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Vishay General Semiconductor - Diodes Division SMBJ33CAHE3/52
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- Part No.:
- SMBJ33CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33CAHE3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
SMBJ33CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 33 V stand-off voltage (VWM), 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), making it suitable for protecting MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SMBJ33CAHE3/52 datasheet, SMBJ33CAHE3/52 pinout, SMBJ33CAHE3/52 application, or SMBJ33CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, UL 497B recognition, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable reverse leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling effective suppression of fast-rising transients such as ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The SMBJ33CAHE3/52 is rated for continuous operation from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C. Its thermal resistance from junction to lead (20 °C/W) supports reliable power dissipation under repetitive surge conditions when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1 mA - Confirmed minimum/maximum breakdown threshold ensuring consistent clamping onset across production lots. |
| VC (Clamping Voltage) | 53.3 V at 11.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capacity under standardized 10/1000 µs waveform with 0.01% duty cycle. |
| IPPM (Peak Pulse Current) | 11.3 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| TJmax | +150 °C - Maximum junction temperature rating enabling use in high-ambient industrial and automotive under-hood environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No functional distinction between leads; either terminal serves as cathode or anode depending on instantaneous voltage polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against high-energy transients like load dump and inductive kick without derating at room temperature. |
| AEC-Q101 qualified (HE3 suffix) | Confirms reliability for automotive applications including body control modules and sensor front-ends requiring extended temperature cycling and humidity exposure. |
| UL 497B recognized (QVGQ2) | Validates compliance for telecom and industrial signal line protection where regulatory agency listing is mandatory. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving clamping precision and reducing stress on downstream ICs. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines in variable-frequency drives exposed to inductive switching noise and ground bounce. IC Role / Device Role: Bidirectional voltage clamp placed across isolated signal inputs and low-side current sense paths. Use Value: Limits transient excursions to ≤53.3 V, preventing latch-up or overvoltage damage to isolated amplifiers and microcontrollers operating at 3.3 V or 5 V rails. |
Use Scenario: ESD and load-dump protection on LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role: Primary TVS element on differential sensor lines and unidirectional/bidirectional data buses. Use Value: Maintains signal integrity during ISO 10605 ESD events (±25 kV air, ±20 kV contact) while surviving 12 V system load-dump pulses per ISO 7637-2. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Surge suppression on 48 V DC power feeds to PoE-powered devices and remote radio units. IC Role / Device Role: Secondary-level clamping device downstream of primary MOV-based protectors. Use Value: Provides precise low-clamping-voltage backup protection with <1 µA leakage at 33 V, minimizing standby power loss in always-on equipment. |
Use Scenario: Overvoltage hardening of USB-C CC and VBUS lines against hot-plug transients and adapter faults. IC Role / Device Role: Bidirectional TVS placed directly at connector entry point before ESD diode arrays and load switches. Use Value: Clamps VBUS spikes to 53.3 V before they reach USB PD controllers, avoiding brownout or reset conditions during plug-in events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-M3/52 | Halogen-free, RoHS-compliant, commercial-grade version without AEC-Q101 qualification. | Lacks automotive stress validation; suitable for industrial and consumer applications where qualification is not mandated. | Select when cost-sensitive commercial designs require identical electrical specs but no automotive reliability testing. |
| SMCJ33CAHE3/52 | Same VWM/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM and higher IPPM (24.3 A). | Occupies more board space but handles higher surge energy; used where longer-duration transients dominate. | Choose when system-level surge testing exceeds 600 W or when layout allows larger footprint for enhanced margin. |
Compared with SMBJ33CA-M3/52, the SMBJ33CAHE3/52 adds AEC-Q101 qualification and UL recognition at identical clamping performance; versus SMCJ33CAHE3/52, it trades surge capacity for compact SMB footprint-critical for space-constrained automotive ECUs and portable electronics.
Availability
SMBJ33CAHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ33CAHE3/52 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 high-speed transient suppression in space-constrained, high-reliability applications-including automotive, industrial, and telecom-where precise clamping, low leakage, and AEC-Q101 compliance are essential.
FAQ
What does the "CA" suffix indicate in SMBJ33CAHE3/52?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ33CAHE3/52 provides symmetrical transient suppression in both polarities-ideal for AC-coupled signal lines, differential buses, or any application where voltage reversals occur. Unlike unidirectional variants (e.g., SMBJ33A), it has no cathode marking and exhibits matched breakdown characteristics in either direction.
Is SMBJ33CAHE3/52 suitable for automotive applications?
Yes, SMBJ33CAHE3/52 is AEC-Q101 qualified (confirmed by HE3 suffix) and tested for high-temperature operation up to +150 °C, making it appropriate for automotive use cases such as sensor protection, LIN bus hardening, and infotainment power rail clamping. Its UL 497B recognition further supports deployment in safety-critical subsystems.
How does SMBJ33CAHE3/52 compare to SMAJ33CA in terms of surge handling?
SMBJ33CAHE3/52 delivers 600 W peak pulse power (10/1000 µs), whereas SMAJ33CA is rated at 400 W. The SMB package offers superior thermal performance (RθJL = 20 °C/W vs. ~30 °C/W for SMA), enabling higher sustained surge current capability and better reliability under repetitive transient conditions than SMAJ33CA.
What is the maximum clamping voltage of SMBJ33CAHE3/52 under standard test conditions?
The maximum clamping voltage (VC) of SMBJ33CAHE3/52 is 53.3 V, measured at 11.3 A peak pulse current using the 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does SMBJ33CAHE3/52 require special PCB layout considerations?
Yes-optimal performance requires mounting SMBJ33CAHE3/52 on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve specified thermal resistance and surge current ratings. Narrow traces or insufficient copper area will increase junction temperature and reduce IPPM capability; refer to Vishay's recommended pad layout in document 88392 for exact dimensions.
SMBJ33CAHE3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ33CAHE3/52 FAQ
1.How can I place an order for SMBJ33CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33CAHE3/52 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 SMBJ33CAHE3/52 reliable?
The price and inventory of SMBJ33CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33CAHE3/52?
SMBJ33CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33CAHE3/52 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 SMBJ33CAHE3/52?
For technical support, including SMBJ33CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ33CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33CAHE3/52 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 SMBJ33CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33CAHE3/52?
All SMBJ33CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33CAHE3/52, 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 SMBJ33CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ33CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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