ML Varistor Series

Category: Electronics, Littelfuse Inc, Resistors

The ML Varistor Series datasheet offers a detailed overview of the transient voltage surge suppression devices in the ML Series created by Littelfuse. These components utilize Multilayer fabrication technology to guard against a range of transient events, such as those outlined in IEC 61000-4-2, and are geared toward protecting integrated circuits and various other components at the circuit board level.

The ML Series devices are primarily intended for usage in power supply systems, control, and signal lines due to their wide operating voltage and energy capabilities. Fabricated from semiconducting ceramics, they come in a leadless, surface mount package, making them well-suited for modern reflow and wave soldering procedures. Unlike Zener diodes, the ML Series can operate over a broader temperature range and occupy a smaller footprint compared to plastic-housed counterparts. Littelfuse also manufactures other series such as the MLE for ESD applications, MHS for high-speed ESD, MLN for multiline protection, and AUML for automotive applications.

Specific applications of the ML Series include suppression of inductive switching, transient events like EFT and surge voltage at the circuit board level, and ESD protection in line with various industry specifications. These devices are also utilized to assist in achieving electromagnetic compliance for end products and can replace larger surface mount TVS Zeners in many applications.

Features

Compliance with AEC-Q200 and RoHS standards.
Availability in chip sizes 0402, 0603, 0805, 1206, and 1210.
Multilayer ceramic construction with an operational temperature range of -55°C to +125°C.
Voltage range from 5.5V to 120V DC.
Capabilities to handle surge current and energy with inherent bi-directional clamping.
Exemption from plastic or epoxy packaging to ensure a flammability rating better than UL94V-0.
Offering of standard low capacitance types.

Absolute Maximum Ratings

DC Voltage Range (VMDC): 3.5 to 120V.
AC Voltage Range (VMIAC/RMS): 2.5 to 107V.
Non-Repetitive Surge Current (8/20μs waveform): 4 to 500A.
Non-Repetitive Surge Energy (10/1000μs waveform): 0.02 to 2.5 Joules.
Operating Ambient Temperature Range: -55°C to +125°C.
Storage Temperature Range (TS): -55°C to +150°C.
Temperature Coefficient of Clamping Voltage: <0.01% / °C.

The datasheet clearly notes that specifications are subject to change and recommends consulting the Littelfuse website for the most current information. The revision date provided is July 11, 2010.