Amphenol ICC 77773-307 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 77773-307 is a shrouded vertical header connector with 8 positions at 2.54mm pitch, designed for through-hole board-to-cable/wire applications. This connector features male pins with solder termination and friction lock fastening. The part is currently obsolete, with 1179 units available in new original stock. Due to its obsolete status and non-compliant RoHS classification, identifying active equivalent parts is essential for ongoing design support and procurement continuity.

Substiute Parts

77773-307

Amphenol ICC (FCI)In Stock: 118977773-307 Datasheet

Current PartRFQ

77773-307LF

Amphenol ICC (FCI)In Stock: 118277773-307LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Amphenol ICC 77773-307LF qualifies as a direct substitute based on the following critical parameters:

• Connector Type & Contact Configuration: Both parts are headers with male pins in identical 8-position, single-row configuration
• Pitch & Mating Dimensions: Both maintain 0.100" (2.54mm) pitch with identical contact lengths (0.197" mating, 0.134" post)
• Mechanical Interface: Both feature shrouded 2-wall design, through-hole mounting, solder termination, and friction lock fastening
• Insulation & Housing: Both use polyester glass-filled insulation with identical insulation height (0.368") and blue color
• Flammability Compliance: Both meet UL94 V-0 material flammability rating
• Series Compatibility: Both belong to the Dubox™ series

The primary distinction is that 77773-307LF is an active, RoHS-compliant variant with enhanced specifications (operating temperature range, current rating, and improved contact finish thickness on posts).

Parameter Comparison

Engineering Selection Recommendations

The 77773-307LF is the appropriate substitute for the obsolete 77773-307 in new designs and ongoing production. The substitute part maintains full mechanical and electrical compatibility while offering the following advantages:

• Active Product Status: The 77773-307LF is an active part with confirmed ongoing availability, eliminating supply chain risk associated with the obsolete 77773-307
• RoHS Compliance: The substitute meets RoHS requirements, supporting compliance with current regulatory standards and procurement policies
• Enhanced Specifications: The substitute provides documented operating temperature range (-40°C ~ 125°C) and current rating (3A), enabling proper thermal and electrical design validation
• Lead-Free Post Finish: The transition from tin-lead to tin plating on the post aligns with modern manufacturing standards while maintaining solder compatibility

The mechanical interface, pitch, shrouding, and contact configuration remain identical, ensuring direct form-fit-function compatibility in existing PCB layouts and mating connector designs.

Frequently Asked Questions (FAQ)

Q: Can the 77773-307LF be used as a direct replacement for the 77773-307 in existing designs?

A: Yes. Both parts share identical mechanical dimensions, pitch (2.54mm), contact configuration (8-position single-row male pins), shrouding (2-wall), mounting type (through-hole), and termination method (solder). The PCB footprint and mating connector interface remain unchanged.

Q: What is the difference between the contact finish on the post?

A: The 77773-307 uses tin-lead plating (150.0µin / 3.81µm), while the 77773-307LF uses tin plating (78.7µin / 2.00µm). Both finishes are compatible with standard solder processes. The tin finish on the substitute reflects current lead-free manufacturing practices.

Q: Why is the 77773-307 listed as obsolete?

A: The 77773-307 is classified as obsolete due to its RoHS non-compliant status and the availability of the active RoHS-compliant variant (77773-307LF). Amphenol ICC has transitioned this product line to the lead-free equivalent.

Q: Are there any electrical performance differences between these parts?

A: The 77773-307LF provides documented electrical specifications (3A current rating, -40°C ~ 125°C operating temperature) that are not specified for the 77773-307. The mating contact finish (gold plating at 30.0µin) and contact material (phosphor bronze) are identical, ensuring equivalent electrical performance in the mating interface.

Q: What is the packaging difference?

A: The 77773-307LF is supplied in tube packaging, while the 77773-307 packaging is not specified. This does not affect the component's electrical or mechanical function.

Q: Is the 77773-307LF suitable for high-temperature applications?

A: The 77773-307LF is rated for -40°C ~ 125°C operating temperature. Design validation should confirm this range meets specific application requirements.