What is part consignment? 

  • If you have received an email with consignment information or have a consignment tab on your order page, this means you have signaled the intent to consign one or multiple parts for your order - that is, you have indicated that you will be responsible for the purchasing of these parts and will send them to Circuithub.  We will not purchase these on your behalf as with other non-consigned parts.  If you did not intend to consign a part, get in touch ASAP so we can be sure to get all your parts on order.

Can I consign a full parts kit?

How many of each part should I consign?

  • The exact count needed for your build is indicated on the consignments view of your order page.  However, in most cases we do require extras to be included on top of this count.  Please see Supplying Extra Parts below.

What is the deadline for consigning parts?

  • The sooner the better, view the consignments tab on your order page for the latest deadline.

Can you hold onto my consigned parts for future orders?

How can I indicate that some or all of the parts I have marked as consigned are already in stock at Circuithub

Can I ship multiple orders parts in one shipment?

  • Yes this is no problem, simply add the tracking number to all orders and indicate clearly which parts belong to which order on your packing list.

How can I indicate that the consigned parts need special treatment?

  • If your parts need any sort of special treatment (ie. pre-baking, on cut-tape), you need to notify our team via the Issues tab on the order page.

Supplying Extra Parts (Dealing With Attrition)

Surface Mount

All surface mount material must be shipped either in continuous tape, trays, or tubes. We cannot accept multiple pieces of cut tape for the same part number. It would require us reloading that part into a feeder over and over and we do not quote our services based on having to do this kind of work. We expect to be able to load the part once and let the machine run. Loose material will only be accepted if we are notified first and there's a reasonable explanation for the material being loose (we're reasonable people).

Discrete Passives (cheap caps, resistors, inductors, etc.)

  • 01005 Package Size - 50% extra - 200 pieces minimum - at least 100 extra

  • 0201, 0402 Package Size - 50% extra - 100 pieces minimum - at least 50 extra

  • 0603, 0805 Package Size - 10% extra - 25 pieces minimum - at least 20 extra

  • 1206 and Larger Package Size: 5% extra - 10 pieces minimum - at least 5 extra

Inexpensive Active Devices (small diodes, LED's, regulators, transistors, crystals, etc.)

  • 0.6mm or smaller - 20% extra - 20 pieces minimum - at least 15 extra

  • 0.6mm - 1mm - 10% extra - 15 pieces minimum - at least 10 extra

  • 1.0mm - 2mm - 5% extra - 5 pieces minimum - at least 5 extra

  • 2mm or larger - 5% extra - 5 pieces minimum - at least 5 extra

Moderately Expensive Devices (regulators, drivers, crystals, inductors, connectors, etc.)

  • 0.6mm or smaller - 10% extra - 10 pieces minimum - at least 5 extra

  • 0.6mm - 1mm - 5% extra - 10 pieces minimum - at least 5 extra

  • 1.0mm - 2mm - 3% extra - 5 pieces minimum - at least 4 extra

  • 2mm or larger - 2% extra - 3 pieces minimum - at least 3 extra

Expensive Devices (MCU, memory, large inductors, sensors, wireless modules, etc.)

Most of these expensive parts should be handled on a case by case basis. Suffice it to say, we'd generally like at least 1 extra but understand that there may be times where exact count is necessary. We will still need extra if the components are very tiny though. The smaller the component, the more trouble we will have getting the pick and place machine to reliably do its job.

Price Breaks

Here's a quick tip. Look for price breaks when purchasing material. Although you may only need a small volume of components, it is often cheaper (especially for caps and resistors) to buy more than you need, saving both money and providing us parts to account for wastage.


  • Inexpensive Devices (resistors, caps, LED's, etc.) - 5% extra - 10 pieces minimum - at least 5 extra

  • Moderately Expensive Devices (connectors, regulators, etc.) - 2% extra - 5 piece minimum - at least 2 extra

  • Expensive Devices - exact counts are ok, but please notify us ahead of time


  • Inexpensive (less than $0.25) - 10% extra - at least 5 extra

  • Moderately Expensive ($0.26 - $1.00) - 2% extra - at least 2 extra

  • Expensive ($1.00 or more) - 1% extra - at least 1 extra

A Note About Insufficient Attrition

If we do not receive enough extra material, we will still build your assemblies to the best of our abilities but we will complete the assemblies short of whatever material we run out of. In other words, you will receive assemblies with missing parts. We will communicate all of this to you when this happens of course.

