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Thermo Scientific™ Jewett™ High-Performance Lab Freezers

Store reagents, pharmaceuticals, biologicals and other commonly used laboratory materials.

Manufacturer: thermo scientific™  JLF1230A

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Catalog No. JLF1230A

 Please call Customer Service at 1-800-234-7437 or send an email to for assistance.

Description & Specifications


Warranty Warranty varies by country, please contact us for details
Type High-Performance Freezer
Shelves 4
Width (Metric) Interior 53.3cm
Width (English) Interior 21.75 in.
Voltage 115V
Length (Metric) Exterior 74.3cm
Plug Type 5-15P
Length (English) Exterior 29.3 in.
Height (English) Interior 52.4 in.
Height (English) Exterior 73.6 in.
Dimensions (D x W x H) Interior 20 x 21.75 x 52.4 in. (50.8 x 53.3 x 133.1cm)
Defrost Automatic
Cabinet Type Space Saver
Certifications/Compliance UL, CE
Width (Metric) Exterior 76.2cm
Height (Metric) Interior 133.1cm
Dimensions (L x W x H) Exterior 29.3 x 30 x 73.6 in. (74.3 x 76.2 x 186.9cm)
Depth (Metric) Interior 50.8cm
Height (Metric) Exterior 186.9cm
Depth (English) Interior 20 in.
Capacity (English) 11.5 cu. ft.
Capacity 11.5 cu. ft., 326L
Electrical Requirements 115V 60Hz
Doors Single, Solid
Temperature Range (Metric) -30°C
Breaker 15A
Temperature Control Microprocessor
Amperage 8A
Refrigerant CFC-free
Capacity (Metric) 326L
Shipping Weight (English) 280 lb.
Width (English) Exterior 30 in.
Hertz 60Hz
Shipping Weight (Metric) 127kg

Store reagents, pharmaceuticals, biologicals and other commonly used laboratory materials in Thermo Scientific™ Jewett™ High-Performance Lab Freezers. Designed for medical and scientific applications, these high-performance freezers feature microprocessor control, positive airflow systems, industrial-quality cabinet construction and extra-strength refrigeration compressors selected for industrial, clinical and scientific use.

Microprocessor Control

  • Microprocessor control system with audio and visual alarms
  • Bright digital temperature displays
  • Alarm silence, ringback and automatic reset functions
  • Setpoint security with key-operated, triple-position master switch that controls power to all systems
  • Audible/visual alarms for high/low temperature and power failure
  • Battery backup and remote alarm connections
  • Temperature is factory-preset at -30°C.†


  • Rugged, long-life cabinets with smooth, scratch-resistant interiors‡ and exteriors that are easy to clean
  • High-density, CFC-free insulation
  • Solid self-closing doors with 90° stay-open feature, keyed lock for added sample security
  • Closed-cell gasket provides a positive door seal to maintain a constant interior temperature
  • Directed airflow for fast temperature recovery after door openings
  • Smooth, ergonomic full-length door handle
  • Painted open-wire shelves are adjustable in 1″ (2.5cm) increments
  • 1″ (2.5cm) insulated access port standard
  • Set of four 2″ (5.2cm) casters included, two locking and two regular

Refrigeration System

  • Heavy-duty, industrial-grade, hermetically sealed compressors
  • Automatic defrost maintains optimum cooling

Ordering Information:

Options include freestanding low-voltage booster and built-in seven-day temperature chart recorder. Contact your Customer Service Representative for more information. V and W models not available in North America.


† Performance may be affected by ambient temperature and humidity conditions, sample loading preferences, and frequency of door openings.

‡ Specified interior volumes are nominal, and usable capacities may be offset by shelves, drawers, blower coils or cabinet protrusions..