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Vishay General Semiconductor - Diodes Division SMB10J33AHM3/I
- Part No.:
- SMB10J33AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J33AHM3/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,863
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Product details
Overview
SMB10J33AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power rating, 33 V stand-off voltage (VWM), and 53.3 V clamping voltage at 18.8 A peak pulse current. It is AEC-Q101 qualified and used to safeguard automotive sensor signal lines, power rails, and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMB10J33AHM3/I datasheet, SMB10J33AHM3/I pinout, SMB10J33AHM3/I application, or SMB10J33AHM3/I equivalent, this device delivers verified automotive-grade transient suppression with low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for under-hood ECUs and ADAS sensor interfaces.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response to transients. Its unidirectional polarity enables integration on DC-biased lines without reverse conduction during normal operation.
Rated for -55 °C to +150 °C junction temperature, it supports automotive thermal environments and derates predictably above 25 °C per Fig. 2. With 72 °C/W junction-to-ambient thermal resistance and 20 °C/W junction-to-lead, it requires minimum 5.0 mm × 5.0 mm copper pads per terminal for full 1000 W pulse handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuit. |
| VBR min / max | 36.7 V / 40.6 V at 1 mA - Breakdown threshold range ensures consistent turn-on across production lots under standardized test conditions. |
| VC @ IPPM | 53.3 V at 18.8 A - Clamping voltage during 10/1000 µs surge; limits downstream voltage stress to ≤53.3 V under worst-case 1000 W transient. |
| PPPM | 1000 W - Peak pulse power handling capability with 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1/2a/5a surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating; supports single-event load dump immunity when placed in series with power path. |
| Leakage ID | 1.0 µA max at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-critical systems. |
| TJ max | +150 °C - Enables placement near heat sources in engine control modules without thermal derating penalties. |
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 point during clamping | Connected to lower-potential side of protected line (e.g., GND or return path); must be routed with low-inductance trace. |
| Cathode | Reverse-biased terminal during normal operation | Connected to higher-potential side (e.g., VCC or signal line); color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control, transmission, and ADAS sensors - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Glass passivated junction | Ensures stable breakdown characteristics and long-term reliability under humidity and thermal cycling; eliminates risk of junction corrosion in harsh environments. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without pre-baking; compatible with automated SMT lines using JEDEC-compliant profiles. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 16750-2 load dump edges), improving clamping precision beyond basic V-I curve specs. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills EU ELV and China RoHS environmental mandates; supports sustainable manufacturing and end-of-life recycling compliance. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Signal Interface |
|---|---|
Use Scenario: Protection of 5 V sensor supply rail against load dump and alternator ripple in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VCC and GND, absorbing energy from ISO 7637-2 Pulse 5a (75 V, 400 ms). Use Value: Limits rail voltage to ≤53.3 V during surge, preventing latch-up or damage to MCU I/O and analog front-end ICs. |
Use Scenario: Guarding RS-485 differential signal lines in variable-frequency drive control boards exposed to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMB10J33AHM3/I is unidirectional, used in back-to-back configuration or with complementary device) suppressing common-mode transients up to ±1 kV. Use Value: Maintains signal integrity below 53.3 V clamping level, ensuring UART communication remains error-free during 10/1000 µs surges. |
| ADAS Camera Module Power Input | Automotive Body Control Module (BCM) LIN Bus Line |
Use Scenario: Safeguarding 12 V input to image sensor SoC in rear-view or surround-view camera housings subject to jump-start transients. IC Role / Device Role / Timing Role: Primary TVS on main power rail upstream of DC/DC converter; handles 1000 W pulses per ISO 16750-2. Use Value: Prevents brownout or reset events by clamping surge voltage before it reaches sensitive imaging pipeline components. |
