SFM-125-03-L-D Equivalent & Substitute Parts

Part Overview

The SFM-125-03-L-D is a 50-position receptacle connector from Samtec Inc.'s Tiger Eye™ SFM series, designed for board-to-board or cable applications. This through-hole mounted connector features a 0.050" (1.27mm) pitch with gold-plated mating contacts and tin-plated posts. The connector is actively produced and maintains full inventory availability. Substitute parts are identified to support procurement flexibility, design revisions, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

SFM-125-03-L-D

Samtec Inc.In Stock: 1020SFM-125-03-L-D Datasheet

Current PartRFQ

SFM-125-03-L-D-A

Samtec Inc.In Stock: 1365SFM-125-03-L-D-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFM-125-03-L-D is determined by strict equivalence across the following critical parameters:

• Connector type (Receptacle)
• Contact type (Female Socket)
• Number of positions (50)
• Pitch - mating (0.050" / 1.27mm)
• Number of rows (2)
• Row spacing - mating (0.050" / 1.27mm)
• Mounting type (Through Hole)
• Termination method (Solder)
• Fastening type (Push-Pull)
• Contact finish - mating (Gold)
• Current rating (3.2A per Contact)
• Voltage rating (250VAC)
• Operating temperature range (-55°C to 125°C)
• Insulation material (Liquid Crystal Polymer)
• Material flammability rating (UL94 V-0)
• RoHS compliance (ROHS3)

The identified substitute maintains all critical electrical and mechanical parameters. Minor variations in features such as board guide presence do not affect core substitution compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the SFM-125-03-L-D and SFM-125-03-L-D-A are active products from Samtec Inc. with full ROHS3 compliance and UL94 V-0 material certification. The parts are electrically and mechanically equivalent across all specified parameters. The SFM-125-03-L-D-A includes a board guide feature, which provides additional mechanical stability during mating operations but does not alter electrical performance or core compatibility. Selection between these parts should be based on PCB design requirements and mechanical assembly considerations. Both parts maintain identical electrical ratings, operating temperature ranges, and contact specifications.

Frequently Asked Questions (FAQ)

Q: Can SFM-125-03-L-D-A be used as a direct replacement for SFM-125-03-L-D?

A: Yes. Both connectors are electrically and mechanically equivalent. The SFM-125-03-L-D-A includes a board guide feature that does not affect electrical performance or core substitution compatibility. PCB layout and mechanical assembly requirements should be evaluated to determine if the board guide is beneficial for your application.

Q: What are the critical parameters that define substitution compatibility?

A: Substitution compatibility is determined by equivalence in connector type (Receptacle), contact type (Female Socket), position count (50), mating pitch (0.050"), row configuration (2 rows at 0.050" spacing), mounting method (Through Hole), termination (Solder), fastening type (Push-Pull), contact finishes (Gold mating / Tin post), current rating (3.2A per contact), voltage rating (250VAC), operating temperature (-55°C to 125°C), insulation material (LCP), flammability rating (UL94 V-0), and RoHS compliance (ROHS3).

Q: Are there differences in mated stacking heights between these parts?

A: Both parts support identical mated stacking heights: 6.02mm, 6.17mm, 7.80mm, 7.95mm, 9.58mm, 9.73mm, 11.48mm, and 11.63mm. Stacking height selection depends on the mating connector used and system design requirements.

Q: What is the significance of the board guide feature in SFM-125-03-L-D-A?

A: The board guide provides mechanical alignment assistance during connector mating. This feature improves assembly reliability and reduces the risk of misalignment but does not change electrical specifications or contact performance.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both SFM-125-03-L-D and SFM-125-03-L-D-A operate across the identical temperature range of -55°C to 125°C with no derating required within this range.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and carry UL94 V-0 material flammability certification. Both are classified as active products with no planned obsolescence.