Custom Thermoelectric - Peltier

Multistage TECs

Multistage TECs

Multistage (cascade) TECs can produce a larger Delta T than a single stage Standard TEC.  Each additional stage adds greater capability in temperature difference (Delta T) but each successive stage adds less capability than the one before it. This leads to a limit of around 8 to 9 stages, but for most puposes 5 stages is the practical limit due to costs versus useful delta T increase.

The most common multi-stage peltier modules are 2 and 3 stage.  A typical 2 stage TEC delta T capability can range between 80°C to 95°C.  A 3 stage can reach 95°C to 110°C, a 4 stage can reach 110°C to 120°C, and a 5 stage can achieve around 120°C to 128°C.  These limits do depend on temperatures, the specific multi stage TEC, the heat sink, and ambient conditions.  Multi-stage thermoelectric modules often have much lower Qcmax capability compared to similarly sized single stage TECs.  This is because increasing Delta T capability with multi-stage TE coolers decreases Qc capability.  Each stage must move all the heat rejected from the stage above it and additionally lower temperature itself.  

 image of 2 stage TEC

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  1. photograph of 2 stage cascade peltier cooling module part number 04812-5L31-04CFG

    04812-5L31-04CFG 2 Stage Thermoelectric/Peltier Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    4 6 3.8 83 15 15 7.4 0.59 0.59 0.29
  2. picture of 2 stage cascade TEC 10212-5L31-04CGL multistage cooler

    10212-5L31-04CGL 2 Stage Thermoelectric/Peltier Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    4 13.5 8.3 83 20 20 6.9 0.79 0.79 0.29
  3. image of 2 stage cascade peltier cooling module part number 19012-5L31-06CQQ 40x40mm

    19012-5L31-06CQQ 2 Stage Thermoelectric/Peltier Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    6 34.5 15.5 83 40 40 6.2 1.57 1.57 0.24
  4. photograph of 2 stage cascade peltier cooling module part number 25412-5L31-07CQQ 40x40mm

    25412-5L31-07CQQ 2 Stage Thermoelectric/Peltier Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    7 48 15.2 90 40 40 6.6 1.57 1.57 0.26

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