L77SDA15S D-Sub Receptacle Connector - Equivalent & Substitute Parts

Part Overview

The L77SDA15S is a 15-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with solder cup termination and is designed for signal applications requiring reliable in-line connections. The part is currently active in production with 1103 units in stock. D-Sub connectors of this configuration are essential in applications requiring standardized, compact multi-pin interconnections with proven mechanical and electrical performance across industrial, telecommunications, and legacy equipment environments.

Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility, supply chain continuity, and cost optimization while maintaining functional compatibility.

Substiute Parts

L77SDA15S

Amphenol ICC (Commercial Products)In Stock: 1173L77SDA15S Datasheet

Current PartRFQ

DA-15SR

JAE ElectronicsIn Stock: 1459DA-15SR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L77SDA15S is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 15
• Number of Rows: 2
• Shell Size, Connector Layout: 2 (DA, A)
• Termination: Solder Cup
• Contact Type: Signal
• Operating Temperature Range: -55°C ~ 105°C
• Wire Gauge: 20 AWG

Allowable Variation Parameters:

• Mounting Type: Free Hanging (In-Line) or Panel Mount
• Shell Material and Finish: Steel with different plating options (Tin Plated or Clear Chromate Plated Zinc)
• Contact Material: Brass or Copper Alloy
• Current Rating: 3A or higher
• Voltage Rating: 250V or higher
• Dielectric Material: Thermoplastic or Polyamide variants, both glass-filled
• Color: Black or White
• RoHS/REACH Compliance: RoHS Compliant or ROHS3 Compliant

The DA-15SR from JAE Electronics meets all mandatory matching parameters and falls within allowable variation ranges for mounting type, shell material, current rating, and dielectric composition, establishing it as a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

L77SDA15S Selection Criteria:

• Primary choice for applications requiring free hanging (in-line) mounting configuration
• Specified 250V voltage rating provides explicit electrical performance documentation
• Tin-plated steel shell offers corrosion resistance in standard industrial environments
• UL94 V-0 flammability rating available for safety-critical applications
• RoHS Compliant status meets EU regulatory requirements

DA-15SR Selection Criteria:

• Suitable for panel mount applications where connector orientation is fixed to enclosure
• Higher current rating (5A vs. 3A) accommodates higher power signal applications
• ROHS3 Compliant status meets current and future EU regulatory requirements
• Clear chromate plated zinc shell provides alternative corrosion protection mechanism
• Copper alloy contacts offer alternative contact material performance characteristics

Substitution Feasibility: Both connectors are active products with confirmed inventory. The DA-15SR functions as a valid substitute when mounting type flexibility (panel mount vs. in-line) is acceptable and application current requirements do not exceed 5A. The difference in mounting type represents the primary design consideration for substitution decisions.

Frequently Asked Questions (FAQ)

Q: Can DA-15SR replace L77SDA15S in existing designs?

A: DA-15SR is electrically and mechanically compatible with L77SDA15S for signal applications within the specified operating temperature range. The primary difference is mounting type: DA-15SR is panel mount while L77SDA15S is free hanging (in-line). Substitution is feasible only if the application design accommodates panel mount configuration.

Q: What is the difference between tin plating and clear chromate plated zinc?

A: Both finishes provide corrosion protection on steel shells. Tin plating (L77SDA15S) offers direct corrosion resistance. Clear chromate plated zinc (DA-15SR) applies chromate conversion coating over zinc plating. Both are suitable for industrial environments; selection depends on specific environmental exposure requirements.

Q: Why does DA-15SR have a higher current rating (5A vs. 3A)?

A: Current rating reflects the maximum continuous current the connector contacts can safely carry without exceeding temperature limits. DA-15SR's 5A rating indicates higher current capacity. For applications requiring only 3A or less, both connectors are suitable. For applications exceeding 3A but within 5A, DA-15SR is required.

Q: Are both connectors RoHS compliant?

A: Yes. L77SDA15S is RoHS Compliant. DA-15SR is ROHS3 Compliant. ROHS3 represents the current EU directive version. Both meet RoHS requirements; ROHS3 compliance indicates DA-15SR meets the latest regulatory standard.

Q: What does Moisture Sensitivity Level 1 mean?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life without special moisture control storage requirements. Both connectors can be stored under standard industrial conditions without desiccant packaging or controlled humidity environments.

Q: Can these connectors be used interchangeably in the same circuit board layout?

A: No. L77SDA15S (free hanging in-line) and DA-15SR (panel mount) have different physical mounting interfaces. Circuit board layout and mechanical mounting structure must accommodate the specific mounting type. They cannot be used interchangeably without design modification.

Q: What is the significance of the 15-position, 2-row configuration?

A: This configuration defines the connector as a standard DA-size D-Sub connector with 15 signal pins arranged in two rows (7 pins in one row, 8 pins in the other). This is a widely standardized format used in legacy and current industrial equipment, ensuring broad compatibility with existing systems.

Q: Are there any voltage or current limitations when substituting?

A: L77SDA15S specifies 250V and 3A ratings. DA-15SR specifies 5A with no explicit voltage rating. For substitution, ensure application voltage does not exceed 250V and current does not exceed 5A. If application requires the explicit 250V specification, L77SDA15S is the required choice.