L77DFB25SAM4 Equivalent & Substitute Parts

Part Overview

The L77DFB25SAM4 is a 25-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female sockets connector features right-angle solder termination and panel mount through-hole mounting. The connector is designed for signal applications with a current rating of 7.5A and operates across a temperature range of -55°C to 155°C. The part is currently active in production status with 1067 units in stock. Equivalent and substitute parts are necessary to address supply chain flexibility, alternative sourcing options, and specific application requirements such as different flange configurations or packaging formats.

Substiute Parts

L77DFB25SAM4

Amphenol ICC (Commercial Products)In Stock: 1079L77DFB25SAM4 Datasheet

Current PartRFQ

182-025-213R531

NorComp Inc.In Stock: 6683182-025-213R531 Datasheet

SimilarRFQ

5745132-2

TE Connectivity AMP ConnectorsIn Stock: 11405745132-2 Datasheet

SimilarRFQ

5745392-2

TE Connectivity AMP ConnectorsIn Stock: 10985745392-2 Datasheet

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5745397-2

TE Connectivity AMP ConnectorsIn Stock: 12015745397-2 Datasheet

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5748901-1

TE Connectivity AMP ConnectorsIn Stock: 8755748901-1 Datasheet

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5748981-1

TE Connectivity AMP ConnectorsIn Stock: 13515748981-1 Datasheet

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745132-2

TE Connectivity AMP ConnectorsIn Stock: 984745132-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77DFB25SAM4 is determined by strict adherence to the following critical parameters:

Core Compatibility Parameters:

• Connector style (D-Sub), connector type (receptacle, female sockets), and position count (25 positions in 2 rows) must remain constant
• Shell size and connector layout (3 / DB, B) must match
• Mounting configuration (through hole, right angle) must be maintained
• Termination method (solder) must be identical
• Contact type (signal) must be preserved

Allowable Variations:

• Flange feature configuration (unthreaded housing, 4-40 threaded, or mating side screwlock)
• Packaging format (tray or bulk)
• Manufacturer identity (Amphenol ICC, NorComp Inc., TE Connectivity AMP Connectors)
• Shell material and finish specifications
• Contact finish thickness (within gold plating standards)
• Voltage rating (substitute may be lower than 300V)
• Current rating (substitute may be lower than 7.5A)
• Operating temperature range (substitute may be narrower than -55°C to 155°C)

Substitutes listed below maintain all core compatibility parameters while offering alternative sourcing from qualified manufacturers with active product status.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and meet the core D-Sub 25-position receptacle connector requirements. Selection among substitutes should be based on the following criteria:

For applications requiring maximum voltage and current capacity: The L77DFB25SAM4 (Amphenol ICC) with 300V and 7.5A ratings is the primary choice. No substitute part matches these specifications; all TE Connectivity and NorComp alternatives are rated at 125V or lower and 6A or lower.

For applications with standard voltage and current requirements (125V, 6A or less): TE Connectivity AMPLIMITE HD-20 series parts (5745132-2, 5745392-2, 5745397-2, 5748901-1, 5748981-1, 745132-2) are functionally equivalent. Selection among these should be based on flange configuration requirements and packaging format.

For applications with temperature range requirements above 105°C: The L77DFB25SAM4 is the only option, as all substitutes are limited to -55°C to 105°C operating range.

For applications requiring unthreaded housing flange: L77DFB25SAM4, 5745132-2, and 745132-2 provide unthreaded housing configurations.

For applications requiring 4-40 threaded housing flange: 182-025-213R531, 5745392-2, and 5748901-1 provide 4-40 threaded housing configurations.

For applications requiring mating side female screwlock (4-40): 5745397-2 and 5748981-1 provide mating side screwlock configurations.

For packaging format requirements: Tray packaging is available from L77DFB25SAM4, 182-025-213R531, 5745132-2, 5748901-1, 5748981-1, and 745132-2. Bulk packaging is available from 5745392-2 and 5745397-2.

For RoHS compliance verification: All parts except 745132-2 carry explicit RoHS compliance status (RoHS Compliant or ROHS3 Compliant). The 745132-2 part shows "Not applicable" RoHS status.

Frequently Asked Questions (FAQ)

Q: Can I substitute the L77DFB25SAM4 with any of the listed parts in a high-voltage application rated at 300V?

A: No. The L77DFB25SAM4 is rated for 300V, while all TE Connectivity and NorComp substitute parts are rated for 125V maximum. Substitution is not permissible for applications requiring 300V operation.

Q: What is the difference between the flange configurations offered in the substitute parts?

A: Three flange configurations are available: unthreaded housing (L77DFB25SAM4, 5745132-2, 745132-2), 4-40 threaded housing (182-025-213R531, 5745392-2, 5748901-1), and mating side female screwlock 4-40 (5745397-2, 5748981-1). The flange configuration determines the mechanical mounting interface and should be selected based on the specific panel or PCB mounting requirements.

Q: Are all substitute parts suitable for applications operating at -55°C to 155°C?

A: No. The L77DFB25SAM4 operates across -55°C to 155°C. All substitute parts are limited to -55°C to 105°C. For applications requiring operation above 105°C, the L77DFB25SAM4 is the only suitable option.

Q: What is the difference between tray and bulk packaging?

A: Tray packaging provides organized component presentation suitable for automated assembly processes. Bulk packaging provides loose components. The choice depends on manufacturing process requirements and handling procedures. Tray packaging is available from most suppliers; bulk packaging is available from 5745392-2 and 5745397-2.

Q: Can I use a substitute part with a lower current rating (5A or 6A) in place of the L77DFB25SAM4 (7.5A)?

A: Substitution with lower current ratings is not permissible. The L77DFB25SAM4 is rated for 7.5A. Substitute parts rated at 5A or 6A must not be used in applications requiring the full 7.5A capacity. Verify actual application current requirements before selecting a substitute.

Q: Are all substitute parts RoHS compliant?

A: Most substitute parts carry explicit RoHS compliance status. The 182-025-213R531, 5745132-2, 5745392-2, 5745397-2, 5748901-1, and 5748981-1 are RoHS compliant. The 745132-2 shows "Not applicable" RoHS status. Verify RoHS compliance requirements for your specific application before selection.

Q: What is the difference between the TE Connectivity AMPLIMITE HD-20 series parts?

A: All TE Connectivity parts listed (5745132-2, 5745392-2, 5745397-2, 5748901-1, 5748981-1, 745132-2) belong to the AMPLIMITE HD-20 series and share identical electrical specifications (125V, 6A, -55°C to 105°C). Differences exist in flange configuration, packaging format, and board lock features. Select based on specific mechanical mounting and assembly requirements.

Q: Is the NorComp 182-025-213R531 a direct replacement for the L77DFB25SAM4?

A: The 182-025-213R531 is functionally compatible for signal applications but differs in voltage rating (not specified vs. 300V), current rating (5A vs. 7.5A), operating temperature range (-55°C to 105°C vs. -55°C to 155°C), and flange configuration (4-40 threaded vs. unthreaded). It is suitable only for applications within its specified electrical and thermal limits.

Q: What inventory levels are available for each substitute part?

A: Current inventory levels are: L77DFB25SAM4 (1067 pcs), 182-025-213R531 (6654 pcs), 5745132-2 (1032 pcs), 5745392-2 (996 pcs), 5745397-2 (1142 pcs), 5748901-1 (847 pcs), 5748981-1 (1299 pcs), 745132-2 (971 pcs). The 182-025-213R531 offers the highest inventory availability.