Use Scenario: Protecting LIN transceiver I/O pins from ESD and inductive kickback generated by solenoid actuation in door lock or mirror control circuits. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional TVS placed between LIN bus and ground, preserving bus bias during idle state. Use Value: Enables reliable LIN communication down to 10.4 kbps while surviving 8 kV contact ESD per ISO 10605 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/A | Same VWM (33 V), same SMB package, but rated for 600 W PPPM (vs. 1000 W) and lacks AEC-Q101 qualification. | Suitable for commercial-grade industrial controls but not automotive under-hood use due to lower surge rating and qualification gap. | Select SMBJ33AHE3/A only if system-level surge testing confirms <600 W requirement and AEC-Q101 is not mandated. |
| SAC33H | Higher 1500 W PPPM, same VWM, but in larger SMC (DO-214AB) package; 1.5× footprint area and 2.5× thermal mass. | Preferred where board space allows and thermal dissipation >1000 W is required; not drop-in due to different pad layout and height. | Choose SAC33H when protecting high-power actuators or inverters where sustained surge energy exceeds SMB10J33AHM3/I's 1000 W limit. |
Compared with SMBJ33AHE3/A and SAC33H, SMB10J33AHM3/I uniquely balances automotive qualification, 1000 W surge capacity, and SMB footprint - making it optimal for space-constrained, thermally demanding ECU and ADAS modules where both reliability and miniaturization are critical.
Availability
SMB10J33AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, and ADAS camera systems requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB10J33AHM3/I 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, automotive qualification, and high-power density packaging.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for automotive-grade transient suppression in engine, chassis, and infotainment systems where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB10J33AHM3/I at its rated peak pulse current?
The SMB10J33AHM3/I has a maximum clamping voltage (VC) of 53.3 V at its specified peak pulse current (IPPM) of 18.8 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains within safe operating voltage limits during surge events. The SMB10J33AHM3/I maintains this clamping performance across its full operating temperature range.
Is SMB10J33AHM3/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J33AHM3/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88422 (Rev. 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD, making it appropriate for engine control units, body control modules, and ADAS systems. The SMB10J33AHM3/I meets all requirements for under-hood deployment.
How does the HM3 suffix differ from the M3 or HE3 suffix in Vishay's SMB10J series?
The HM3 suffix on SMB10J33AHM3/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. In contrast, M3 indicates halogen-free/RoHS compliance without AEC-Q101, and HE3 indicates RoHS compliance with AEC-Q101 but contains halogens. The SMB10J33AHM3/I thus satisfies both environmental and automotive reliability mandates simultaneously - a distinction critical for Tier 1 automotive supply chains.
What is the recommended PCB pad layout for SMB10J33AHM3/I to achieve full 1000 W pulse rating?
To achieve the full 1000 W peak pulse power rating, SMB10J33AHM3/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads cause thermal derating and reduce surge capability. The SMB10J33AHM3/I datasheet Figure 2 provides exact derating curves, showing >20% power loss at 70 °C junction temperature with undersized pads.
Can SMB10J33AHM3/I be used in bidirectional transient protection circuits?
No - SMB10J33AHM3/I is a unidirectional TVS diode, intended for DC-biased lines where reverse conduction is not required. For bidirectional protection (e.g., AC signal lines or data buses), a dedicated bidirectional part like SMB8J33CAHM3/I must be used. Using SMB10J33AHM3/I in bidirectional configurations risks failure during negative transients, as it lacks symmetrical breakdown behavior. Always match device polarity to circuit topology.
SMB10J33AHM3/I 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/I FAQ
1.How can I place an order for SMB10J33AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J33AHM3/I 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/I reliable?
The price and inventory of SMB10J33AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J33AHM3/I is usually 5 days.
3.What payment methods are accepted for SMB10J33AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J33AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J33AHM3/I?
SMB10J33AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J33AHM3/I 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/I?
For technical support, including SMB10J33AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J33AHM3/I requirements.
6.How does Aetrix verify that SMB10J33AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB10J33AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMB10J33AHM3/I?
All SMB10J33AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J33AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for SMB10J33AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J33AHM3/I Tags
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DESD3V3E1BL-7B
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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