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IDC Connector 2.54 Pitch Closed End 90 Degree with Polarizing Tabs

The HRB M2050-N-C-R(90°) is a 2.54mm pitch closed‑end IDC connector designed for wire‑to‑wire connections using insulation displacement technology (IDT). It is suitable for discrete cables with wire sizes AWG22 to AWG26, featuring a closed‑end housing for cable end assembly and right‑angle orientation for space‑saving routing. The contacts are made of brass with tin or gold plating; the insulator is UL94V‑2 flame retardant and RoHS compliant. Ideal for industrial, home appliance, and consumer electronics applications.
 
  • Fully RoHS & REACH Compliant
  • UL&cUL Certified
  • UL 94V-2 Flame Retardant Housing
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  • M2050-N-C-R(90°)

  • HRB

  • 8536909000

2.54 Pitch IDC Closed End IDC with Polarizing Tabs

HRB P/N definition

M2050-N-C-R(90°)

    ①     ② ③④  ⑤

①M2050: HRB series 

②N: Number of pins: 2-24

③C: Housing color, see below chart explanation

④R: With polarizing tabs

⑤90°: Closed End

C Housing color Wire size
R Red AWG22
W White AWG24
N Natural AWG24
B Black AWG24
b blue AWG26
G Green AWG26


M2050-N-C-R(90°) dimensions

IDC M2050-N-C-R(90°) dimensions

Part No.
Dimensions Part No.
Dimensions
UL94V-2 Circuits Dim: A Dim: B UL94V-2 Circuits Dim: A Dim: B
M2050-2-C-R(90°) 2 2.54 5.08 M2050-10-C-R(90°) 10 22.86 25.40
M2050-3-C-R(90°) 3 5.08 7.62 M2050-11-C-R(90°) 11 25.40 27.94
M2050-4-C-R(90°) 4 7.62 10.16 M2050-12-C-R(90°) 12 27.94 30.48
M2050-5-C-R(90°) 5 10.16 12.70 M2050-13-C-R(90°) 13 30.48 33.02
M2050-6-C-R(90°) 6 12.70 15.24 M2050-14-C-R(90°) 14 33.02 35.56
M2050-7-C-R(90°) 7 15.24 17.78 M2050-15-C-R(90°) 15 35.56 38.10
M2050-8-C-R90°) 8 17.78 20.32 M2050-16-C-R(90°) 16 38.10 40.64
M2050-9-C-R(90°) 9 20.32 22.86 M2050-17-C-R(90°) 17 40.64 43.18


Key Features


  • Polarizing tabs help prevent incorrect mating by enforcing a specific connector orientation.

  • IDC termination allows quick, solder-free assembly.

  • Positive alignment improves connection reliability.

  • Reduces risk of mismatching during installation.

  • Compatible with standard 2.54 IDC connector systems.

  • Robust housing provides secure cable retention.

  • UL94V-2 flame retardant housing, RoHS compliant

Mating diagram

  • Designed to pair with M2052R series housing covers, effectively preventing dust, moisture and foreign debris from damaging exposed contact terminals.

  • M2050-N-C(90°): Indirect PCB mating; mates with M2545 and M2545R series PCB headers to achieve reliable wire-to-board interconnection.2.54 IDC mating

    2.54 IDC mating




Engineering FAQs


Q1: What wire sizes are supported by 2.54 IDC connectors?

A: Typically supports 22–26 AWG, depending on the specific part number.

Q2: Is soldering required for termination?

A: No. IDC technology provides a solder-free wire termination process.

Q3: What is the function of the closed end IDC design?

A: The closed-end IDC prevents wire strands from slipping out, avoids short circuits, improves connection reliability, and also provides better protection against dust and accidental contact.

Q4: What are the design implications of using 2.54 IDC closed end with polarizing tabs?
A: Using 2.54mm closed-end IDC with polarizing tabs brings the following design implications:

①The polarizing tabs prevent incorrect mating and reverse insertion, avoiding reverse connection and electrical faults.

②Closed-end IDC enhances wire retention, stops strand extrusion and short circuits, improving connection safety and reliability.

③The combined structure increases mould complexity and dimensional tolerance requirements for housing and terminals.

④It restricts assembly orientation, so layout and assembly sequence need to be fully considered in product design.

Q5: Are special tools required for assembly?

A: Hand tools or bench termination tools are recommended for consistent wire insertion.

Q6: What applications are these connectors commonly used in?

A: Industrial controls, appliances, instrumentation, and low-voltage electronic systems.



Procurement FAQs


Q1: What are the main benefits of IDC connectors compared to crimp solutions?
A: Faster assembly, fewer components, and reduced labor costs.

Q2: Are closed end and polarized versions available in multiple circuit counts?

A: Yes. Various positions and configurations are available to meet different design requirements.

Q3: Can these connectors help reduce assembly time?

A: Yes. IDC termination enables rapid mass termination without wire stripping.

Q4: Are polarized versions interchangeable with standard 2.54 IDC connectors?

A: They are designed for compatibility within the 2.54 IDC system while adding mating protection.

Q5: What factors should be considered when selecting a connector?

A: Circuit count, wire gauge, polarization requirements, and application environment.

Q6: Are these connectors suitable for high-volume production?

A: Yes. Their simple termination process supports efficient large-scale manufacturing.



Current Rating
3A AC DC
Voltage Rating
250V AC DC
Operating Temperature
-25 ºC to +85 ºC
Contact Resistance
10mΩ max
Insulation Resistance
5000MΩ min.
Withstanding Voltage
750V AC/minute
Material
Housing: Nylon UL94V-2
Terminal: Brass
Terminal Finish
Tin-plated
Gold-plated
Orientation
90°
Wire Size
AWG22
AWG24
AWG26
download M2050 Product specification.pdf

Common Applications

1. Point-to-point wiring in electronics

  • Internal wiring of circuit boards in industrial or consumer equipment.

  • Example: connecting a control board to sensors or switches.

2. Industrial control and automation

  • PLCs (Programmable Logic Controllers) and I/O modules.

  • The polarizing tab ensures correct orientation in high-density panels.

3. Test equipment and prototyping

  • Quick, reversible connections to PCBs without soldering.

  • Often used in labs where boards are frequently swapped.

4. Computer and peripheral internal wiring

  • Legacy PC components and embedded systems.

  • Short ribbon cables to headers on daughterboards or connectors.

5. Point-of-sale or kiosk devices

  • Connecting displays, buttons, and small peripherals internally.

  • Polarizing tabs prevent field service mistakes.

6. Small appliances and electronics

  • Consumer devices that require fast, reliable internal wiring.

  • Vibration-resistant thanks to IDC design.


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