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Maida Development Company


Founded in 1947 and based in Virginia, Maida Development Company manufacturers high quality electronic components for a wide range of industries. Maida’s product offering includes: varistors, thermally protected varistors (TMOVs), capacitors, thermistors, surge protective devices (SPD), electromagnetic interference (EMI) filters, and more. With a manufacturing warehouse located in China, IBS Electronics can ship Maida components anywhere in the world.

Wide Range of Applications

Maida components can be applied to a wide range of uses and industries. Their zinc oxide varistors are used in devices that require protection against high voltage transients induced on power lines by either lightning strikes, or suppression of transients caused by switching inductive loads from industrial equipment, transformers, relays and coils. Applications vary by industry, but common types include ground fault interrupters, telecommunication equipment, high voltage power supplies, motor control and cable TV systems, AC smoke detectors, computer-related products, and more.

Their standard selection of radial-leaded varistors is among Maida’s largest and most comprehensive. These varistors consist of wire leads with nominal disk diameters, from 3mm to 25mm. This series is designed for most low and medium power applications requiring thru-hole components. Maida’s thermally protected high energy (TMOV) series is intended for safe disconnection of the varistor from a circuit with abnormal operating conditions. The TMOVs can withstand rigors of UL1449 4th Edition Type 1 and Type 2 applications while meeting the requirements for typical high energy varistor applications.

Quality and Customization Options

With a long history of proven quality and performance, Maida products have been used for trips to the moon during the Apollo Space Program. This is partially due to continuous research and development for not only manufacturing processes, but customer applications as well.

Not sure if the standard Maida components are right for your application? Custom design and fabrication of ceramic components for specific customer requirements are also available through IBS Electronics. Our knowledgeable staff can work with your specifications for a custom solution that’s right for your project. Contact our team today.


Through Hole Varistor Products

  • Standard
  • Low Profile
  • HC Series
  • High Energy
  • Thermally Protected
Surface Mount Varistor Products
  • Encapsulated MOV
  • SMV Series
  • Multilayer (MLV)
Ceramic Disc Capacitors
NTC Thermistors
EMI Devices
Gas Discharge Tube
TVS Diode

Maida's Products

The Standard Series is our broadest and most comprehensive line of radial-leaded varistors. Consisting of wire leads with nominal disk diameters from 3mm to 25mm, they are available with maximum continuous operating voltages (MCOV) ranging from 11VAC to 1000VAC. The Standard Series is designed to handle most low and medium power applications requiring through-hole components. Products comply with UL Type 2 and Type 3 listings. The Standard Series is available in bulk and industry standard tape and reel configurations for automatic insertion.

The Low Profile series complements our Standard Series of varistors. These varistors are square in shape allowing them to fit into smaller spaces than the equivalent round varistors. They offer a lower seating height and smaller width on the PC board. Voltages series range from 130VAC to 1000VAC. Four sizes are available; 12mm, 17mm, 22mm, and 25mm. The Low Profile Series is available in bulk and industry standard tape and reel configurations for automatic insertion.

The HC Series of varistors were designed to withstand the rigors of higher pulse repetition requirements, and higher one pulse peak surge currents. The HC Series can handle higher peak currents than our standard series of varistors of the same diameter. Customers that need to meet UL943 requirements find these particularly useful. These are available in round disc sizes of 8, 10, 11, 12, 14, 16, 18,20mm, and 25mm diameters with voltages ranging from of 130VAC to 550VAC. Square discs are also available in sizes of 9, 10, 11, 12, 14, 17, 20, 22, and 25mm with voltages ranging from 130VAC to 550VAC. Products comply with UL Type 2 and Type 3 listings. The HC Series is available in bulk and limited tape and reel configurations for automatic insertion.

The High Energy Series large tab-leaded varistors are designed to handle high peak currents and have the ability to absorb large amounts of energy. These are available in both round and square shapes to allow mounting in various spaces and in dual configurations. Available in 32mm, 40mm, and 53mm single-disk configurations; 25mm and 34mm single-square configurations; 40mm dual-disk configuration; and 25mm and 34mm dual-square configurations. Voltages range from 130VAC to 1000VAC.

The Thermally Protected Series is designed for safe disconnection of the varistor from the circuit due to abnormal operating conditions. These components consist of 2 or 3 wire leads, a thermal disconnect, and have nominal diameters of 14mm, 20mm, and 25mm. Voltage ranges from 60VAC-750VAC with peak surge currents of 4.5kA/6kA (14mm), 10kA (20mm), and 18kA (25mm). The Thermally Protected Series is designed to handle similar through-hole applications as a standard varistor.

