L717DC37PAM4B D-Sub 37 Position Right Angle Solder Plug Connector

Part Overview

The L717DC37PAM4B is a 37 position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products) with male pins, right angle mounting, and solder termination. This connector is classified as a D-shaped connector (Shell Size 4, DC/C layout) designed for signal applications in through-hole and right-angle configurations. The part maintains Active product status with 801 units in current inventory.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements shift between active and obsolete product lines, or when alternative manufacturers' components meet the same electrical and mechanical specifications. This reference provides engineering-validated substitute options based on connector configuration, pin count, mounting style, and electrical ratings.

Substiute Parts

L717DC37PAM4B

Amphenol ICC (Commercial Products)In Stock: 900L717DC37PAM4B Datasheet

Current PartRFQ

173-E37-111R141

NorComp Inc.In Stock: 740173-E37-111R141 Datasheet

SimilarRFQ

174-E37-111R001

NorComp Inc.In Stock: 777174-E37-111R001 Datasheet

SimilarRFQ

174-E37-111R141

NorComp Inc.In Stock: 736174-E37-111R141 Datasheet

SimilarRFQ

M24308/24-28F

ITT Cannon, LLCIn Stock: 1457M24308/24-28F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L717DC37PAM4B is determined by the following critical parameters:

Primary Matching Criteria:

• 37 position pin count (mandatory)
• D-Sub connector style with Shell Size 4 (DC, C) layout (mandatory)
• Plug configuration with male pins (mandatory)
• Right angle mounting orientation (mandatory)
• Solder termination method (mandatory)

Secondary Compatibility Parameters:

• Current rating of 5A or higher
• Operating temperature range that encompasses or exceeds -55°C to 125°C
• Gold contact finish
• UL94 V-0 flammability rating
• Brass contact material

Acceptable Variations:

• Shell finish material (tin plated, yellow chromate plated, or cadmium plated)
• Backset spacing differences (connector body depth)
• Flange feature configuration (unthreaded housing or female screwlock)
• Dielectric material composition (thermoplastic glass-filled or polyamide)
• Contact finish thickness (flash or plated)

Non-Substitutable Parameters:

• Pin count (must remain 37)
• Connector gender (must remain plug/male)
• Shell size (must remain Size 4)
• Mounting style (must remain right angle through-hole)
• Termination method (must remain solder)

The substitute parts listed below meet the primary matching criteria and maintain compatibility within acceptable secondary parameter variations.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L717DC37PAM4B (Amphenol ICC)

The L717DC37PAM4B remains the preferred component for new designs and applications requiring RoHS compliance. This part is Active in product status, carries RoHS Compliant certification, and provides the highest operating temperature upper limit (125°C) among all options. The 7.5A current rating and 300V voltage rating support demanding signal applications. Tin plating on the steel shell provides corrosion resistance suitable for commercial environments.

Secondary Selection: M24308/24-28F (ITT Cannon, LLC)

The M24308/24-28F serves as an active alternative when the L717DC37PAM4B becomes unavailable. This part maintains Active product status and matches the 7.5A current rating. The operating temperature range extends to 150°C, exceeding the primary part's specification. However, this part is RoHS non-compliant and carries cadmium plating, which restricts its use in applications subject to RoHS regulations. The M24308/24-28F is suitable for legacy systems and applications where RoHS compliance is not required. Inventory availability is high (1409 units).

Tertiary Selection: 173-E37-111R141, 174-E37-111R001, 174-E37-111R141 (NorComp Inc.)

All three NorComp parts are classified as Obsolete and RoHS non-compliant. These components are suitable only for replacement in existing systems where the original part is no longer available and where RoHS compliance is not mandated. The NorComp parts carry a reduced current rating of 5A, which may limit their application in high-current signal scenarios. Operating temperature range is restricted to -50°C to 100°C, narrower than the primary part. Backset spacing variations (0.283" for 173-E37-111R141 versus 0.370" for 174-E37 variants) affect connector body depth and may require PCB layout adjustments.

Compliance Considerations:

• For RoHS-regulated applications: Use L717DC37PAM4B exclusively
• For legacy systems without RoHS requirements: M24308/24-28F or NorComp variants are acceptable
• For high-temperature applications exceeding 125°C: M24308/24-28F supports up to 150°C
• For applications requiring 7.5A current rating: L717DC37PAM4B or M24308/24-28F only

Mechanical Compatibility:

Backset spacing differences between parts require verification against PCB layout and mating connector specifications. The L717DC37PAM4B backset of 0.590" (14.99mm) differs significantly from NorComp variants. Flange feature variations (unthreaded housing versus female screwlock) affect mounting bracket compatibility and must be confirmed for panel-mount applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the L717DC37PAM4B with a NorComp 173-E37-111R141 or 174-E37 variant?

