MOLC-140-31-L-Q Equivalent & Substitute Parts

Part Overview

The MOLC-140-31-L-Q is a rectangular connector header manufactured by Samtec Inc. within the FOURRAY™ MOLC series. This through-hole mounted connector features 160 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 support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when specific feature requirements necessitate alternative configurations.

Substiute Parts

MOLC-140-31-L-Q

Samtec Inc.In Stock: 796MOLC-140-31-L-Q Datasheet

Current PartRFQ

MOLC-140-31-L-Q-LC

Samtec Inc.In Stock: 883MOLC-140-31-L-Q-LC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOLC-140-31-L-Q is determined by strict equivalence across the following critical parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 160
• 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 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
• Base Product Number: MOLC-140
• RoHS Status: ROHS3 Compliant

The substitute part MOLC-140-31-L-Q-LC meets all critical electrical and mechanical parameters. Variations in non-critical attributes such as Features (Board Lock addition) and Moisture Sensitivity Level classification do not affect functional interchangeability in applications requiring the specified electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both MOLC-140-31-L-Q and MOLC-140-31-L-Q-LC maintain Active product status from Samtec Inc. and satisfy ROHS3 compliance requirements. Selection between these parts is based on application-specific requirements:

The MOLC-140-31-L-Q is suitable for standard board-to-board interconnect applications requiring 160-position through-hole headers with 0.050" pitch and 4-row configuration.

The MOLC-140-31-L-Q-LC incorporates Board Lock functionality, providing enhanced mechanical retention in applications where connector stability under vibration or mechanical stress is a design requirement. This variant maintains identical electrical and thermal specifications while offering improved mechanical performance through the integrated locking feature.

Both parts are certified to UL94 V-0 flammability standards and operate across the -55°C to 125°C temperature range. Current rating of 2.6A per contact applies uniformly across both configurations. Selection should be based on whether Board Lock functionality is required for the specific application.

Frequently Asked Questions (FAQ)

Q: Are MOLC-140-31-L-Q and MOLC-140-31-L-Q-LC electrically interchangeable?

A: Yes. Both parts share identical electrical specifications including contact material (Phosphor Bronze), contact finish (Gold mating surface, Tin post), current rating (2.6A per contact), and operating temperature range (-55°C ~ 125°C).

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

A: The MOLC-140-31-L-Q-LC includes Board Lock functionality, which provides mechanical retention enhancement. The base MOLC-140-31-L-Q does not include this feature. All other mechanical and electrical parameters are identical.

Q: Can I substitute MOLC-140-31-L-Q-LC for MOLC-140-31-L-Q in existing designs?

A: Yes, provided the application does not have physical space constraints that would be affected by the Board Lock feature. The connector maintains the same mating interface, pitch (0.050"), row spacing (0.050"), and overall dimensions including mated stacking height (11.43mm).

Q: Are both parts RoHS compliant?

A: Yes. Both MOLC-140-31-L-Q and MOLC-140-31-L-Q-LC are ROHS3 compliant.

Q: What is the difference in Moisture Sensitivity Level between these parts?

A: MOLC-140-31-L-Q is classified as MSL 1 (Unlimited), while MOLC-140-31-L-Q-LC is classified as Not Applicable. This difference does not affect functional performance or storage requirements for standard industrial applications.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both parts operate across the -55°C to 125°C temperature range and are rated UL94 V-0 for material flammability.

Q: What is the pitch specification for these connectors?

A: Both parts feature 0.050" (1.27mm) mating pitch with 0.050" (1.27mm) row spacing across 4 rows, accommodating 160 total positions.