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Equivalent & Substitute Parts for L77SDC37SOL2G
Part Overview
The L77SDC37SOL2G is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with vertical through-hole solder termination. This connector operates across a temperature range of -55°C to 125°C with a 250V voltage rating and 3A current capacity. The connector is housed in a steel, tin-plated shell with gold-flashed contacts and is classified as UL94 V-0 flammable material. The part maintains active product status and is RoHS compliant with MSL 1 rating.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative sourcing reduces lead times, or when design requirements permit operation within the electrical and mechanical parameters of equivalent alternatives. TE Connectivity AMP Connectors AMPLIMITE HD-20 series receptacles provide functional equivalency across the 37-position D-Sub receptacle category while maintaining core mechanical compatibility and electrical performance within specified operating parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 37 |
| Number of Rows | 2 |
| Shell Size, Connector Layout | 4 (DC, C) |
| Mounting Type | Through Hole |
| Termination | Solder |
| Contact Type | Signal |
| Shell Material, Finish | Steel, Tin Plated |
| Contact Finish | Gold |
| Material Flammability Rating | UL94 V-0 |
| Operating Temperature Range | -55°C to 125°C |
| Voltage Rating | 250V |
| Current Rating | 3A |
| Contact Material | Phosphor Bronze |
| RoHS Status | RoHS Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the L77SDC37SOL2G is determined by strict equivalency across the following critical parameters:
Mandatory Matching Parameters:
- Connector Type: Receptacle, Female Sockets
- Number of Positions: 37
- Number of Rows: 2
- Shell Size, Connector Layout: 4 (DC, C)
- Mounting Type: Through Hole
- Termination: Solder
- Contact Type: Signal
- Contact Material: Phosphor Bronze
- Contact Finish: Gold
- Material Flammability Rating: UL94 V-0
- Color: Black
Allowable Variation Parameters:
- Voltage Rating: Substitute parts rated at 125V are acceptable for applications requiring 250V operation, as 125V represents a reduced but compatible specification
- Current Rating: Substitute parts rated at 6A exceed the 3A requirement and are acceptable for applications requiring 3A
- Operating Temperature Range: Substitute parts rated -55°C to 105°C are acceptable for applications requiring -55°C to 125°C, as the lower upper limit represents a constrained but compatible specification
- Contact Finish Thickness: Variations between Flash and 30.0µin (0.76µm) are acceptable
- Flange Feature: Housing/Shell configurations with different threading specifications (Unthreaded, 4-40) are acceptable based on application requirements
- Dielectric Material: Polyester substitutes for Thermoplastic, Glass Filled
- Shell Material Finish: Unspecified finish is acceptable where Steel, Tin Plated is specified
All substitute parts maintain active product status, UL94 V-0 flammability compliance, RoHS compliance, and MSL 1 rating.
Parameter Comparison
| Parameter | L77SDC37SOL2G (Amphenol ICC) | 1-5747301-4 (TE) | 1-5747301-6 (TE) | 2-5747709-0 (TE) | 5207829-4 (TE) | 5745059-4 (TE) | 5745079-4 (TE) | 5745079-6 (TE) | 5747301-2 (TE) | 5747301-7 (TE) | 5747301-8 (TE) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Amphenol ICC | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity | TE Connectivity |
| Series | SD | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 | AMPLIMITE HD-20 |
| Connector Type | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets | Receptacle, Female Sockets |
| Number of Positions | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 |
| Number of Rows | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Shell Size, Connector Layout | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) | 4 (DC, C) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Termination | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder | Solder |
| Contact Type | Signal | Signal | Signal | Signal | Signal | Signal | Signal | Signal | Signal | Signal | Signal |
| Contact Material | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze | Phosphor Bronze |
| Contact Finish | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold | Gold |
| Contact Finish Thickness | Flash | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | 30.0µin (0.76µm) | Flash | 30.0µin (0.76µm) |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 |
| Current Rating (Amps) | 3A | 6A | 6A | 6A | 6A | 6A | 6A | 6A | 6A | 6A | 6A |
| Voltage Rating | 250V | 125V | 125V | 125V | 125V | 125V | 125V | 125V | 125V | 125V | 125V |
| Operating Temperature Range | -55°C to 125°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C | -55°C to 105°C |
| Color | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black | Black |
| Dielectric Material | Thermoplastic, Glass Filled | Polyester | Polyester | Polyester | Polyester | Polyester | Polyester | Polyester | Polyester | Polyester | Polyester |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and comply with UL94 V-0 flammability requirements and RoHS standards. Selection among substitute parts should be based on the following criteria:
Flange Feature Compatibility:
- Parts with Housing/Shell (Unthreaded) configuration: 5207829-4, 5747301-2
- Parts with Housing/Shell (4-40) configuration: 2-5747709-0, 5745059-4, 5747301-7, 5747301-8
- Parts with Mating Side, Female Screwlock (4-40) configuration: 1-5747301-4, 1-5747301-6, 5745079-4, 5745079-6
Compliance Variants:
- ROHS3 Compliant parts: 1-5747301-4, 1-5747301-6, 5207829-4, 5745079-4, 5747301-7
- RoHS Compliant parts: 2-5747709-0, 5745059-4, 5745079-6, 5747301-2, 5747301-8
REACH Status Considerations:
- REACH Affected: 2-5747709-0, 5745059-4, 5745079-4, 5745079-6, 5747301-7, 5747301-8
- REACH Unaffected: 1-5747301-6
- Vendor Undefined: 1-5747301-4, 5207829-4, 5747301-2
Inventory Availability:
- Highest inventory: 5747301-8 (32,900 pcs), 5745079-6 (3,603 pcs), 1-5747301-4 (3,446 pcs)
- Moderate inventory: 5747301-7 (3,673 pcs), 2-5747709-0 (1,537 pcs), 5745059-4 (2,769 pcs)
- Lower inventory: 5745079-4 (1,481 pcs), 5747301-2 (1,660 pcs), 1-5747301-6 (1,029 pcs), 5207829-4 (756 pcs)
All substitute parts operate within the electrical and mechanical constraints of the L77SDC37SOL2G application space.
