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2.54mm Pitch Feed Through IDC M2051-N

M2051-N is a standard 2.54mm pitch feed-through IDC connector engineered for continuous daisy-chain wiring. Equipped without polarizing tabs to offer greater mating flexibility. It adopts insulation displacement connection for solderless wire termination, perfectly compatible with M2545 vertical and M2545R right angle PCB headers for wire-to-board assembly and M2053 series dust cover to shield terminals against dirt and moisture. UL94V-2 flame retardant housing and tin-plated copper contacts ensure stable electrical performance for industrial & home appliance wiring harnesses.
  • Fully RoHS & REACH Compliant
  • UL&cUL Certified
  • UL 94V-2 Flame Retardant Housing
Availability:
Quantity:
  • M2051-N

  • HRB

  • 8536909000

2.54 Pitch IDC Feed Through IDC without Polarizing Tabs


HRB P/N definition

M2051-N

    ① ② ③④

①M2051: HRB series 

②Without R(Blank): Feed through 180°

③N: Number of pins: 2-24

Without R(Blank): Without polarizing tabs


M2051-N dimensions

M2051-N IDC dimension


Part No.
Dimensions Part No.
Dimensions Part No.
Dimensions
UL94V-2 Circuits Dim: A Dim: B UL94V-2 Circuits Dim: A Dim: B UL94V-2 Circuits Dim: A Dim: B
M2051-2 2 2.54 5.08 M2051-10 10 22.86 25.40 M2051-18 18 43.18 45.72
M2051-3 3 5.08 7.62 M2051-11 11 25.40 27.94 M2051-19 19 45.72 48.26
M2051-4 4 7.62 10.16 M2051-12 12 27.94 30.48 M2051-20 20 48.26 50.80
M2051-5 5 10.16 12.70 M2051-13 13 30.48 33.02 M2051-21 21 50.80 53.34
M2051-6 6 12.70 15.24 M2051-14 14 33.02 35.56 M2051-22 22 53.34 55.88
M2051-7 7 15.24 17.78 M2051-15 15 35.56 38.10 M2051-23 23 55.88 58.42
M2051-8 8 17.78 20.32 M2051-16 16 38.10 40.64 M2051-24 24 58.42 60.96
M2051-9 9 20.32 22.86 M2051-17 17 40.64 43.18




Key Features

  • Standard 2.54mm pitch IDC, fits AWG22-26 discrete conductors

  • Feed-through design enables daisy-chain mid-cable wiring

  • No polarizing tabs offers greater mating flexibility 

  • IDC solder-free termination, quick tool-free assembly

  • Matches M2545 vertical and M2545R right angle PCB header for wire-to-board connection

  • Fits M2053 cover to protect contacts against dust & moisture

  • UL94V-2 flame retardant housing, RoHS compliant


Mating diagram

  • Designed to pair with M2053 series housing covers, effectively preventing dust, moisture and foreign debris from damaging exposed contact terminals.

  • M2051-N: Indirect PCB mating; mates with M2545 and M2545R series PCB headers to achieve reliable wire-to-board interconnection.

2.54 pitch ITW equivalent IDC mating

2.54 IDC mating






Current Rating
3A AC DC
Voltage Rating
250V AC DC
Operating Temperature
-25 ºC to +85 ºC
Contact Resistance
10mΩ max
Insulation Resistance
1000MΩ min.
Withstanding Voltage
750V AC/minute
Material
Housing: Nylon 66 UL94V-2
Terminal: Brass
Terminal Finish
Tin-plated
Gold-plated
Orientation
180°
Wire Size
AWG22
AWG24
AWG26

Frenquently Asked Questions


Technical FAQs


Q1: What wire gauge fits M2051-N feed through IDC?

A: Designed for AWG22~26 discrete single conductors, standard 2.54mm pitch.

Q2: What are the differences in Application: With vs Without Polarizing Tabs?

Answers are below:

①With Polarizing Tabs

  • Features integrated polarization tabs that ensure correct mating orientation.

  • Prevents incorrect insertion and reduces the risk of miswiring or connection errors.

  • Recommended for applications where reliable, error-free assembly is critical.

  • Available with integrated polarization tabs to prevent incorrect mating and ensure proper connector orientation during assembly

②Without Polarizing Tabs

  • Standard connector design without polarization features.

  • Offers greater mating flexibility but requires proper alignment during installation.

  • Suitable for applications where connector orientation is clearly identified and the risk of mis-mating is low.

  • Non-polarized versions are also available for applications where keying is not required.

Note: Electrical & IDC crimp performance are identical for both versions.


Q3: Can this IDC mate with PCB header directly?
A: Indirect PCB connection only, pair with M2545 vertical and M2545R right angle PCB header for wire-to-board assembly.
Q4: Is matching protective cover available?
A: Compatible with M2053 series cover to shield pins from dust, moisture and debris.
Q5: Material & flammability grade of insulator housing?
A: UL94V-2 flame retardant nylon; tin-plated copper alloy contacts, RoHS compliant.
Q6: Can it realize middle-of-cable feed-through daisy chain wiring?

A: Yes, feed-through structure allows continuous in-line wiring without cutting finished harness.


Q7: What are the advantages of a 180° IDC Feed through connector?

A: Key benefits include:

  • Supports daisy-chain wiring, allowing multiple connectors to be installed on a single cable assembly.

  • Reduces cable and assembly costs by minimizing the number of separate cable harnesses required.

  • Ideal for bus architectures and distributed I/O systems.

  • Simplifies field maintenance, as individual devices can often be disconnected without replacing the entire cable assembly.

Typical applications: Industrial I/O modules, LED display systems, control networks, and multi-board assemblies.


Q8: Which connector type should I choose, closed end IDC or feed through IDC?

A: Selection depends on your application requirements:

ApplicationRecommended Connector
Point-to-point connections90° IDC Closed End
Space-constrained designs90° IDC Closed End
High-vibration environments90° IDC Closed End
Daisy-chain wiring180° IDC Feedthrough
Multi-board systems180° IDC Feedthrough
Bus or distributed I/O architectures180° IDC Feedthrough
Cost-sensitive cable assemblies180° IDC Feedthrough


Order FAQs


Q1: Available pin counts for M2051-N series?

A: Standard range from 2P to 24P, customized pin positions negotiable upon bulk order.
Q2: What’s your MOQ for regular stock items?
A: Small MOQ for in-stock specs; customized color/spec needs higher minimum order quantity.
Q3: Lead time for sample & mass production?
A: Samples ship within 1~3 working days; bulk orders around 7~15 working days based on quantity.
Q4: Can we customize housing color or contact plating?
A: Custom black/other housing color, gold plating contacts available for large-volume orders.
Q5: Are free samples available for customer test?
A: Free small quantity samples offered, buyer covers international courier freight.



Widely used in industrial control, power supply, home appliance, LED lighting and consumer electronics internal interconnection.

  • Industrial control equipment & instrumentation

  • Power supply and driver modules

  • Household appliances & smart home devices

  • LED lighting and control wiring

  • Office automation & small consumer electronics

  • Internal daisy-chain wire harness interconnection



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