A: Substitution is mechanically and electrically feasible based on core connector parameters (37 positions, D-Sub Size 4, right angle solder plug). However, three critical differences exist: (1) NorComp parts are Obsolete and RoHS non-compliant, restricting use in regulated applications; (2) Current rating is reduced to 5A versus 7.5A on the primary part; (3) Operating temperature range is limited to -50°C to 100°C versus -55°C to 125°C. Backset spacing also differs, potentially requiring PCB layout verification. Substitution is acceptable only for legacy system replacement where RoHS compliance is not required and current/temperature specifications are within acceptable limits.

Q: What is the difference between the 173-E37-111R141 and 174-E37-111R141?

A: Both are NorComp 37-position D-Sub plugs with identical electrical ratings (5A, -50°C to 100°C) and flange features (female screwlock 4-40). The primary difference is backset spacing: 173-E37-111R141 has 0.283" (7.20mm) backset, while 174-E37-111R141 has 0.370" (9.40mm) backset. This affects connector body depth and requires verification against mating connector and PCB layout specifications. Both parts are Obsolete and RoHS non-compliant.

Q: Is the M24308/24-28F a direct replacement for the L717DC37PAM4B?

A: The M24308/24-28F is mechanically and electrically compatible as a substitute. Both are 37-position D-Sub plugs with 7.5A current rating, right angle solder termination, and UL94 V-0 flammability rating. The M24308/24-28F extends the operating temperature range to 150°C. However, critical differences exist: (1) M24308/24-28F is RoHS non-compliant with cadmium plating, restricting use in RoHS-regulated applications; (2) Contact finish thickness differs (50.0µin versus 8.00µin); (3) Dielectric material is polyester versus thermoplastic glass-filled. The M24308/24-28F is suitable for legacy systems and high-temperature applications where RoHS compliance is not required.

Q: What does "Obsolete" product status mean for the NorComp parts?

A: Obsolete status indicates that the manufacturer has discontinued production and no longer supports these parts. While inventory may be available from distributors (693-764 units per the data provided), future availability is not guaranteed. Obsolete parts should be used only for replacement in existing systems where the original part is no longer available. For new designs, Active parts (L717DC37PAM4B or M24308/24-28F) are recommended.

Q: Why does the L717DC37PAM4B have a higher backset spacing (0.590") than the NorComp variants?

A: Backset spacing is the distance from the connector mounting face to the rear of the connector body. Different manufacturers design connectors with varying body depths based on internal component arrangement and design philosophy. The L717DC37PAM4B's 0.590" backset is longer than the NorComp 0.283" or 0.370" variants. This difference affects how far the connector protrudes from the PCB and must be verified against available panel space and mating connector specifications before substitution.

Q: Can I use a substitute part with a lower current rating (5A) in place of the 7.5A-rated L717DC37PAM4B?

A: Substitution with a 5A-rated part (NorComp variants) is acceptable only if the actual circuit current does not exceed 5A. If the application requires sustained current above 5A, the 5A-rated substitute will operate outside its design specification and may experience premature contact wear or thermal stress. For applications requiring 7.5A or higher, use only the L717DC37PAM4B or M24308/24-28F.

Q: What is the significance of contact finish thickness (8.00µin versus Flash versus 50.0µin)?

A: Contact finish thickness affects contact durability and mating cycle life. The L717DC37PAM4B specifies 8.00µin (0.203µm) of gold plating, providing a defined wear layer. Flash plating (NorComp variants) applies a minimal gold layer, typically 0.5-1.0µin, suitable for lower-cycle applications. The M24308/24-28F specifies 50.0µin (1.27µm), providing maximum wear resistance for high-cycle mating applications. For applications with frequent connector mating/unmating, thicker gold plating extends contact life.

Q: Are all these connectors suitable for high-reliability applications?

A: All listed parts carry UL94 V-0 flammability rating and are constructed with brass contacts and gold finish, indicating suitability for signal-level applications. However, RoHS compliance status differs: only the L717DC37PAM4B is RoHS Compliant. For high-reliability applications in regulated industries (aerospace, medical, automotive with RoHS mandates), the L717DC37PAM4B is the only suitable choice. For legacy high-reliability systems without RoHS requirements, M24308/24-28F or NorComp variants may be acceptable if current and temperature specifications are verified.

Q: What packaging format is available for each part?

A: The L717DC37PAM4B is supplied in Tray packaging (801 units in stock). The NorComp variants (173-E37-111R141, 174-E37-111R001, 174-E37-111R141) are supplied in Tray packaging (693-708 units per variant). The M24308/24-28F is supplied in Bulk packaging (1409 units in stock). Tray packaging provides organized component storage and handling; Bulk packaging typically offers lower per-unit cost for high-volume applications.