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L77TSCH37SOL2
Part Overview
The L77TSCH37SOL2 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets in a vertical through-hole configuration with solder termination. The product is classified as Active and is available with 1,150 units in stock.
Finding equivalent and substitute parts becomes necessary when original components are unavailable, specific performance characteristics are required for particular applications, or alternative sourcing is needed to optimize cost and supply chain efficiency.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | L77TSCH37SOL2 |
| Manufacturer | Amphenol ICC (Commercial Products) |
| Category | D-Sub, D-Shaped Connectors |
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 37 |
| Shell Size / Layout | 4 (DC, C) |
| Mounting Type | Through Hole |
| Termination | Solder |
| Current Rating | 5A |
| Voltage Rating | 600V |
| Operating Temperature | -55°C ~ 125°C |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the L77TSCH37SOL2 are selected based on strict alignment with the following critical parameters:
- Connector Type & Position: All substitutes maintain 37-position D-Sub receptacle configuration with female sockets
- Shell Size & Layout: Shell size 4 (DC, C) is maintained across all substitute options
- Number of Rows: Two-row configuration consistent across all alternatives
- Contact Finish & Material: Gold contact finish with flash thickness maintained for signal integrity
- Flammability Rating: UL94 V-0 material classification maintained for safety compliance
- Termination Method: Solder termination consistent across all variants
- Electrical Ratings: Current rating (5A) and voltage compatibility (300V minimum) maintained
Substitutes vary in mounting type, shell material finish, dielectric material, and operating temperature ranges. These variations do not compromise functional interchangeability within the specified electrical and mechanical envelope.
Parameter Comparison
| Parameter | L77TSCH37SOL2 | 172-E37-213R001 | 172-E37-213R011 | 172-E37-213R031 | 172-E37-213R911 | A-DF 37 PP/Z | D37S24A4GX00LF | D37S24A4PL00LF | DC37S364TLF |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Amphenol ICC (Commercial) | NorComp Inc. | NorComp Inc. | NorComp Inc. | NorComp Inc. | Assmann WSW | Amphenol ICC (FCI) | Amphenol ICC (FCI) | Amphenol ICC (FCI) |
| Connector Type | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female | Receptacle, Female |
| Positions / Layout | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) | 37 / 4 (DC, C) |
| Mounting Type | Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Panel Mount, Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Current Rating | 5A | 5A | 5A | 5A | 5A | 3A | 5A per Contact | 5A per Contact | 5A per Contact |
| Voltage Rating | 600V | Not Specified | Not Specified | Not Specified | Not Specified | 250V | 300V | 300V | 300V |
| Operating Temperature | -55°C ~ 125°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -50°C ~ 100°C | -20°C ~ 105°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Shell Material / Finish | Steel, Tin Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Nickel Plated | Steel, Tin Plated | Steel, Tin-Nickel Plated | Steel, Tin-Nickel Plated | Steel, Tin Plated |
| Contact Finish | Gold Flash | Gold Flash | Gold Flash | Gold Flash | Gold Flash | Gold Flash | Gold Flash | Gold Flash | Gold Flash |
| Contact Material | Copper Alloy | Brass | Brass | Brass | Brass | Copper Alloy | Phosphor Bronze | Phosphor Bronze | Copper Alloy |
| Dielectric Material | Thermoplastic, Glass Filled | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polyamide (PA6T), Nylon 6T | Polybutylene Terephthalate (PBT), Glass Filled | Polybutylene Terephthalate (PBT) | Polybutylene Terephthalate (PBT) | Thermoplastic |
| UL94 Flammability | V-0 | V-0 | V-0 | V-0 | V-0 | V-0 | V-0 | V-0 | Not Specified |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | RoHS Compliant |
| MSL Rating | 1 (Unlimited) | Not Applicable | Not Applicable | Not Applicable | Not Applicable | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Full Compatibility (Primary Substitutes):
D37S24A4GX00LF and D37S24A4PL00LF from Amphenol ICC (FCI) Delta D series maintain complete parameter alignment with the L77TSCH37SOL2 for operating temperature range (-55°C ~ 125°C), current rating (5A per contact), and RoHS compliance status. These alternatives support identical electrical performance envelopes.
DC37S364TLF from Amphenol ICC (FCI) D series offers equivalent electrical ratings and operating temperature range with RoHS Compliant status. This option provides direct functional substitution for through-hole solder applications.