Surface Mount Varistor Products

The Encapsulated MOV Series is ideal for SMT processing and Pick and Place assembly. Its low profile package offers space savings compared to leaded devices. These encapsulated components can withstand higher surge energies (up to 1200A) than MLVs. They are available in standard EIA sizes of 2825 and 4032 packages. The construction is RoHS compliant and the coating is UL94-V0 rated. UL/cUL recognition is pending.
The SMV Series are monoblock ceramic chips terminated on each end. Designed for Surface Mount applications they available in voltages from 10 to 275 VAC. Dimensions are 0.320 in. x 0.200 in. with a 0.080 in. maximum thickness. SMV Varistors are available in bulk and industry standard carrier tape for automatic insertion.

Maida MLVs(Multilayer Varistors) are available in 5 different designs. The SV SERIES provides good high current pulse protection with moderate capacitance and low cost. The TV SERIESoffers lower capacitance than the SV series. Energy and maximum current protection is also reduced. The EV SERIES is our lowest capacitance MLV which is ideal for protecting high speed data lines from ESD on hand held devices. The PV SERIES is our Power MLV series. These offer higher current pulse protection and high reliability for applicatiions where higher capacitance is not important. The AV SERIES is a viristor array designed for protecting multiple I/O connections in a single package, saving PCB space and insertion costs.

Additional Products

Maida Development Company and X2Y Attenuators, LLC. have developed a new line of Power Line Filtering components. These new products are using over 60 years of Maida ceramic technology and are constructed in accordance with the patented X2Y Architecture. The new device family provides: Differential Mode Filtering performance from 150 KHz. Common Mode Filtering of 30db to 50db from 30.0 MHz thru 6.0 GHz.

The X2Y architecture facilitates the efficient use of capacitance (the device operates faster at lower frequencies) and inductance cancellation (at the higher frequencies), thereby performing as a true broadband filter device. The initial product offerings have working voltages up to 250VAC. Packaging options include chassis or wall mount and PC mount. These are UL 1283 recognized.

The Gas Discharge Tube (GDT) Series are designed to withstand the rigors of overvoltages and transient currents with excellent surge current to size ratio. GDTs exhibit very low capacitance values which are beneficial in numerous applications: including data and communication protection. The GDT Series are also used in AC power line applications as they exhibit no leakage current and have small to large surge capabilities. Standard and custom sizes are available with no wire lead, wire leads, and surface mount options. Standard and custom voltages are also available.

TVS Diodes:
The Transient Voltage Suppression (TVS)Diode is an overvoltage protection device typically used for protection against overvoltages caused by transients such as lightning, inductive switching, and ESD. TVS Diodes typically respond to transients faster than many surge protective components. Maida?s TVS Diodes are offered in various configurations with numerous operating voltages and surge current ratings.


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Product List:

Part Number Product Name Qty Price (US$)  
D5811Z0V500RA01T17 Maida D5811ZOV500RA01T17 Metal Oxide Varistor (MOV) 50V 2J 5MM RoHS 1,500 0.2500
D6921ZOV151RA09 Maida D6921ZOV151RA09 Varistor MOV 150V 14MM 45J LS7.5 0 0.1820
D6121ZOV181RA04 MAIDA D6121ZOV181RA04 Varistor D6121ZOV181 Series 230 V 3500 A 370 pF 0 0.1700
D65ZOV391RA150 Maida D65ZOV391RA150 Varistors 390 VAC 505 VDC 0 1.1000
D65ZOV321RA160 Maida D65ZOV321RA160 Varistors 0 0.5278
D69ZOV581RA120 Maida D69ZOV581RA120 Varistors 0 0.3200
D6521ZOV181RA20 Maida D6521ZOV181RA20 Varistors 0 0.4600
D6921ZOV131RA09 Maida D6921ZOV131RA09 Varistors 0 0.4600
D6944Z0V301RA80T1N MAIDA D6944ZOV301RA80T1N VARISTOR MOV 300VAC 6000A 386pF 30,000 0.2500
D69ZOV301RA80 MAIDA DEVELOPMENT D69ZOV301RA80 Varistor 300Vac 6kA 560 pF 0 0.7200
D6521ZOV151RA20 MAIDA DEVELOPMENT D6521ZOV151RA20 Varistor 200 VDC 12000 A 2000 pF 0 1.2500
8S17SM300T6 MAIDA DEVELOPMENT 8S17SM300 Varistor 38V 250A 800 pF 0 0.5000