> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# 5V 4 Channel Relay Module 10A

**Type:** Product page · **SKU:** CE05279 · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia)
**Page:** https://core-electronics.com.au/5v-4-channel-relay-module-10a.html ([markdown](https://core-electronics.com.au/5v-4-channel-relay-module-10a.html.md))

A versatile relay board with opto-isolated inputs. Each channel can switch up to 10A @28VDC

## Pricing

- **Price:** $6.40 (inc GST) — $5.82 AUD, exc GST
- **Quantity discounts:** 5+ $5.70 (exc GST) · 15+ $5.53 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 91 today, and up to 300 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE05279:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/CE05279:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

A versatile relay board with opto-isolated inputs. Each channel can switch up to 10A@28VDC

**Features**

- While marked as requiring 5V supply and logic, we've found this board to work fine at 3.3V
- Features a jumper to disconnect the VCC line from the transistors driving the relays, effectively giving you a way to "dry-run" this module
- Features opto-isolators and transistors to drive the relay coils, meaning that you only need 2mA per pin on your microcontroller to drive it
 
**Specifications**

- Dimensions: 73mm x 54mm x 19mm
- Optoisolator/LED Current Draw: 2mA per relay
- Relay Coil Current Draw: 60mA per relay
 
**Dimensions**

**![](https://core-electronics.com.au/media/wysiwyg/4_channel_relay_dimensions_1.png)**

**Documents and Resources**

- [Relay Datasheet](https://core-electronics.com.au/attachments/uploads/Songle-SRD-Datasheet.pdf)
- [Transistor Datasheet](https://core-electronics.com.au/attachments/uploads/S8050-J3Y-Datasheet.pdf)
- [Optoisolator Datasheet](https://www.farnell.com/datasheets/73758.pdf)

## Guides for this product

- [Controlling a Solenoid with Raspberry Pi and a Relay](https://core-electronics.com.au/guides/raspberry-pi/solenoid-control-with-raspberry-pi-relay/)

## Videos for this product

- [Controlling a Solenoid with Raspberry Pi and a Relay](https://core-electronics.com.au/videos/controlling-a-solenoid-with-raspberry-pi-and-a-relay-)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/0/1/018-quadrelay_1.jpg)