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Vishay General Semiconductor - Diodes Division SMBJ33CAHE3/5B
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- Part No.:
- SMBJ33CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33CAHE3/5B.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,321
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Product details
Overview
SMBJ33CAHE3/5B 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 and 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, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ33CAHE3/5B datasheet, SMBJ33CAHE3/5B pinout, SMBJ33CAHE3/5B application, or SMBJ33CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant construction with matte tin leads, 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 polarities due to its bidirectional structure. Its 33 V stand-off voltage ensures stable operation under normal conditions while allowing fast response (<1 ns) to transient overvoltages exceeding VBR (min 36.7 V, max 40.6 V at 1 mA).
The SMBJ33CAHE3/5B delivers 600 W peak pulse power handling per 10/1000 µs waveform with low incremental surge resistance and meets MSL Level 1 per J-STD-020 (260 °C reflow peak). Its junction temperature range spans −55 °C to +150 °C, and thermal resistance is rated at 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 53.3 V at 11.3 A - Clamped voltage during 600 W transient event, limiting downstream stress |
| PPPM | 600 W - Peak pulse power rating with 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| IPPM | 11.3 A - Peak surge current supported under standardized transient waveform |
| TJ max. | +150 °C - Maximum junction temperature enabling reliable operation in high-ambient environments |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity not marked on bidirectional devices per specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetric with cathode in bidirectional mode | Enables clamping conduction regardless of transient polarity-no orientation dependency on PCB |
| Cathode | Current exit terminal in forward bias; symmetric with anode in bidirectional mode | Provides identical clamping path for positive or negative transients-no marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 600 W peak pulse power | Handles high-energy transients from inductive switching or lightning surges in industrial systems |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without moisture-induced damage during assembly |
| Glass passivated junction | Ensures stable leakage performance (<1.0 µA at VWM) and long-term stability under thermal stress |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback signal lines against commutation spikes in 24 V DC motor control modules. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET gate-source or op-amp inputs to limit transient excursions. Use Value: Prevents latch-up or oxide damage by clamping spikes to ≤53.3 V while maintaining 33 V system operating margin. |
Use Scenario: ESD and load-dump suppression on LIN bus or analog sensor outputs in engine control units. IC Role / Device Role / Timing Role: Bidirectional transient suppressor connected between signal line and ground, independent of signal polarity. Use Value: Meets ISO 10605 (30 kV air, 15 kV contact) and ISO 7637-2 Pulse 1/2a/3a requirements without additional circuitry. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Overvoltage protection on −48 V DC telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device shunting surge energy to chassis ground before reaching DC/DC converters. Use Value: Withstands 600 W pulses and maintains <1.0 µA leakage at −48 V nominal, ensuring minimal standby loss. |
Use Scenario: Bidirectional transient suppression on USB-C CC and SBU lines susceptible to hot-plug ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector to minimize stub length and preserve signal integrity. Use Value: Clamps ±15 kV ESD (IEC 61000-4-2) within nanoseconds while adding <10 pF capacitance at zero bias. |
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-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free compliance is mandated in final product certification | Choose SMBJ33CA-M3/5B if BOM requires halogen-free materials per IPC-1752 or customer sustainability policy |
| SAC33CA | Same VWM/VC ratings but in smaller SOD-123FL package; lower PPPM (400 W), no AEC-Q101 qualification | Limited to consumer or non-automotive applications where space is constrained and surge energy is lower | Use SAC33CA only in space-constrained designs accepting reduced surge margin and non-automotive qualification |
Compared with SMBJ33CAHE3/5B, the SMBJ33CA-M3/5B offers identical protection performance with halogen-free packaging, whereas SAC33CA trades 33 % lower peak power and missing AEC-Q101 validation for 40 % smaller board area-making SMBJ33CAHE3/5B optimal for automotive and industrial reliability-critical deployments.
Availability
SMBJ33CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feed applications requiring stable component supply, AEC-Q101 traceability, and consistent 600 W surge handling.
Supply support for SMBJ33CAHE3/5B 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 high-energy transient suppression in harsh environments, engineered for robust clamping performance, automated manufacturability, and compliance with automotive and industrial safety standards.
FAQ
What is the clamping voltage of SMBJ33CAHE3/5B under a 600 W transient?
The SMBJ33CAHE3/5B clamps to a maximum of 53.3 V when subjected to its rated 600 W peak pulse power (10/1000 µs waveform) at 11.3 A peak current. This value is measured and guaranteed per Vishay's datasheet Table 1 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ33CAHE3/5B suitable for automotive applications?
Yes, SMBJ33CAHE3/5B is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control, body electronics, and ADAS sensor interfaces. The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction, validated for temperature cycling, HTRB, and ESD robustness.
Does SMBJ33CAHE3/5B have polarity markings on the package?
No, SMBJ33CAHE3/5B does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants, bidirectional types such as SMBJ33CAHE3/5B have symmetrical conduction in both directions and require no orientation during PCB placement.
What is the maximum reverse leakage current of SMBJ33CAHE3/5B at its stand-off voltage?
At its 33 V stand-off voltage (VWM), SMBJ33CAHE3/5B exhibits a maximum reverse leakage current of 1.0 µA at 25 °C, as specified in the Electrical Characteristics table. This low leakage ensures minimal power loss and signal interference in always-on or battery-powered circuits.
What PCB pad layout is recommended for optimal thermal performance of SMBJ33CAHE3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBJ33CAHE3/5B to achieve its rated thermal resistance of 100 °C/W. Using this layout ensures effective heat dissipation during repetitive surge events and supports reliable operation up to +150 °C junction temperature.
SMBJ33CAHE3/5B 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)
SMBJ33CAHE3/5B FAQ
1.How can I place an order for SMBJ33CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33CAHE3/5B 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 SMBJ33CAHE3/5B reliable?
The price and inventory of SMBJ33CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ33CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ33CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33CAHE3/5B?
SMBJ33CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33CAHE3/5B 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 SMBJ33CAHE3/5B?
For technical support, including SMBJ33CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ33CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ33CAHE3/5B 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 SMBJ33CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ33CAHE3/5B?
All SMBJ33CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33CAHE3/5B, 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 SMBJ33CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ33CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33CAHE3/5B Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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