SMBJ33A

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SMBJ33A

+BOM

TVS DIODE 38.7VWM 53.3VC DO214AA

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Specifications

Attribute Value
Package Tape & Reel (TR)
Series SMBJ
ProductStatus Active
Type Zener
UnidirectionalChannels 1
Voltage-ReverseStandoff(Typ) 38.7V
Voltage-Clamping(Max)@Ipp 53.3V
Power-PeakPulse 600W
Applications General Purpose
OperatingTemperature -55°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case DO-214AA, SMB

Overview

Features

The SMBJ33A is a 33V bidirectional TVS diode designed for transient voltage suppression in electronic circuits. Key features:
- Voltage Rating: 33V breakdown voltage (min), 36.7V clamping voltage at 1A.
- Bidirectional: Protects against both positive and negative voltage transients.
- High Surge Capacity: Handles 600W peak pulse power (8/20µs waveform).
- Low Leakage: Typically <1µA at standoff voltage.
- Fast Response: Reacts in <1ps to clamp transients.
- Package: Compact SMB (DO-214AA) surface-mount package.
- Applications: Protects sensitive electronics (e.g., power supplies, data lines, telecom) from ESD, lightning, and inductive spikes.
Ideal for automotive, industrial, and consumer electronics requiring robust surge protection.

Pinout

The SMBJ33A is a bidirectional TVS diode designed for transient voltage suppression.
- Pin Count: 2 (Anode and Cathode)
- Function: Protects circuits from voltage spikes by clamping transient voltages to a safe level (33V breakdown voltage). It operates bidirectionally, meaning it can handle both positive and negative voltage transients.
Commonly used in power lines, communication ports, and other sensitive electronics to safeguard against ESD, lightning, and other surges.
Key Specs:
- Breakdown Voltage (Vbr): 36.7V to 40.6V
- Peak Pulse Power: 600W (8/20μs waveform)
- Package: SMB (DO-214AA)
Concise and effective for surge protection.

Manufacturer

The SMBJ33A is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, a leading global company specializing in circuit protection, power control, and sensing technologies.
Littelfuse is a well-established American electronics manufacturer founded in 1927, known for its high-quality components used in automotive, industrial, and consumer electronics. The SMBJ33A is part of their TVS diode lineup, designed to protect sensitive circuits from voltage spikes and surges.
For verification, you can check Littelfuse’s official datasheet or distributor listings like Mouser, Digi-Key, or the Littelfuse website.

Application

The SMBJ33A is a transient voltage suppressor (TVS) diode designed to protect sensitive electronics from voltage spikes. Its key application areas include:
1. Power Supplies – Safeguarding against surges in AC/DC converters and regulators.
2. Communication Equipment – Protecting interfaces like Ethernet, RS-232, and telecom lines.
3. Automotive Electronics – Shielding CAN bus, sensors, and infotainment systems from transients.
4. Industrial Controls – Securing PLCs, motor drives, and I/O modules.
5. Consumer Electronics – Defending USB ports, HDMI, and other high-speed data lines.
With a 33V breakdown voltage, it’s ideal for low-voltage circuits requiring robust ESD and surge protection.

Package

The SMBJ33A is a transient voltage suppressor (TVS) diode in an SMB (Surface Mount) package. It's designed for surface mounting on PCBs, offering robust protection against voltage spikes. The package is compact, with a typical size of 4.6mm x 3.6mm x 2.8mm, and features two leads for easy soldering. It's commonly used in automotive, industrial, and telecom applications for surge protection.

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