L777DFC37POL2 Equivalent & Substitute Parts

Part Overview

The L777DFC37POL2 is a 37-position D-Sub plug connector manufactured by Amphenol ICC (Commercial Products) in the DF series. This panel mount, through-hole solder connector features male pins with a 4 (DC, C) shell size layout and is designed for signal applications. The connector is actively produced and maintains 733 units in current inventory stock.

Substitute parts are identified when equivalent D-Sub plug connectors share the same core electrical and mechanical specifications, including connector type, position count, shell size, termination method, and operating parameters. Alternative sources provide equivalent functionality for applications requiring component interchangeability or supply chain flexibility.

Key Parameters

Parameter	L777DFC37POL2 Specification
Connector Type	Plug, Male Pins
Number of Positions	37
Number of Rows	2
Shell Size, Connector Layout	4 (DC, C)
Mounting Type	Panel Mount, Through Hole
Termination	Solder
Contact Type	Signal
Current Rating	7.5A
Voltage Rating	300V
Operating Temperature Range	-55°C ~ 125°C
Contact Material	Brass
Contact Finish	Gold
Shell Material, Finish	Steel, Tin Plated
Flange Feature	Housing/Shell (Unthreaded)
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the L777DFC37POL2 are identified based on strict equivalence in the following core parameters:

Primary Matching Criteria:

Connector type: Plug, Male Pins
Position count: 37 positions
Row configuration: 2 rows
Shell size and layout: 4 (DC, C)
Termination method: Solder
Contact type: Signal
Contact material: Brass
Contact finish: Gold
Flange feature: Housing/Shell configuration
Material flammability: UL94 V-0

Secondary Considerations:

Mounting type: Through Hole (all substitutes)
Operating temperature range: -55°C minimum and 125°C maximum (all substitutes meet or exceed)
Moisture sensitivity: MSL 1 (Unlimited) for all parts
ECCN and HTSUS classifications: Identical across all parts

Electrical Parameter Variations: Substitute parts from TE Connectivity AMP Connectors series (AMPLIMITE HD-20 and HDP-20) operate at reduced current and voltage ratings compared to the main part. The L777DFC37POL2 is rated at 7.5A and 300V, while all substitute parts are rated at 6A and 125V. These substitutes are suitable for applications within their electrical specifications.

Compliance Variations: RoHS compliance status varies among substitutes. ROHS3 compliant parts are available. One substitute (208009-1) is RoHS non-compliant and REACH Affected. REACH status varies across the substitute list.

Parameter Comparison

Parameter	L777DFC37POL2	2-5747705-1	208009-1	5208009-1	5208009-3	5745074-1	5745074-2	5745074-4	5747375-2	5747375-8	745054-4
Manufacturer	Amphenol ICC	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Connector Type	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins
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	Panel Mount, 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	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Current Rating (Amps)	7.5A	6A	6A	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	125V	125V	125V	125V	125V	125V	125V	125V	125V	125V
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
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
Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
Moisture Sensitivity Level	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

Primary Substitutes (ROHS3 Compliant, REACH Unaffected):

The following parts are recommended as primary substitutes based on active product status, ROHS3 compliance, and REACH unaffected status:

5208009-1: AMPLIMITE HD-20 series, 1179 units in stock
5208009-3: AMPLIMITE HD-20 series, 772 units in stock
5745074-4: AMPLIMITE HD-20 series, 1128 units in stock
5747375-2: AMPLIMITE HD-20 series, 1547 units in stock
5747375-8: AMPLIMITE HD-20 series, 1347 units in stock

These parts maintain active product status and meet current regulatory compliance requirements.

Secondary Substitutes (ROHS3 Compliant, REACH Affected):

5745074-1: AMPLIMITE HD-20 series, 903 units in stock
5745074-2: AMPLIMITE HD-20 series, 1629 units in stock
745054-4: AMPLIMITE HD-20 series, 624 units in stock

These parts are ROHS3 compliant but carry REACH Affected status.

Alternative Substitute (HDP-20 Series):

2-5747705-1: AMPLIMITE HDP-20 series, 1481 units in stock, ROHS3 compliant, REACH unaffected

Non-Recommended Substitute:

208009-1: RoHS non-compliant and REACH Affected status disqualifies this part for new designs requiring current regulatory compliance.

Electrical Derating Consideration:

All TE Connectivity substitutes operate at 6A and 125V compared to the L777DFC37POL2 specification of 7.5A and 300V. Applications must operate within these reduced electrical parameters. The operating temperature range of substitute parts extends to 105°C maximum, compared to 125°C for the main part.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity AMPLIMITE HD-20 series parts directly replace the L777DFC37POL2?

A: Direct mechanical and electrical substitution is possible for applications operating within 6A current and 125V voltage specifications. The connector geometry, pin count, shell size, and termination method are equivalent. Applications requiring the full 7.5A or 300V ratings of the L777DFC37POL2 cannot use these substitutes.

Q: What is the difference between the AMPLIMITE HD-20 and HDP-20 series?

A: Both series provide 37-position D-Sub plug connectors with equivalent electrical and mechanical specifications. The HDP-20 series (2-5747705-1) is available as an alternative source. All parts maintain the same shell size, pin configuration, and termination method.

Q: Are there differences in flange features among the substitute parts?

A: Yes. The L777DFC37POL2 features an unthreaded housing/shell flange. Substitute parts vary between unthreaded housing/shell, mating side female screwlock (4-40), and housing/shell (4-40) configurations. Flange feature selection depends on the specific mounting and mating requirements of the application.

Q: What is the significance of the contact finish thickness specification?

A: The L777DFC37POL2 specifies 30.0µin (0.76µm) contact finish thickness. Substitute parts specify either flash thickness or no thickness data. Flash plating provides minimal gold coverage. For applications requiring specific contact resistance or durability characteristics, contact finish thickness should be evaluated against application requirements.

Q: Do all substitute parts have the same dielectric material?

A: No. The L777DFC37POL2 uses thermoplastic, glass-filled dielectric material. Most substitute parts use polyester dielectric material. One substitute (2-5747705-1) uses thermoplastic dielectric. Dielectric material affects electrical properties and environmental performance.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant status?

A: RoHS Compliant indicates compliance with the original Restriction of Hazardous Substances directive. ROHS3 Compliant indicates compliance with the updated RoHS 3 directive (2015/863/EU), which includes additional restricted substances. ROHS3 compliance is required for new designs in most markets.

Q: Are there inventory differences among the substitute parts?

A: Yes. Inventory levels vary from 624 units (745054-4) to 1629 units (5745074-2). The main part L777DFC37POL2 has 733 units in stock. Substitute availability should be considered for supply chain planning.

Q: What does REACH Affected status mean?

A: REACH Affected status indicates that the part contains substances of very high concern (SVHC) listed under the REACH regulation (EC 1907/2006). Parts with REACH Unaffected or Vendor Undefined status may be preferred for applications in regulated markets.

Q: Can the L777DFC37POL2 be used in applications requiring ROHS3 compliance?

A: The L777DFC37POL2 is RoHS Compliant but not explicitly listed as ROHS3 Compliant. For new designs requiring ROHS3 compliance, ROHS3 compliant substitutes (5208009-1, 5208009-3, 5745074-4, 5747375-2, 5747375-8, 2-5747705-1, or 745054-4) are recommended.

Q: What is the operating temperature derating for substitute parts?

A: Substitute parts operate from -55°C to 105°C, compared to the L777DFC37POL2 range of -55°C to 125°C. Applications requiring operation above 105°C cannot use the substitute parts.

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