L77TWA7W2SP3SY D-Sub Combo Receptacle Connector

Part Overview

The L77TWA7W2SP3SY is a 7-position D-Sub combo receptacle connector manufactured by Amphenol ICC (Commercial Products). This panel-mount, solder-terminated connector features female sockets configured as 5 signal positions plus 2 power positions in a 2-row layout with shell size 2 (DA, A) designation. The connector is actively produced and maintains RoHS compliance with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory constraints occur, or specific performance characteristics become critical to application requirements.

Substiute Parts

L77TWA7W2SP3SY

Amphenol ICC (Commercial Products)In Stock: 1110L77TWA7W2SP3SY Datasheet

Current PartRFQ

681S7W2203L001

NorComp Inc.In Stock: 1041681S7W2203L001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77TWA7W2SP3SY with the 681S7W2203L001 is based on strict alignment of the following critical parameters:

Matching Parameters:

• Connector style: D-Sub, Combo
• Connector type: Receptacle, Female Sockets
• Number of positions: 7 (5 + 2 Power)
• Number of rows: 2
• Shell size and layout: 2 (DA, A) - 7W2
• Mounting type: Panel Mount, Through Hole
• Termination method: Solder
• Contact type: Signal and Power
• Flange feature: Housing/Shell (Unthreaded)
• Operating temperature range: -55°C ~ 155°C
• Moisture sensitivity level: 1 (Unlimited)
• ECCN classification: EAR99
• HTSUS code: 8536.69.4040

Both connectors are actively produced and maintain compliance certifications. The 681S7W2203L001 is manufactured by NorComp Inc. and represents a functionally equivalent alternative within the D-Sub combo receptacle category.

Parameter Comparison

Engineering Selection Recommendations

Both the L77TWA7W2SP3SY and 681S7W2203L001 are active production connectors with full compliance certifications. The L77TWA7W2SP3SY carries RoHS compliance and is manufactured by Amphenol ICC. The 681S7W2203L001 carries ROHS3 compliance and REACH Unaffected status, manufactured by NorComp Inc.

Selection between these parts is determined by:

1. Inventory Availability: L77TWA7W2SP3SY maintains 1091 pieces in stock; 681S7W2203L001 maintains 976 pieces in stock.

2. Compliance Requirements: Both parts meet RoHS standards. The 681S7W2203L001 provides additional REACH documentation for applications requiring REACH Unaffected status.

3. Shell Material Finish: L77TWA7W2SP3SY features tin-plated steel shell; 681S7W2203L001 features nickel-plated steel shell. Material finish selection depends on corrosion resistance requirements in the target environment.

4. Ingress Protection: The 681S7W2203L001 provides IP67 rating (dust tight, waterproof); L77TWA7W2SP3SY does not specify ingress protection. Applications requiring sealed connector performance necessitate the 681S7W2203L001.

5. Flammability Rating: The 681S7W2203L001 carries UL94 V-0 material flammability rating; L77TWA7W2SP3SY does not specify this rating. Applications subject to flammability standards require the 681S7W2203L001.

6. Dielectric Material: L77TWA7W2SP3SY uses thermoplastic; 681S7W2203L001 uses polybutylene terephthalate (PBT). PBT provides enhanced thermal and chemical resistance.

Frequently Asked Questions (FAQ)

Q: Can the 681S7W2203L001 directly replace the L77TWA7W2SP3SY in existing designs?

A: Yes. Both connectors share identical shell size (2 / DA, A - 7W2), position count (7 with 5 + 2 power configuration), row count (2), mounting type (panel mount, through hole), and termination method (solder). Physical and electrical compatibility is established through these matching parameters.

Q: What are the key differences between these two connectors?

A: The primary differences are: (1) shell material finish (tin-plated vs. nickel-plated steel), (2) ingress protection rating (none specified vs. IP67), (3) flammability rating (none specified vs. UL94 V-0), (4) dielectric material (thermoplastic vs. PBT), and (5) current rating specifications (7.5A vs. 5A/40A). These differences do not affect mechanical or electrical compatibility but may influence suitability for specific environmental or regulatory applications.

Q: Are there voltage or temperature limitations when substituting these parts?

A: Both connectors operate across the identical temperature range of -55°C to 155°C. The L77TWA7W2SP3SY specifies 300V voltage rating; the 681S7W2203L001 does not specify voltage rating in the provided data. Applications with specific voltage requirements should reference the 300V specification of the L77TWA7W2SP3SY.

Q: Which connector should be selected for sealed or waterproof applications?

A: The 681S7W2203L001 is the appropriate selection for sealed applications, as it carries IP67 ingress protection rating (dust tight, waterproof). The L77TWA7W2SP3SY does not specify ingress protection and is not rated for sealed environments.

Q: What is the significance of the UL94 V-0 flammability rating on the 681S7W2203L001?

A: UL94 V-0 indicates the dielectric material meets vertical flame test requirements with no flaming drips. This rating is required for applications subject to flammability standards or safety certifications. The L77TWA7W2SP3SY does not specify a flammability rating and may not satisfy applications with this requirement.

Q: Are both connectors available in equivalent quantities?

A: Both connectors are in active production with substantial inventory. The L77TWA7W2SP3SY has 1091 pieces in stock; the 681S7W2203L001 has 976 pieces in stock. Both are packaged in trays and carry unlimited moisture sensitivity rating (MSL 1).

Q: Do these connectors require different PCB footprints or mounting procedures?

A: No. Both connectors use identical panel mount, through-hole termination with unthreaded housing/shell flanges. PCB footprints and mounting procedures are interchangeable.