> **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 # Pololu Basic 2-Channel SPDT Relay Carrier with 5VDC Relays (Partial Kit) **Type:** Product page · **SKU:** POLOLU-2486 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/pololu-basic-2-channel-spdt-relay-carrier-with-5vdc-relays-partial-kit.html ([markdown](https://core-electronics.com.au/pololu-basic-2-channel-spdt-relay-carrier-with-5vdc-relays-partial-kit.html.md)) The Pololu basic 2-channel relay carrier modules allow simple, independent control of two single-pole, double-throw (SPDT) switches from low-voltage, low-current control signals. This item includes the basic carrier PCB along with two Omron G5LE-14-DC5 5 V relays, 5.0 mm terminal blocks, and 0.1" male headers in straight and right-angle versions. Surface-mount components are pre-assembled on the PCB, but the through-hole components are not installed. The included power relays are rated for up to 10 A under most conditions. ## Pricing - **Price:** $25.45 (inc GST) — $23.14 AUD, exc GST - **Quantity discounts:** 10+ $22.21 (exc GST) · 25+ $21.52 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 24 and Aug 25. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-2486:1` (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/POLOLU-2486:1.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 The Pololu basic 2-channel relay carrier modules make it easy to control two single-pole, double-throw (SPDT) switches independently from low-voltage, low-current control signals (or you can supply the same signal to both enable lines to operate this product as a DPDT relay switch). The modules are available with 5 V and 12 V power relays—Omron G5LE-14-DC5 and G5LE-14-DC12 (1MB pdf), respectively—and they are available pre-soldered or as partial kits that allow greater application flexibility: The carrier board routes the relay control pins to 0.1"-spaced pins compatible with standard [solderless breadboards](https://core-electronics.com.au/prototyping/breadboards.html) and [female servo cable connectors](https://core-electronics.com.au/category/112/servo-cables). The assembled version of this board has all seven control pins populated with [0.1" straight male headers](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-straight.html) while the partial kit version includes 25×1 straight and 15×1 [right angle](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-right-angle.html) 0.1" male header strips that can optionally be broken into pieces and soldered in. The relay switch pins are routed to a set of large pads intended for use with two [3-pin 5mm-pitch terminal blocks](https://core-electronics.com.au/screw-terminal-block-3-pin-5-mm-pitch-side-entry-4-pack.html) and a set of smaller pads with a 0.2" pitch, making them compatible with 0.1" perfboards. The assembled version of this board has the terminal blocks soldered to these pins while the partial kit version includes 6-pin terminal blocks that can be optionally soldered in. The carrier board has four mounting holes that work with #4 or M3 screws. **Advantages over similar products** - Compact layout - LEDs to indicate coil actuation - Zener diodes for fast current decay on relay coils - Specification of electrical routing clearance rules on relay switch nodes **Using the relay modules** The switch portion of the relays are accessible on one side of the board while the control pins are routed to the other. The relay coils are powered by supplying the appropriate coil voltage for your specific relays across the VDD and GND pins, and they are activated by digital high control signals on their respective EN pins. The control signals are fed directly to the BSS138 N-channel MOSFETs, which in turn actuate the relay coils when the signal voltage exceeds approximately 2.5 V, up to a maximum of 20 V (see BSS138 datasheet (92k pdf) for details). The control pins are arranged to allow for several connection options: a single 1×4 cable can be used to supply coil power and the two control signals, or two 1×3 cables (such as servo cables) can be used side-by-side (one for each relay). The relay switch terminals COM (common), NO (normally open), and NC (normally closed) are routed on the PCB with a minimum clearance of 60 mils (1.5 mm) from other copper and the edges of the board, though manufacturing variations in the board edges can make those distances slightly lower. In most applications, the current and voltage ratings for the module will match the ratings of the relay used. Maximum current, maximum voltage, and life expectancy are interdependent; Pololu therefore recommend careful examination of your relay’s datasheet. **Warning:** This product is not designed to or certified for any particular high-voltage safety standard. Working with voltages above 30 V can be extremely dangerous and should only be attempted by qualified individuals with appropriate equipment and protective gear. **Optional DC barrel jack** The carrier board makes it possible to optionally power the relays from a [DC barrel jack](https://core-electronics.com.au/dc-power-adapter-barrel-jack.html) (not included). The DC barrel jack can be placed in three configurations, two of which are shown in the pictures above (the jack can also be installed in one configuration on the bottom side of the PCB). **Schematic diagram** This schematic is also available as a downloadable pdf (144k pdf). **People often buy this product together with:** | [![0.1" (2.54mm) Crimp Connector Housing: 1x2-Pin 25-Pack](https://core-electronics.com.au/attachments/localcontent/0J1597_3580ef0a45.jpg)](https://core-electronics.com.au/0-1-2-54mm-crimp-connector-housing-1x2-pin-25-pack.html) | [0.1" (2.54mm) Crimp Connector Housing: 1x2-Pin 25-Pack](https://core-electronics.com.au/0-1-2-54mm-crimp-connector-housing-1x2-pin-25-pack.html) | |---|---| | [![0.1" (2.54mm) Crimp Connector Housing: 1x3-Pin 25-Pack](https://core-electronics.com.au/attachments/localcontent/0J1598_42959cf854.jpg)](https://core-electronics.com.au/0-1-2-54mm-crimp-connector-housing-1x3-pin-25-pack.html) | [0.1" (2.54mm) Crimp Connector Housing: 1x3-Pin 25-Pack](https://core-electronics.com.au/0-1-2-54mm-crimp-connector-housing-1x3-pin-25-pack.html) | |---|---| | [![Female Crimp Pins for 0.1" Housings 100-Pack](https://core-electronics.com.au/attachments/localcontent/0J2472_35509fe5b9.jpg)](https://core-electronics.com.au/female-crimp-pins-for-0-1-housings-100-pack.html) | [Female Crimp Pins for 0.1" Housings 100-Pack](https://core-electronics.com.au/female-crimp-pins-for-0-1-housings-100-pack.html) | |---|---| **Dimensions** | Size: | 1.8" × 1.5" × 0.9" | |---|---| | Weight: | 33 g | **General specifications** | Voltage: | 5 V | |---|---| | Partial kit?: | Y | **Identifying markings** | PCB dev codes: | rly02a | |---|---| | Other PCB markings: | 0J7344, 0J7772 | **File downloads** - **Pololu basic 2-channel SPDT relay carrier schematic diagram (144k pdf)** Printable schematic diagram for the Pololu basic 2-channel SPDT relay carrier. - **Omron G5LE single-pole 10A power relay datasheet (1MB pdf)** - **BSS138 N-channel MOSFET datasheet (92k pdf)** - **Dimension diagram of the Pololu Basic 2-Channel SPDT Relay Carrier (489k pdf)** - **3D models of the Pololu Basic 2-Channel SPDT Relay Carrier with DC Relays (6MB step)** - **Basic 2-Channel SPDT Relay Carrier for “Sugar Cube” Relays drill guide (65k dxf)** This DXF drawing shows the locations of all of the board’s holes. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/p/o/pololu_basic_2_channel_spdt_relay_carrier_with_5vdc_relays__partial_kit___pololu_2486__00.jpg)