L77DFCG37SOL2 D-Sub 37 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77DFCG37SOL2 is a 37 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel mount, through-hole solder termination connector features female sockets in a 2-row configuration with shell size 4 (DC, C) layout. The connector is actively produced and maintains RoHS compliance with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent D-Sub 37 position receptacle connectors share the same core electrical and mechanical specifications, including connector style, position count, row configuration, shell size, termination method, and flammability rating. Alternative sources provide design flexibility, supply chain redundancy, and component availability across multiple manufacturers.

Key Parameters

Parameter	Value
Connector Style	D-Sub
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
Material Flammability Rating	UL94 V-0
Contact Type	Signal

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Core Compatibility Criteria:

Connector style must be D-Sub
Connector type must be receptacle with female sockets
Position count must be 37
Row configuration must be 2 rows
Shell size and layout must be 4 (DC, C)
Mounting type must be through-hole
Termination method must be solder
Material flammability rating must be UL94 V-0
Contact type must be signal

All substitute parts listed meet these mandatory criteria. Variations in secondary parameters such as flange feature design, contact finish thickness, voltage rating, current rating, and operating temperature range do not disqualify substitution but are documented for application-specific evaluation.

Parameter Comparison

Parameter	L77DFCG37SOL2 (Amphenol ICC)	09644127235 (HARTING)	1-5747301-4 (TE Connectivity)	1-5747301-6 (TE Connectivity)	5207829-4 (TE Connectivity)	5745059-4 (TE Connectivity)	5745079-4 (TE Connectivity)	5745079-6 (TE Connectivity)	5747301-2 (TE Connectivity)	5747301-7 (TE Connectivity)	5747301-8 (TE Connectivity)
Connector Style	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub
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
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
Contact Type	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal
Current Rating (Amps)	7.5A	7.5A	6A	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	100V	125V	125V	125V	125V	125V	125V	125V	125V	125V
Operating Temperature	-55°C ~ 155°C	-20°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
Contact Finish	Gold	Not Specified	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are actively produced and maintain UL94 V-0 flammability compliance. Selection between equivalent parts is based on the following factors:

RoHS Compliance Status:

ROHS3 Compliant parts: 09644127235, 1-5747301-4, 1-5747301-6, 5745079-4, 5747301-7
RoHS Compliant parts: L77DFCG37SOL2, 5745059-4, 5745079-6, 5747301-2, 5747301-8

REACH Compliance Status:

REACH Affected: 5745059-4, 5745079-6, 5747301-7, 5747301-8
REACH Unaffected: 1-5747301-6, 09644127235
Vendor Undefined: 1-5747301-4, 5207829-4, 5747301-2

Electrical Performance Considerations: The L77DFCG37SOL2 provides higher current rating (7.5A) and voltage rating (300V) compared to TE Connectivity AMPLIMITE HD-20 series alternatives (6A, 125V). HARTING 09644127235 provides 7.5A current rating but operates at 100V maximum voltage.

Temperature Operating Range: The L77DFCG37SOL2 operates across -55°C to 155°C. HARTING 09644127235 operates -20°C to 125°C. TE Connectivity alternatives operate -55°C to 105°C. Application temperature requirements determine suitability.

Inventory Availability: TE Connectivity 5747301-8 maintains the highest inventory level (32,900 units). L77DFCG37SOL2 maintains 782 units in stock.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity AMPLIMITE HD-20 series connectors directly replace the L77DFCG37SOL2?

A: TE Connectivity parts meet all core substitution criteria: 37 position D-Sub receptacle, 2-row configuration, shell size 4 (DC, C), through-hole solder termination, and UL94 V-0 rating. However, the L77DFCG37SOL2 supports higher voltage (300V vs. 125V) and current (7.5A vs. 6A) ratings. Substitution is valid when application requirements do not exceed TE Connectivity electrical specifications.

Q: What is the difference between flange feature variations in the substitute parts?

A: Flange feature variations include board-side mounting (M3 or 4-40 threaded), mating-side female screwlock (4-40), and housing/shell configurations (threaded or unthreaded). These variations affect mechanical mounting and panel integration but do not impact electrical compatibility. Selection depends on mechanical installation requirements.

Q: Is the HARTING 09644127235 suitable for high-temperature applications?

A: The HARTING 09644127235 operates within -20°C to 125°C temperature range. Applications requiring operation below -20°C or above 125°C require the L77DFCG37SOL2 (-55°C to 155°C) or TE Connectivity alternatives (-55°C to 105°C).

Q: What packaging formats are available for these substitute parts?

A: L77DFCG37SOL2 is supplied in tray packaging. HARTING 09644127235 is supplied in bulk packaging. TE Connectivity alternatives are supplied in tube packaging. Packaging format affects handling, storage, and component dispensing processes.

Q: Are all substitute parts RoHS compliant?

A: All listed parts are RoHS compliant. Specific compliance levels vary: some are RoHS Compliant (standard), others are ROHS3 Compliant (enhanced). Both compliance levels are acceptable for RoHS-regulated applications.

Q: What contact material differences exist between the main part and substitutes?

A: The L77DFCG37SOL2 uses copper alloy contacts. TE Connectivity alternatives use phosphor bronze contacts. HARTING 09644127235 contact material is not specified. Both copper alloy and phosphor bronze are standard D-Sub contact materials with equivalent signal integrity performance.

Q: Can I mix and match connector halves from different manufacturers?

A: D-Sub connectors from different manufacturers are mechanically and electrically compatible when they share identical shell size (4 DC, C), position count (37), and row configuration (2). Mating between L77DFCG37SOL2 receptacles and plugs from TE Connectivity or HARTING is mechanically feasible. Verify contact alignment and mating force specifications for specific applications.

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