---
product_id: 88053948
title: "Electronics-Salon Screw Terminal Block Breakout Module, for Arduino MEGA-2560 R3."
brand: "electronics-salon"
price: "HK$400"
currency: HKD
in_stock: true
reviews_count: 13
category: "Electronics Salon"
url: https://www.desertcart.hk/products/88053948-electronics-salon-screw-terminal-block-breakout-module-for-arduino-mega
store_origin: HK
region: Hong Kong
---

# Power-on LED indicator 3.5mm pitch screw terminals M2 steel screws & copper contacts Electronics-Salon Screw Terminal Block Breakout Module, for Arduino MEGA-2560 R3.

**Brand:** electronics-salon
**Price:** HK$400
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your Arduino game with pro-level connectivity—because your projects deserve the best!

## Quick Answers

- **What is this?** Electronics-Salon Screw Terminal Block Breakout Module, for Arduino MEGA-2560 R3. by electronics-salon
- **How much does it cost?** HK$400 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/88053948-electronics-salon-screw-terminal-block-breakout-module-for-arduino-mega)

## Best For

- electronics-salon enthusiasts

## Why This Product

- Trusted electronics-salon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quick Reset & ICSP Access:** Handy red reset button and ICSP header streamline your development workflow and firmware updates.
- • **Instant Visual Power Status:** Built-in LED keeps you informed at a glance—no more guesswork during critical debugging.
- • **Durable Industrial-Grade Build:** FR-4 fiberglass PCB with dual copper layers ensures longevity and stable performance under heavy use.
- • **Effortless Reliable Connections:** Say goodbye to flaky pin contacts with robust screw terminals designed for 26-16 AWG wires.
- • **Seamless Arduino MEGA Integration:** Specifically tailored for MEGA-2560 R3, making prototyping and repairs faster than ever.

## Overview

The Electronics-Salon Screw Terminal Block Breakout Module is a precision-engineered PCB mount accessory designed exclusively for Arduino MEGA-2560 R3. Featuring 3.5mm pitch screw terminals compatible with 26-16 AWG wires, M2 steel screws, copper contacts, and a power-on LED indicator, it offers a durable and reliable connection solution. Its FR-4 fiberglass dual-layer PCB and integrated reset button plus ICSP header make prototyping and maintenance effortless, elevating your electronics projects with professional-grade quality.

## Description

Terminal Block Breakout Module - for Arduino MEGA-2560 R3. the item has been soldered and assembled. Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper. With power on LED indicating. red reset button on the side. with a ICSP adapter connect header. FR-4 fiber glass PCB, dual copper layers. NOTE: the item not include Arduino Mega module

Review: Makes connections so easy! - I wish I'd have known about this years ago, because after so many projects struggling with reliable pin connections, this thing makes life so much easier! I've gone so far as to unsolder the built-in headers on Arduino Megas and soldering screw terminals for more reliable connections -- and this accomplishes the same thing but is much easier. If you happen to blow up your Mega, this also makes it easy to swap in a new one. COST is a big factor as it's expensive, but it's so well worth it to me! It's a very high-quality part as well. CAUTION: It's not always convenient to access the screws of a terminal when the one above it has already been wired -- especially with ferrules as I prefer to use. So you will save time by attaching your wires in an order to allows access to the screws near the bottom before adding wires above them.
Review: Good quality item - Worked perfectly. A bit expensive for my poor arse. But good quality.

