SFMC-104-L3-S-D Equivalent & Substitute Parts

Part Overview

The SFMC-104-L3-S-D is an 8-position receptacle connector manufactured by Samtec Inc. from the Tiger Eye™ SFMC series. This board-to-board or cable connector features 0.050" (1.27mm) pitch mating with gold-plated contacts rated for 2.9A per contact. The part is actively produced and ROHS3 compliant, making it suitable for applications requiring high-reliability interconnection in temperature ranges from -55°C to 125°C. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

SFMC-104-L3-S-D

Samtec Inc.In Stock: 766SFMC-104-L3-S-D Datasheet

Current PartRFQ

LPPB042CFFN-RC

Sullins Connector SolutionsIn Stock: 2054LPPB042CFFN-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The LPPB042CFFN-RC from Sullins Connector Solutions qualifies as a substitute based on the following critical parameters:

• Connector Position Count: Both parts feature 8 positions
• Mating Pitch: Both maintain 0.050" (1.27mm) pitch spacing
• Row Configuration: Both use 2-row layout with 0.050" (1.27mm) row spacing
• Mounting Method: Both employ through-hole solder termination
• Contact Finish: Both provide gold-plated mating contacts
• Insulation Material: Both use Liquid Crystal Polymer (LCP)
• Flammability Rating: Both meet UL94 V-0 standard
• RoHS Compliance: Both are ROHS3 compliant

Substitution is valid where these core parameters align. Differences in contact material, current rating, temperature range, and contact finish thickness must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SFMC-104-L3-S-D and LPPB042CFFN-RC are active products with ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts depends on application-specific requirements:

The SFMC-104-L3-S-D supports a lower operating temperature minimum of -55°C compared to the LPPB042CFFN-RC at -40°C, making it suitable for applications requiring extended cold-temperature operation. The SFMC-104-L3-S-D also provides higher current capacity at 2.9A per contact versus 1A for the LPPB042CFFN-RC.

The LPPB042CFFN-RC uses phosphor bronze contacts with gold finish on the post, whereas the SFMC-104-L3-S-D uses beryllium copper with tin finish on the post. Contact material and finish selection should align with mating partner specifications and environmental exposure conditions.

Both parts are available in production quantities and maintain identical pitch, row spacing, and through-hole solder termination, ensuring mechanical and electrical compatibility at the board level when mating interface requirements are met.

Frequently Asked Questions (FAQ)

Q: Can LPPB042CFFN-RC directly replace SFMC-104-L3-S-D in all applications?

A: Direct replacement is valid only when the application does not require the extended temperature range of -55°C to -40°C or the higher current rating of 2.9A per contact. Both parts share identical pitch, row spacing, position count, and mounting method. Verify mating partner compatibility and contact material requirements before substitution.

Q: What is the difference between receptacle and header connector types?

A: The SFMC-104-L3-S-D is a receptacle (socket) connector, while the LPPB042CFFN-RC is a header connector (pin). Receptacles accept pins from a mating header. Headers provide pins that insert into receptacles. These are complementary connector types and cannot directly mate with the same partner.

Q: Are both parts RoHS compliant?

A: Yes, both SFMC-104-L3-S-D and LPPB042CFFN-RC are ROHS3 compliant and meet UL94 V-0 flammability requirements, suitable for applications with environmental and regulatory compliance mandates.

Q: What is the significance of contact material differences?

A: The SFMC-104-L3-S-D uses beryllium copper contacts, while LPPB042CFFN-RC uses phosphor bronze. Contact material affects electrical conductivity, spring force retention, and wear characteristics. Selection should match mating partner specifications and expected mating cycle requirements.

Q: How do insulation height differences affect compatibility?

A: The SFMC-104-L3-S-D has an insulation height of 0.180" (4.57mm) versus 0.177" (4.50mm) for LPPB042CFFN-RC. This 0.003" (0.07mm) difference is within typical manufacturing tolerance and does not affect mechanical or electrical compatibility in standard board-to-board applications.

Q: What packaging options are available?

A: SFMC-104-L3-S-D is supplied in tube packaging, while LPPB042CFFN-RC is supplied in bulk packaging. Packaging selection may affect inventory management, handling, and cost considerations but does not impact electrical or mechanical performance.