L77SDB25SOL2G

Part Overview

The L77SDB25SOL2G is a 25 Position D-Sub Receptacle connector manufactured by Amphenol ICC, featuring female sockets with through-hole solder termination. This connector is actively in production and suitable for applications requiring D-Shaped connector interfaces with 250V rating and 3A current capacity. Alternative models become necessary when specific mechanical features, compliance requirements, or current ratings beyond the L77SDB25SOL2G's specifications are required for the application.

Key Parameters

Parameter	Specification
Manufacturer Part Number	L77SDB25SOL2G
Manufacturer	Amphenol ICC (Commercial Products)
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Shell Size / Layout	3 (DB, B)
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Voltage Rating	250V
Operating Temperature	-55°C to 125°C
Shell Material / Finish	Steel, Tin Plated
Contact Material	Phosphor Bronze
Contact Finish	Gold (Flash)
Flange Feature	Housing/Shell (Unthreaded)
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the L77SDB25SOL2G are organized based on the following critical parameters that define functional interchangeability:

Core Compatibility Parameters:

Connector Type: Receptacle, Female Sockets (all substitutes match)
Number of Positions: 25 (all substitutes match)
Shell Size / Layout: 3 (DB, B) (all substitutes match)
Mounting Type: Through Hole (all substitutes match)
Termination: Solder (all substitutes match)

Differentiation Parameters:

Current Rating: L77SDB25SOL2G is rated 3A; substitute parts are rated 6A (higher capacity)
Voltage Rating: L77SDB25SOL2G is rated 250V; substitute parts are rated 125V or unspecified
Flange Feature: L77SDB25SOL2G has unthreaded housing; substitutes vary with threaded (4-40), screwlock, or M3 options
Manufacturer: Amphenol ICC vs. TE Connectivity AMP Connectors
Series: SD (main part) vs. AMPLIMITE HD-20 or AMPLIMITE HDP-20 (substitutes)
Operating Temperature: L77SDB25SOL2G supports -55°C to 125°C; all substitutes support -55°C to 105°C
RoHS Status: Varying compliance levels (RoHS Compliant, ROHS3 Compliant, RoHS non-compliant)
Dielectric Material: Thermoplastic Glass Filled (main part) vs. Polyester or Thermoplastic (substitutes)

Parameter Comparison

Part Number	Manufacturer	Series	Positions	Current Rating (A)	Voltage Rating (V)	Flange Feature	Operating Temp (°C)	RoHS Status	Dielectric Material
L77SDB25SOL2G	Amphenol ICC	SD	25	3	250	Unthreaded	-55 to 125	RoHS Compliant	Thermoplastic, Glass Filled
1-338315-2	TE Connectivity AMP	AMPLIMITE HDP-20	25	6	—	4-40 Threaded	-55 to 105	ROHS3 Compliant	Polyester, Glass Filled
1-5745967-0	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	4-40 Threaded	-55 to 105	RoHS Compliant	Polyester
1-5745967-4	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	Female Screwlock 4-40	-55 to 105	RoHS Compliant	Polyester
1-5745967-5	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	Female Screwlock 4-40	-55 to 105	RoHS Compliant	Polyester
1-5745967-6	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	Female Screwlock 4-40	-55 to 105	ROHS3 Compliant	Polyester
1-745967-4	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	Female Screwlock 4-40	-55 to 105	RoHS non-compliant	Polyester
2-338315-2	TE Connectivity AMP	AMPLIMITE HDP-20	25	6	—	M3 Threaded	-55 to 105	ROHS3 Compliant	Polyester, Glass Filled
2-5747708-0	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	4-40 Threaded	-55 to 105	ROHS3 Compliant	Thermoplastic
2-747708-0	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	4-40 Threaded	-55 to 105	RoHS non-compliant	Thermoplastic
207828-3	TE Connectivity AMP	AMPLIMITE HD-20	25	6	125	Unthreaded	-55 to 105	RoHS non-compliant	Polyester

Engineering Selection Recommendations

Direct Substitution (Same Flange Configuration): The part 207828-3 shares the unthreaded housing/shell flange feature with the L77SDB25SOL2G. This part supports 6A current rating and 125V voltage rating. It is manufactured by TE Connectivity AMP Connectors in the AMPLIMITE HD-20 series and carries RoHS non-compliant status.

