L77DC37SAM4B D-Sub 37 Position Receptacle Connector

Part Overview

The L77DC37SAM4B is a 37 position D-Sub receptacle connector manufactured by Amphenol ICC, featuring right-angle solder termination and through-hole mounting. This connector is actively produced and widely used in industrial and commercial applications requiring robust signal distribution across multiple channels.

Substitute parts become necessary when the original part reaches end-of-life status, inventory constraints occur, or design requirements shift to alternative mechanical configurations. The parts listed below provide functional equivalence within defined electrical and mechanical parameter ranges.

Substiute Parts

L77DC37SAM4B

Amphenol ICC (Commercial Products)In Stock: 1013L77DC37SAM4B Datasheet

Current PartRFQ

173-E37-211R001

NorComp Inc.In Stock: 971173-E37-211R001 Datasheet

SimilarRFQ

173-E37-211R141

NorComp Inc.In Stock: 1384173-E37-211R141 Datasheet

SimilarRFQ

174-E37-211R141

NorComp Inc.In Stock: 953174-E37-211R141 Datasheet

SimilarRFQ

174-E37-211R241

NorComp Inc.In Stock: 993174-E37-211R241 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for D-Sub 37 position receptacle connectors is determined by the following critical parameters:

Mandatory Matching Parameters:

• Connector type: Receptacle, Female Sockets
• Number of positions: 37
• Shell size and layout: 4 (DC, C)
• Termination method: Solder
• Mounting orientation: Right Angle

Allowable Variation Parameters:

• Current rating: Substitute must meet or exceed the application requirement
• Voltage rating: Substitute must meet or exceed the application requirement
• Operating temperature range: Substitute must encompass the application operating window
• Shell material and finish: Variations permitted based on environmental requirements
• Contact finish: Gold plating acceptable across all variants
• Flammability rating: UL94 V-0 maintained across all substitutes
• Backset spacing: Variations exist; mechanical fit verification required for specific applications

Compliance Considerations:

• RoHS compliance status differs between active and obsolete parts
• All listed substitutes maintain EAR99 export classification and 8536.69.4040 HTSUS code

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L77DC37SAM4B (Amphenol ICC)

The L77DC37SAM4B remains the recommended choice for new designs and ongoing production. This part is actively manufactured, RoHS compliant, and provides the highest current rating (7.5A) and widest operating temperature range (-55°C to 125°C) among all listed options. The tin-plated steel shell and 300V voltage rating support demanding industrial applications.

Substitute Selection Criteria:

All NorComp substitutes (173-E37-211R001, 173-E37-211R141, 174-E37-211R141, 174-E37-211R241) are classified as obsolete products and are not RoHS compliant. These parts are suitable only for legacy system maintenance, repair, or replacement scenarios where the original Amphenol ICC part is unavailable.

Current Rating Limitation:

All NorComp substitutes are rated at 5A maximum current, compared to the L77DC37SAM4B rating of 7.5A. Applications requiring current levels between 5A and 7.5A cannot use these substitutes without design modification or component derating analysis.

Operating Temperature Limitation:

NorComp substitutes operate within -50°C to 100°C, which is narrower than the L77DC37SAM4B range of -55°C to 125°C. Applications requiring operation below -50°C or above 100°C are incompatible with all listed substitutes.

Mechanical Compatibility:

Backset spacing varies significantly across substitute options (0.283" to 0.370" versus 0.590" for the main part). PCB layout and mechanical mounting must be verified before substitution. Flange features differ, affecting mating interface compatibility.

Compliance Status:

For applications subject to RoHS regulations, only the L77DC37SAM4B meets compliance requirements. NorComp substitutes are suitable only for non-regulated applications or legacy systems exempt from RoHS mandates.

Frequently Asked Questions (FAQ)

Q: Can I use a NorComp substitute in place of the L77DC37SAM4B in a new design?

A: No. All NorComp substitutes are obsolete and RoHS non-compliant. New designs must use the L77DC37SAM4B or equivalent active-status connectors. NorComp parts are restricted to legacy system maintenance only.

Q: What is the primary difference between the L77DC37SAM4B and NorComp substitutes?

A: The L77DC37SAM4B is actively produced and RoHS compliant with 7.5A current rating and -55°C to 125°C operating range. All NorComp substitutes are obsolete, RoHS non-compliant, limited to 5A current, and operate within -50°C to 100°C.

Q: Do the different backset spacings affect connector functionality?

A: Backset spacing determines the distance from the mounting plane to the mating face. Variations (0.283", 0.370", or 0.590") require PCB layout verification and may necessitate mechanical redesign. Substitution without layout verification can result in mating interface misalignment.

Q: Are all substitutes electrically equivalent?

A: No. Current rating differences (5A versus 7.5A) and voltage rating specification gaps create electrical limitations. Applications operating at 5A to 7.5A current levels cannot use NorComp substitutes without design modification.

Q: Which NorComp part should I select if substitution is necessary?

A: Selection depends on mechanical mounting requirements and backset spacing compatibility. 173-E37-211R001 and 173-E37-211R141 use 0.283" backset spacing; 174-E37-211R141 and 174-E37-211R241 use 0.370" backset spacing. Verify PCB layout compatibility before selection.

Q: Can I use these substitutes in high-temperature applications?

A: No. NorComp substitutes are limited to 100°C maximum operating temperature. Applications requiring operation above 100°C require the L77DC37SAM4B or alternative active-status connectors rated for higher temperatures.

Q: What is the difference between 173-E37-211R141 and 174-E37-211R141?

A: Both are 37 position D-Sub receptacles with identical electrical ratings. The primary differences are backset spacing (0.283" versus 0.370") and base product number series (173-E versus 174-E). Mechanical fit verification is required for substitution between these variants.