Equivalent & Substitute Parts for 77311-402-20LF

Part Overview

The Amphenol ICC 77311-402-20LF is an active rectangular connector header designed for through-hole mounting applications. This 20-position, single-row connector operates at 0.100" (2.54mm) pitch and supports 3A per contact with tin-plated phosphor bronze contacts. The part is RoHS compliant and rated for operating temperatures from -65°C to 125°C. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support alternative contact finishes or mechanical configurations while maintaining electrical and mechanical compatibility.

Substiute Parts

77311-402-20LF

Amphenol ICC (FCI)In Stock: 97477311-402-20LF Datasheet

Current PartRFQ

PEC20SAAN

Sullins Connector SolutionsIn Stock: 2144PEC20SAAN Datasheet

MFR RecommendedRFQ

TS-120-G-A-1

Samtec Inc.In Stock: 813TS-120-G-A-1 Datasheet

MFR RecommendedRFQ

TS-120-G-A-2

Samtec Inc.In Stock: 857TS-120-G-A-2 Datasheet

MFR RecommendedRFQ

TS-120-G-AA

Samtec Inc.In Stock: 766TS-120-G-AA Datasheet

MFR RecommendedRFQ

TS-120-T-AA

Samtec Inc.In Stock: 741TS-120-T-AA Datasheet

MFR RecommendedRFQ

TSW-120-07-F-S

Samtec Inc.In Stock: 1158TSW-120-07-F-S Datasheet

MFR RecommendedRFQ

TSW-120-07-L-S-LL

Samtec Inc.In Stock: 934TSW-120-07-L-S-LL Datasheet

MFR RecommendedRFQ

TSW-120-08-L-S-LL

Samtec Inc.In Stock: 837TSW-120-08-L-S-LL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters: connector type (header), contact type (male pin), number of positions (20), pitch (0.100" / 2.54mm), number of rows (1), mounting type (through hole), termination method (solder), contact material (phosphor bronze), operating temperature range, and material flammability rating (UL94 V-0).

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents — Parts that maintain identical electrical and mechanical interfaces with variations only in contact finish (tin or gold), insulation material (thermoplastic or PBT), or post length. These parts are interchangeable in applications where contact finish does not affect circuit performance.

Category 2: Functional Equivalents with Minor Variations — Parts that meet all core electrical requirements but include design variations such as breakaway capability, different contact post lengths, or kinked pin termination. These parts are suitable for applications where mechanical flexibility or specific mounting configurations are beneficial.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and comply with RoHS requirements, ensuring long-term availability and regulatory compliance.

PEC20SAAN (Sullins Connector Solutions) is the primary direct substitute. It matches the 77311-402-20LF across all core electrical and mechanical parameters with identical pitch, position count, and operating temperature range. The PBT insulation material provides equivalent performance to thermoplastic. The breakaway feature offers design flexibility for applications requiring individual pin separation.

TS-120-G-A-1, TS-120-G-A-2, and TS-120-G-AA (Samtec Inc.) are functionally equivalent with gold-plated mating contacts instead of tin. Gold plating provides enhanced corrosion resistance and is suitable for applications requiring superior contact reliability. These parts are interchangeable where contact finish does not affect circuit performance.

TS-120-T-AA (Samtec Inc.) maintains tin contact finish matching the 77311-402-20LF with increased contact finish thickness (200.0µin vs. 78.7µin), providing additional durability for high-cycle mating applications.

TSW-120-07-F-S, TSW-120-07-L-S-LL, and TSW-120-08-L-S-LL (Samtec Inc.) feature gold-plated mating contacts with kinked pin termination for enhanced mechanical retention. The TSW series operates at -55°C to 125°C, which is narrower than the main part's -65°C to 125°C range. Post length variations (0.100" for TSW-120-07 variants, 0.200" for TSW-120-08-L-S-LL) accommodate different PCB thicknesses and mounting depths.

Frequently Asked Questions (FAQ)

Q: Can I use a gold-plated substitute (TS-120-G-A-1, TS-120-G-A-2, TS-120-G-AA) in place of the tin-plated 77311-402-20LF?

A: Yes. Gold plating provides equivalent electrical conductivity and superior corrosion resistance. Gold-plated contacts are interchangeable with tin-plated contacts in standard applications. Select gold plating when enhanced contact reliability or extended shelf life is required.

Q: What is the difference between TS-120-T-AA and the main part 77311-402-20LF?

A: Both use tin plating on phosphor bronze contacts. TS-120-T-AA features thicker contact finish (200.0µin vs. 78.7µin), providing increased durability for high-cycle mating environments. Electrical performance is equivalent.

Q: Why do TSW-120-07-L-S-LL and TSW-120-08-L-S-LL have different post lengths?

A: Post length determines insertion depth into the PCB. TSW-120-07 variants (0.100" post) suit standard PCB thicknesses, while TSW-120-08-L-S-LL (0.200" post) accommodates thicker PCBs or applications requiring deeper mechanical engagement. Select based on PCB thickness and mounting requirements.

Q: Is the operating temperature range difference between the main part (-65°C to 125°C) and TSW series (-55°C to 125°C) significant?

A: The TSW series operates at a narrower temperature range. If your application requires operation below -55°C, use the main part 77311-402-20LF or PEC20SAAN. For standard industrial applications within -55°C to 125°C, TSW variants are suitable.

Q: What does "kinked pin termination" mean in TSW-120-07-L-S-LL and TSW-120-08-L-S-LL?

A: Kinked pins feature a mechanical bend that provides enhanced retention during PCB insertion and reduces the risk of pin straightening under stress. This design improves mechanical reliability in high-vibration or high-shock environments.

Q: Can I substitute PEC20SAAN (with breakaway feature) for the 77311-402-20LF?

A: Yes. The breakaway feature allows individual pins to be separated from the connector body. This adds design flexibility without affecting electrical performance. If your application does not require breakaway capability, this feature is inert and does not impact compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS3 compliant or RoHS compliant, meeting regulatory requirements for hazardous substance restrictions. The main part 77311-402-20LF is RoHS compliant.