LCW-104-08-L-S-300 Equivalent & Substitute Parts

Part Overview

The LCW-104-08-L-S-300 is a 4-position rectangular connector header manufactured by Samtec Inc. with 0.100" (2.54mm) pitch spacing. This through-hole mounted component features friction lock fastening, gold-plated mating contacts, and tin-plated posts for solder termination. The connector is designed for board-to-board or cable applications with a single-wall shrouded design.

The part is currently in active production status with 1030 pieces available in inventory. Equivalent and substitute parts are identified based on matching critical electrical and mechanical parameters including pitch spacing, number of positions, contact configuration, mounting type, and operating temperature range.

Substiute Parts

LCW-104-08-L-S-300

Samtec Inc.In Stock: 1120LCW-104-08-L-S-300 Datasheet

Current PartRFQ

640456-4

TE Connectivity AMP ConnectorsIn Stock: 23078640456-4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCW-104-08-L-S-300 are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Pitch spacing of 0.100" (2.54mm)
• 4-position single-row configuration
• Male pin header connector type
• Through-hole solder termination
• Friction lock fastening mechanism
• Shrouded design with 1 wall
• Operating temperature range compatibility
• UL94 V-0 flammability rating

The substitute part TE Connectivity AMP Connectors 640456-4 meets these core requirements. Substitution is valid when the application does not require the specific contact finish specifications or exact contact length dimensions of the original part, provided the mating interface and electrical performance remain compatible within the defined parameter set.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The LCW-104-08-L-S-300 remains the specified component when the application requires the higher operating temperature range of -55°C to 125°C and the gold-plated mating contact finish for enhanced corrosion resistance and contact reliability.

Substitute Part Selection: The TE Connectivity 640456-4 is a valid substitute when the application operates within the -55°C to 105°C temperature range and does not require gold-plated mating contacts. This substitute is suitable for general-purpose board-to-cable applications with friction lock termination.

Compliance Considerations: Both parts maintain UL94 V-0 flammability ratings and RoHS compliance status, meeting regulatory requirements for industrial and commercial applications. The LCW-104-08-L-S-300 carries ROHS3 compliance, while the 640456-4 carries standard RoHS compliance.

Availability and Supply Chain: The TE Connectivity 640456-4 offers significantly higher inventory availability (23000 pieces) compared to the Samtec LCW-104-08-L-S-300 (1030 pieces), making it advantageous for high-volume production requirements or extended lead-time mitigation.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 640456-4 be used as a direct replacement for the LCW-104-08-L-S-300?

A: The 640456-4 is functionally compatible for applications operating within -55°C to 105°C. The primary differences are the mating contact finish (tin versus gold) and the upper operating temperature limit (105°C versus 125°C). Substitution is valid when these parameter differences do not conflict with application requirements.

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

A: Contact length variations exist within 0.010" (0.26mm) tolerance. The mating contact length differs by 0.005" (0.13mm), the post length by 0.010" (0.26mm), and the insulation height by 0.005" (0.12mm). These variations remain within typical PCB design tolerances for 0.100" pitch connectors.

Q: Does the difference in contact finish affect electrical performance?

A: Both gold-plated (LCW) and tin-plated (640456-4) finishes provide adequate electrical conductivity for the 3A current rating. Gold plating offers superior corrosion resistance in harsh environments, while tin plating is suitable for standard industrial applications.

Q: Are both parts suitable for solder termination on printed circuit boards?

A: Yes. Both connectors feature solder termination with through-hole mounting. The post lengths differ slightly (0.130" versus 0.140"), which may require minor PCB design adjustments but does not prevent soldering compatibility.

Q: What is the significance of the operating temperature range difference?

A: The LCW-104-08-L-S-300 supports operation up to 125°C, while the 640456-4 is rated to 105°C. Applications requiring sustained operation above 105°C must use the Samtec part. Standard industrial applications typically operate within the 105°C range.

Q: How do the insulation materials compare?

A: The LCW uses Polybutylene Terephthalate (PBT), while the 640456-4 uses generic thermoplastic. Both materials achieve UL94 V-0 flammability ratings. PBT offers superior chemical resistance and dimensional stability, while thermoplastic provides cost efficiency.

Q: Is inventory availability a factor in part selection?

A: The TE Connectivity 640456-4 maintains 23000 pieces in stock versus 1030 pieces for the Samtec LCW-104-08-L-S-300. For high-volume production or time-sensitive applications, the TE part offers supply chain advantages.

Q: Do both connectors meet current regulatory compliance requirements?

A: Yes. Both parts are RoHS compliant and carry UL94 V-0 flammability ratings. The LCW-104-08-L-S-300 specifically carries ROHS3 compliance certification, while the 640456-4 carries standard RoHS compliance. Both are suitable for regulated industrial applications.