---
title: "M8 Connectors vs. M12 Connectors: How They Compare | iCONN Systems"
description: The team at iCONN Systems can provide diverse products to our customers, including M8 connectors and M12 connectors. Check out our post on M8 vs. M12 connectors to see how they differ.
image: https://www.iconnsystems.com/hubfs/Overmold.jpg
---
[ Call Us: 630-827-6000](tel:630-827-6000)
[CONTACT US](https://www.iconnsystems.com/contact)
[PRODUCT CONFIGURATOR](https://www.iconnsystems.com/blog/m8-connectors-vs-m12-connectors#)
## CONNECTOR INSIGHTS FROM ICONN
# M8 Connectors vs. M12 Connectors: How They Compare
Posted by [Evan Freemon](https://www.iconnsystems.com/blog/author/evan-freemon) on August 28, 2024 | Updated on November 14, 2025
- 
- 
Having the right components in place is essential for getting a job done, and with many connector types available it’s important to know the distinctions between the various options.
When it comes to M12 vs. M8 connectors, there are certainly many overlapping attributes, but there are also some key differences. Let’s take a look at how M8 and M12 connectors differ, how they are utilized, best practices for operation, and everything that iCONN Systems can provide for your operations.
## What Is the Difference Between M8 and M12 Connectors?
M12 and M8 connectors facilitate the transfer of data in a system, so ensuring use of the correct connector is key for the proper transfer of information.
M12 connectors utilize a 12 mm threaded, circular head that delivers a robust, but flexible, connection to a variety of other types of equipment. Developed for application in [environments that lead to corrosion](https://www.iconnsystems.com/marine), the design of M12 connectors inhibits such issues. Settings that necessitate significant data transfer rates are also prime uses of M12 connectors. These connectors often feature 2, 3, 4, 5, 6, 8, 12, or 17 pins to fit accompanying holes.
M8 connectors, meanwhile, feature an 8 mm circular head and are often employed in [many industrial settings](https://www.iconnsystems.com/industrial-cable-assemblies). Their use overlaps with M12 connectors in many ways, but because of their smaller footprint, via the 8 mm housing, they may be more preferable in some cases. These connectors often feature 3, 4, 5, 6, or 8 pins to fit accompanying holes. Male and female and straight and angled options are available.
### Applications: What Are M8 Connectors Used For?
M8 connectors are primarily utilized within industrial automated systems, where they link actuators, [sensors](https://www.iconnsystems.com/sensors), switches, and other components. Settings that necessitate a lightweight connector or those with minimal space are ideal candidates for M8 connectors, which is one of the reasons they are often employed in projects [within the automotive field](https://www.iconnsystems.com/connectivity-solutions-transportation).
Other notable industries that use M8 connectors include HVAC, textile and printing, food and beverage processing, machine building, rubber and plastics, and many more.
### Applications: What Are M12 Connectors Used For?
As noted above, M12 connectors were designed for utilization in corrosive environments, and also help in [applications that require significant data transfer](https://www.iconnsystems.com/communications). Often used within industrial automation settings, these connectors are put to use in applications relating to actuators, sensors, Profibus, Fieldbus, industrial Ethernet, and more.
Due to their rugged construction, dependability, and small size, M12 connectors are particularly prized within the industry, being high among the most utilized components.
## Size and Design: M8 vs. M12 Connectors
As industry veterans are aware, the “M” of these connectors’ names indicates “metric,” with the accompanying number describing the connector head’s diameter size in millimeters.
The M12 connector has become something of a classic within the field, with its popularity leading to the development of varied pin structures to facilitate diverse applications. M8 connectors, meanwhile, are known for their resistance to shock, vibration, and moisture, making them the connectors of choice in harsh environments that would pose significant problems for other types.
### M8 and M12 Connector Coding Designations
Coding for M8 and M12 connectors is broken down into the classifications of A, B, C, D, and X. “A Coded” connectors feature a variable number of pins and are usually employed in lower-power settings. Due to its ubiquity and ease of use, A Coding is the default. “B Coded” connectors, meanwhile, are utilized for network cables for Fieldbus applications.
“C Coded” connectors are not as common as their A and B counterparts, but are used with AC sensors and actuators. “D Coded” connectors are utilized within Ethernet and ProfiNet systems, transferring data up to 100 megabytes. Lastly, “X Coded” connectors are a newer development within the space, being able to facilitate the transfer of data in the gigabyte range.
## M8 vs. M12: Choosing the Right Connector from iCONN Systems
iCONN Systems provides [M8 connector](https://www.iconnsystems.com/product-configurator) and [M12 connector](https://www.iconnsystems.com/product-configurator) options via our [iSENSOR](https://www.iconnsystems.com/isensor-connector-series) i8 series and our iSENSOR i12 series.