Functional Substitutes with Parameter Variance:
172-E37-213R001, 172-E37-213R011, 172-E37-213R031, and 172-E37-213R911 from NorComp Inc. (172-E series) provide D-Sub 37-position receptacle functionality with ROHS3 Compliant certification. These parts accommodate panel mount applications with board-side or mating-side flange mounting options. Operating temperature range limitation (-50°C ~ 100°C) and unspecified voltage rating require application-specific validation.
172-E37-213R911 additionally features board lock functionality for secure mating connection.
Limited Substitution Consideration:
A-DF 37 PP/Z from Assmann WSW Components maintains through-hole mounting and solder termination with ROHS3 compliance. Current rating (3A) falls below the primary specification (5A), restricting this option to lower-current signal applications. Operating temperature range (-20°C ~ 105°C) and voltage rating (250V) further limit applicability.
Frequently Asked Questions (FAQ)
Q: What parameters determine if a D-Sub 37-position connector can directly substitute for the L77TSCH37SOL2?
A: Direct substitution requires matching the connector type (37-position receptacle, female sockets), shell size and layout (4, DC, C configuration), number of rows (2), termination method (solder), and maintaining minimum electrical ratings (5A current, 600V voltage). The L77TSCH37SOL2 specifically requires through-hole mounting configuration.
Q: Can NorComp 172-E37 series connectors replace the L77TSCH37SOL2 in all applications?
A: NorComp 172-E37 series connectors offer functional D-Sub 37-position receptacle configuration with equivalent gold flash contacts and UL94 V-0 flammability rating. However, these parts feature panel mount capability rather than through-hole only mounting, operate within a narrower temperature range (-50°C ~ 100°C versus -55°C ~ 125°C), and have unspecified voltage ratings. Application requirements determine compatibility.
Q: What is the significance of the voltage rating difference between the L77TSCH37SOL2 (600V) and substitute options?
A: The L77TSCH37SOL2 carries a 600V voltage rating specification. NorComp 172-E37 series parts do not specify voltage ratings. Amphenol ICC (FCI) alternatives specify 300V ratings. Voltage rating indicates the maximum potential difference the connector tolerates. Application-specific voltage requirements must be compared against connector specifications.
Q: How do shell material finishes affect connector selection?
A: The L77TSCH37SOL2 uses steel with tin plating for the shell. Substitute options employ tin plating, nickel plating, or tin-nickel plating finishes. These finishes provide corrosion resistance and are functionally equivalent for signal transmission. Material finish selection may be driven by environmental exposure conditions, cost considerations, or specific system requirements.
Q: What is the difference between through-hole and panel mount configuration in D-Sub connectors?
A: Through-hole mounting (L77TSCH37SOL2) places connector contacts perpendicular to the circuit board for direct solder insertion into through-board vias. Panel mount configuration (NorComp 172-E37 series) allows mounting to panel cutouts with board-side or mating-side flange attachment. These configurations are mechanically distinct and may not be interchangeable depending on board layout and enclosure design.
Q: Why do some substitutes list unspecified voltage ratings?
A: NorComp 172-E37 series connectors provide functional D-Sub receptacle connections without published voltage rating specifications. This does not indicate inadequate voltage performance. Application requirements and system design specifications determine whether unspecified voltage ratings present evaluation challenges.
Q: Can the A-DF 37 PP/Z from Assmann WSW be used as a substitute despite the 3A current rating?
A: The A-DF 37 PP/Z supports 3A current rating versus the L77TSCH37SOL2's 5A specification. Substitution is limited to applications where individual contact current requirements do not exceed 3A. Higher-current applications require alternatives maintaining 5A or greater current ratings.
Q: Are all substitute parts RoHS compliant?
A: All listed substitute parts carry either RoHS Compliant or ROHS3 Compliant certification. ROHS3 represents the current revision of RoHS compliance standards. Both compliance levels meet RoHS requirements and are suitable for restricted substance-free applications.
Q: What is the significance of contact material differences (copper alloy versus brass versus phosphor bronze)?
A: Contact material affects electrical conductivity, wear resistance, and spring characteristics. Copper alloy, brass, and phosphor bronze all provide reliable signal transmission in D-Sub applications. Material selection impacts mechanical durability under repeated mating cycles and cost considerations. All materials listed maintain functional signal connectivity.
Q: Do operating temperature range differences affect substitution decisions?
A: The L77TSCH37SOL2 operates -55°C ~ 125°C. NorComp alternatives operate -50°C ~ 100°C. Applications requiring operation at temperatures below -50°C or above 100°C are restricted to L77TSCH37SOL2, D37S24A4GX00LF, D37S24A4PL00LF, or DC37S364TLF. Environmental operating conditions must align with connector temperature specifications.
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