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. close up image of 02302-9A30-17RU4B 2 stage cascade mini peltier cooler

    02302-9A30-17RU4B 2 Stage Mini Thermoelectric Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    1.7 0.9 2.3 97 3.9 10 3.2 0.15 0.39 0.13
  2. image of 04602-9B30-11RA two stage mini thermoelectric TEC

    04602-9B30-11RA 2 Stage Mini Thermoelectric Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    1.1 1.5 3.8 90 8 8 2.4 0.32 0.32 0.10
  3. image of 07603-9U30-10RU4A three stage mini thermoelectric TEC

    07603-9U30-10RU4A 3 Stage Mini Thermoelectric Module

    Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in)
    1 1.1 5.8 110 4 4 3.8 0.16 0.16 0.15
  4. image of powerful 2 stage cascade peltier cooling module part number 39812-5L31-10CQQ 40x40mm

    39812-5L31-10CQQ 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)
    10.2 98.5 24.4 93 40 40 6.3 1.57 1.57 0.25

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