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Vishay General Semiconductor - Diodes Division SMBJ33AHE3/52
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- Part No.:
- SMBJ33AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AHE3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,022
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Product details
Overview
SMBJ33AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 33 V standoff voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.3 V maximum clamping voltage (VC) at 11.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ33AHE3/52 datasheet, SMBJ33AHE3/52 pinout, SMBJ33AHE3/52 application, or SMBJ33AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 33 V), then avalanches within <1 ns when transient voltage exceeds VBR, clamping the line to ≤53.3 V while diverting up to 11.3 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and long-term reliability under repetitive surge stress.
The SMBJ33AHE3/52 is rated for 5.0 W steady-state power dissipation at 50 °C on infinite heatsink, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak, and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 53.3 V at 11.3 A (10/1000 µs) - Maximum voltage seen by protected circuit during worst-case surge; determines downstream component voltage rating requirements. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for transient suppression; validated per ANSI/IEEE C62.35 standard. |
| IPPM (Peak Pulse Current) | 11.3 A - Peak surge current the device safely clamps without degradation; derived directly from VC and PPPM. |
| TJmax | 150 °C - Maximum allowable junction temperature; enables operation in high-ambient industrial environments with proper PCB thermal design. |
| Leakage (ID) | 1.0 µA max at 33 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for RoHS-compliant soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to ground or lower-potential rail in unidirectional configuration; defines current path during clamping. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 33 V supply rail); avalanche initiates here when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance - suitable for under-hood and ADAS power rail protection. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from inductive switching (e.g., solenoid drivers, motor controllers) without failure or parameter shift. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage over lifetime; resists moisture ingress and metallurgical degradation during thermal cycling. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn cracking or delamination; eliminates pre-baking requirements. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V/5 V logic rails where margin above VCC is tight. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O against back-EMF spikes from brushed DC motors and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between motor supply rail and ground, triggered within nanoseconds of voltage overshoot. Use Value: Limits transient voltage to ≤53.3 V, preventing latch-up or oxide breakdown in 33 V-rated power management ICs and microcontrollers. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs (e.g., door lock actuators, ambient light sensors) from load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply line upstream of LDOs and interface ICs; activated only during >36.7 V events. Use Value: Maintains system uptime by absorbing 600 W surges without failure, meeting ISO 7637-2 Pulse 1/2/5a immunity requirements. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection on 48 V PoE-powered equipment (e.g., IP cameras, access points) exposed to lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with secondary MOV or GDT for multi-stage protection. Use Value: Clamps to 53.3 V within <1 ns, preserving 60 V-rated DC-DC converters and enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV). |
Use Scenario: Overvoltage safeguard for microcontroller reset lines and communication buses (UART, I²C) in washing machines and HVAC controllers subjected to ESD and relay noise. IC Role / Device Role / Timing Role: Low-leakage (1 µA) unidirectional suppressor on 3.3 V or 5 V rails, minimizing impact on pull-up networks. Use Value: Prevents false resets and data corruption by suppressing 300 V/150 ns ESD events per IEC 61000-4-2 Level 4 without loading the rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AE3/52 | Commercial-grade (non-AEC-Q101), same electrical specs and SMB package. | Lacks automotive qualification; not suitable for automotive OEM or Tier 1 production. | Select when cost sensitivity outweighs automotive reliability requirements and AEC-Q101 documentation is unnecessary. |
| SMAJ33AHE3/A | Same VWM/VC but lower PPPM (400 W), SMA (DO-214AC) package, 30% smaller footprint. | Reduced surge handling; requires tighter layout control due to higher power density and thermal resistance. | Choose for space-constrained consumer designs where 400 W surge margin is sufficient and automotive qualification is not required. |
Compared with SMBJ33AE3/52, the SMBJ33AHE3/52 adds AEC-Q101 validation for automotive use without changing clamping performance; versus SMAJ33AHE3/A, it delivers 50% higher surge energy capacity in a slightly larger but thermally superior SMB package.
Availability
SMBJ33AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMBJ33AHE3/52 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMBJ33AHE3/52 at its rated peak pulse current?
The SMBJ33AHE3/52 has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ33AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ33AHE3/52 suitable for automotive applications?
Yes, SMBJ33AHE3/52 is AEC-Q101 qualified, making it suitable for automotive applications including body control modules, infotainment power rails, and sensor interfaces. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. Its 150 °C junction rating, MSL Level 1 reflow compatibility, and validated surge endurance meet OEM requirements for under-hood and chassis-mounted electronics.
How does the SMBJ33AHE3/52 differ from the commercial-grade SMBJ33AE3/52?
The SMBJ33AHE3/52 differs from SMBJ33AE3/52 solely in qualification status: both share identical electrical parameters (VWM = 33 V, VC = 53.3 V, PPPM = 600 W), package (SMB/DO-214AA), and construction. The "HE3" suffix confirms AEC-Q101 qualification, including extended temperature cycling, humidity bias, and surge life testing - required for automotive production. The SMBJ33AHE3/52 is the appropriate choice when automotive compliance documentation and traceability are mandatory.
What is the maximum reverse leakage current for SMBJ33AHE3/52 at its standoff voltage?
The SMBJ33AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 33 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal power loss in always-on circuits and avoids unintended loading of high-impedance sensor or reference lines. Leakage remains below 5 µA up to 125 °C per Vishay's derating curves.
Can SMBJ33AHE3/52 be used in bidirectional configurations?
No, SMBJ33AHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ33CA). Using SMBJ33AHE3/52 in reverse-biased AC applications would result in forward conduction and potential failure. Always match the device polarity to the protection topology - SMBJ33AHE3/52 is intended for DC rail clamping with defined anode/cathode orientation.
SMBJ33AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ33AHE3/52 FAQ
1.How can I place an order for SMBJ33AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AHE3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ33AHE3/52 reliable?
The price and inventory of SMBJ33AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AHE3/52?
SMBJ33AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AHE3/52 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ33AHE3/52?
For technical support, including SMBJ33AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AHE3/52 requirements.
6.How does Aetrix verify that SMBJ33AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33AHE3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ33AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33AHE3/52?
All SMBJ33AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AHE3/52, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ33AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ33AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33AHE3/52 Tags
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