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Vishay General Semiconductor - Diodes Division SMB10J28AHM3_A/I
- Part No.:
- SMB10J28AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHM3_A/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,123
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Product details
Overview
SMB10J28AHM3_A/I 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 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 22.0 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial power supply rails.
For engineers reviewing the SMB10J28AHM3_A/I datasheet, SMB10J28AHM3_A/I pinout, SMB10J28AHM3_A/I application, or SMB10J28AHM3_A/I equivalent, this device is evaluated for AEC-Q101-compliant transient suppression in 12 V/24 V automotive systems, DC power input stages, and I/O line protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA leakage at 28 V; during transients exceeding VBR, it avalanches to clamp voltage ≤45.4 V while diverting up to 22.0 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for surface-mount automated assembly, SMB10J28AHM3_A/I meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 150 °C max junction temperature, and delivers thermal resistance of 72 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads - enabling robust thermal performance in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for 24 V nominal systems. |
| VBR min/max | 31.1 V / 34.4 V at 1 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 45.4 V at 22.0 A - clamping voltage limits downstream IC stress during 10/1000 µs surges per ANSI/IEEE C62.35. |
| PPPM | 1000 W - peak pulse power handling capacity with 10/1000 µs waveform, enabling protection against ISO 7637-2 Pulse 1/2a/5a events. |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting inrush and load-dump immunity in automotive power paths. |
| TJ max | +150 °C - extended junction temperature rating allows operation in under-hood and industrial environments without derating. |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline (4.57 mm × 3.94 mm × 2.20 mm), compatible with IPC-7351B footprint and pick-and-place equipment. |
Pinout & Package
SMB10J28AHM3_A/I uses the SMB (DO-214AA) surface-mount package: cathode-indicated by a color band on the body; matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 whisker testing (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or lower-potential rail; enables unidirectional clamping from protected line to GND. |
| Cathode | Reverse-biased terminal / protected line interface | Connected to the line being protected (e.g., 24 V supply or CAN_H); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - required for engine control, ADAS, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during transients, improving system-level robustness. |
| MSL Level 1 (260 °C) | Enables single-pass lead-free reflow without moisture sensitivity concerns - eliminates bake requirements and streamlines manufacturing. |
| Glass-passivated junction | Provides stable electrical parameters over time and temperature, reducing parameter drift in long-life industrial deployments. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations - supports sustainability compliance for global OEMs. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and chassis ground to clamp surges within 1 ns. Use Value: Limits voltage to ≤45.4 V during 1000 W transients, preventing damage to 36 V-rated DC-DC converters and MCU power supplies. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital I/O (CAN, LIN) in factory automation sensors. IC Role / Device Role / Timing Role: Unidirectional clamping element on signal lines referenced to local ground, absorbing ESD and inductive kickback. Use Value: Sub-1 ns response and <1 µA leakage at 28 V preserve signal integrity while meeting IEC 61000-4-2 Level 4 (±15 kV air) requirements. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Surge protection on -48 V telecom rectifier outputs exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution bus prior to point-of-load regulators. Use Value: 1000 W PPPM rating handles multi-kA induced surges; SMB footprint enables dense placement near connectors without thermal crowding. |
Use Scenario: Input stage protection for BLDC motor drivers in washing machines and HVAC systems subjected to relay contact bounce and coil flyback. IC Role / Device Role / Timing Role: Fast-acting shunt suppressor across bridge rectifier output or gate driver supply rails. Use Value: 100 A IFSM rating withstands repetitive 8.3 ms inrush currents; 150 °C TJ rating sustains operation near hot motor windings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHE3_A/I | Same VWM (28 V), VBR (31.1–34.4 V), and VC (45.4 V), but rated for 600 W PPPM (vs. 1000 W). | Limited to lower-energy transients (e.g., IEC 61000-4-4 Level 3); insufficient for ISO 7637-2 Pulse 5a in 24 V systems. | Select when cost sensitivity outweighs peak surge margin and layout space permits parallel devices. |
| 1.5SMC28AH | Same electrical specs but in larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); RθJA = 30 °C/W vs. 72 °C/W. | Better thermal dissipation allows sustained surge duty cycles; incompatible with SMB footprints - requires PCB redesign. | Choose when thermal management dominates over board area, and AEC-Q101 is not mandatory. |
Compared with SMBJ28AHE3_A/I and 1.5SMC28AH, SMB10J28AHM3_A/I uniquely combines AEC-Q101 qualification, 1000 W surge capability, and SMB footprint - making it the only option satisfying automotive-grade 24 V power rail protection without layout or thermal compromise.
Availability
SMB10J28AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power distribution systems requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMB10J28AHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB10JxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum clamping voltage of SMB10J28AHM3_A/I at its rated peak pulse current?
The SMB10J28AHM3_A/I has a maximum clamping voltage (VC) of 45.4 V at its specified peak pulse current (IPPM) of 22.0 A with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry. The SMB10J28AHM3_A/I maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMB10J28AHM3_A/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J28AHM3_A/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation revision 09-Jan-2024 (Document Number: 88422). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it approved for use in engine control, body electronics, and ADAS subsystems. The SMB10J28AHM3_A/I meets all required failure rate and reliability thresholds for automotive deployment.
What is the thermal resistance of SMB10J28AHM3_A/I, and how does it affect PCB layout?
The SMB10J28AHM3_A/I 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 assumes standard FR-4 PCB construction and dictates minimum pad area and copper weight for reliable thermal management. To avoid junction temperature exceedance during repeated surges, designers must allocate adequate copper pour and avoid excessive trace length between SMB10J28AHM3_A/I terminals and ground/power planes.
Does SMB10J28AHM3_A/I support lead-free reflow assembly, and what is its moisture sensitivity level?
Yes, SMB10J28AHM3_A/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C - fully compatible with standard lead-free soldering processes without pre-bake. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the molding compound complies with UL 94 V-0 flammability. The SMB10J28AHM3_A/I can be stored indefinitely in dry pack and placed directly into reflow ovens, simplifying manufacturing flow.
How does the breakdown voltage tolerance of SMB10J28AHM3_A/I impact circuit design margins?
The SMB10J28AHM3_A/I has a specified breakdown voltage (VBR) range of 31.1 V to 34.4 V at 1 mA test current, yielding ±5.3% tolerance. This tight spread allows designers to set precise overvoltage thresholds - for example, ensuring clamping initiates well above 28 V VWM but below 36 V absolute maximum ratings of common 24 V system ICs. The SMB10J28AHM3_A/I's consistent VBR minimizes need for derating in safety-critical automotive designs.
SMB10J28AHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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)
SMB10J28AHM3_A/I FAQ
1.How can I place an order for SMB10J28AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHM3_A/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 SMB10J28AHM3_A/I reliable?
The price and inventory of SMB10J28AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB10J28AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHM3_A/I?
SMB10J28AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHM3_A/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 SMB10J28AHM3_A/I?
For technical support, including SMB10J28AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHM3_A/I requirements.
6.How does Aetrix verify that SMB10J28AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHM3_A/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 SMB10J28AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB10J28AHM3_A/I?
All SMB10J28AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHM3_A/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 SMB10J28AHM3_A/I part is unused and in its original packaging.
Return procedure for SMB10J28AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHM3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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