SDL-123-T-12 Equivalent & Substitute Parts

Part Overview

The SDL-123-T-12 is a 46-position receptacle connector manufactured by Samtec Inc., designed for board-to-board applications with 0.100" (2.54mm) pitch spacing. This connector features through-hole solder termination, gold-plated mating contacts, and operates across -55°C to 125°C. The part is currently active in production and widely available with 974 units in stock.

Substitute parts are identified when discontinuation or supply constraints occur, requiring equivalent connectors that maintain identical electrical and mechanical specifications for direct board-level replacement.

Substiute Parts

SDL-123-T-12

Samtec Inc.In Stock: 1064SDL-123-T-12 Datasheet

Current PartRFQ

SDL-123-G-12

Samtec Inc.In Stock: 853SDL-123-G-12 Datasheet

SimilarRFQ

SDL-123-G-12

Samtec Inc.In Stock: 853SDL-123-G-12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDL-123-T-12 is determined by strict equivalence across the following critical parameters:

• Connector type (Receptacle)
• Position count (46 positions)
• Mating pitch (0.100" / 2.54mm)
• Row configuration (2 rows with 0.100" spacing)
• Mounting method (Through Hole)
• Termination type (Solder)
• Contact finish specification (Gold at 30.0µin / 0.76µm mating surface)
• Insulation material (Liquid Crystal Polymer)
• Temperature rating (-55°C to 125°C minimum)
• Compliance certifications (ROHS3, REACH Unaffected)

The SDL-123-G-12 meets all substitution criteria as a direct equivalent within the SDL series, with identical mechanical and electrical characteristics suitable for board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

The SDL-123-T-12 remains the primary selection for new designs due to active production status and superior inventory availability. The SDL-123-G-12 functions as a direct substitute when SDL-123-T-12 supply becomes constrained, as both parts maintain identical mechanical interfaces, electrical specifications, and regulatory compliance certifications.

Both connectors satisfy ROHS3 and REACH requirements, ensuring compatibility with current environmental regulations. The MSL rating of 1 (Unlimited) for both parts eliminates moisture sensitivity concerns during storage and handling.

Selection between these parts should be based solely on availability and lead time requirements, as no functional or performance differentiation exists between them at the board-level integration point.

Frequently Asked Questions (FAQ)

Q: Can SDL-123-G-12 be used as a direct replacement for SDL-123-T-12 on existing PCBs?

A: Yes. Both connectors share identical footprint dimensions, pitch spacing, mounting hole patterns, and solder pad layouts. No PCB redesign is required.

Q: Are there differences in contact plating that affect signal integrity?

A: Both parts specify 30.0µin (0.76µm) gold plating on mating contacts. The SDL-123-G-12 includes additional gold plating on the post (10.0µin / 0.25µm), which does not affect mating performance or electrical characteristics.

Q: Do both connectors meet the same temperature and compliance requirements?

A: Yes. Both operate across -55°C to 125°C and hold identical ROHS3 and REACH certifications. MSL rating is 1 (Unlimited) for both.

Q: Why is SDL-123-G-12 discontinued if it is functionally equivalent?

A: Product discontinuation at distributors reflects supply chain decisions and does not indicate functional obsolescence. The SDL-123-T-12 remains in active production as the primary offering within the SDL series.

Q: What is the difference between the "T" and "G" designations in the part numbers?

A: The designations reflect internal Samtec product line variants. Both maintain full electrical and mechanical equivalence for board-to-board connector applications.