L77TSBH25SOL2

Part Overview

The L77TSBH25SOL2 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC, featuring female sockets with vertical solder termination and board-side mounting. This connector is actively produced and widely used in applications requiring robust, standardized D-Sub connectivity with high reliability. Alternative models become necessary when specific mounting configurations, compliance certifications, environmental operating ranges, or packaging requirements differ from the primary component specification.

Key Parameters

Parameter	Specification
Connector Type	Receptacle, Female Sockets
Number of Positions	25
Number of Rows	2
Shell Size, Connector Layout	3 (DB, B)
Mounting Type	Through Hole
Flange Feature	Board Side (4-40)
Termination	Solder
Shell Material, Finish	Steel, Tin Plated
Contact Finish	Gold
Current Rating (Amps)	5A
Voltage Rating	600V
Operating Temperature	-55°C to 125°C
RoHS Status	RoHS Compliant
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the L77TSBH25SOL2 is permissible when the alternative part maintains core electrical and mechanical compatibility. The critical parameters determining substitutability are:

Connector Configuration: 25-position D-Sub receptacle, female sockets, 2-row layout, shell size 3 (DB, B)
Termination Method: Solder termination required for board assembly compatibility
Mounting Style: Through-hole PCB mounting with flange attachment
Electrical Performance: Current and voltage ratings must meet or exceed the application minimum
Operating Temperature Range: Must encompass the application's required temperature limits
Contact Finish: Gold-plated contacts for signal integrity and corrosion resistance
Compliance: RoHS or ROHS3 compliance status for regulatory alignment

Substitute parts may differ in flange configuration (housing type, screw lock features), shell finish (nickel vs. tin), contact form (stamped vs. machined), dielectric material composition, and packaging, provided the core functional parameters remain compatible with the circuit design and assembly process.

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Mounting Type	Termination	Shell Finish	Contact Finish	Current (A)	Voltage (V)	Temp Range (°C)	RoHS Status
L77TSBH25SOL2	Amphenol ICC	Receptacle, Female Sockets	25	Through Hole	Solder	Steel, Tin Plated	Gold	5	600	-55 to 125	RoHS Compliant
09663516513	HARTING	Receptacle, Female Sockets	25	Through Hole	Solder	Steel	—	6.5	—	-55 to 125	ROHS3 Compliant
1-745967-4	TE Connectivity AMP Connectors	Receptacle, Female Sockets	25	Through Hole	Solder	Steel, Tin Plated	Gold	6	125	-55 to 105	RoHS non-compliant
172-E25-213R001	NorComp Inc.	Receptacle, Female Sockets	25	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Gold	5	—	-50 to 100	ROHS3 Compliant
172-E25-213R011	NorComp Inc.	Receptacle, Female Sockets	25	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Gold	5	—	-50 to 100	ROHS3 Compliant
172-E25-213R031	NorComp Inc.	Receptacle, Female Sockets	25	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Gold	5	—	-50 to 100	ROHS3 Compliant
172-E25-213R911	NorComp Inc.	Receptacle, Female Sockets	25	Panel Mount, Through Hole	Solder	Steel, Nickel Plated	Gold	5	—	-50 to 100	ROHS3 Compliant
2-338315-2	TE Connectivity AMP Connectors	Receptacle, Female Sockets	25	Through Hole	Solder	Steel, Tin Plated	Gold	6	—	-55 to 105	ROHS3 Compliant
5-338315-2	TE Connectivity AMP Connectors	Receptacle, Female Sockets	25	Through Hole	Solder	Steel, Tin Plated	Gold	6	—	-55 to 105	ROHS3 Compliant
5745922-2	TE Connectivity AMP Connectors	Receptacle, Female Sockets	25	Through Hole	Press-Fit	Steel, Tin Plated	Gold	—	—	-55 to 105	ROHS3 Compliant
6-338315-2	TE Connectivity AMP Connectors	Receptacle, Female Sockets	25	Through Hole	Solder	Steel, Tin Plated	Gold	6	—	-55 to 105	RoHS Compliant

Engineering Selection Recommendations

Direct-Substitution Candidates (No Design Changes Required):

2-338315-2 and 6-338315-2 (TE Connectivity AMPLIMITE HDP-20 series): These through-hole solder connectors match the L77TSBH25SOL2 electrical performance profile with equivalent or higher current ratings (6A vs. 5A), maintain solder termination, and carry RoHS or ROHS3 compliance. Both are actively produced with high inventory levels.
5-338315-2 (TE Connectivity AMPLIMITE HDP-20): Functionally equivalent through-hole solder receptacle with ROHS3 compliance and 6A current rating, suitable for applications within the -55°C to 105°C operating range.