## Features

- Terminal Block Breakout Module - for Arduino MEGA-2560 R3. the item has been soldered and assembled.
- Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper.
- With power on LED indicating. red reset button on the side. with a ICSP adapter connect header.
- FR-4 fiber glass PCB, dual copper layers.
- NOTE: the item not include Arduino Mega module

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07H9TJCWN |
| Best Sellers Rank | #37,407 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #45 in Ground Circuit Terminal Blocks |
| Brand | Electronics-Salon |
| Connector Type | Screw |
| Date First Available | October 20, 2016 |
| Gauge | 26.0 |
| Is Discontinued By Manufacturer | No |
| Item Pitch | 0.14 Millimeters |
| Item Weight | 3.52 ounces |
| Item model number | MD-D1236-1 |
| Manufacturer | Electronics-Salon |
| Material | Copper |
| Mounting Type | PCB Mount |
| Number Of Contacts | 12 |
| Number Of Poles | 24 |
| Package Dimensions | 4.76 x 3.19 x 1.34 inches |

## Product Details

- **Brand:** Electronics-Salon
- **Connector Type:** Screw
- **Gauge:** 26.0
- **Item Pitch:** 0.14 Millimeters
- **Manufacturer:** Electronics-Salon
- **Material:** Copper
- **Mounting Type:** PCB Mount
- **Number Of Contacts:** 12
- **Number Of Poles:** 24

## Images

![Electronics-Salon Screw Terminal Block Breakout Module, for Arduino MEGA-2560 R3. - Image 1](https://m.media-amazon.com/images/I/811aNsPjDqL.jpg)

## Questions & Answers

**Q: what represents tx and rx?  Is there a pinout mapping?**
A: The terminal block itself only has the numbered pin information on each screw terminal.  The Arduino Mega 2560 has 4 UARTs (8 pins) that can be used for external communication.  This link might help: https://www.electroschematics.com/7963/arduino-mega-2560-pinout/

**Q: Does this draw power from the Arduino or can a separate 5V be supplied to this board?**
A: It draws a very small amount of power (Only for the red LED) from the Arduino Board if you only works with. Also you can connect a external power supply through the dedicated terminals.It offers the same Arduino functionalities, but with a terminal block version.

**Q: Why are pins 14-21 and  0-1 red?**
A: Outside of the power pins being red, pins 0, 1 &14-21 are for serial communications pins (Tx & Rx) and that's all they can do.

**Q: How do you wire external power to this board? most hats have  a jumper to select mega power or external power with dedicated power inputs.**
A: There are several terminals for 3.3 and 5 volt connections.  There are also terminals for GND.  You can hook up whichever power you want.  If you use the barrel connector the terminals will have Mega power on them.  If you use an external supply that will power the Mega.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Makes connections so easy!
*by L***E on September 11, 2025*

I wish I'd have known about this years ago, because after so many projects struggling with reliable pin connections, this thing makes life so much easier! I've gone so far as to unsolder the built-in headers on Arduino Megas and soldering screw terminals for more reliable connections -- and this accomplishes the same thing but is much easier. If you happen to blow up your Mega, this also makes it easy to swap in a new one. COST is a big factor as it's expensive, but it's so well worth it to me! It's a very high-quality part as well. CAUTION: It's not always convenient to access the screws of a terminal when the one above it has already been wired -- especially with ferrules as I prefer to use. So you will save time by attaching your wires in an order to allows access to the screws near the bottom before adding wires above them.

### ⭐⭐⭐⭐⭐ Good quality item
*by C***Y on October 9, 2025*

Worked perfectly. A bit expensive for my poor arse. But good quality.

### ⭐⭐⭐⭐ Lots of well organized connections.
*by I***A on June 15, 2025*

I think this is a great addition to an Arduino Mega 2560 . There are 92 clearly marked and well organized terminals. They can take up to 18 AWG solid wire . The terminals are well oriented for ease of access. I do have one minor quibble. The 6-pin SPI connector ,that I use for programming, is a little bit off-center. This has required sanding the connector on one side with a Dremel. I don't know why the block was not centered.

## Frequently Bought Together

- Electronics-Salon Screw Terminal Block Breakout Module, for Arduino MEGA-2560 R3.
- Arduino Mega 2560 REV3 [A000067] – ATmega2560, 16MHz, 54 Digital I/O, 16 Analog Inputs, 256KB Flash, USB, Compatible with Arduino IDE for Advanced Projects
- ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-12*