The SMCJ series surface-mount Transient Voltage Suppression Diode designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. It is ideal for the protection of I/O interfaces, VCC bus and other vulnerable circuits. It is used for surface mounted applications in order to optimize board space.

• 1500W Peak pulse power capability at 10/1000μs waveform
• Built-in strain relief
• Glass passivated junction
• Low inductance
• Excellent clamping capability
• 0.05% Repetition rate (duty cycle)
• <1ps from 0V to V(BR) Minimum fast response time
• <1μA above 10V Current IR
• Available in unidirectional and bidirectional
• ESD protection of data lines in accordance with IEC 61000-4-2 (IEC801-2)
• EFT protection of data lines in accordance with IEC 61000-4-4 (IEC801-4)
• -65 to 150°C Operating temperature range

HA Series transient surge suppressors are industrial high energy Metal-Oxide Varistors (MOVs). They are designed to provide secondary surge protection in the outdoor and service entrance environment (distribution panels) of buildings, and also in industrial applications for motor controls and power supplies used in the oil-drilling, mining, and transportation fields. The design of the HA Series of MOVs provide rigid terminals for screw mounting. Also available in a clipped lead version for through hole board placement or to accommodate soldered leads designation "HC."

• Lead–free, Halogen-Free and RoHS compliant.
• Wide operating voltage range VM(AC)RMS 110V to 750V
• Two disc sizes available 32mm and 40mm
• High energy absorption capability WTM = 170J to 1050J
• High peak pulse current capability, ITM = 25,000A to 40,000A
• Rigid terminals for secure mounting
• Available in trimmed version for through hole board mounting
• No derating up to 85ºC ambient

The SMCJ28CA from Littelfuse is a SMCJ series 1500W, surface mount bidirectional transient voltage suppression diode in DO-214AB package. It features excellent clamping capability, low incremental surge resistance, low profile package, moulded plastic body over glass passivated junction, built-in strain relief and fast response time of typically less than 1.0ps from 0Vs to BV minimum. The peak pulse power dissipation (PPPM) is 1500W at TA=25°C, 10/1000μs waveform, 0.01% repetition rate (duty cycle) and power dissipation is 6.5W on infinite heat sink at TL=50°C. This SMCJ series transient voltage suppression diode is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. It is ideal for the protection of I/O interfaces, VCC bus and other vulnerable circuits.

• Reverse stand off voltage (VR) of 28V and maximum reverse leakage (IR) of 1µA at VR
• Breakdown voltage (VBR) of 31.1V minimum, 34.4V maximum at 1mA test current (IT)
• Maximum clamping voltage (VC) of 45.4V at IPP and maximum peak pulse current (IPP) of 33.1A
• Typical failure mode is short from over specified voltage or current
• UL E230531 approved, plastic package is flammability rated V-0 per UL standard
• IEC-61000-4-2 ESD 30KV (air), 30KV (contact) protection
• Suitable for surface mounted applications to optimize board space
• Operating temperature range from -65°C to 150°C and 260°C/40sec high temperature to reflow soldering
• ESD protection of data lines with IEC 61000-4-2 and EFT protection with IEC 61000-4-4 standard