Our i8 series features:
- Straight and right-angle overmolded plug options
- Rear- and front-mount panel mount receptacles
- A, B, and D code options
- Nickle-plated brass, stainless-steel, or PVC components
- Snap lock or threaded couplings
- [IP67 ingress protections](https://www.iconnsystems.com/blog/understanding-the-ip-ratings-chart)
- Voltage rating up to 300V
- Amperage rating up to 7.5A
Our i12 series features:
- Straight and right-angle overmolded plug options
- Front-mount panel mount receptacles
- A, B, and C code options
- Nickle-plated brass or stainless-steel components
- Threaded couplings
- IP67/IP69K ingress protection
- Voltage rating up to 300V
- Amperage rating up to 7.5A
Along with all of this, our team is [adept at creating custom connectors](https://www.iconnsystems.com/custom-connector-design) as well, so if your project requires a specialized component, be sure to reach out to us so we can assess your needs and deliver the ideal part.
## Deciding Between M12 vs. M8 Connectors for Your Project? Let Us Help!
If you have a project that could utilize M12 or M8 connectors but you’re unsure of which option would provide the most benefit in your specific case, [contact our expert team](https://www.iconnsystems.com/contact). We look forward to assisting you.
Find the author on:
[LinkedIn](https://www.linkedin.com/in/evan-freemon-58b82160/)
- [Tweet](https://twitter.com/share)
### Request a Quote
Fill out the form below or call us at [(630) 827-6000](tel:6308276000).
### search the blog
[](https://cta-redirect.hubspot.com/cta/redirect/203881/78f23be9-3b43-4f56-aa26-54f409484f83)
#### visit the iconn knowledge center
[](https://cta-redirect.hubspot.com/cta/redirect/203881/c7c7eae5-0868-444a-9cae-0f94319c4313)
### Topics
- [iCONN Systems (21)](https://www.iconnsystems.com/blog/topic/iconn-systems)
- [Cable Assemblies (20)](https://www.iconnsystems.com/blog/topic/cable-assemblies)
- [Connectors (18)](https://www.iconnsystems.com/blog/topic/connectors)
- [Interconnect Solutions (10)](https://www.iconnsystems.com/blog/topic/interconnect-solutions)
- [Quality Improvement (9)](https://www.iconnsystems.com/blog/topic/quality-improvement)
- [Shielded Cables and Connectors (8)](https://www.iconnsystems.com/blog/topic/shielded-cables-and-connectors)
- [Overmolding (6)](https://www.iconnsystems.com/blog/topic/overmolding)
- [NiobiCONN (5)](https://www.iconnsystems.com/blog/topic/niobiconn)
- [Ampacity (4)](https://www.iconnsystems.com/blog/topic/ampacity)
- [Molding (3)](https://www.iconnsystems.com/blog/topic/molding)
### SUBSCRIBE TO the iconn BLOG
iCONN Systems, LLC is a [custom](https://www.iconnsystems.com/custom-connector-design) engineered interconnect solutions design company that focuses on the manufacturing of electrical and electronic [connectors](https://www.iconnsystems.com/niobium-connectors), [overmolded](https://www.iconnsystems.com/blog/overmolding) and discrete cable assemblies and value added turnkey products.
Visit our sister company [Mechanical Products,](https://www.mechprod.com/) America's leading manufacturer of thermal circuit protection devices
###### Stay Connected
Keep up-to-date with industry news and new products from iCONN
- [](https://x.com/iCONNSystems)
- [](https://www.facebook.com/iconnsystems/)
- [](https://www.linkedin.com/company/iconn-systems/)
- [](https://www.youtube.com/channel/UC1RcM2vUqPKiqXFYVwFbvUw)
iconn systems, LLC 1110 N. Garfield Street Lombard, IL 60148
Copyright © 2026 iCONN Systems LLC., All Rights Reserved.
