Thermoelectric (Peltier) modules: TEC1-12706, 12710, 30 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/thermoelectric-tec1/  (CC BY 4.0)
Basis: Common TEC1 module sizes from manufacturer datasheets (Hebei I.T., Laird equivalents); thickness varies ±0.1 mm by maker
Catalog version: 2026-10-20

Sizes: see table below
- TEC1-12706: 40 × 40 × 3.8 mm (127 couples, 6 A, ~60 W heat pumping at ΔT 0); the standard hobby module. TEC1-12710: 40 × 40 × 3.3–3.4 mm, 10 A. 30 × 30 × 3.4 mm modules (TEC1-12704, 03104 class) for small loads. 50 × 50 and 62 × 62 exist for high current.
- Leads exit one edge (red +, black −); keep 5 mm clear there. Hot and cold faces are the ceramic plates: clamp between heat sinks with thermal paste, 4 × M3 at the heat-sink corners, never over-tighten (ceramic cracks).
- As a generator (Seebeck) a 12706 gives ~1–2 W at ΔT 100 K; the high-temperature TEG modules (TEG1-12611 etc.) share the 40 × 40 footprint but run to 300 °C.
- Why it's here: the LES thermoacoustic builds use a 12706 as a ΔT instrument and as a TEG on the cold spool to run the fan.

module  size_mm  thickness_mm  i_max_a  note
TEC1-12706  40 × 40  3.8  6  standard hobby module
TEC1-12710  40 × 40  3.4  10  thinner
TEC1-12704 / 03104  30 × 30  3.4  4  small
TEC1-12730  62 × 62  4.8  30  large

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Thermoelectric cooling — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Thermoelectric_cooling
- Hebei I.T. (Shanghai): TEC1-12706 datasheet — PDF — Manufacturer datasheet [verify license at link] — https://peltiermodules.com/peltier.datasheet/TEC1-12706.pdf
- Long Earth Society: Engine builds that use these parts (videos and write-ups) — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/thermoelectric-tec1/index.json
API: https://xemstudio.com/api/geometry?object=thermoelectric-tec1