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Vishay General Semiconductor - Diodes Division SMB10J28AHM3_B/I
- Part No.:
- SMB10J28AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHM3_B/I.pdf
- Description:
- 1KW,28V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,695
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Product details
Overview
SMB10J28AHM3_B/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 (10/1000 µs), 28 V stand-off voltage (VWM), and 45.4 V maximum clamping voltage at 22.0 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain and body electronics.
For engineers reviewing the SMB10J28AHM3_B/I datasheet, SMB10J28AHM3_B/I pinout, SMB10J28AHM3_B/I application, or SMB10J28AHM3_B/I equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade PCB reliability and automated SMT assembly.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its 31.1–34.4 V breakdown voltage (VBR at 1 mA), clamping transients to ≤45.4 V while conducting up to 22.0 A under standardized 10/1000 µs surge conditions. Its glass-passivated junction ensures stable leakage (<1.0 µA at 28 V) and fast response time (<1 ns).
Thermally, it features RθJL = 20 °C/W (junction-to-lead) and RθJA = 72 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm copper pads), enabling robust thermal dissipation in compact automotive modules. The SMB package supports reflow soldering at peak 260 °C per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 24 V automotive systems. |
| VBR (min/max) | 31.1 V / 34.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent overvoltage triggering across production lots. |
| VC @ IPPM | 45.4 V - Clamped voltage at 22.0 A peak pulse current; guarantees downstream ICs see <45.4 V during ISO 7637-2 Pulse 1/2/5a surges. |
| PPPM | 1000 W - Peak pulse power handling (10/1000 µs waveform); supports high-energy load dump suppression in vehicle ECUs. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 28 V; minimizes standby power loss in always-on automotive modules. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTOL, TCT, and ESD; required for ASIL-B/C system components. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by color band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side return path; must be routed with low-inductance trace for effective clamping. |
| Cathode | Current exit terminal during reverse avalanche clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); color band identifies this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and body controllers - eliminates need for additional qualification testing. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and OEM material declarations (e.g., GMW3059, Ford WSS-M99P9999-A1) without compromising surge robustness. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C), simplifying SMT line integration and reducing moisture-related defects. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over temperature (-55 °C to +150 °C), critical for long-term reliability in harsh environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 16750-2), improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Automotive Power Supply Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed microcontroller power rails in body control modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping transients before they reach LDO input. Use Value: Limits voltage to ≤45.4 V during 1000 W surges, preventing damage to 30 V-rated input stages and ensuring uninterrupted MCU operation. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS not applicable here; SMB10J28AHM3_B/I used on single-ended supply or bias rails feeding transceiver ICs. Use Value: Clamps supply rail spikes to 45.4 V while maintaining <1.0 µA leakage, preserving CAN common-mode range and bit error rate integrity. |
| Engine Control Unit (ECU) Sensor Interface | Industrial PLC Digital Input Protection |
|
Use Scenario: Shielding analog front-end circuits of oxygen or knock sensors from ignition coil coupling and alternator ripple. IC Role / Device Role / Timing Role: TVS placed at sensor signal conditioning stage input, shunting transients to ground before op-amp inputs. Use Value: With 31.1–34.4 V VBR, it remains inactive during normal 0–5 V sensor output but activates instantly for >35 V spikes, preserving ADC accuracy. |
Use Scenario: Hardening 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Unidirectional TVS connected between input terminal and chassis ground, absorbing repetitive 1000 W transients per IEC 61000-4-5. Use Value: Delivers 22.0 A peak surge current handling and 45.4 V clamping, meeting industrial immunity requirements without derating at 70 °C ambient. |
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/H | Same VWM (28 V), VBR (31.1–34.4 V), and PPPM (1000 W), but commercial-grade (non-AEC-Q101) and RoHS-compliant only (not halogen-free). | Lacks automotive qualification; suitable for industrial or consumer designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive compliance, and environmental specs permit brominated flame retardants. |
| SMCJ28A-QH | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs, AEC-Q101 qualified and halogen-free. | Requires larger PCB footprint and higher thermal mass; better suited for extreme surge environments (e.g., alternator load dump). | Choose when system-level surge testing exceeds 1000 W requirements or when board layout allows SMC package. |
Compared with SMBJ28AHE3_A/H, SMB10J28AHM3_B/I adds AEC-Q101 validation and halogen-free construction for automotive use; versus SMCJ28A-QH, it trades 500 W headroom for 30% smaller SMB footprint and lower thermal mass - optimizing space-constrained ECU designs.
Availability
SMB10J28AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and sensor interface modules requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB10J28AHM3_B/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
SMB10J28AHM3_B/I belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, high-power transient suppression in automotive power systems and industrial control interfaces.
FAQ
What is the clamping voltage of SMB10J28AHM3_B/I at its rated peak pulse current?
The SMB10J28AHM3_B/I has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 22.0 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay Document Number 88422, ensuring predictable overvoltage limiting for protected downstream circuitry such as microcontrollers or transceivers. The SMB10J28AHM3_B/I maintains this clamping performance across its qualified operating temperature range.
Is SMB10J28AHM3_B/I suitable for automotive applications?
Yes, SMB10J28AHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it fully compliant for automotive use in engine control units, body electronics, and ADAS sensor modules. Its 150 °C maximum junction temperature, MSL Level 1 rating, and validated surge performance per ISO 7637-2 confirm suitability for under-hood and chassis-mounted applications. The SMB10J28AHM3_B/I meets OEM requirements for long-term reliability in harsh environments.
What does the "HM3_B/I" suffix indicate in SMB10J28AHM3_B/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification; "B" indicates revision level B of the base design; "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This full suffix confirms the SMB10J28AHM3_B/I part meets automotive environmental and logistics standards - distinct from commercial variants like E3 or HE3. Traceability and compliance documentation are provided with every SMB10J28AHM3_B/I shipment.
How does SMB10J28AHM3_B/I differ from bidirectional TVS diodes with similar voltage ratings?
SMB10J28AHM3_B/I is unidirectional, meaning it conducts only during reverse-biased overvoltage events and blocks forward current - ideal for DC power rail protection. Bidirectional variants (e.g., SMB8J28CA) conduct in both directions and are used on AC or differential lines like USB or CAN. The SMB10J28AHM3_B/I's 28 V stand-off voltage and 31.1–34.4 V breakdown apply only in reverse; forward voltage drop is not specified since it is not intended for forward conduction.
What is the thermal resistance of SMB10J28AHM3_B/I, and how does it affect PCB layout?
SMB10J28AHM3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain reliability under repeated surges, PCB layout must provide adequate copper area and thermal vias to minimize temperature rise. Reducing pad size below the recommended 0.2" × 0.2" increases RθJA and risks exceeding the 150 °C TJ limit - a key design constraint for the SMB10J28AHM3_B/I in high-duty-cycle applications.
SMB10J28AHM3_B/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:
- Active
- 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_B/I FAQ
1.How can I place an order for SMB10J28AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHM3_B/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_B/I reliable?
The price and inventory of SMB10J28AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J28AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHM3_B/I?
SMB10J28AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHM3_B/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_B/I?
For technical support, including SMB10J28AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHM3_B/I requirements.
6.How does Aetrix verify that SMB10J28AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J28AHM3_B/I?
All SMB10J28AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMB10J28AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHM3_B/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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