[Terms & Conditions](https://www.iconnsystems.com/terms) | [Privacy Policy](https://www.iconnsystems.com/privacy)
[ ](https://www.thomasnet.com/profile/30189404?src=tnbadge)
×
  
```json
{
"@context" : "https://schema.org",
"@type" : "BlogPosting",
"author" : {
"@type" : "Person",
"name" : "Evan Freemon",
"url" : "https://www.iconnsystems.com/blog/author/evan-freemon"
},
"dateModified" : "2025-11-14T11:12:56.345Z",
"datePublished" : "2024-08-28T17:44:49.000Z",
"headline" : "M8 Connectors vs. M12 Connectors: How They Compare | iCONN Systems",
"image" : [ "https://www.iconnsystems.com/hubfs/Overmold.jpg" ],
"mainEntityOfPage" : {
"@id" : "https://www.iconnsystems.com/blog/m8-connectors-vs-m12-connectors",
"@type" : "WebPage"
},
"publisher" : {
"@type" : "Organization",
"logo" : {
"@type" : "ImageObject",
"url" : "https://www.iconnsystems.com/hs-fs/file-1663861757-png/2014/images/logo_med.png"
},
"name" : "iCONN Systems LLC"
}
}
```
```json
{
"@context" : "https://schema.org/",
"@type" : "Article",
"author" : {
"@type" : "Person",
"name" : "Evan Freemon"
},
"dateModified" : "2023-12-26",
"datePublished" : "2019-04-05",
"description" : "Simply put, overmolding is an injection molding process in which two or more materials are used to combine the wire and connector to create a single part. To do this, the cable assembly is placed inside a mold. The first material (the substrate) is covered by the other materials in this process. The overmolding process requires a rigid plastic component to be overlaid with a TPU layer or other overmold materials using either the insert molding (a single shot) or multiple-shot molding (two-shot) technique.",
"headline" : "WHAT IS OVERMOLDING, AND WHY IS IT IMPORTANT?",
"image" : {
"@type" : "ImageObject",
"height" : "800",
"url" : "https://www.iconnsystems.com/hs-fs/hubfs/Overmold.jpg?width=1398&height=800&name=Overmold.jpg",
"width" : "1398"
},
"mainEntityOfPage" : {
"@id" : "https://www.iconnsystems.com/blog/overmolding",
"@type" : "WebPage"
},
"publisher" : {
"@type" : "Organization",
"logo" : {
"@type" : "ImageObject",
"height" : "",
"url" : "",
"width" : ""
},
"name" : "iCONN Systems"
}
}
```
```json
{
"@context" : "https://schema.org/",
"@type" : "WebSite",
"name" : "iCONN Systems",
"potentialAction" : {
"@type" : "SearchAction",
"query-input" : "required name=search_term_string",
"target" : "{search_term_string}"
},
"url" : "https://www.iconnsystems.com/"
}
```
```json
{
"@context": "https://schema.org",
"@type": "FAQPage",
"mainEntity": [{
"@type": "Question",
"name": "What is overmolding?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Simply put, overmolding is an injection molding process in which two or more materials are used to combine the wire and connector to create a single part. To do this, the cable assembly is placed inside a mold. The first material (the substrate) is covered by the other materials in this process. The overmolding process requires a rigid plastic component to be overlaid with a TPU layer or other overmold materials using either the insert molding (a single shot) or multiple-shot molding (two-shot) technique.
Overmolding or overmolded cables are full assemblies that combine the wire and connector into one single, seamless piece. To do this, the cable assembly is placed inside a mold. Next, a molten plastic material is injected into the mold cavity. Once the plastic material cools and solidifies, it conforms to the shape of the mold and encapsulates the junction point between the connector and wire."
}
},{
"@type": "Question",
"name": "What are the benefits of overmolding?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Collectively, all the advantages of overmolding boil down to two things: greater lifespan and reliability. Overmolding shields internal components, fortifies protective qualities and helps cable assemblies survive in even the most rugged environments. By overmolding your cable assemblies, you will:
Increase the flexibility at the cable exit, where most of the movement between a cable and connector takes place
Provide resistance to abrasion and shock or impact
Make cable assemblies tamper-proof by encapsulating components beneath a sealed resin
Provide 360-degree strain relief and increased pull strength
Create a water-resistant or water-tight seal that qualifies cable assemblies for IP certification
Improve the overall quality, appearance and feel of cable assemblies, replacing the need for expensive metal backshells
Simplify installation by creating a one-piece assembly with keys that act as visual indicators to assist in the mating of each pair
Reduce human error"
}
}]
}
```
```json
{
"@context" : "https://schema.org/",
"@type" : "Person",
"image" : "https://media.licdn.com/dms/image/C4E03AQEKR-u9sIsdIw/profile-displayphoto-shrink_400_400/0/1628731648586?e=1709164800&v=beta&t=xCNAg-6qWuGY_iCPAKGXsxgDzLDUqh_PtumfMeqck9A",
"jobTitle" : "Sales/Account Manager",
"name" : "Evan Freemon",
"sameAs" : "https://www.linkedin.com/in/evan-freemon-58b82160/",
"url" : "https://www.iconnsystems.com/blog/author/evan-freemon",
"worksFor" : {
"@type" : "Organization",
"name" : "iCONN Systems"
}
}
```