9V (later marketed as the Electric System or the 9V-powersystem, depending on country) was a voltage standard for electrical components (e.g. motors, lights) in many LEGO sets. It first appeared in 1985 in the Light & Sound series of Town and Space models that featured flashing lights and sirens, and was later expanded to the Monorail sets.
TECHNIC also moved over to the 9V system in 1990, with Trains making the change the following year.
The power came from a battery box with one 9V PP3 type battery (e.g. or later with 6x 1.5V batteries (TECHNIC, Basic). The 9V system sought to address the major weakness with the preceding 4.5V and 12V systems which was the pinned plug connectors that were prone to coming loose or the wires that would eventually fracture and fail after heavy use. The new system used special bricks that contained conductive elements built into the studs which were connected more positively and were more reliable over long periods of use. Wired connections were still used whenever power had to be transmitted through awkward routes, but the terminations used the conductive brick connectors in place of the pinned plugs.
The Trains theme was the only application of 9V that was powered by a mains DC Transformer and special metal conducting rails for 9V Trains (without any add-on centre conductor rails that were used by the earlier 12V Trains system). Controversially however the 9V Trains system lost most of the accessories of the 12V system such as remote controlled signals, points and lights.
9V powered Themes[]
- Basic
- Town / City / World City
- Space > Classic Space / Futuron / Unitron
- Trains
- TECHNIC
9V powered Sets[]
Basic
- 624 Basic Motor, 9V (1996)
- 735 Basic Building Set (1990)
- 845 Battery Motor, 9V (1992)
- 846 Lighting Set, 9V (1992)
- 4223 Basic Building Set (1999)
Town
- 6399 Airport Shuttle (1990) - Monorail
- 6430 Night Patroller (1991) - with Light & Sound
- 6440 Jetport Fire Squad (1991) - with Light & Sound
- 6450 Mobile Police Truck (1985) - with Light & Sound
- 6480 Hook and Ladder Truck (1985) - with Light & Sound
- 6481 Construction Crew (1989) - with Lights
- 6482 Rescue Helicopter (1989) - with Light & Sound
- 6483 Coastal Patrol (1994) - with Light & Sound
- 6484 F1 Hauler (1995) - with Light
Space
- 6750 Sonic Robot (1986) - with Light & Sound
- 6770 Lunar Transporter Patroller (1988) - with Light & Sound
- 6780 XT Starship (1986) - with Light & Sound
- 6781 SP-Striker (1989) - with Lights
- 6783 Sonar Transmitting Cruiser (1988) - with Light & Sound
- 6990 Monorail Transport System (1987) - Monorail with Light
- 6991 Monorail Transport Base (1994) - Monorail with Light & Sound
Trains
- 4551 Crocodile Locomotive (1991) - Crocodile Engine
- 4558 Metroliner (1991)
- 4563 Load and Haul Railroad (1991)
- 4564 Freight Rail Runner (1994)
- 4559 Cargo Railway (1996) - Highspeed Train Starter Kit
- 4565 Freight and Crane Railway (1996)
- 3225 Classic Train (1998)
- 4560 Railway Express (1999) - same set as 4561, but without transformer and speed regulator
- 4561 Railway Express (1999) - same set as 4560, but with transformer and speed regulator
- 10001 Metroliner (2001) - re-release of set 4558
- 4534 LEGO Express (2002) - Limited release
- 4535 LEGO Express Deluxe (2002) - Limited release
- 10020 Santa Fe Super Chief (2002)
- 10022 Santa Fe Cars - Set II (2002)
- 10025 Santa Fe Cars - Set I (2002)
- K10022 Santa Fe Train Kit (2002)
- 4511 High Speed Train (2003)
- 4512 Cargo Train (2003)
- 10132 Motorized Hogwarts Express (2004) - Hogwarts Express SE
- 10133 Burlington Northern Santa Fe (BNSF) Locomotive (2004)
- 10157 High Speed Train Locomotive (2004) - expansion to set 4511
- 65537 Classic Freight Train (2004)
- 65801 Trains Value Pack (2005) - Product Collection
- K10173 Complete Holiday Train Collection (2006) - Product Collection
- 10183 Hobby Trains (2007) - Factory Hobby Trains Set
- 4515 Straight Rails (1991) - Straight Tracks
- 4520 Curved Rails (1991) - Curved Tracks
- 4531 Manual Points with Track (1991) - Switching Rails
- 4519 Rail Crossing (1999) - Cross Track
- 2159 9V Train Track Starter Collection (2006)
- 4206 9V Train Switching Track Collection (2006)
- 10153 Train Motor 9 V (2002)
- 4548 Transformer and Speed Regulator (1991) - Electric Train Speed Regulator
- K2159 Holiday Train Starter Collection (2006) - Starter collection for set 10173
- K4548 9-V Train Accessory Collection (2007)
- 3748 Light Unit for Train (2001)
TECHNIC
- 8720 9V Motor Set (1990)
- 8082 Multi Model Control Set (1993)
Service Packs
- 5033 Light and Sound 1 x 4 Lighting Brick and 4 Colour Globes (1987)
- 5034 Light and Sound 1 x 2 Lighting Brick and 4 Colour Globes (1987)
- 5307 Headlight Bricks (1992)
- 5308 Headlight Bricks (1994)
- 5310 Light Brick Conductor (9 V) (1996)
Complete List[]