Higher Current Capacity Substitutes (4-40 Threaded Flange): Parts 1-5745967-0, 2-5747708-0, and 2-747708-0 offer 6A current rating with 4-40 threaded flange features. Part 1-5745967-0 and 2-5747708-0 are RoHS-compliant or ROHS3-compliant. Part 2-747708-0 carries RoHS non-compliant status. Voltage ratings are specified at 125V. Operating temperature range is limited to -55°C to 105°C.

Female Screwlock Variants (4-40 Mating Side): Parts 1-5745967-4, 1-5745967-5, and 1-5745967-6 provide 6A current capacity with female screwlock mounting at the mating side. Parts 1-5745967-4 and 1-5745967-5 are RoHS-compliant; 1-5745967-6 is ROHS3-compliant. These variants operate within -55°C to 105°C range at 125V.

HDP-20 Series with Board Lock Feature: Parts 1-338315-2 and 2-338315-2 from the AMPLIMITE HDP-20 series include board lock features. Both are ROHS3-compliant with 6A current rating. Voltage rating is not specified. Part 1-338315-2 uses polyester glass-filled dielectric; 2-338315-2 uses M3 threaded mounting versus 4-40.

Compliance Considerations: For applications requiring RoHS compliance, select from RoHS-compliant or ROHS3-compliant options: 1-5745967-0, 1-5745967-4, 1-5745967-5, 1-5745967-6, 2-5747708-0, 1-338315-2, or 2-338315-2. Parts 1-745967-4, 2-747708-0, and 207828-3 are RoHS non-compliant.

Temperature Derating: The L77SDB25SOL2G supports operation to 125°C. All substitute parts are limited to 105°C maximum. Applications requiring the full -55°C to 125°C range require the original part.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the L77SDB25SOL2G? A: Mechanical interchangeability depends on the flange feature requirement. The L77SDB25SOL2G has an unthreaded housing/shell. Only part 207828-3 shares this configuration. Other substitutes have different flange mounting options (4-40 threaded, female screwlock, or M3 threaded) and require adapter compatibility verification at the board level.

Q: What is the main difference in current rating between the main part and substitutes? A: The L77SDB25SOL2G is rated for 3A continuous current. All listed substitute parts support 6A, providing double the current capacity. This is suitable for applications with higher power requirements.

Q: Does voltage rating differ significantly? A: Yes. The L77SDB25SOL2G is rated 250V, while most TE Connectivity substitutes are rated 125V. Part 1-338315-2 and 2-338315-2 do not specify voltage rating. For applications exceeding 125V, the original L77SDB25SOL2G is required.

Q: Which substitutes are RoHS-compliant? A: RoHS-compliant options include 1-5745967-0, 1-5745967-4, 1-5745967-5, and 2-5747708-0. ROHS3-compliant options include 1-338315-2, 1-5745967-6, and 2-338315-2. Parts 1-745967-4, 2-747708-0, and 207828-3 are not RoHS-compliant.

Q: What packaging options are available for the substitute parts? A: Substitute parts are supplied in Tube, Tray, or Bulk packaging. Packaging selection affects lead times and handling. Verify packaging requirements against your assembly process specifications.

Q: Are all parts manufactured by the same supplier? A: No. The L77SDB25SOL2G is manufactured by Amphenol ICC. All listed substitutes are manufactured by TE Connectivity AMP Connectors. Cross-manufacturer sourcing may impact lead times and qualification documentation requirements.

Q: Can I use a substitute part if my circuit operates at 250V? A: No. Substitute parts are rated at 125V maximum (when specified). The L77SDB25SOL2G at 250V is required for circuits operating above 125V.

Q: What is the temperature operating limit difference? A: The L77SDB25SOL2G operates from -55°C to 125°C. Substitute parts are limited to -55°C to 105°C. For applications requiring the full upper temperature range, the original part is necessary.

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