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Vishay General Semiconductor - Diodes Division SMBJ33AHE3_A/H
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- Part No.:
- SMBJ33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AHE3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,473
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Product details
Overview
SMBJ33AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 33 V stand-off 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 (IPPM), and 600 W peak pulse power (10/1000 μs waveform).
For engineers reviewing the SMBJ33AHE3_A/H datasheet, SMBJ33AHE3_A/H pinout, SMBJ33AHE3_A/H application, or SMBJ33AHE3_A/H equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, with cathode-banded polarity and glass-passivated junction for stable surge performance. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ max = 150 °C) support operation in compact PCB layouts with minimal copper area.
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform testing, with 0.01 % duty cycle rating and derating above 25 °C ambient per Fig. 2. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 36.7–40.6 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC (Clamping Voltage) | 53.3 V at IPPM = 11.3 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe voltage headroom for downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standard lightning/surge waveform; enables single-device protection for moderate-energy transients. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands repetitive inrush or fault currents without degradation; supports motor driver and relay coil suppression. |
| TJ max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; carries full surge current during clamping event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 33 V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics; supports long-term reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 33 V systems without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during transient events, preserving margin for 3.3 V or 5 V logic interfaces downstream of DC-DC converters. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements in high-volume SMT assembly. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics across temperature (-55 °C to +150 °C) and lifetime, critical for industrial field deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 33 V battery-fed ECUs from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp spikes above 33 V within nanoseconds. Use Value: Limits voltage to ≤53.3 V during 11.3 A surge, preventing damage to LDOs and microcontrollers rated for 40 V absolute maximum. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitters) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients before reaching precision op-amps or ADC drivers. Use Value: Sub-1 ns response and <1 μA leakage at 33 V ensure signal integrity remains uncompromised during normal operation and transient events. |
| DC-DC Converter Input Stage | Telecom Power Supply Surge Suppression |
Use Scenario: Input protection for 33 V input buck converters used in base station power modules. IC Role / Device Role / Timing Role: Primary clamping device absorbing coupled lightning-induced surges on primary-side bus. Use Value: 600 W rating handles repeated 10/1000 μs pulses without parameter shift, supporting compliance with GR-1089-CORE telecom surge standards. |
Use Scenario: Secondary-side protection on 33 V telecom distribution boards exposed to induced surges via long interconnects. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed across supply rail to prevent latch-up in PMICs and interface ICs. Use Value: 53.3 V clamping voltage maintains safe operating area for 36 V-rated power management ICs while minimizing board space vs. multi-stage solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHM3_A/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No difference in circuit behavior or layout; selected when halogen-free compliance is mandated by OEM or regional regulations. | Direct material substitution where RoHS + halogen-free requirements apply; no design change needed. |
| SMCJ33AHE3_A/H | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; higher thermal mass (RθJA = 50 °C/W) and 1500 W PPPM rating. | Used where higher surge repetition rate or longer pulse duration (e.g., 10/1000 μs at >0.01 % duty cycle) is expected. | Choose when system-level surge testing exceeds 600 W single-pulse limits or when board layout allows larger footprint for improved thermal margin. |
Compared with SMBJ33AHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ33AHE3_A/H provides 2.5× higher pulse power handling in a larger package-enabling extended surge endurance without altering clamping behavior.
Availability
SMBJ33AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom power supply designs requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ33AHE3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in automotive, industrial, and communications infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ33AHE3_A/H under standard test conditions?
The SMBJ33AHE3_A/H has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 11.3 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ33AHE3_A/H maintains this clamping performance across its specified operating temperature range.
Is SMBJ33AHE3_A/H qualified for automotive applications?
Yes, SMBJ33AHE3_A/H is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control, body electronics, and infotainment power supplies. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge endurance relevant to under-hood and cabin environments.
What does the "A" suffix in SMBJ33AHE3_A/H indicate?
The "A" in SMBJ33AHE3_A/H denotes a unidirectional configuration - meaning it functions as a single-polarity transient suppressor with cathode-banded polarity. This distinguishes it from bidirectional variants (e.g., SMBJ33CA), which suppress surges in both directions and lack polarity marking. The SMBJ33AHE3_A/H is intended for DC power line or signal line protection where reverse voltage is not expected.
How does SMBJ33AHE3_A/H compare to SMAJ33AHE3 in terms of surge capability?
SMBJ33AHE3_A/H delivers 600 W peak pulse power (10/1000 μs), whereas SMAJ33AHE3 is rated for 400 W in the smaller SMA (DO-214AC) package. The SMBJ33AHE3_A/H also offers lower clamping voltage (53.3 V vs. typically 58.1 V for SMAJ33AHE3 at same current) and higher IFSM (100 A vs. 40 A), making it more robust for demanding automotive and industrial surge environments.
What is the thermal resistance of SMBJ33AHE3_A/H, and how does it affect PCB layout?
The SMBJ33AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout; reducing copper area increases thermal resistance and may limit sustained surge repetition rate. For high-duty-cycle applications, designers should follow Vishay's recommended mounting pad dimensions in the datasheet to maintain SMBJ33AHE3_A/H reliability.
SMBJ33AHE3_A/H 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:
- 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_A/H FAQ
1.How can I place an order for SMBJ33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AHE3_A/H 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_A/H reliable?
The price and inventory of SMBJ33AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AHE3_A/H?
SMBJ33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AHE3_A/H 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_A/H?
For technical support, including SMBJ33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ33AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ33AHE3_A/H?
All SMBJ33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33AHE3_A/H Tags
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