TEC1-12706 Thermoelectric Peltier Cooler

High-efficiency refrigeration chip semiconductor cooler 12V water dispenser air conditioner cold electronic DIY cooling module. 

TEC1-12706

• Size: 40 × 40 × 3.75 mm
• Internal resistance: 2.1–2.4 Ω (tested at 23 ± 1 °C, 1 kHz AC)
• Max temperature difference (ΔTmax at Qc=0): ≥ 67 °C
• Operating current (Imax): 4–4.6 A (at rated 12 V)
• Rated voltage: 12 V (Vmax 15 V, starting current 5.8 A)
• Cooling power (Qcmax): 50–60 W
• Operating environment: –55 °C to +83 °C (higher ambient temp directly reduces cooling efficiency)
• Sealing: Standard 704 silicone glue sealing around all sides

Key Differences between 12706 and 12703. 

• Power:
  • 12706 → 50–60 W, much stronger cooling
  • 12703 → 18 W, lighter duty
• Current draw:
  • 12706 → 4–4.6 A (more demanding)
  • 12703 → 3 A (lower power consumption)
• Internal resistance:
  • 12706 → ~2.1–2.4 Ω (lower resistance → higher current)
  • 12703 → ~4.0–4.3 Ω (higher resistance → less current)
• Max ΔT:
  • 12706 → ≥ 67 °C
  • 12703 → ≥ 60 °C
• Size:
  • 12706 → 3.75 mm thick
  • 12703 → 4.2 mm thick

Summary:

• Use TEC1-12706 if you need stronger cooling capacity (50–60 W) but can supply higher current (~5 A).
• Use **TEC