Material Identification

When you send us your materials, it is an absolute requirement that the materials and the shipment itself is clearly labeled with all of the necessary information. If it is not, then we will not know who the material belongs to and you may only hear from us once we're concerned that your material never arrived.

Identifying Individual Part Numbers

Each part number should be in its own separate package, be it a reel, a bag, a tray, or a tube. Each package of components should be clearly marked with the specific manufacturer's part number. This should match your BOM exactly. For the sake of our sanity, please do not write a partial part number on the package. Write the full and complete part number as we are expecting to identify it. If you have a cross (a part number that's equivalent to what we need but not the exact same manufacturer's part number) please communicate this to us ahead of time.

Distributors will often put a manufacturer's part number on their label. In this case, so long as that label is clear and legible, their label will work great. Here is an example from Digikey. These work really well.

Part number clearly identified


All material should come in a qualified package. We cannot accept parts that are loosely packaged. Many (nearly all) electronic component are extremely fragile and will get damaged in transit to our factory. Parts must come in one of 4 ways

  • Tape and Reel - cut tape is perfectly acceptable

  • Tube - the tubes should be sized appropriately for the part and all of the parts in the tube should be facing the same direction. Please do not put parts in the tube 180 degrees (opposite) from other parts

  • Trays - the tray should be designed specifically for the component. There should be a mating tray of the same type keeping the components stationary in the tray. We have seen some trays come in with a piece of cardboard taped to the top of the tray in an attempt to keep the component in the tray. This will not work. Every time we've seen this done, we've seen many if not all of the components get damaged.

  • Other package - if the components you have are expensive and you only have them loose with no means of repackaging them, then we'd recommend buying some type of purpose built ESD container that will make sure the components don't get damaged in transit. Something like this would probably work well. But please let us know ahead of time when you are sending components like this. We need to be prepared because our machines cannot pick from anything that is not cut tape, tubes, or trays. It will require we come up with a custom tray solution to pick these components from. We don't mind doing this for especially expensive components.

 Useful containers for very expensive loose components.

Packing List

A packing list must be included in your package. This list can be as simple as a handwritten sticky note if it's just a couple of parts. But if it's a larger number of unique parts, then please type up a packing list that includes at least the Part Number and Quantity provided. But the more information provided, the better. Descriptions can be nice because then we can verify that the part labeled matches the description. We've seen plenty of consigned kits where our customer labeled the part one thing (say a 10k resistor) but it was something else (like a 1k resistor). Having the description on the label helped us identify the wrong part before it got soldered to the board.

Here is an example of a packing list a customer sent us that just made our day.

Identifying The Package

When you put all of your material into a box to ship to us, the attention line of the address should read as follows. You can find this information in the Consignments tab of your Order Page.

re: username/order#
Worthington Assembly Inc.
14 Industrial Drive East
South Deerfield, MA 01373
United States

Notify Us

Once you have shipped the parts, be sure to enter the tracking number on the Consignments tab of your order page.

If you have already consigned the required parts at an earlier period and Circuithub is keeping these in stock for you, you can use the checkbox on the consignments view of your order page to notify us of this.

Return or Stock Material

By default we will send all surplus consigned parts back to you when shipping the order. Some customers prefer that we hold their consigned material in stock so that they can be used in a future project. There is a checkbox which you can tick for this purpose on the consignments view of your order page.

Note that we do not bake and reseal moisture sensitive parts if you elect to have surplus consigned parts sent back to you. If you elect to have us keep surplus moisture sensitive parts in stock they will be stored in dry conditions or baked before next use.

Shipping fees and import duties

For consigned parts, the sender pays shipping fees; we do not provide shipping labels. If parts are purchased by us from an international vendor the sender will also be responsible for all duties and taxes.

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