Mallory is a technology-driven manufacturer of high-performance audible and visual warning devices. We manufacture and distribute the Sonalert® brand of electronic audible and visual alarms. Sonalert is recognized around the world as the standard in audible and visual warning alarms, and other devices such as microphones, speakers, transducers, indicators, and sirens.

With one of the most extensive product offerings available, Mallory Sonalert delivers sound solutions to customers in a variety of industrial, consumer, transportation, medical and military markets.


Mallory offers several different series of panel alarms for various industrial control, transportation, and medical applications. Mallory’s SC Series features screw terminals, but also offers models with flat blade terminals and wires. Mallory’s SCE Series features finger-proof safe termination, but can also be ordered with other termination options. Both of these series feature a 30mm mounting hole, many different voltage ranges (up to 250 Vac), various sound types & sound levels, CUL & UL approval, and are suitable for rugged inside or outside use. 

  • Fits in 30mm Panel Hole
  • Available in Screw Terminals, Flat Blade or Wires
  • Most Models cUL Approved
  • NEMA 4X w/P/N ACC03
  • dB Distance = 2 ft (60 cm)


Mallory’s Hazardous Location Panel Alarms (SCH Series) are UL and CUL approved for use in Class I, Division II, Groups A, B, C, & D applications. These compact panel alarms fit in a 30mm hole and are rated for inside or outside use with NEMA 3R, 4X, & 12 water-proof ratings. A wide variety of voltage ranges, sound levels, and sound types are available
  • Class I Div II Groups A, B, C, & D
  • cUL Approved
  • NEMA 4X
  • Fits in 30mm Panel Hole
  • dB Distance = 2 ft (60 cm

Silver Case Tantalum Capacitators

Mallory’s subminiature Silver Case Tantalum Capacitors (TS5 Series) delivers high CV product per case size, and are suitable for high powered equipment requiring a small capacitor package. These capacitors are suitable for consumer, industrial, and military applications where a hermetic seal is not required, but the application does have a high level of shock, vibration, and/or temperature.

  • High capacitance per case size
  • High capacitance-weight ratio
  • Low DC Leakage
  • Multiple case sizes to maximize volumetric efficiency

Medical Alarms

Mallory’s IEC 60601-1-8 Medical Alarm models have been approved at UL & CUL to meet the requirements of IEC 60601-1-8. These models have circuitry, only require DC voltage, and can produce the low, medium, and high priority tones needed to meet IEC 60601-1-8. Mallory’s smallest models are in the MSS Series which produce 90 dB @ 10cm in a compact 23 x 14mm housing with PC Pins. SBT Series utilizes a piezo transducer in a 45 x 14mm housing, and are ideal for low current applications. Mallory’s SBS Series utilizes a larger speaker in a 45 x 15mm housing which enables a sound level of 100 dB @ 10 cm and are appropriate for louder environments such as an operating room.

IEC60601-1-8 Medical Alarms

  • Circuitry Included
  • DC Voltage Required; 5 Vdc
  • 1 to 3 priority medical tones
  • UL approved to IEC 60601-1-8


Mallory Sonalert 30mm Stacklights are small enough to be mounted directly on top of the machine control box. Options include 12 Vdc or 24 Vac/dc voltages, direct mount or 4-inch pole mount, and with or without sound. While only 1 sound type is available per Stacklight, there are seven different sounds to choose from when ordering including a chime sound unique to Mallory. These compact 30mm Stacklights are ideal to use on robots, cobots, 3D printers, scientific & engineering equipment, and smaller industrial machines. Mallory’s 30mm Stacklights are the lowest cost and most versatile available on the market.
  • Up to 3 Light Modules (Red, Yellow, Green)
  • 4-inch Pole or Direct Mount
  • With or Without Sound (1 Sound per Alarm; 7 Different Sound Types)
  • 12 Vdc or 24 Vac/dc
  • cUL Approved; NEMA 12; IP-52


Available in up to 5 LED modules these Stacklights are available with a 12-inch pole or can be directly mounted on top of the machine. With an operating voltage rating of 24 Vac/dc or 120 Vac, the Stacklight can be ordered with or without a warning sound. The Stacklights with sound come with 4 different sound types that are user selectable. The sound frequency is a desirable 2,000 Hz which is 1,000 Hz lower than existing Stacklights. Mallory’s 60mm Stacklights are ideal for use on larger industrial machines in applications such as machine tooling, food processing, water treatment, assembly, packaging, and general industrial control applications.

60mm Stacklight Features

  • Up to 5 Light Modules (Red, Yellow, Green, Blue, & White)
  • 12-inch Pole or Direct Mount
  • With our Without Sound (4 Sounds per Alarm)
  • 24 Vac/dc or 120 Vac
  • cUL Approved; NEMA 12; IP-52