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.
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$102.20 As low as: $74.1002302-9A30-17RU4B 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 -
$76.50 As low as: $55.5004812-5L31-04CFG 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) 4.3 7 3.8 90 15 15 6.9 0.59 0.59 0.27 -
$215.90 As low as: $156.5024614-5L30-34CQF 4 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) 3.4 9.1 14.5 115 15 15 13.7 0.59 0.59 0.54 -
$295.00 As low as: $213.8025415-5L30-65CQB 5 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) 6.5 9.75 13.8 128 10 10 12.5 0.59 0.59 0.49 -
$297.50 As low as: $215.6028414-5R30-47CGE 4 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) 4.7 6.5 14.6 125 8.5 13 7.8 0.34 0.51 0.31
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