Pololu Basic SPDT Relay Carrier for "Sugar Cube" Relays

SKU: POLOLU-2479 Brand: Pololu

Retired Product

Search for an alternative

This product has been retired. It is no longer available, but this page has been kept for reference.

Dimensions (in mm) of “sugar cube” relay footprint on the Pololu basic SPDT relay carrier.

The Pololu basic relay carrier makes it easy to control a single-pole, double-throw (SPDT) power relay that has the common “sugar cube” pinout and footprint. This product is just the carrier board PCB assembled with all of its surface mount components, including a MOSFET for controlling the relay, indicator LEDs, and a flyback diode; it does not include a relay or connectors. This board is also available with 5 V and 12 V power relays (assembled or as a partial kit):

Alternatives available with variations in these parameter(s): voltage partial kit? Select variant…

The carrier board routes the three relay control pins to 0.1"-spaced pins compatible with standard solderless breadboads and female servo cable connectors. The relay switch pins are routed to a set of large pads intended for use with a 3-pin 5mm-pitch terminal block and a set of smaller pads with a 0.2" pitch, making them compatible with 0.1" perfboards. The carrier board has four mounting holes that work with #2 or M2 screws.

Advantages over similar products

Compact layout
Two LEDs to indicate coil actuation
Zener diode for fast current decay on relay coil
Specification of electrical routing clearance rules on relay switch nodes

Comparison to the dual-channel version

Pololu's basic relay carrier boards are available in single-channel and dual-channel versions. The single-relay carrier is less than half the size of the 2-channel carrier (due in part to its smaller mounting holes and lack of barrel jack footprints), so it might be more appropriate to use two single-channel boards instead of one 2-channel board in some space-constrained applications. The following table shows some of the key differences between the two versions:

	Voltage options	Board size	Mounting hole size	# of channels	DC power jack option
Single-relay carrier	5 V and 12 V	1.15" × 1"	0.086" (#2 or M2)	1	no
Dual-relay carrier	5 V and 12 V	1.5" × 1.8"	0.125" (#4 or M3)	2	yes

Using the relay module

Pololu basic SPDT relay carrier with 12 VDC relay (assembled).

The switch portion of the relay is accessible on one side of the board while the control pins are routed to the other. The relay coil is powered by supplying the appropriate coil voltage for your specific relay across the VDD and GND pins, and it is activated by a digital high control signal on the EN pin. The control signal is fed directly to a BSS138 N-channel MOSFET, which in turn actuates the relay coil when the control voltage exceeds approximately 2.5 V, up to a maximum of 20 V (see BSS138 datasheet (92k pdf) for details).

For radio control (RC) applications, please consider the Pololu RC Switch with Relay (also available as a “partial kit”;prod2805).

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. The copper traces are designed to be at least 45 mil (1.1 mm) from the board edges, 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.

Schematic diagram

Schematic diagram for the Pololu basic SPDT relay carrier.

This schematic is also available as a downloadable pdf (131k pdf).

People often buy this product together with:

Pololu Basic 2-Channel SPDT Relay Carrier for "Sugar Cube" Relays

Dimensions

Size:	1" × 1.15" × 0.1"
Weight:	2.4 g

Identifying markings

PCB dev codes:	rly01a
Other PCB markings:	0J7111, 0J7194

File downloads

Pololu basic SPDT relay carrier schematic diagram (131k pdf)

Printable schematic diagram for the Pololu basic SPDT relay carrier.
BSS138 N-channel MOSFET datasheet (92k pdf)
Dimension diagram of the Pololu Basic SPDT Relay Carrier with DC Relay (412k pdf)
3D model of the Pololu Basic SPDT Relay Carrier with DC Relay (4MB step)
Basic SPDT Relay Carrier for “Sugar Cube” Relays drill guide (28k dxf)

This DXF drawing shows the locations of all of the board’s holes.

This product is listed in:

Retired

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$6+ for Standard Post (typically 6+ business days, tracked)
$10+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$11+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!

Write Your Own Review