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LEGO part 3900: Equipment Signal Paddle

Minifig Accessories7 colours170 sets

LEGO part LEGO part 3900: Equipment Signal Paddle

Specifications

Reference3900
CategoryMinifig Accessories
MaterialABS plastic
Colours7
Sets170
Listed pieces278
First appearance1996
Latest appearance2026
Element (White)390001
Most common colourWhite
Main themesCity, Friends, Seasonal
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3900, Equipment Signal Paddle, belongs to the Minifig Accessories category. It exists in 7 colours and appears in 170 sets of our database, from 1996 to 2026, for a total of 278 listed pieces. Its most common colour is White.

Number 3900 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in white, it is 390001.

Part 3900 through the years

The oldest set in our database that contains part 3900 is 6598 Metro PD Station, released in 1996 in the Town theme. It is still in use: the most recent set featuring it, 75425 Mos Eisley Cantina, dates from 2026.

Its peak year is 2017, with 14 sets containing it. The set with the most copies is 7905 Building Crane: 8 copies, against an average of 1.6 per set.

It is spread across several themes, led by City (19%), Friends (11%) and Seasonal (6%). With 170 sets, it ranks no. 809 of 2,731 parts in our database and no. 28 of 147 in the Minifig Accessories category.

Sets containing part 3900, by period

PeriodSets
1996-199913
2000-200935
2010-201982
2020-202640

Colours of part 3900

3 colours appear in only one set: black (21064 Paris - City of Love), blue (5895 Villa Belville) and medium nougat (42694 Pizza Truck).

Colour (element ID)SetsPiecesExample sets
White390001104161603356032960141
Light Bluish Gray4211753609360215759788043
Light Gray416655021634203425
Yellow465681122102453315
Black6575081 · 42556671421064
Blue390023115895
Medium Nougat65947281142694

Where to buy part 3900

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 3900 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3900

Sets ranked by popularity that include at least one part 3900, in any colour.

More parts in the Minifig Accessories category

All parts in the Minifig Accessories category

Frequently asked questions

How many LEGO sets include part 3900?

Part 3900 (Equipment Signal Paddle) appears in 170 sets listed on Setopedia, from 1996 to 2026, in any colour.

Which LEGO set contains the most copies of part 3900?

Set 7905 Building Crane, released in 2006, contains 8 copies, the highest count in our database. On average, a set containing part 3900 has 1.6.

Which colours does LEGO part 3900 come in?

7 colours are listed for part 3900. The most common is White, found in 104 sets.

What is the rarest colour of part 3900?

According to our inventories, it is blue, found in only 1 set (5895 Villa Belville).

What is the element ID of part 3900 in white?

In white, part 3900 has element ID 390001. Number 3900 is the mould number, the same for every colour.

Is LEGO part 3900 still used in recent sets?

Yes: it appears in sets released in 2026, such as 75425 Mos Eisley Cantina.

Where can I buy LEGO part 3900 individually?

Single parts 3900 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.