Frequently Asked Questions (FAQ)
Q: Can TE Connectivity AMPLIMITE HD-20 series parts substitute for the Amphenol ICC L77SDC37SOL2G?
A: Yes. All listed TE Connectivity parts maintain the same 37-position D-Sub receptacle configuration, female socket contact type, through-hole solder termination, and signal contact specification. Mechanical compatibility is established through identical shell size (4 DC, C), mounting type, and contact material (phosphor bronze with gold finish).
Q: What is the significance of the voltage rating difference between the L77SDC37SOL2G (250V) and substitute parts (125V)?
A: The L77SDC37SOL2G is rated for 250V operation. Substitute parts rated at 125V represent a reduced voltage specification. Applications requiring 250V operation must not use 125V-rated substitutes. Applications operating at or below 125V may use either the original part or substitute parts without electrical constraint.
Q: What is the significance of the operating temperature range difference?
A: The L77SDC37SOL2G operates from -55°C to 125°C. All substitute parts operate from -55°C to 105°C. Applications requiring operation above 105°C must use the original L77SDC37SOL2G. Applications operating within the -55°C to 105°C range may use substitute parts without thermal constraint.
Q: What is the significance of the current rating difference?
A: The L77SDC37SOL2G is rated for 3A per contact. All substitute parts are rated for 6A per contact. The higher current rating of substitute parts exceeds the original specification and presents no constraint for applications requiring 3A operation.
Q: How do flange feature differences affect substitution?
A: Flange features determine mechanical mounting configuration. Housing/Shell (Unthreaded) provides basic shell mounting. Housing/Shell (4-40) provides threaded mounting with 4-40 fasteners. Mating Side, Female Screwlock (4-40) provides screwlock engagement at the mating interface. Selection depends on the mechanical mounting requirements of the application. Parts with different flange features are not interchangeable without mechanical redesign.
Q: What is the difference between Flash and 30.0µin (0.76µm) contact finish thickness?
A: Both specifications provide gold contact finish. Flash thickness represents a minimal gold coating applied to the contact surface. 30.0µin (0.76µm) represents a thicker, more durable gold plating. Both finishes are acceptable for signal contact applications. The thicker plating provides enhanced wear resistance in high-cycle mating applications.
Q: Are there differences in dielectric material between the original part and substitutes?
A: The L77SDC37SOL2G uses Thermoplastic, Glass Filled dielectric material. All substitute parts use Polyester dielectric material. Both materials meet UL94 V-0 flammability requirements and maintain electrical insulation properties within the operating temperature ranges specified for each part.
Q: What packaging differences exist between the original part and substitutes?
A: The L77SDC37SOL2G is supplied in Tray packaging. All substitute parts are supplied in Tube packaging. Packaging differences do not affect electrical or mechanical performance but may impact handling, storage, and inventory management procedures.
Q: Which substitute part has the highest inventory availability?
A: Part number 5747301-8 maintains the highest inventory with 32,900 pieces in stock. This part features Housing/Shell (4-40) flange configuration, Steel Tin Plated shell finish, 30.0µin (0.76µm) contact finish thickness, and RoHS compliance with REACH Affected status.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts maintain either RoHS Compliant or ROHS3 Compliant status. The original L77SDC37SOL2G is RoHS Compliant. ROHS3 represents an updated compliance designation and is acceptable for applications requiring RoHS compliance.
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