Compatible Alternatives with Compliance Advantage:

09663516513 (HARTING): Offers ROHS3 compliance with equivalent solder termination and operating temperature range. The higher current rating (6.5A) accommodates higher-current applications. Note that contact finish specification is not provided; contact manufacturer for confirmation of gold-plated contact specifications if critical for application.

Design-Dependent Substitutes:

1-745967-4 (TE Connectivity AMPLIMITE HD-20): Compatible solder-terminated receptacle with equivalent electrical characteristics but with a reduced maximum temperature limit of 105°C (versus 125°C for the primary part). Suitable only for applications operating at or below 105°C. RoHS non-compliance status requires regulatory verification for new designs.
NorComp 172-E25 Series (172-E25-213R001, 172-E25-213R011, 172-E25-213R031, 172-E25-213R911): Panel-mount through-hole alternatives with ROHS3 compliance. These variants differ significantly in flange configuration and are suitable for panel-mounted applications only. Operating temperature limited to -50°C to 100°C.

Not Recommended for Direct Substitution:

5745922-2 (TE Connectivity AMPLIMITE HD-20): Features press-fit termination instead of solder, requiring complete redesign of PCB pad patterns and assembly process. Current rating is not specified. Use only when press-fit technology is explicitly required.

Frequently Asked Questions (FAQ)

Q: Can I substitute the L77TSBH25SOL2 with the 09663516513 (HARTING)?

A: Yes, provided the application operating temperature does not exceed 125°C and contact finish specifications (gold plating) are acceptable to the application. The HARTING connector provides equivalent 25-position D-Sub functionality, maintains solder termination, operates within the required temperature range, and carries ROHS3 compliance. Verify contact finish specifications with HARTING before procurement.

Q: What is the primary difference between the Amphenol ICC L77TSBH25SOL2 and TE Connectivity 2-338315-2?

A: Both are 25-position D-Sub solder receptacles with equivalent electrical and mechanical characteristics. The primary operational difference is flange configuration: the L77TSBH25SOL2 features board-side mounting (4-40), while the 2-338315-2 uses housing/shell mounting (M3). Both support -55°C to 105°C operation, carry compliance certifications, and offer 6A current capacity. Selection depends on PCB layout requirements and available mounting hardware.

Q: Why are the NorComp 172-E series connectors listed as compatible but with noted differences?

A: The NorComp 172-E series maintains the 25-position D-Sub receptacle configuration with solder termination and gold-plated contacts. However, these connectors are specifically designed for panel-mount applications, requiring different PCB layout and mechanical integration than through-hole board-side mounting. Additionally, the operating temperature range (-50°C to 100°C) is narrower than the primary part. Use only when panel-mount configuration is required.

Q: Can I use the TE Connectivity 5745922-2 as a substitute?

A: No, not without complete PCB redesign. The 5745922-2 uses press-fit termination instead of solder, requiring different pad patterns and assembly processes. Additionally, current rating specification is not provided. Substitution is valid only when press-fit technology is explicitly specified in the design requirements.

Q: What RoHS compliance status should I verify before selecting a substitute?

A: The primary part (L77TSBH25SOL2) is RoHS Compliant. Most substitutes listed carry ROHS3 Compliant status, which is current as of regulatory requirements. The exception is 1-745967-4, which is RoHS non-compliant. For applications requiring compliance with current environmental regulations, select parts carrying ROHS3 Compliant status. For legacy systems, verify the regulatory environment of the end-application region.

Q: Do all substitute parts operate across the same temperature range as the L77TSBH25SOL2?

A: No. The primary part operates from -55°C to 125°C. Most TE Connectivity alternatives (1-745967-4, 2-338315-2, 5-338315-2, 5745922-2, 6-338315-2) are rated to -55°C to 105°C, which is 20°C lower at the upper limit. The HARTING 09663516513 and NorComp 172-E series variants are more restricted. Verify that substitute parts meet the full operating temperature range required by your application before selection.

Q: How do contact finishes differ among the available substitutes?

A: The primary part specifies flash gold plating. Most TE Connectivity and NorComp alternatives also specify gold contact finish, supporting equivalent signal integrity and corrosion resistance. The HARTING 09663516513 does not provide contact finish specification; contact information must be obtained directly from the manufacturer to confirm gold plating before procurement.

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