TE Connectivity 748979-1 D-Sub Receptacle Equivalent & Substitute Parts

Part Overview

The TE Connectivity 748979-1 is a 9-position D-Sub receptacle connector with female sockets, right-angle solder termination, and through-hole mounting. This connector is part of the AMPLIMITE HD-20 series and is classified as Active product status. Alternative equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when specific application requirements necessitate alternative specifications.

Substiute Parts

748979-1

TE Connectivity AMP ConnectorsIn Stock: 1046748979-1 Datasheet

Current PartRFQ

5748979-1

TE Connectivity AMP ConnectorsIn Stock: 18395748979-1 Datasheet

DirectRFQ

L77DFE09S1AON

Amphenol ICC (Commercial Products)In Stock: 1134L77DFE09S1AON Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TE Connectivity 748979-1 are identified based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Matching Parameters:

• Connector style (D-Sub)
• Connector type (Receptacle, Female Sockets)
• Number of positions (9)
• Number of rows (2)
• Shell size and layout (1 / DE, E)
• Termination method (Solder)
• Contact type (Signal)
• Mounting configuration (Through Hole, Right Angle)

Acceptable Variation Parameters:

• Voltage rating (substitute must meet or exceed 125V)
• Operating temperature range (substitute must cover or exceed -55°C ~ 105°C)
• Contact finish specifications (gold plating acceptable across manufacturers)
• Flammability rating (UL94 V-0 maintained)
• Backset spacing and mechanical dimensions within connector family standards

Parts are grouped into two categories:

Direct Equivalent (5748979-1): Identical specifications with alternative RoHS compliance status and increased inventory availability.

Similar Substitute (L77DFE09S1AON): Alternative manufacturer offering with compatible electrical and mechanical parameters but differing in specific attributes such as backset spacing, voltage rating, current rating, and flange feature design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (5748979-1):

The TE Connectivity 5748979-1 is a direct equivalent to the 748979-1 with identical electrical and mechanical specifications. This part maintains the same AMPLIMITE HD-20 series designation, connector configuration, and performance characteristics. The primary distinction is RoHS Compliant status on the 5748979-1 versus Not Applicable on the 748979-1. Selection of 5748979-1 is appropriate when RoHS compliance is required for the application or when higher inventory availability (1791 pcs vs. 974 pcs) supports procurement timelines.

For Alternative Substitution (L77DFE09S1AON):

The Amphenol ICC L77DFE09S1AON is a compatible alternative from a different manufacturer. This part shares the core D-Sub 9-position receptacle configuration and solder termination but differs in several specifications:

• Voltage rating is elevated to 300V (exceeds 125V requirement)
• Operating temperature range extends to 125°C (exceeds -55°C ~ 105°C requirement)
• Current rating is specified at 7.5A (not specified on main part)
• Backset spacing is 0.406" (10.30mm) versus 0.318" (8.08mm)
• Flange feature is unthreaded housing versus female screwlock
• Contact finish thickness is 20.0µin versus 30.0µin
• Shell material is steel with tin plating (specified versus not specified)

Selection of L77DFE09S1AON is appropriate when the application can accommodate the increased backset spacing, does not require the female screwlock feature, and benefits from the higher voltage and temperature ratings. Both substitute parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity classification. All three parts are Active product status with RoHS compliance or equivalent environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can 5748979-1 be used as a direct replacement for 748979-1?

A: Yes. The 5748979-1 is electrically and mechanically identical to 748979-1. Both are 9-position D-Sub receptacles with female sockets, right-angle solder termination, and identical connector specifications. The primary difference is RoHS compliance status. Direct substitution is supported without design modification.

Q: What are the key differences between 748979-1 and L77DFE09S1AON?

A: The L77DFE09S1AON differs in backset spacing (0.406" vs. 0.318"), flange feature (unthreaded housing vs. female screwlock), voltage rating (300V vs. 125V), and contact finish thickness (20.0µin vs. 30.0µin). Both maintain 9-position D-Sub receptacle configuration with solder termination. Substitution requires verification that the application can accommodate increased backset spacing and does not depend on the female screwlock feature.

Q: Are all three parts compatible with the same mating connector?

A: The 748979-1 and 5748979-1 are fully compatible with the same mating connectors due to identical shell size (1 / DE, E) and connector layout. The L77DFE09S1AON shares the same shell size and layout but has different backset spacing (0.406" vs. 0.318"), which may affect PCB layout and mounting hole positioning. Verification of mechanical compatibility with the specific application is required.

Q: Which part should be selected for new designs?

A: For new designs, either 5748979-1 or L77DFE09S1AON can be selected based on application requirements. The 5748979-1 maintains identical specifications to 748979-1 with RoHS compliance. The L77DFE09S1AON offers higher voltage and temperature ratings but requires design accommodation for increased backset spacing and unthreaded housing configuration.

Q: What is the significance of the backset spacing difference?

A: Backset spacing (0.318" for 748979-1/5748979-1 vs. 0.406" for L77DFE09S1AON) determines the distance from the mounting surface to the connector mating face. This dimension directly affects PCB layout, mounting hole positioning, and mechanical clearance. Designs must be verified to accommodate the specific backset spacing of the selected part.

Q: Are there any compliance or certification differences between the three parts?

A: All three parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity classification. The 5748979-1 is RoHS Compliant, while 748979-1 is Not Applicable and L77DFE09S1AON is RoHS Compliant. All parts are classified as Active product status. Environmental compliance requirements should be verified against specific application and regional standards.

Q: Can the female screwlock feature on 748979-1 be replicated with L77DFE09S1AON?

A: No. The L77DFE09S1AON features an unthreaded housing/shell design, which does not provide the female screwlock (4-40) capability of 748979-1. If the application requires threaded mating security, L77DFE09S1AON is not suitable. The 5748979-1 maintains the female screwlock feature and is the appropriate substitute in this case.

Q: What inventory considerations apply to these parts?

A: Current inventory levels are 974 pcs for 748979-1, 1791 pcs for 5748979-1, and 1089 pcs for L77DFE09S1AON. The 5748979-1 offers the highest inventory availability. For time-sensitive procurement, inventory status should be verified with the supplier, as levels are subject to change.