The EC series connectors were introduced by Horizon Hobby many years ago. Due to their excellent current handling capability and ease of use, they have become widely adopted in the RC hobby over time, especially in RC cars and RC airplanes. So, what are the specific differences between the EC2, EC3, and EC5 connectors in the EC series?
Let’s dive into the details and compare them, as understanding this information can be very important, especially for those looking to further enhance the performance of their RC models.
Comparison Chart: EC2 and EC3 and EC5
There are many cloned versions of these connectors on the market, so the information provided here will be based on the specifications from Horizon Hobby.
| Connector | EC2 | EC3 | EC5 |
| Continuous Current | 20A | 60A | 120A |
| Burst Current | 40A | 75A | 150A |
| Max. Wire Gauge | 14AWG | 12AWG | 10AWG |
| Bullet Pin Diameter | 2mm | 3.5mm | 5mm |
| RC Car | 1/16 to 1/18 Scale | 1/10 to 1/12 Scale | 1/5 to 1/8 Scale |
| Size | Small | Medium | Large |
From the chart, it is clear that the biggest difference between these connectors is their current handling capability, which depends on the Bullet Pin Diameter. The larger the diameter, the stronger the current handling ability.
Matching the right connector and wire according to the battery’s continuous discharge current and burst current is crucial to maximize the battery’s discharge capability. (Note: In Wire Gauge, the smaller the number, the thicker the wire.)
Additionally, when choosing connectors, it’s also important to consider their size and weight and whether they impact the RC model. This is a detail not to be overlooked.
FAQs for EC2,EC3 and EC5
Q1: How long can they be used?
As long as they are not subjected to overheating (Operating temperature: -20 to 120°C) or over-voltage (Rated voltage: 500V), their cycles can be up to 1000.
Q2: What are the differences between EC2, EC3, EC5 and IC2, IC3, IC5?
IC2, IC3, and IC5 are the “Smart” versions of EC2, EC3, and EC5. These connectors have an additional pin for data transmission, allowing Spektrum ESCs and chargers to automatically recognize and store battery information. Moreover, IC2, IC3, and IC5 connectors have higher manufacturing costs, making EC2, EC3, and EC5 great alternatives.
Q3: How to match connectors?
Choose according to the continuous and burst current to be transmitted. Typically, they can handle short bursts of current; specifically, they can handle 40A, 75A, and 150A respectively.
