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Vishay General Semiconductor - Diodes Division SMB10J28AHE3_A/H
- Part No.:
- SMB10J28AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHE3_A/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
SMB10J28AHE3_A/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 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 AEC-Q101 qualified and used in automotive power supply input stages.
For engineers reviewing the SMB10J28AHE3_A/H datasheet, SMB10J28AHE3_A/H pinout, SMB10J28AHE3_A/H application, or SMB10J28AHE3_A/H equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal derating above 25 °C, PCB pad layout per JEDEC MS-012, and AEC-Q101 compliance verification for automotive ECUs.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and lightning-induced transients. Its unidirectional polarity provides forward conduction path during overvoltage events while blocking reverse leakage below 1 µA at 28 V.
The device is rated for 150 °C max junction temperature and exhibits low incremental surge resistance, ensuring stable clamping performance across repetitive surge events. Thermal resistance is 72 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting robust thermal management in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous DC or RMS operating voltage before clamping initiates; sets minimum system operating margin. |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal rail voltage. |
| VC (Clamping Voltage) | ≤45.4 V at 22.0 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; must be below downstream IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 1000 W (10/1000 µs) - Energy-handling capacity for standardized surge waveforms; defines single-event survivability. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Forward surge capability for AC-coupled or inductive-switching events; supports motor driver protection. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; compatible with standard SMT reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry during clamping | Connected to protected line (e.g., battery feed); conducts surge current toward ground when V > VBR. |
| Cathode | Reverse-biased terminal / clamping reference | Connected to system ground; establishes VWM and VBR thresholds; color band identifies this end. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates risk of junction corrosion in harsh under-hood environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving clamping precision. |
| MSL Level 1 rating | Enables direct placement into high-volume SMT lines without dry-pack or baking - reduces manufacturing cost and cycle time. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets automotive flammability requirements for PCB-mounted components near heat sources. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECU power input subjected to load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input; absorbs >95 % of 1000 W surge energy. Use Value: Limits voltage to ≤45.4 V during 22 A transient, protecting downstream regulators rated to 48 V abs max. |
Use Scenario: CAN or LIN bus lines exposed to ESD (IEC 61000-4-2) and inductive coupling from nearby solenoids. IC Role / Device Role / Timing Role: Bidirectional protection not applicable here; SMB10J28AHE3_A/H used on unidirectional supply rails feeding sensor analog front-ends. Use Value: Clamps transients within <1 ns while adding <0.5 pF capacitance - preserves signal integrity on 100 kHz sensor outputs. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Protection |
|
Use Scenario: 24 V output of wall adapter powering IoT gateway, subject to accidental short-circuit recovery spikes. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated output rail; activated only during fault conditions exceeding 28 V. Use Value: Withstands 100 A 8.3 ms surge (IFSM), preventing latch-up or burnout during repeated hot-plug events. |
Use Scenario: -48 V telecom DC feeder line exposed to lightning-induced surges per IEC 61000-4-5 (10/1000 µs). IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail; handles differential-mode surges between tip/ring and ground. Use Value: Delivers 1000 W pulse power handling with ≤45.4 V clamping - maintains safe margin below -48 V system's 60 V abs max rating. |
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), identical SMB package, but lower PPPM (600 W) and IPPM (17.3 A); no AEC-Q101 qualification. | Not suitable for automotive under-hood use; limited to commercial-grade industrial or consumer power rails. | Select only if surge threat level is ≤600 W and AEC-Q101 is not required. |
| 1.5SMC28AH | Same VWM and VBR range, but SMC (DO-214AB) package - 2.5 mm wider, higher RθJA (50 °C/W), and no AEC-Q101 rating. | Requires larger PCB area; thermal performance inferior in confined enclosures; unsuitable for automotive qualification programs. | Choose only when existing SMC footprint exists and automotive qualification is unnecessary. |
Compared with SMBJ28AHE3_A/H and 1.5SMC28AH, SMB10J28AHE3_A/H uniquely delivers 1000 W surge capability in an AEC-Q101-qualified SMB package - enabling space-constrained, high-reliability automotive designs without footprint or thermal compromise.
