M 929 series uses different contact dimensions and materials, resulting in a lower current-carrying capacity. Applications requiring the full 3A rating should prioritize the Hirose MDF7 series substitutes.
Q: Are the 3M 929700-01-09 and 929700-01-09-RK parts interchangeable?
A: Both parts are mechanically and electrically compatible. The primary difference is RoHS compliance status: 929700-01-09 is RoHS non-compliant, while 929700-01-09-RK is RoHS Compliant. Contact finish also differs (Tin-Lead versus Tin). Selection depends on regulatory requirements and environmental specifications.
Q: What is the difference between 929705-01-09-EU and 929705-01-09-I variants?
A: Both variants feature gold contact finish, RoHS Compliance, and identical electrical specifications. The difference lies in insulation material: 929705-01-09-EU uses Polycyclohexylenedimethylene Terephthalate (PCT), while 929705-01-09-I uses Polybutylene Terephthalate (PBT) with polyester and glass filling. Material selection affects thermal and mechanical properties in specific application environments.
Q: Can the Molex 0022303093 be used in applications requiring RoHS Compliance?
A: Yes. The Molex 0022303093 is ROHS3 Compliant. However, operating temperature and current rating specifications are not provided in the technical data, requiring verification against application requirements before selection.
Q: What packaging considerations apply when selecting substitute parts?
A: The MDF7-9P-2.54DSA(55) is supplied in standard packaging. Substitute parts are available in Bag (MDF7-9P-2.54DSA(95)) or Bulk (Molex and 3M variants) packaging. Packaging selection affects procurement quantity minimums and storage requirements but does not impact electrical or mechanical compatibility.
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