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Vishay General Semiconductor - Diodes Division SMBJ30AHM3_B/H
- Part No.:
- SMBJ30AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHM3_B/H.pdf
- Description:
- 600W,30V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,149
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Product details
Overview
SMBJ30AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ30AHM3_B/H datasheet, SMBJ30AHM3_B/H pinout, SMBJ30AHM3_B/H application, or SMBJ30AHM3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to limit transient overvoltages before they damage downstream ICs or MOSFETs. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ns), while the low incremental surge resistance enables effective energy diversion during ESD or lightning-induced surges.
The SMBJ30AHM3_B/H is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD22-B102. Its MSL Level 1 rating (peak reflow 260 °C) confirms suitability for standard lead-free assembly processes without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at IT = 1 mA - Voltage at which avalanche conduction initiates; ensures reliable triggering during transients above system rail. |
| VC (Clamping Voltage) | 48.4 V at IPPM = 12.4 A - Maximum voltage seen by protected circuit during 600 W transient; critical for ensuring downstream ICs remain within absolute max ratings. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Energy-handling capability under standardized surge condition; validates protection against IEC 61000-4-5 Level 3/4 surges. |
| RθJA (Junction-to-Ambient) | 100 °C/W - Thermal resistance with recommended 0.2" × 0.2" copper pads; determines allowable power dissipation in natural convection environments. |
| TJmax | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial enclosures. |
| Leakage Current (ID) | <1.0 µA at VWM - Minimal standby power loss and signal integrity impact on low-power sensor or communication lines. |
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); terminals are matte tin-plated for solderability and whisker resistance (JESD201 Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential node in unidirectional configuration; enables clamping when cathode-side voltage exceeds VBR. |
| Cathode | Current exit terminal; marked with band | Connected to protected line (e.g., 30 V rail or CAN bus); avalanche conduction occurs when cathode voltage rises >VBR above anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated protection against high-energy transients such as inductive switch-off spikes in 24 V automotive loads or industrial solenoids. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
| Halogen-free, RoHS-compliant | Meets environmental compliance mandates for global OEMs and industrial equipment; no brominated flame retardants in molding compound (UL 94 V-0 rated). |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision and reducing stress on downstream MOSFET gate oxides or MCU I/O pins. |
| MSL Level 1, 260 °C peak reflow | Eliminates need for moisture sensitivity handling or baking prior to SMT assembly - reduces manufacturing cost and process complexity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 30 V supply rail in engine control unit (ECU) against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC/DC converter input to clamp surges up to 60 V. Use Value: Limits clamped voltage to 48.4 V, keeping downstream buck regulator within its 60 V absolute maximum rating while surviving 100 A surge events. |
Use Scenario: Shielding analog output line of pressure sensor in factory automation PLC module from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected between signal line and ground, with <1.0 µA leakage preserving 16-bit ADC accuracy. Use Value: Sub-ns response ensures clamping before ESD pulse couples into op-amp input stage, preventing latch-up or parametric drift. |
| Telecom DC Power Input Protection | MOSFET Gate Driver Protection |
|
Use Scenario: Safeguarding −48 V telecom rectifier output against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Unidirectional SMBJ30AHM3_B/H oriented cathode-to-line to clamp positive transients only. Use Value: 600 W rating handles multi-kA induced surges per IEC 61000-4-5; halogen-free construction meets telco fire safety standards. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by microcontroller PWM outputs. IC Role / Device Role / Timing Role: TVS placed between gate and source to absorb Miller-induced voltage spikes during switching transitions. Use Value: Low clamping voltage (48.4 V) ensures gate-source voltage stays below 50 V rating even during 12.4 A transient currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses standard SnPb-free plating without halogen-free molding compound. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ30AHE3_B/H for cost-sensitive non-automotive applications requiring identical clamping performance without halogen-free or automotive validation. |
| SMAJ30A-M3 | Lower 400 W peak pulse power (vs. 600 W), SMA package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VC ratings. | Reduced surge energy handling; limited to lower-duty-cycle transients or space-constrained PCBs where thermal margin allows. | Choose SMAJ30A-M3 only when board area is critical and surge threat level is ≤400 W; verify thermal derating at elevated ambient temperatures. |
Compared with SMBJ30AHE3_B/H, the SMBJ30AHM3_B/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ30A-M3, it delivers 50 % higher surge power handling and superior thermal management in the same mounting footprint class.
Availability
SMBJ30AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC input hardening requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ30AHM3_B/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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure tolerance, thermal stability, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ30AHM3_B/H at its rated peak pulse current?
The SMBJ30AHM3_B/H has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe voltage limits during surge events. The SMBJ30AHM3_B/H maintains this clamping performance across its full operating temperature range (−55 to +150 °C).
Is SMBJ30AHM3_B/H qualified for automotive applications?
Yes, SMBJ30AHM3_B/H is AEC-Q101 qualified, as indicated by the "HM3" suffix - denoting halogen-free, RoHS-compliant construction with full automotive reliability testing. It is approved for use in engine control units, body electronics, and ADAS subsystems where sustained operation at 150 °C junction temperature and resistance to thermal cycling are required. The SMBJ30AHM3_B/H data sheet explicitly references AEC-Q101 compliance in the ordering information table.
What does the "_B/H" suffix mean in SMBJ30AHM3_B/H?
The "_B/H" suffix in SMBJ30AHM3_B/H specifies packaging and reel configuration: "B" denotes tape-and-reel format per EIA-481, and "H" indicates a 7-inch diameter reel containing 750 units. This matches Vishay's preferred package code "H" in the ordering table (Document 88392, page 3). The SMBJ30AHM3_B/H is supplied in this exact configuration, enabling direct integration into high-speed SMT pick-and-place systems.
How does SMBJ30AHM3_B/H differ from SMBJ30A-M3?
SMBJ30AHM3_B/H and SMBJ30A-M3 share identical electrical specifications (VWM = 30 V, VC = 48.4 V, PPPM = 600 W) and SMB package, but differ in qualification and material content: SMBJ30AHM3_B/H is halogen-free and AEC-Q101 qualified, whereas SMBJ30A-M3 is halogen-free and RoHS-compliant but not automotive-qualified. Both meet JESD201 Class 2 whisker requirements, but only SMBJ30AHM3_B/H carries the "HM3" automotive designation.
What is the maximum reverse leakage current for SMBJ30AHM3_B/H at rated stand-off voltage?
The SMBJ30AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM = 30 V) and TA = 25 °C. This low leakage preserves signal integrity on high-impedance sensor lines and minimizes standby power loss in battery-operated systems. Leakage remains below 5.0 µA up to 80 % of VWM, as confirmed in the electrical characteristics table of Vishay Document 88392.
SMBJ30AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ30AHM3_B/H FAQ
1.How can I place an order for SMBJ30AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHM3_B/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 SMBJ30AHM3_B/H reliable?
The price and inventory of SMBJ30AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ30AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHM3_B/H?
SMBJ30AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHM3_B/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 SMBJ30AHM3_B/H?
For technical support, including SMBJ30AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ30AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHM3_B/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 SMBJ30AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ30AHM3_B/H?
All SMBJ30AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHM3_B/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 SMBJ30AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ30AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHM3_B/H Tags
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