Availability
SMB10J28AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power distribution requiring stable component supply and long-term lifecycle assurance.
Supply support for SMB10J28AHE3_A/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 and application-specific performance.
The SMB10J series targets high-power transient suppression in automotive and industrial systems, engineered to meet AEC-Q101 and deliver consistent clamping under extreme thermal and electrical stress.
FAQ
What is the clamping voltage of SMB10J28AHE3_A/H at its rated peak pulse current?
The SMB10J28AHE3_A/H clamps to a maximum of 45.4 V when subjected to its rated 22.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on the protected circuit during surge events. The SMB10J28AHE3_A/H maintains this clamping performance across its full operating temperature range, making it suitable for automotive under-hood applications where ambient temperatures exceed 100 °C.
Is SMB10J28AHE3_A/H suitable for bidirectional signal line protection?
No, SMB10J28AHE3_A/H is a unidirectional TVS diode and must not be used on bidirectional data lines like USB, RS-485, or CAN without external biasing. Its cathode-band marking indicates polarity-sensitive installation, and reverse conduction occurs only above VBR. For bidirectional protection, Vishay offers the SMB8J28CAHE3_A/H variant - which shares the same VWM and clamping but supports symmetrical surge suppression in both directions. Always verify polarity alignment before placing SMB10J28AHE3_A/H in-circuit.
Does SMB10J28AHE3_A/H require derating at elevated ambient temperatures?
Yes, SMB10J28AHE3_A/H must be derated above 25 °C ambient per Figure 2 in Vishay document 88422. At 85 °C ambient, its 1000 W peak pulse power rating drops to approximately 650 W, and IPPM reduces proportionally. Derating is based on junction temperature limits (150 °C max) and thermal resistance (RθJA = 72 °C/W). To maintain full rating, ensure PCB copper pad layout matches the 0.2" × 0.2" (5.0 mm × 5.0 mm) per-terminal recommendation and avoid thermal crowding near the SMB10J28AHE3_A/H location.
What does the "HE3" suffix indicate in SMB10J28AHE3_A/H?
"HE3" denotes RoHS-compliant construction with AEC-Q101 qualification - confirming that SMB10J28AHE3_A/H meets automotive-grade reliability standards including temperature cycling, highly accelerated life testing (HALT), and ESD immunity. The "_A/H" revision code specifies the manufacturing lot and tape-and-reel packaging format (7" reel, 750 units). This suffix distinguishes it from commercial-grade variants like SMB10J28AE3, which lack AEC-Q101 validation and are unsuitable for automotive production.
Can SMB10J28AHE3_A/H replace SMBJ28AHE3_A/H in an existing design?
SMB10J28AHE3_A/H is not a drop-in replacement for SMBJ28AHE3_A/H due to higher surge ratings (1000 W vs. 600 W) and tighter thermal constraints - though both share the same SMB footprint and VWM. Substituting requires verifying that the PCB layout provides adequate copper area for thermal dissipation and that downstream components can tolerate the identical clamping voltage (45.4 V). No changes to schematic polarity or placement are needed, but system-level surge testing must be repeated to confirm robustness with the higher-energy capability of SMB10J28AHE3_A/H.
SMB10J28AHE3_A/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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J28AHE3_A/H FAQ
1.How can I place an order for SMB10J28AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHE3_A/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 SMB10J28AHE3_A/H reliable?
The price and inventory of SMB10J28AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB10J28AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHE3_A/H?
SMB10J28AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHE3_A/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 SMB10J28AHE3_A/H?
For technical support, including SMB10J28AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHE3_A/H requirements.
6.How does Aetrix verify that SMB10J28AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHE3_A/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 SMB10J28AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB10J28AHE3_A/H?
All SMB10J28AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHE3_A/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 SMB10J28AHE3_A/H part is unused and in its original packaging.
Return procedure for SMB10J28AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHE3_A/H Tags
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