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Vishay General Semiconductor - Diodes Division SMBJ33HE3/52
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- Part No.:
- SMBJ33HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33HE3/52.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,041
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Product details
Overview
SMBJ33HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V standoff voltage (VWM), 53.3 V maximum clamping voltage (VC) at 11.3 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial power supplies.
For engineers reviewing the SMBJ33HE3/52 datasheet, SMBJ33HE3/52 pinout, SMBJ33HE3/52 application, or SMBJ33HE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, SMB (DO-214AA) package compatibility with automated placement, low incremental surge resistance, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 36.7–40.6 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), enabling effective suppression of fast-rising transients from relay switching or motor commutation.
Thermally, it supports operation from –55 °C to +150 °C with a junction-to-ambient thermal resistance of 100 °C/W (on standard 0.2" × 0.2" copper pads) and handles 100 A non-repetitive forward surge (8.3 ms half-sine). The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage during 600 W transient; limits downstream stress on 3.3 V/5 V logic or 30 V MOSFET gate drivers. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 4 (4 kV) surge events. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of high-current DC bus nodes in motor drives. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Low-profile SMD outline (5.59 mm × 4.06 mm × 2.44 mm); compatible with IPC-7351B footprint and reflow profiles up to 260 °C. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; establishes reference for clamping action. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 24 V rail or signal trace); conducts surge current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - meets stress test requirements for temperature cycling, HTRB, and surge endurance. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (4 kV, 2 Ω source) without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage during transients - critical for protecting 30 V-rated MOSFETs or 3.3 V microcontroller I/O pins. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage current (<1.0 µA at 33 V) over lifetime and temperature - prevents false triggering in high-impedance sensor bias networks. |
Applications
| Industrial Motor Drive Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses inductive kickback from 24 V solenoid valves and brushed DC motors in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across coil terminals to clamp reverse EMF spikes within 1 ns. Use Value: Limits voltage to ≤53.3 V during 11.3 A transients, preventing gate oxide rupture in driving N-channel MOSFETs rated at 60 V. |
Use Scenario: Protects LIN bus transceivers and microcontroller GPIOs from load dump and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Standoff-clamp device on 12 V supply rail and LIN signal line, activated only above 33 V. Use Value: Maintains <1.0 µA leakage at 13.5 V nominal, avoiding battery drain while clamping 300 V/10 ms load dump to <55 V. |
| Telecom Power Input Stage | Consumer Appliance Sensor Interface |
|
Use Scenario: Shields AC/DC adapter secondary-side 24 V outputs from lightning-induced surges entering via Ethernet or PoE lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC output rail upstream of DC-DC converters. Use Value: Delivers 600 W pulse handling with <100 °C/W thermal resistance - sustains repeated surges without thermal runaway on standard PCB copper. |
Use Scenario: Guards analog outputs of temperature/humidity sensors in smart HVAC controllers against ESD from user touch panels. IC Role / Device Role / Timing Role: Low-capacitance (≈250 pF at 0 V) unidirectional suppressor on 3.3 V analog signal path. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <53.3 V in <1 ns, preserving ADC accuracy without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMB package. | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and no long-term automotive lifecycle commitment is needed. |
| SMCJ33AHE3/52 | Same AEC-Q101 qualification but SMC (DO-214AB) package - larger footprint (7.11 mm × 6.22 mm), higher PPPM (1500 W). | Used where higher surge margin is required (e.g., main DC input rails), but requires PCB layout change. | Choose when system-level surge testing exceeds 600 W or when thermal derating demands lower RθJA (50 °C/W typical). |
Compared with SMBJ33A-E3/52, SMBJ33HE3/52 adds AEC-Q101 validation for automotive use without altering electrical specs; versus SMCJ33AHE3/52, it trades surge capacity and thermal performance for space-constrained layouts requiring SMB footprint compatibility.
Availability
SMBJ33HE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power inputs, and consumer appliance sensor interfaces requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ33HE3/52 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets board-level transient suppression in automotive, industrial, and telecom systems - engineered for fast clamping, low leakage, and robust surge endurance in compact SMD packages.
FAQ
What is the breakdown voltage range for SMBJ33HE3/52?
The SMBJ33HE3/52 has a specified breakdown voltage (VBR) range of 36.7 V to 40.6 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable turn-on above the 33 V standoff voltage while accommodating process variation - critical for consistent clamping behavior across production lots of SMBJ33HE3/52.
Is SMBJ33HE3/52 suitable for bidirectional transient protection?
No - SMBJ33HE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ33CA variant. Using SMBJ33HE3/52 in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does SMBJ33HE3/52 meet automotive qualification standards?
Yes - the "HE3" suffix explicitly denotes RoHS-compliant construction and full AEC-Q101 qualification. This includes passing stress tests for temperature cycling, highly accelerated life testing (HALT), and surge endurance under automotive environmental conditions - making SMBJ33HE3/52 appropriate for under-hood and chassis-mounted applications where SMBJ33HE3/52 is deployed.
What is the maximum clamping voltage of SMBJ33HE3/52 during a surge event?
The SMBJ33HE3/52 clamps to a maximum of 53.3 V when subjected to its rated peak pulse current of 11.3 A (10/1000 µs waveform). This value is guaranteed per datasheet Table 1 and defines the upper voltage limit imposed on protected circuitry - essential for verifying compatibility with downstream components' absolute maximum ratings in designs using SMBJ33HE3/52.
Can SMBJ33HE3/52 be used in high-humidity or outdoor environments?
Yes - the SMBJ33HE3/52 uses a molding compound rated UL 94 V-0 for flammability and features matte tin-plated leads qualified to J-STD-002 for solderability. Its glass-passivated junction and hermetic SMB package provide inherent resistance to moisture ingress and corrosion, supporting reliable operation in humid industrial enclosures or outdoor telecom cabinets where SMBJ33HE3/52 is commonly applied.
SMBJ33HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- 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)
SMBJ33HE3/52 FAQ
1.How can I place an order for SMBJ33HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33HE3/52 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 SMBJ33HE3/52 reliable?
The price and inventory of SMBJ33HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33HE3/52?
SMBJ33HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33HE3/52 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 SMBJ33HE3/52?
For technical support, including SMBJ33HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33HE3/52 requirements.
6.How does Aetrix verify that SMBJ33HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33HE3/52 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 SMBJ33HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33HE3/52?
All SMBJ33HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33HE3/52, 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 SMBJ33HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ33HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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