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Vishay General Semiconductor - Diodes Division SMB10J28AHM3/I
- Part No.:
- SMB10J28AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHM3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
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Product details
Overview
SMB10J28AHM3/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 DC power rails and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 1000 W peak pulse power (10/1000 µs), 22.0 A peak pulse current (IPPM), and clamps to ≤45.4 V under surge. It is used in automotive sensor interfaces and industrial I/O protection where AEC-Q101 qualification and low clamping ratio are critical.
For engineers reviewing the SMB10J28AHM3/I datasheet, SMB10J28AHM3/I pinout, SMB10J28AHM3/I application, or SMB10J28AHM3/I equivalent, this page delivers verified electrical specs, AEC-Q101 compliance status, clamping performance at rated surge current, thermal resistance (RθJA = 72 °C/W), and halogen-free RoHS-compliant sourcing details - all confirmed from Vishay's official 88422 document revision 09-Jan-2024.
Technical Context
This device operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to ESD and lightning-induced transients per IEC 61000-4-2/4-5. Its low incremental surge resistance and tight VBR tolerance (±5%) ensure consistent clamping across production lots.
Rated for -55 °C to +150 °C junction temperature, it supports automotive under-hood applications and meets MSL Level 1 (260 °C reflow). The cathode-band polarity marking and matte tin-plated leads comply with J-STD-002 solderability and JESD22-B102 whisker testing Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe DC rail margin. |
| VBR @ IT = 1 mA | 31.1–34.4 V - Breakdown threshold range; ensures reliable turn-on above system nominal voltage. |
| VC @ IPPM | ≤45.4 V - Clamped voltage at 22.0 A surge; limits downstream IC stress during 10/1000 µs transients. |
| PPPM | 1000 W - Peak pulse power handling (10/1000 µs); enables protection against ISO 7637-2 Pulse 1/2a/5a surges. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs board-level thermal design. |
| Qualification | AEC-Q101 qualified, halogen-free, RoHS-compliant - certified for automotive electronics per HM3 suffix. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Mounting pad layout per Vishay spec: 5.59 mm × 1.52 mm minimum pad length/width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; carries forward surge current up to 100 A (8.3 ms half-sine). |
| Cathode | Reverse-biased clamping terminal | Marked with color band; sinks transient energy into ground or return path when VIN > VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables asymmetric protection on positive-rail systems without blocking normal forward bias operation. |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS sensors, and body control modules requiring extended temperature cycling. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage exposure to downstream MOSFETs or microcontrollers during surge events. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced damage. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle chassis modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply rail and ground, clamping spikes before they reach ASIC input pins. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/300 ms) while meeting AEC-Q101 lifetime requirements. |
Use Scenario: Safeguarding 24 V DC digital input cards in programmable logic controllers against field-wiring surge and ground bounce. IC Role / Device Role / Timing Role: Primary surge shunt on channel-level power entry, coordinated with upstream fuses and filtering. Use Value: Withstands repeated 1 kV/500 A surges (per IEC 61000-4-5) without degradation due to robust glass-passivated junction. |
| Consumer Power Adapter Output | Telecom Base Station DC Feeds |
|
Use Scenario: Secondary-side overvoltage suppression on USB-C PD and 12 V wall adapter outputs exposed to cable coupling and hot-plug events. IC Role / Device Role / Timing Role: Fast-clamping element parallel to output capacitor, limiting transient overshoot during fault conditions. Use Value: Achieves <1 ns response and ≤45.4 V clamping at 22 A, preventing latch-up in connected devices. |
Use Scenario: DC power feed protection in remote radio units (RRUs), where outdoor-rated 48 V supplies face lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense on -48 V return path, working with GDTs and MOVs in multi-stage architecture. Use Value: 1000 W peak power rating and 72 °C/W thermal resistance enable stable operation in sealed enclosures up to +85 °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 | Same VWM (28 V), identical SMB package, but commercial-grade (E3), not AEC-Q101 qualified; RθJA = 72 °C/W same. | Lacks automotive qualification; suitable for industrial/commercial designs without AEC-Q101 mandate. | Select SMBJ28AHE3/A only if AEC-Q101 is not required and halogen-free is not mandatory. |
| SMAJ28A-QH | SMA (DO-214AC) package - smaller footprint (4.06 mm × 2.54 mm), lower PPPM (400 W), higher VC (49.9 V at 8.3 A). | Lower surge capacity and larger clamping voltage limit use to low-energy signal lines, not power rails. | Choose SMAJ28A-QH only for space-constrained, non-automotive signal-level protection where 400 W suffices. |
Compared with SMBJ28AHE3/A, SMB10J28AHM3/I adds AEC-Q101 qualification and halogen-free compliance without sacrificing power rating or clamping performance; versus SMAJ28A-QH, it delivers 2.5× higher surge power in a slightly larger but thermally superior SMB package - critical for sustained 24/48 V rail protection.
Availability
SMB10J28AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB10J28AHM3/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 automotive-grade validation.
The SMB10J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, high-reliability transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of SMB10J28AHM3/I at its rated peak pulse current?
The SMB10J28AHM3/I clamps to a maximum of 45.4 V when subjected to its rated peak pulse current of 22.0 A (10/1000 µs waveform), as specified in Vishay document 88422, Table "UNIDIRECTIONAL" on page 2. This value ensures downstream ICs see controlled overvoltage during surge events, directly supporting robust design margins in 24 V automotive and industrial systems.
Is SMB10J28AHM3/I qualified for automotive applications?
Yes, SMB10J28AHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit listing in the "Automotive ordering code" section of Vishay's 88422 datasheet. It is rated for operation from -55 °C to +150 °C and passes MSL Level 1 reflow, making SMB10J28AHM3/I suitable for engine control units, ADAS camera modules, and other under-hood or cabin-mounted automotive electronics.
What does the "HM3" suffix indicate for SMB10J28AHM3/I?
The "HM3" suffix on SMB10J28AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering table (page 3), HM3 parts use molding compounds and terminations that meet JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance, distinguishing them from commercial E3/M3 variants and confirming suitability for regulated automotive supply chains.
How does SMB10J28AHM3/I differ from SMBJ28AHE3/A?
SMB10J28AHM3/I and SMBJ28AHE3/A share identical electrical specs (VWM = 28 V, VC ≤ 45.4 V, PPPM = 1000 W) and SMB package, but SMB10J28AHM3/I carries HM3 suffix - meaning it is halogen-free and AEC-Q101 qualified, whereas SMBJ28AHE3/A is commercial-grade E3. This makes SMB10J28AHM3/I mandatory for automotive Tier 1 suppliers requiring full compliance documentation.
What is the thermal resistance of SMB10J28AHM3/I, and how does it impact PCB layout?
SMB10J28AHM3/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, as stated in the Thermal Characteristics table (page 3). This value requires adequate copper pour and thermal vias in PCB layout to maintain TJ ≤ 150 °C during repetitive surge events - especially critical in enclosed automotive or industrial enclosures with limited airflow.
SMB10J28AHM3/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):
- 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/I FAQ
1.How can I place an order for SMB10J28AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHM3/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/I reliable?
The price and inventory of SMB10J28AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMB10J28AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHM3/I?
SMB10J28AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHM3/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/I?
For technical support, including SMB10J28AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHM3/I requirements.
6.How does Aetrix verify that SMB10J28AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMB10J28AHM3/I?
All SMB10J28AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHM3/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/I part is unused and in its original packaging.
Return procedure for SMB10J28AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHM3/I Tags
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DESD3V3E1BL-7B
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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