L77DCH37STRM5 Equivalent and Substitute Parts

Part Overview

The L77DCH37STRM5 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products), featuring female sockets with vertical through-hole solder termination. This connector is an active product with 948 pieces in stock. Alternative equivalent and substitute parts are necessary when addressing specific application requirements such as mounting type variations, panel mount configurations, thermal performance specifications, or supply chain availability.

Substiute Parts

L77DCH37STRM5

Amphenol ICC (Commercial Products)In Stock: 1057L77DCH37STRM5 Datasheet

Current PartRFQ

172-E37-213R001

NorComp Inc.In Stock: 1578172-E37-213R001 Datasheet

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172-E37-213R011

NorComp Inc.In Stock: 1242172-E37-213R011 Datasheet

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A-DF 37 PP/Z

Assmann WSW ComponentsIn Stock: 996A-DF 37 PP/Z Datasheet

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D37S24A4GX00LF

Amphenol ICC (FCI)In Stock: 1575D37S24A4GX00LF Datasheet

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D37S24A4PL00LF

Amphenol ICC (FCI)In Stock: 872D37S24A4PL00LF Datasheet

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DC37S364TLF

Amphenol ICC (FCI)In Stock: 1134DC37S364TLF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77DCH37STRM5 is determined by the following critical parameters:

1. Fixed parameters (must match exactly for direct substitution):

   • Connector Type: Receptacle, Female Sockets
   • Number of Positions: 37
   • Shell Size / Layout: 4 (DC, C)
   • Connector Style: D-Sub
   • Contact Type: Signal
   • Termination: Solder

2. Flexible parameters (variations allowed based on application requirements):

   • Mounting Type: Through Hole or Panel Mount
   • Shell Material / Finish: Steel with Tin, Nickel, or Tin-Nickel plating
   • Contact Finish Thickness: 8.00µin or Flash
   • Current Rating: 3A to 7.5A per contact
   • Voltage Rating: 250V to 300V
   • Operating Temperature Range: -55°C to -20°C minimum; 100°C to 125°C maximum
   • Flange Feature: Board Side or Housing/Shell variants
   • Dielectric Material: Thermoplastic (Glass Filled), Polyamide (PA6T), or Polybutylene Terephthalate (PBT)

The identified substitute parts maintain the 37-position D-Sub receptacle configuration with solder termination across manufacturers including NorComp Inc., Assmann WSW Components, and Amphenol ICC (FCI).

Parameter Comparison

Engineering Selection Recommendations

L77DCH37STRM5 (Primary Reference) All substitute parts share the active product status and core 37-position D-Sub receptacle configuration. Selection depends on specific application constraints:

172-E37-213R001 and 172-E37-213R011 (NorComp Inc.) Both parts offer panel mount capability with housing-mounted flanges, providing flexibility for front-panel integration. The ROHS3 compliance designation indicates updated RoHS certification. Reduced current rating (5A) and narrower temperature range (-50°C to 100°C) necessitate evaluation against application load and thermal requirements.

A-DF 37 PP/Z (Assmann WSW Components) This substitute maintains through-hole mounting with tin-plated steel shell. The 3A current rating and 250V voltage rating represent the most restrictive electrical specifications in this group and should be verified against circuit requirements. Operating temperature range (-20°C to 105°C) excludes cold-temperature applications below -20°C.

D37S24A4GX00LF and D37S24A4PL00LF (Amphenol ICC, FCI Division) Both Delta D series connectors provide 5A per-contact current rating and full -55°C to 125°C operating range matching the primary L77DCH37STRM5 specification. Tin-Nickel plating offers enhanced corrosion resistance. Flange configurations differ: GX00LF uses unthreaded 4-40 housing mount, while PL00LF uses M3 threaded mount.

DC37S364TLF (Amphenol ICC, FCI Division) This part matches voltage (300V), temperature range (-55°C to 125°C), and 5A per-contact current rating. The unthreaded housing-mounted flange and thermoplastic dielectric provide cost-optimized alternatives to board-mounted configurations.

Frequently Asked Questions (FAQ)

Q: Can the NorComp 172-E37-213R001 directly replace the L77DCH37STRM5 in any application? A: Direct substitution requires evaluation of three differences: panel mount capability alters mounting topology; 5A current rating (versus 7.5A) must be verified as sufficient; -50°C to 100°C temperature range excludes cold (<-50°C) and hot (>100°C) environments. Flange mounting hardware differs between board-side and housing-mounted designs.

Q: Which substitute part offers the closest electrical and thermal specification match? A: Both D37S24A4GX00LF and D37S24A4PL00LF from Amphenol FCI provide identical electrical performance (5A per contact) and full temperature range (-55°C to 125°C) equivalent to the L77DCH37STRM5. Selection between these two depends on flange type compatibility: GX00LF uses 4-40 mounting holes, PL00LF uses M3 threaded holes.

Q: What does the difference between "7.5A" and "5A per Contact" current rating mean? A: The L77DCH37STRM5 specifies 7.5A as a connector-level rating. Parts listed as "5A per Contact" specify per-pin current capacity. For a 37-position connector, total current capacity differs and application circuitry must be evaluated against individual contact load distribution.

Q: Are all substitute parts RoHS compliant? A: The primary L77DCH37STRM5, D37S24A4PL00LF, and DC37S364TLF are designated RoHS Compliant. The NorComp and D37S24A4GX00LF parts carry ROHS3 Compliant designation, indicating compliance with the updated RoHS Directive. The Assmann part is ROHS3 Compliant. Regulatory documentation should be verified for specific application jurisdictions.

Q: Can the Assmann A-DF 37 PP/Z be used in high-reliability applications? A: The A-DF 37 PP/Z meets UL94 V-0 flammability rating and maintains active product status. However, the 3A current rating and -20°C lower operating limit exclude applications requiring higher current capacity or operation in cold environments. Thermal and electrical environment validation is required.

Q: What is the impact of shell finish differences (Tin vs. Nickel vs. Tin-Nickel plating)? A: Shell finish affects corrosion resistance, contact longevity, and environmental durability. Tin plating is cost-effective for standard environments. Nickel plating provides improved corrosion resistance in aggressive environments. Tin-Nickel plating offers balanced performance between corrosion protection and cost. Application environment (humidity, temperature cycling, chemical exposure) determines optimal finish selection.

Q: Are substitute parts available from multiple manufacturers for redundancy? A: Yes. The part list includes suppliers from Amphenol ICC (L77DCH37STRM5, D37S24A4GX00LF, D37S24A4PL00LF, DC37S364TLF), NorComp Inc. (172-E37-213R001, 172-E37-213R011), and Assmann WSW Components (A-DF 37 PP/Z). Multi-source qualification provides supply chain flexibility, though electrical and mechanical compatibility confirmation is mandatory prior to design implementation.