Equivalent & Substitute Parts for B5741-206-F-N-2

Part Overview

The B5741-206-F-N-2 is a 6-position receptacle connector from Harwin Inc.'s Datamate L-Tek series, designed for board-to-board or cable applications with 0.079" (2.00mm) pitch spacing. This connector features through-hole solder termination, gold-plated contacts, and is rated for 3A at 120V across operating temperatures from -55°C to 125°C. The part is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

B5741-206-F-N-2

Harwin Inc.In Stock: 788B5741-206-F-N-2 Datasheet

Current PartRFQ

M80-8500645

Harwin Inc.In Stock: 1821M80-8500645 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The M80-8500645 qualifies as a direct substitute for the B5741-206-F-N-2 based on the following critical parameters:

• Identical connector type (receptacle) and contact type (female socket)
• Matching position count (6 positions) and row configuration (2 rows)
• Identical pitch spacing (0.079" / 2.00mm) for both mating and row spacing
• Same mounting method (through hole) and termination type (solder)
• Identical contact material (beryllium copper) and mating contact finish (gold)
• Matching operating temperature range (-55°C to 125°C)
• Same material flammability rating (UL94 V-0)
• Same series designation (Datamate L-Tek)

The M80-8500645 represents an active product status replacement for the obsolete B5741-206-F-N-2, with enhanced compliance and higher voltage rating capability.

Parameter Comparison

Engineering Selection Recommendations

The M80-8500645 is the appropriate substitute for the obsolete B5741-206-F-N-2. Both connectors maintain identical mechanical and electrical compatibility across all critical mating parameters, ensuring direct interchangeability in existing PCB designs and cable assemblies.

The M80-8500645 offers significant advantages for new designs and ongoing support:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the B5741-206-F-N-2 is RoHS non-compliant
• Elevated voltage rating (800V versus 120V) provides enhanced capability for higher-voltage applications while maintaining backward compatibility with 120V designs
• Identical contact post length specifications (0.118" / 3.00mm) and mating contact geometry ensure mechanical fit within existing assemblies

For applications currently using the B5741-206-F-N-2, transition to M80-8500645 requires no PCB layout modifications or mechanical redesign.

Frequently Asked Questions (FAQ)

Q: Can M80-8500645 be used as a direct replacement for B5741-206-F-N-2 in existing designs?

A: Yes. Both connectors share identical pitch spacing (0.079" / 2.00mm), row configuration (2 rows), position count (6), mounting type (through hole), and contact geometry. No PCB layout or mechanical modifications are required.

Q: What are the key differences between these two connectors?

A: The primary differences are product status (M80-8500645 is active; B5741-206-F-N-2 is obsolete), regulatory compliance (M80-8500645 is ROHS3 compliant; B5741-206-F-N-2 is not), and voltage rating (M80-8500645 is rated 800V; B5741-206-F-N-2 is rated 120V). All mechanical and mating electrical parameters remain identical.

Q: Does the higher voltage rating of M80-8500645 affect compatibility?

A: No. The higher voltage rating (800V) is a capability enhancement that does not affect mechanical fit or electrical compatibility with 120V applications. The connector operates safely at any voltage up to its rated maximum.

Q: Are there packaging differences between these parts?

A: The M80-8500645 is supplied in tube packaging, whereas packaging information for B5741-206-F-N-2 is not specified. This affects handling and storage but does not impact functional compatibility.

Q: What is the contact post length difference, and does it matter?

A: The B5741-206-F-N-2 has a contact post length of 0.051" (1.30mm), while the M80-8500645 has 0.118" (3.00mm). Both are compatible with standard through-hole PCB designs. The longer post on M80-8500645 provides additional engagement depth and is suitable for thicker PCB assemblies.