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Vishay General Semiconductor - Diodes Division SMB10J33AHM3/H
- Part No.:
- SMB10J33AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J33AHM3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,290
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Product details
Overview
SMB10J33AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection 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 clamping voltage (VC) at 18.8 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs to protect CAN transceivers and microcontroller I/O against load dump and ISO 7637-2 transients.
For engineers reviewing the SMB10J33AHM3/H datasheet, SMB10J33AHM3/H pinout, SMB10J33AHM3/H application, or SMB10J33AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping behavior under surge, and direct replacement guidance for automotive-grade circuit protection design.
Technical Context
This device operates as a silicon avalanche diode, leveraging glass-passivated junction technology to achieve fast response (<1 ps) and low incremental surge resistance. Its unidirectional polarity enables integration into DC-biased rails where reverse conduction must be blocked while clamping positive transients.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB10J33AHM3/H supports automotive applications requiring robustness against repetitive surges, including 100 A non-repetitive forward surge current (IFSM) and MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - maximum continuous reverse voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1 mA - onset of avalanche conduction; ensures reliable turn-on before system damage occurs |
| VC (Clamping Voltage) | 53.3 V at 18.8 A (10/1000 µs) - peak voltage seen by protected IC during worst-case surge; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 1000 W - energy-handling capacity for standardized 10/1000 µs transient; validates suitability for ISO 7637-2 Pulse 5a/b |
| RθJA (Thermal Resistance) | 72 °C/W - junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - withstands single-event load dump without failure; critical for 12 V automotive battery line protection |
| AEC-Q101 Qualified | Yes - validated for automotive use per stress test requirements including HTGB, HTRB, TCT, and ESD; suffix HM3 denotes halogen-free RoHS compliance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by color band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return; completes clamping loop during positive transient |
| Cathode | Protected line connection / Surge input | Connected to line being protected (e.g., CAN_H, LIN, 12 V rail); conducts avalanche current to anode when VPK > VC |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature; eliminates risk of junction degradation under repeated surges |
| AEC-Q101 qualification (HM3 suffix) | Validates reliability for automotive underhood and cabin applications including engine control, ADAS sensors, and body electronics |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without preconditioning; eliminates moisture-related popcorning during reflow |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and automotive material restrictions; compatible with green manufacturing and end-of-life recycling |
| Low incremental surge resistance | Minimizes VC rise under high di/dt events; improves clamping precision for sensitive 3.3 V or 5 V logic interfaces |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients up to 1000 W without forward conduction. Use Value: Limits peak voltage to 53.3 V during 18.8 A surge, preventing latch-up or burnout of LDO regulators and MCU power domains. |
Use Scenario: Safeguarding high-speed CAN_H/CAN_L differential pair against ESD and coupled transients in vehicle networking modules. IC Role / Device Role / Timing Role: Two SMB10J33AHM3/H devices used in back-to-back configuration on each line to absorb ±15 kV contact ESD (IEC 61000-4-2) and burst noise. Use Value: Clamps within <1 ps to preserve signal integrity; 53.3 V clamping avoids exceeding CAN transceiver absolute max ratings (typically ±40 V common-mode). |
| Industrial Sensor Signal Line Protection | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from switching noise in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS on 24 V supply line feeding op-amp signal conditioning stages to suppress inductive kickback from solenoid drivers. Use Value: Withstands 100 A surge current (8.3 ms) and maintains <1 µA leakage at 33 V, ensuring minimal offset error in precision measurement paths. |
Use Scenario: Guarding triac gate drive inputs in smart washing machine motor controllers against commutation spikes from universal motors. IC Role / Device Role / Timing Role: TVS placed across opto-triac input to clamp voltage overshoot during zero-cross detection failures or relay bounce. Use Value: 1000 W peak power rating absorbs repetitive 10/1000 µs spikes without degradation; AEC-Q101 qualification ensures long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Same VWM/VC, but commercial-grade (non-AEC-Q101); RθJA = 72 °C/W identical; no halogen-free guarantee | Limited to industrial/commercial systems without automotive qualification requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized over automotive traceability |
| SMCJ33A-HM3 | Higher PPPM = 1500 W; larger SMC (DO-214AB) package; same VWM/VC; RθJA = 40 °C/W | Better thermal performance and surge margin; requires larger PCB footprint and higher mounting pad area | Choose for designs needing extended surge endurance beyond 1000 W or improved thermal headroom in high-ambient environments |
Compared with SMB10J33AHM3/H, SMBJ33A-E3/52 offers identical electrical protection but lacks automotive qualification and halogen-free assurance, while SMCJ33A-HM3 provides higher power handling and lower thermal resistance at the cost of increased board space - making SMB10J33AHM3/H optimal for space-constrained AEC-Q101-compliant automotive PCBs.
Availability
SMB10J33AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor drives requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB10J33AHM3/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, power efficiency, and automotive-grade validation.
SMB10J33AHM3/H belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB10J33AHM3/H at its rated peak pulse current?
The SMB10J33AHM3/H has a maximum clamping voltage (VC) of 53.3 V at 18.8 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The SMB10J33AHM3/H achieves this clamping performance while maintaining low leakage and fast response.
Is SMB10J33AHM3/H qualified for automotive applications?
Yes, SMB10J33AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HM3", which denotes halogen-free, RoHS-compliant, and automotive-qualified construction. This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and ESD - validating SMB10J33AHM3/H for under-hood and cabin applications such as engine control, ADAS, and body electronics.
What does the "HM3" suffix mean in SMB10J33AHM3/H?
The "HM3" suffix in SMB10J33AHM3/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., "E3") and confirms compliance with automotive material standards, JEDEC MSL Level 1 reflow capability (260 °C peak), and whisker resistance per JESD 201 Class 2. The "H" prefix in HM3 explicitly denotes automotive qualification, and the "M3" confirms halogen-free molding compound - both essential for SMB10J33AHM3/H deployment in certified automotive systems.
Can SMB10J33AHM3/H be used in bidirectional configurations?
No, SMB10J33AHM3/H is a unidirectional TVS diode, as indicated by its part number structure and electrical specifications - it features a cathode band and is rated only for clamping positive transients relative to ground. For bidirectional protection, Vishay offers the SMB8J33CA series (e.g., SMB8J33CAHM3/H), which provides symmetrical clamping for AC or differential lines. Using SMB10J33AHM3/H in bidirectional mode would result in forward conduction during negative excursions and potential failure.
What is the thermal resistance of SMB10J33AHM3/H, and how does it affect layout?
SMB10J33AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts PCB layout: insufficient copper area increases junction temperature during repetitive surges, accelerating degradation. To maintain reliability, designers must adhere to Vishay's recommended pad dimensions and avoid thermal bottlenecks - especially critical for SMB10J33AHM3/H in automotive applications where ambient temperatures exceed 85 °C.
SMB10J33AHM3/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:
- 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):
- 18.8A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J33AHM3/H FAQ
1.How can I place an order for SMB10J33AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J33AHM3/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 SMB10J33AHM3/H reliable?
The price and inventory of SMB10J33AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J33AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J33AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J33AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J33AHM3/H?
SMB10J33AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J33AHM3/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 SMB10J33AHM3/H?
For technical support, including SMB10J33AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J33AHM3/H requirements.
6.How does Aetrix verify that SMB10J33AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J33AHM3/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 SMB10J33AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J33AHM3/H?
All SMB10J33AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J33AHM3/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 SMB10J33AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J33AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J33AHM3/H Tags
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