Daily dependability.

Product Selection

Model Replacement Series Temperature Range Plug Type Capacity (2-inch boxes) Electrical
TSD40240A TDE40040FA TSD -10° to -40°C NEMA 5-20 13 cu. ft., 368L (240) 115V 60Hz
TSD40240D TDE40040FD TSD -10° to -40°C NEMA 6-15 13 cu. ft., 368L (240) 208-230V 60Hz
TSD40320A TDE50040FA TSD -10° to -40°C NEMA 5-20 17.3 cu. ft., 490L (320) 115V 60Hz
TSD40320D TDE50040FD TSD -10° to -40°C NEMA 6-15 17.3 cu. ft., 490L (320) 208-230V 60Hz
TSD40400A TDE60040FA TSD -10° to -40°C NEMA 5-20 23 cu. ft., 651L (400) 115V 60Hz
TSD40400D TDE60040FD TSD -10° to -40°C NEMA 6-15 23 cu. ft., 651L (400) 208-230V 60Hz



  • Microprocessor Controls: Centralized, knee level information center, including microprocessor control and monitoring system ensures all controls and displays are easy to reach and read.
  • State-of-the-art, refrigeration system: Improves temperature control and increases reserve BTUH capacity, resulting in a more stable temperature sample.
  • 1" (25mm) access ports: Allow for the use of inexpedient probes or instrumentation.
  • Secure inner doors: Four inner doors reduce cold air loss and improve temperature recovery after door closings.
  • Power Management System: Low voltage surge protection and buck/boost.
  • Easy to remove, washable filter: Provides protection from dust on the condenser, causing reduced refrigeration performance and increased risk to samples.
  • Simplified installation: New, easy-roll 2 inch locking casters.
  • Single-hand operation: Easy-to-use, padlock-compatible, ergonomic door handle with integrated key lock.

Rugged Construction:

  • Heavy gauge, cold-rolled steel cabinets: Powder-coat paint finish for a uniform exterior that resists chipping and rust.
  • Glaveneel interior.
  • 5" (127mm) foamed-in-place, polyurethane insulation: Reduces power consumption, maintains temperature setpoint and combined with triple-point door gasket, provides longer holding time in the event of a door opening.

Optional Features:

  • CO2 or LN2 back-up: Choice of CO2 or LN2 safety back-up systems for additional sample protection in the event of a power or mechanical failure.
  • Chart Recorder: Built-in chart recorder can be installed at knee level on TSD -40°C models.


  • Valid in the USA only.


Thermo Scientific TSD Series -40°C Upright Ultra-Low Temperature Freezers Product Brochure