B5741-212-F-N-2 Equivalent & Substitute Parts

Part Overview

The B5741-212-F-N-2 is a 12-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 mating. This connector features gold-plated contacts, through-hole solder termination, and a locking ramp fastening mechanism. The part is currently obsolete, making identification of active equivalent components essential for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	12
Pitch - Mating	0.079" (2.00mm)
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Locking Ramp
Contact Finish - Mating	Gold
Operating Temperature Range	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
Contact Material	Beryllium Copper
Series	Datamate L-Tek

Substitute Part Grouping Explanation

The M80-8501245 qualifies as a direct substitute for the B5741-212-F-N-2 based on the following critical parameters:

Connector Configuration: Both are 12-position receptacle connectors with identical pitch (0.079" / 2.00mm) and row spacing
Mating Interface: Both feature female socket contacts with gold plating on the mating surface
Mounting and Termination: Both use through-hole solder termination with locking ramp fastening
Contact Material: Both utilize beryllium copper contacts with gold finish
Environmental Rating: Both maintain -55°C ~ 125°C operating temperature range and UL94 V-0 flammability rating
Series Compatibility: Both belong to the Datamate L-Tek series from Harwin Inc.

The M80-8501245 represents an active production alternative to the obsolete B5741-212-F-N-2, with enhanced compliance status and improved inventory availability.

Parameter Comparison

Parameter	B5741-212-F-N-2	M80-8501245
Manufacturer	Harwin Inc.	Harwin Inc.
Series	Datamate L-Tek	Datamate L-Tek
Product Status	Obsolete	Active
Connector Type	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket
Number of Positions	12	12
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Locking Ramp	Locking Ramp
Contact Finish - Mating	Gold	Gold
Contact Finish Thickness - Mating	12.0µin (0.30µm)	12.0µin (0.30µm)
Insulation Color	Black	Black
Insulation Height	0.202" (5.14mm)	0.202" (5.14mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Material	Beryllium Copper	Beryllium Copper
Contact Finish - Post	Gold	Gold
Applications	Automotive, General Purpose, Military	Automotive, General Purpose, Military
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040
Voltage Rating	120V	800V
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Tube
Inventory Status	612 Pcs New Original In Stock	6651 Pcs New Original In Stock

Engineering Selection Recommendations

The M80-8501245 is the recommended substitute for the obsolete B5741-212-F-N-2. Both connectors maintain identical mechanical and electrical mating interfaces, ensuring direct compatibility in existing PCB layouts and cable assemblies.

The M80-8501245 offers the following advantages:

Active Production Status: The M80-8501245 is in active production, ensuring long-term availability and supply chain continuity
Enhanced Compliance: ROHS3 compliance status provides regulatory advantage over the non-compliant B5741-212-F-N-2
Improved Voltage Rating: The 800V rating of M80-8501245 exceeds the 120V rating of the original part, providing greater design margin for applications requiring higher voltage isolation
Superior Inventory: Significantly higher stock levels (6651 units) support immediate procurement requirements

Selection of M80-8501245 maintains full functional and mechanical compatibility while providing improved compliance and supply security.

Frequently Asked Questions (FAQ)

Q: Are B5741-212-F-N-2 and M80-8501245 mechanically interchangeable?

A: Yes. Both connectors share identical pitch (0.079" / 2.00mm), row spacing, mounting type (through-hole), and fastening mechanism (locking ramp). PCB footprints and mating interfaces are identical.

Q: What is the primary difference between these two connectors?

A: The M80-8501245 is the active production equivalent of the obsolete B5741-212-F-N-2. Key differences include product status (active vs. obsolete), RoHS compliance (ROHS3 vs. non-compliant), voltage rating (800V vs. 120V), and packaging format (tube).

Q: Can M80-8501245 be used in applications originally designed for B5741-212-F-N-2?

A: Yes. The M80-8501245 maintains all critical electrical and mechanical parameters required for direct substitution. The higher voltage rating and improved compliance status make it suitable for the same applications.

Q: What is the difference in contact post length between these parts?

A: The B5741-212-F-N-2 has a contact post length of 0.051" (1.30mm), while the M80-8501245 has 0.118" (3.00mm). This difference does not affect mating compatibility but may impact PCB design considerations for solder joint formation and mechanical support.

Q: Are there packaging differences?

A: The M80-8501245 is supplied in tube packaging, while the B5741-212-F-N-2 packaging is not specified. Tube packaging is standard for production quantities and does not affect connector functionality.

Q: Which part should be selected for new designs?

A: The M80-8501245 should be selected for all new designs. As the active production part with ROHS3 compliance and superior voltage rating, it provides better long-term support and regulatory alignment.

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