MOLC-120-31-L-Q Equivalent & Substitute Parts

Part Overview

The MOLC-120-31-L-Q is a rectangular connector header manufactured by Samtec Inc. within the FOURRAY™ MOLC series. This through-hole connector features 80 positions arranged in 4 rows with 0.050" (1.27mm) pitch, designed for board-to-board applications. The part maintains Active product status and is ROHS3 compliant with UL94 V-0 flammability rating. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when specific feature requirements necessitate alternative configurations.

Substiute Parts

MOLC-120-31-L-Q

Samtec Inc.In Stock: 861MOLC-120-31-L-Q Datasheet

Current PartRFQ

MOLC-120-31-L-Q-LC

Samtec Inc.In Stock: 1178MOLC-120-31-L-Q-LC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOLC-120-31-L-Q is determined by strict equivalence across the following critical parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 80
• Number of Rows: 4
• Pitch - Mating: 0.050" (1.27mm)
• Row Spacing - Mating: 0.050" (1.27mm)
• Mounting Type: Through Hole
• Shrouding: Shrouded - 4 Wall
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Length - Mating: 0.144" (3.66mm)
• Contact Length - Post: 0.075" (1.91mm)
• Insulation Height: 0.435" (11.05mm)
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Finish Thickness - Mating: 10.0µin (0.25µm)
• Contact Finish - Post: Tin
• Contact Material: Phosphor Bronze
• Insulation Material: Liquid Crystal Polymer (LCP)
• Operating Temperature: -55°C ~ 125°C
• Material Flammability Rating: UL94 V-0
• Current Rating: 2.6A per Contact
• Mated Stacking Heights: 11.43mm
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute maintains all critical electrical and mechanical parameters while introducing an additional feature designation.

Parameter Comparison

Engineering Selection Recommendations

Both MOLC-120-31-L-Q and MOLC-120-31-L-Q-LC are Active products manufactured by Samtec Inc. within the FOURRAY™ MOLC series. Both parts maintain ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements for industrial and commercial applications.

The MOLC-120-31-L-Q-LC incorporates a Board Lock feature, which provides mechanical retention enhancement during mating operations. This feature does not alter electrical performance, current rating, or thermal characteristics. Selection between these parts depends on application-specific mechanical retention requirements.

Both parts are electrically and mechanically interchangeable within the specified parameter set. Current inventory levels support both options for component procurement.

Frequently Asked Questions (FAQ)

Q: Are MOLC-120-31-L-Q and MOLC-120-31-L-Q-LC electrically identical?

A: Yes. Both parts maintain identical electrical specifications including 2.6A per contact current rating, gold-plated mating contacts, and phosphor bronze contact material. Operating temperature range and voltage handling characteristics are equivalent.

Q: What is the functional difference between these two part numbers?

A: The MOLC-120-31-L-Q-LC includes a Board Lock feature for enhanced mechanical retention. This does not affect electrical performance or thermal ratings.

Q: Can I substitute MOLC-120-31-L-Q-LC for MOLC-120-31-L-Q in existing designs?

A: Yes. The MOLC-120-31-L-Q-LC maintains all critical electrical and mechanical parameters. The Board Lock feature provides additional mechanical stability without requiring design modifications.

Q: Are both parts RoHS compliant?

A: Yes. Both MOLC-120-31-L-Q and MOLC-120-31-L-Q-LC are ROHS3 compliant.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Do these connectors support the same mating pitch and row spacing?

A: Yes. Both parts feature 0.050" (1.27mm) mating pitch and 0.050" (1.27mm) row spacing, ensuring mechanical compatibility with identical mating connectors.