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Vishay General Semiconductor - Diodes Division SMBJ30AHM3_B/I
- Part No.:
- SMBJ30AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHM3_B/I.pdf
- Description:
- 600W,30V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,140
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Product details
Overview
SMBJ30AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ30AHM3_B/I datasheet, SMBJ30AHM3_B/I pinout, SMBJ30AHM3_B/I application, or SMBJ30AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a fast-acting shunt protector with glass-passivated junction and low incremental surge resistance. Its response time is sub-nanosecond, enabling suppression of ESD and lightning-induced transients before sensitive downstream components are damaged.
The device is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at 1 mA - Voltage at which device enters avalanche conduction; ensures reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 48.4 V at 12.4 A IPPM - Maximum voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability under standardized 10/1000 µs waveform; critical for automotive load-dump immunity. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Low leakage preserves system efficiency and avoids false triggering in high-impedance circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments without derating at ambient ≤ 85 °C. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop when transient exceeds VBR. |
| Cathode | High-side connection point | Connected to protected line (e.g., 30 V rail); band marking identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation over 1000+ events. |
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units and body electronics where reliability under thermal cycling is mandatory. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance; suitable for green manufacturing and export compliance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; eliminates production delays and moisture-related delamination risk. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, reducing stress on 3.3 V or 5 V logic interfaces downstream of protection stage. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 30 V supply rails in automotive body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 120 V load dump spikes to ≤48.4 V within <1 ns, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry TVS on 4–20 mA current loop or 0–10 V analog output traces. Use Value: Limits induced surges from nearby motor switching to <48.4 V, preserving ADC reference integrity and sensor calibration stability. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Shielding PoE-powered equipment inputs from Ethernet cable ESD and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary common-mode choke, across DC input terminals. Use Value: Absorbs 600 W transient energy without failure, maintaining uptime in outdoor telecom cabinets exposed to lightning-prone environments. |
Use Scenario: Securing 30 V output of wall-mounted AC/DC adapters used in smart home hubs and security cameras. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp before connector interface to end-device PCB. Use Value: Prevents field failures due to accidental short-circuit recovery transients or capacitor discharge spikes into connected devices. |
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/I | Same electrical specs but RoHS-compliant (non-halogen-free) variant; no halogen-free certification. | Acceptable for commercial-grade industrial designs where halogen-free material compliance is not mandated. | Select SMBJ30AHE3_B/I if halogen-free requirement is waived and cost optimization is prioritized. |
| SMBJ30AHM3_B/H | Identical electrical and material specs; differs only in packaging-7" tape-and-reel (750 pcs) vs. 13" reel (3200 pcs). | Suitable for low-volume prototyping or small-batch production where smaller reels reduce inventory holding. | Choose SMBJ30AHM3_B/H when matching existing reel size logistics or minimizing initial procurement quantity. |
Compared with SMBJ30AHE3_B/I and SMBJ30AHM3_B/H, the SMBJ30AHM3_B/I offers identical surge protection performance and halogen-free compliance in a high-volume 13" reel format-making it optimal for automotive Tier 1 production ramp and long-term BOM continuity planning.
Availability
SMBJ30AHM3_B/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor systems, and telecom power input stages requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ30AHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMBJ series targets high-energy transient suppression in harsh environments; engineered specifically for AEC-Q101 compliance, low clamping voltage, and repeatable surge endurance in automotive and industrial power systems.
FAQ
What is the clamping voltage of SMBJ30AHM3_B/I at its rated peak pulse current?
The SMBJ30AHM3_B/I has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMBJ30AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ30AHM3_B/I qualified for automotive applications?
Yes, SMBJ30AHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in the ordering information table (page 3) of the Vishay datasheet. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and surge endurance-making SMBJ30AHM3_B/I suitable for under-hood and chassis-mounted automotive ECUs where reliability under thermal and vibration stress is critical.
What does the "HM3" suffix signify in SMBJ30AHM3_B/I?
The "HM3" suffix in SMBJ30AHM3_B/I denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance requirements. It also indicates AEC-Q101 qualification and compatibility with lead-free reflow profiles up to 260 °C peak temperature. This distinguishes SMBJ30AHM3_B/I from non-halogen-free variants like SMBJ30AHE3_B/I and confirms its suitability for green manufacturing and automotive supply chains.
How does SMBJ30AHM3_B/I differ from bidirectional SMBJ30CA variants?
SMBJ30AHM3_B/I is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse voltage is blocked. In contrast, SMBJ30CA is bidirectional, symmetrical in both directions, and used in AC or data-line applications. The SMBJ30AHM3_B/I cannot substitute for SMBJ30CA without circuit redesign, as its anode-cathode asymmetry prevents reverse conduction-critical for protecting single-polarity rails.
What is the thermal resistance of SMBJ30AHM3_B/I from junction to ambient?
The SMBJ30AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value is specified in the Thermal Characteristics table (page 3) and informs thermal design margins-e.g., at 5.0 W steady-state dissipation, junction temperature rise would be ~500 °C above ambient, confirming that SMBJ30AHM3_B/I is intended for transient-only duty, not continuous power dissipation.
SMBJ30AHM3_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):
- 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/I FAQ
1.How can I place an order for SMBJ30AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHM3_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 SMBJ30AHM3_B/I reliable?
The price and inventory of SMBJ30AHM3_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 SMBJ30AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ30AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHM3_B/I?
SMBJ30AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHM3_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 SMBJ30AHM3_B/I?
For technical support, including SMBJ30AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ30AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHM3_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 SMBJ30AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ30AHM3_B/I?
All SMBJ30AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHM3_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 SMBJ30AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ30AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHM3_B/I Tags
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