L77DFCF37SMP10 D-Sub Receptacle 37-Position Connector

Part Overview

The L77DFCF37SMP10 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with straight solder termination and is classified as an active product. The device is RoHS compliant with MSL 1 (unlimited moisture sensitivity). Finding substitute parts may be necessary due to supply chain requirements, obsolescence prevention, or specific application requirements where alternative mounting styles or specifications are required.

Substiute Parts

L77DFCF37SMP10

Amphenol ICC (Commercial Products)In Stock: 1038L77DFCF37SMP10 Datasheet

Current PartRFQ

172-037-202R001

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77DFCF37SMP10 with alternative D-Sub receptacle connectors is restricted to parts meeting the following critical parameters:

• Connector Style: D-Sub receptacle configuration
• Number of Positions: 37-position layout
• Number of Rows: 2-row arrangement
• Shell Size, Connector Layout: 4 (DC, C)
• Connector Type: Receptacle, Female Sockets
• Contact Type: Signal contacts

The substitute part 172-037-202R001 (NorComp Inc.) shares these fundamental characteristics. However, substitution introduces specific parameter variations that must be evaluated for compatibility with the application requirements.

Parameter Comparison

Engineering Selection Recommendations

The L77DFCF37SMP10 is an active product from Amphenol ICC with current availability (952 units in stock) and full RoHS compliance. This part should be selected for new designs and applications requiring sustained supply.

The substitute part 172-037-202R001 (NorComp Inc.) carries an obsolete product status with 894 units available. This part exhibits the following limitations: reduced current rating (5A versus 7.5A), lower operating temperature maximum (100°C versus 155°C), reduced contact finish thickness (Flash versus 20.0µin), and panel mount configuration instead of straight solder termination. The substitute also does not specify a voltage rating. Applications requiring the full temperature range, higher current capacity, or straight solder termination should not rely on the 172-037-202R001.

The obsolete classification of the substitute part creates long-term supply uncertainty. Applications with high-volume requirements or extended product lifecycles should utilize the active L77DFCF37SMP10.

Frequently Asked Questions (FAQ)

What determines if a D-Sub connector can substitute for the L77DFCF37SMP10?

Substitute D-Sub connectors must maintain identical specifications for connector style (D-Sub receptacle), position count (37), row arrangement (2), shell size and layout (4/DC/C), and contact type (signal, female sockets). Variations in mounting type, current rating, operating temperature, or contact material introduce compatibility risk and must be evaluated against specific application requirements.

Can the 172-037-202R001 be used as a direct replacement for the L77DFCF37SMP10?

The 172-037-202R001 shares core mechanical and electrical characteristics but introduces several parameter differences: panel mount versus straight solder termination, 5A current rating versus 7.5A, operating temperature maximum of 100°C versus 155°C, and different contact material composition (brass versus copper alloy). Additionally, the product is classified as obsolete. Substitution is conditional upon the application's tolerance for these parameter variations.

What is the impact of the mounting type difference between the main part and substitute?

The L77DFCF37SMP10 features straight solder termination for PCB integration, while the 172-037-202R001 is configured for panel mount installation. These mounting types are not interchangeable and require different mechanical integration approaches. Mounting type selection is determined by enclosure design and board layout requirements.

Why is the operating temperature range different?

The L77DFCF37SMP10 operates across -55°C to 155°C, while the 172-037-202R001 is limited to -50°C to 100°C. This difference reflects variations in dielectric material composition (Thermoplastic versus PBT). Applications requiring extended temperature operation must use the main part specification.

Does the obsolete status of the substitute part affect its suitability?

The 172-037-202R001 carries an obsolete classification, indicating discontinued manufacturing and limited future availability. While current inventory exists (894 units), obsolete parts present supply chain risk for volume production or extended product lifecycles. New designs should specify the active L77DFCF37SMP10.

What is the significance of contact finish thickness differences?

The L77DFCF37SMP10 specifies gold plating at 20.0µin (0.51µm) thickness, while the 172-037-202R001 uses flash gold plating. Specified thickness ensures consistent contact resistance and corrosion protection. Flash plating provides minimal coating and is suitable for lower-stress applications. Higher-performance applications requiring enhanced contact durability should specify the thicker gold finish.