Equivalent & Substitute Parts for B5741-218-F-N-2

Part Overview

The B5741-218-F-N-2 is an 18-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 alternatives essential for ongoing system support and procurement.

Substiute Parts

B5741-218-F-N-2

Harwin Inc.In Stock: 1139B5741-218-F-N-2 Datasheet

Current PartRFQ

M80-8501845

Harwin Inc.In Stock: 1297M80-8501845 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The M80-8501845 qualifies as a direct substitute for the B5741-218-F-N-2 based on the following critical parameters:

• Identical connector type (receptacle) and contact type (female socket)
• Matching position count (18 positions) and row configuration (2 rows)
• Identical pitch specifications (0.079" / 2.00mm mating pitch 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 flammability rating (UL94 V-0)
• Same series designation (Datamate L-Tek)

The M80-8501845 represents an active product status alternative to the obsolete B5741-218-F-N-2, with enhanced compliance and higher voltage rating capability.

Parameter Comparison

Engineering Selection Recommendations

The M80-8501845 is the appropriate substitute for the obsolete B5741-218-F-N-2. Key advantages include:

• Active product status ensures ongoing availability and manufacturer support
• ROHS3 compliance versus non-compliant status of the original part
• Higher voltage rating (800V versus 120V) provides greater design margin for applications requiring elevated voltage tolerance
• Identical mechanical and electrical interface parameters guarantee direct form-fit-function compatibility
• Maintained UL94 V-0 flammability rating and operating temperature specifications

Selection of M80-8501845 is supported by regulatory compliance improvements and sustained product lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can M80-8501845 be used as a direct replacement for B5741-218-F-N-2 in existing designs?

A: Yes. Both connectors share identical connector type, position count, pitch spacing, mounting method, termination type, contact material, and operating temperature range. The M80-8501845 maintains full mechanical and electrical interface compatibility.

Q: What is the significance of the voltage rating difference between the two parts?

A: The B5741-218-F-N-2 is rated at 120V, while the M80-8501845 is rated at 800V. This difference reflects design improvements in the active product. Applications operating at or below 120V are fully compatible with either part. The higher rating of M80-8501845 provides additional design margin without compromising lower-voltage applications.

Q: Why is RoHS compliance important for this substitution?

A: The M80-8501845 carries ROHS3 compliance, whereas the B5741-218-F-N-2 is non-compliant. For applications subject to RoHS regulations or customer requirements, M80-8501845 is the required choice. For legacy systems without RoHS mandates, both parts remain functionally equivalent.

Q: Are there differences in contact post length between these parts?

A: Yes. The B5741-218-F-N-2 has a contact post length of 0.051" (1.30mm), while the M80-8501845 has 0.118" (3.00mm). This difference does not affect mating compatibility but may influence PCB layout considerations. Verify that your PCB design accommodates the longer post length of M80-8501845.

Q: What packaging is available for M80-8501845?

A: The M80-8501845 is supplied in tube packaging, whereas the B5741-218-F-N-2 packaging specification was not provided. Confirm packaging requirements for your procurement and assembly processes.