what is the diameter of the pins?

standard pin size .1 works flawless with the pin headers on ardunio

Can these be broken into different length sets?

They can be broken to length, but it usually requires on pin to be sacrificed because it doesn't break cleanly. I recommend using a cutting tool rather than breaking by hand though.

Are pins on female suitable for thru-hole mounting on a pcb? what are the pin dimensions?

I believe the female pins will work fine in printed circuit boards that have plated through holes, with proper soldering techniques. These connectors appear to be the standard cut to length parts that you can adjust the number of pins by using an exacto knife to separated them. Doing this however sacrifices one pin position.

What is the current rating on these? Will these be okay for 2 Amps?

I doubt they can handle more than a breadboard - 500 mA.

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20PCS 2.54mm Breakaway PCB Board 40Pin Male and Female Header Connector for Arduino Shield

20PCS 2.54mm Breakaway PCB Board 40Pin Male and Female Header Connector for Arduino Shield

Product ID: 355410260

Details

Brand
OCR
Material
Plastic Metal
Number Of Circuits
40
UPC
704270440015
Manufacturer
OCR

📏2.54mm pin pitch precision

🔗40-pin male & female connectivity

✂️Customizable cut-to-length design

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Description

🔌 Connect like a pro, customize like a boss!

DUAL GENDER PACK - Includes 10 male and 10 female headers, ensuring versatile connectivity options in one kit.
PRECISION PIN PITCH - Engineered with a 2.54mm (0.1 inch) pitch for seamless Arduino and PCB integration.
TAILOR MADE LENGTHS - Easily snap and cut headers to your exact project specifications—no waste, all flexibility.
RELIABLE SIGNAL BRIDGE - Optimized for flawless current and signal transmission across isolated circuits.
PRO GRADE COMPATIBILITY - Perfect for electronics, meters, and appliances—your go-to connector for professional-grade projects.

This 20-piece set of 2.54mm pitch, 40-pin male and female breakaway header connectors offers precision, flexibility, and reliable signal bridging for Arduino shields and PCB projects. Designed for easy customization and broad compatibility, it’s the essential toolkit upgrade for any electronics professional or hobbyist aiming to elevate their circuit design.

Specifications

ASIN	B01MQ48T2V
Are batteries included?	No
Best Sellers Rank	#347,216 in Electronics ( See Top 100 in Electronics ) #680 in Audio & Video Adapters
Brand	OCR
Colour	Male and Female Header --20PCS
Customer Reviews	4.6 4.6 out of 5 stars (298)
Date First Available	23 October 2017
Item Dimensions LxWxH	10.3 x 1.1 x 0.1 Centimeters
Item Height	0.1 Centimeters
Item Weight	90.7 g
Item Width	1.1 Centimeters
Item model number	dz-pz-01
Manufacturer	Ocrtechci
Model number	dz-pz-01
Net Quantity	1.0 Count
Number of Memory Sticks	20
Product Dimensions	10.3 x 1.1 x 0.1 cm; 90.72 g

Reviews

C**S

19.03.2026

M**.

31.07.2023

J**T

13.02.2026

J**H

20.01.2026

R**W

30.06.2025

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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