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Thermo Scientific™ Jewett™ High-Performance Lab Freezers

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

Manufacturer: thermo scientific™  JLF430A

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Catalog No. JLF430A

 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
Capacity (English) 4.9 cu. ft.
Capacity 4.9 cu. ft., 133L
Shelves 3
Width (Metric) Exterior 61cm
Doors Single, Solid
Width (Metric) Interior 50.8cm
Shipping Weight (English) 220 lb.
Depth (English) Interior 20.5 in.
Height (English) Exterior 33.4 in.
Length (Metric) Exterior 66cm
Width (English) Exterior 24 in.
Temperature Range (Metric) -30°C
Refrigerant CFC-free
Amperage 8A
Capacity (Metric) 133L
Defrost Automatic
Height (Metric) Exterior 85cm
Width (English) Interior 20 in.
Height (Metric) Interior 50.8cm
Dimensions (D x W x H) Interior 20.5 x 20 x 20 in. (52.1 x 50.8 x 50.8cm)
Voltage 115V
Electrical Requirements 115V 60Hz
Temperature Control Microprocessor
Length (English) Exterior 26 in.
Hertz 60Hz
Dimensions (L x W x H) Exterior 26 x 24 x 33.4 in. (66 x 61 x 85cm)
Plug Type 5-15P
Shipping Weight (Metric) 100kg
Breaker 15A
Cabinet Type Undercounter cabinet
Certifications/Compliance UL, CE
Depth (Metric) Interior 52.1cm
Height (English) Interior 20 in.

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..