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L77DFC37SOL2RM8 D-Sub Receptacle 37-Position Panel Mount Connector
Part Overview
The L77DFC37SOL2RM8 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC for panel mount applications with solder termination. This connector is actively produced and stocked with 944 units available. Alternative part selection becomes necessary when specific mounting configurations, mounting types (through hole versus panel mount), flange styles, or contact material specifications are required for particular application requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Style | D-Sub |
| Connector Type | Receptacle, Female Sockets |
| Number of Positions | 37 |
| Number of Rows | 2 |
| Shell Size | 4 (DC, C) |
| Mounting Type | Panel Mount, Through Hole |
| Flange Feature | Housing/Shell (Unthreaded) |
| Termination | Solder |
| Voltage Rating | 300V |
| Current Rating | 7.5A |
| Operating Temperature | -55°C to 155°C |
| Contact Finish | Gold (20.0µin / 0.51µm) |
| Shell Material | Steel, Tin Plated |
| Contact Material | Copper Alloy |
| Dielectric Material | Thermoplastic, Glass Filled |
| RoHS Status | RoHS Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution eligibility for the L77DFC37SOL2RM8 is determined by the following mandatory parameters: 37-position connector configuration, D-Sub receptacle style, female socket contact type, Shell Size 4 (DC, C), solder termination, and UL94 V-0 flammability rating. All listed substitute parts meet these core requirements.
Substitutes originate from TE Connectivity AMP Connectors within the AMPLIMITE HD-20 series. Critical differences exist in mounting type (all substitutes are through hole only, versus the original panel mount configuration), flange features (screw-lock mechanisms or housing-mounted configurations), contact materials (phosphor bronze versus copper alloy), and electrical ratings (6A current at 125V versus 7.5A at 300V for the original).
The following key parameter variations determine engineering compatibility:
- Mounting Type: Through Hole (substitutes) versus Panel Mount, Through Hole (original)
- Flange Feature: Mating Side Female Screwlock (4-40), Housing/Shell Unthreaded, or Housing/Shell (4-40)
- Contact Material: Phosphor Bronze (substitutes) versus Copper Alloy (original)
- Voltage Rating: 125V (substitutes) versus 300V (original)
- Current Rating: 6A (substitutes) versus 7.5A (original)
- Operating Temperature: -55°C to 105°C (substitutes) versus -55°C to 155°C (original)
- Dielectric Material: Polyester (substitutes) versus Thermoplastic, Glass Filled (original)
Parameter Comparison
| Part Number | Manufacturer | Connector Type | Positions | Mounting Type | Flange Feature | Contact Material | Voltage Rating | Current Rating | Temp Range | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|
| L77DFC37SOL2RM8 | Amphenol ICC | Receptacle, Female | 37 | Panel Mount, Through Hole | Housing/Shell (Unthreaded) | Copper Alloy | 300V | 7.5A | -55°C to 155°C | RoHS Compliant | 944 Pcs |
| 1-5747301-4 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | ROHS3 Compliant | 3446 Pcs |
| 1-5747301-6 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | ROHS3 Compliant | 1029 Pcs |
| 5745059-4 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Housing/Shell (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | RoHS Compliant | 2769 Pcs |
| 5745079-4 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | ROHS3 Compliant | 1481 Pcs |
| 5745079-6 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | RoHS Compliant | 3603 Pcs |
| 5747301-2 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Housing/Shell (Unthreaded) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | RoHS Compliant | 1660 Pcs |
| 5747301-7 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Housing/Shell (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | ROHS3 Compliant | 3673 Pcs |
| 5747301-8 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Housing/Shell (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | RoHS Compliant | 32900 Pcs |
| 5787685-1 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | RoHS Compliant | 1189 Pcs |
| 745079-4 | TE Connectivity | Receptacle, Female | 37 | Through Hole | Mating Side, Female Screwlock (4-40) | Phosphor Bronze | 125V | 6A | -55°C to 105°C | Not applicable | 1579 Pcs |
Engineering Selection Recommendations
All substitute parts are active-status, production components. RoHS compliance varies across the substitute family: parts 1-5747301-4, 5745079-4, 5747301-7, and 745079-4 carry ROHS3 or not-applicable designations, while 5745059-4, 5745079-6, 5747301-2, 5747301-8, and 5787685-1 maintain full RoHS Compliant status matching the original part.
Part 5747301-8 offers the highest inventory availability at 32,900 units with RoHS Compliant certification and unthreaded housing-shell flange configuration. Parts 1-5747301-4 and 5745079-6 provide alternative availability levels above 3,400 units.
Substitution requires evaluation of mounting configuration differences. The original part supports panel mount installations; all substitute options are through-hole only. Flange type selection (female screwlock, unthreaded housing, or 4-40 housing-mounted) must align with intended mechanical assembly and enclosure requirements.
Electrical parameter reduction is inherent to all substitutes: voltage derating from 300V to 125V and current reduction from 7.5A to 6A must be confirmed within the application circuit design. Operating temperature maximum reduction from 155°C to 105°C applies across the entire substitute family.
Frequently Asked Questions (FAQ)
Q: Can TE Connectivity AMPLIMITE HD-20 series parts directly replace the Amphenol L77DFC37SOL2RM8?
A: Direct replacement is not applicable. The Amphenol part is panel-mount configured while all TE substitutes are through-hole only. Mechanical assembly changes are required. Additionally, all substitutes operate at lower electrical ratings (125V, 6A versus 300V, 7.5A) and reduced maximum temperature (105°C versus 155°C).
Q: What are the critical compatibility parameters between the main part and substitute options?
A: Core compatibility parameters are: 37-position D-Sub receptacle configuration, female socket contact type, Shell Size 4 (DC, C), solder termination, and UL94 V-0 material rating. All parts in this list meet these specifications. Variations occur in mounting type, flange configuration, contact material (copper alloy versus phosphor bronze), dielectric composition, and electrical/thermal ratings.
Q: Which substitute part offers the best inventory availability?
A: Part 5747301-8 from TE Connectivity provides the highest stock level at 32,900 units, with RoHS Compliant certification, through-hole mounting, and housing-shell (4-40) flange configuration.
Q: How do flange configurations differ among the substitute parts?
A: Substitutes are offered with three flange types: Mating Side Female Screwlock (4-40) fastening found on parts 1-5747301-4, 1-5747301-6, 5745079-4, 5745079-6, 5787685-1, and 745079-4; Housing/Shell Unthreaded configuration on part 5747301-2; and Housing/Shell (4-40) mounting on parts 5745059-4, 5747301-7, and 5747301-8. Selection depends on enclosure design and fastening methodology.
Q: Is the phosphor bronze contact material in substitutes equivalent to the original copper alloy contacts?
A: Phosphor bronze and copper alloy are distinct contact materials with different mechanical and electrical properties. Both materials are used in D-Sub connectors; however, the change in contact material is a specification variation requiring engineering assessment relative to the original design intent and circuit requirements.
Q: What packaging format do substitute parts use?
A: All TE Connectivity substitute parts are packaged in tube format, compared to the tray packaging of the original L77DFC37SOL2RM8. Procurement and handling processes may require adjustment for different packaging specifications.
Q: Are all substitute parts equally compliant with RoHS regulations?
A: RoHS compliance status differs across the substitute family. Parts designated ROHS3 Compliant (1-5747301-4, 5745079-4, 5747301-7) and RoHS Compliant (5745059-4, 5745079-6, 5747301-2, 5747301-8, 5787685-1) satisfy RoHS requirements; part 745079-4 is marked as Not applicable. Regulatory requirements for the end application determine which compliance status is acceptable.
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