L77DFC37SMP10 Equivalent & Substitute Parts

Part Overview

The L77DFC37SMP10 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with straight solder termination, tin-plated steel shell, and gold-plated contacts. The part is currently in active production status.

Equivalent and substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative mounting configurations or termination methods. This reference provides qualified substitute options that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

L77DFC37SMP10

Amphenol ICC (Commercial Products)In Stock: 671L77DFC37SMP10 Datasheet

Current PartRFQ

172-037-202R001

NorComp Inc.In Stock: 933172-037-202R001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77DFC37SMP10 is permitted when the following core parameters remain constant:

Critical Parameters (Must Match):

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 37
• Number of Rows: 2
• Shell Size, Connector Layout: 4 (DC, C)
• Contact Type: Signal
• Shell Material, Finish: Steel, Tin Plated
• Contact Finish: Gold

Allowable Variations:

• Mounting Type: Straight solder (L77DFC37SMP10) to Panel Mount (172-037-202R001)
• Termination Method: Solder to Solder Cup
• Current Rating: 7.5A (primary) to 5A (substitute) — represents a reduction in current capacity
• Operating Temperature Range: -55°C ~ 155°C (primary) to -50°C ~ 100°C (substitute) — represents a narrower operating window
• Dielectric Material: Thermoplastic, Glass Filled to Polybutylene Terephthalate (PBT), Glass Filled
• Contact Material: Copper Alloy to Brass
• Product Status: Active to Obsolete

The substitute part 172-037-202R001 (NorComp Inc., 172 M Series) qualifies as a functional equivalent based on matching critical connector geometry, contact configuration, and shell specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (L77DFC37SMP10):

The L77DFC37SMP10 is recommended for new designs and applications requiring active production status, extended operating temperature range (-55°C to 155°C), and higher current capacity (7.5A). This part maintains full RoHS compliance and offers unlimited moisture sensitivity tolerance (MSL 1).

Substitute Part Selection (172-037-202R001):

The 172-037-202R001 qualifies as a functional substitute when the following conditions are met:

1. Design accommodates panel mount configuration instead of straight solder mounting
2. Application current requirements do not exceed 5A
3. Operating temperature range remains within -50°C to 100°C
4. Design accepts solder cup termination method
5. Supply chain constraints on the primary part necessitate alternative sourcing

The substitute part carries obsolete product status, indicating discontinued manufacturing. Inventory availability (894 Pcs) may be limited to existing stock channels. ROHS3 compliance status confirms regulatory alignment with current environmental standards.

Both parts share identical connector geometry (37-position, 2-row, Shell Size 4), gold-plated contacts, UL94 V-0 flammability rating, and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the 172-037-202R001 directly replace the L77DFC37SMP10 in existing designs?

A: Direct replacement requires design modification. The primary difference is mounting configuration: L77DFC37SMP10 uses straight solder termination, while 172-037-202R001 requires panel mount installation. PCB layout and mechanical mounting structure must accommodate this change. Termination method also differs (solder vs. solder cup).

Q: What is the impact of the reduced current rating (5A vs. 7.5A) on substitution?

A: The 172-037-202R001 current rating of 5A is lower than the L77DFC37SMP10 rating of 7.5A. Substitution is permissible only when circuit design ensures total current per connector does not exceed 5A. Applications requiring the full 7.5A capacity must use the primary part.

Q: Does the narrower operating temperature range of the substitute part affect compatibility?

A: The 172-037-202R001 operates within -50°C to 100°C, compared to -55°C to 155°C for the L77DFC37SMP10. Substitution is valid only when application operating conditions remain within the -50°C to 100°C window. Applications requiring extended temperature operation must use the primary part.

Q: Are both parts RoHS compliant?

A: Yes. The L77DFC37SMP10 is RoHS Compliant. The 172-037-202R001 is ROHS3 Compliant. Both meet current environmental regulatory requirements for lead-free and restricted substance compliance.

Q: What is the significance of the obsolete product status for the 172-037-202R001?

A: Obsolete status indicates the part is no longer in active production. Availability is limited to existing inventory channels. While 894 pieces are currently in stock, future procurement may become impossible. The L77DFC37SMP10 (active status) is recommended for long-term production designs.

Q: How do the contact finish specifications differ between these parts?

A: Both parts feature gold-plated contacts. The L77DFC37SMP10 specifies 20.0µin (0.51µm) thickness, while the 172-037-202R001 specifies flash plating. Flash plating provides minimal gold coverage for corrosion protection. Applications requiring specific contact finish thickness must verify compatibility with the substitute part's flash specification.

Q: Can these connectors be used interchangeably in the same connector mating pair?

A: Yes, both parts are 37-position D-Sub receptacles with identical shell size (4, DC/C layout) and contact configuration. They accept the same mating plugs. However, mechanical mounting differences (straight solder vs. panel mount) affect installation method and PCB integration.

Q: What packaging format is provided for the 172-037-202R001?

A: The 172-037-202R001 is supplied in Tray packaging. The L77DFC37SMP10 packaging format is not specified in the provided data. Confirm packaging requirements for automated assembly or manual handling processes.