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.
-
$76.00 As low as: $55.10
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 -
$59.50 As low as: $43.20
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 35.9 15 90 40 40 6.35 1.57 1.57 0.25 -
$76.00 As low as: $55.10
1581T-9L31-05CQQ-S 2 Stage Thermal Cycling Thermoelectric Module [RTV sealed]
Imax (amps) Qmax (watts) Vmax (volts) dT Max (°C) A (mm) B (mm) H (mm) A (in) B (in) H (in) 5 19.18 15.9 100 40 40 9 1.57 1.57 0.35 -
$74.75 As low as: $54.20
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) 4.6 13.6 8.2 83 20 20 6.9 0.79 0.79 0.27 -
$76.50 As low as: $55.50
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) 4.3 7 3.8 90 15 15 6.9 0.59 0.59 0.27