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Vishay General Semiconductor - Diodes Division SMBJ30AHM3/I
- Part No.:
- SMBJ30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHM3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,724
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Product details
Overview
SMBJ30AHM3/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/I datasheet, SMBJ30AHM3/I pinout, SMBJ30AHM3/I application, or SMBJ30AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), 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, conducting when reverse voltage exceeds VBR to clamp transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling consistent clamping across surge events.
The device is rated for -55 °C to +150 °C operating junction temperature, with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 24 V DC systems. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature triggering. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage level during 10/1000 µs surge; limits stress on protected 3.3 V/5 V logic or 24 V control circuitry. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01 % duty cycle; supports robust protection against IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves efficiency in high-impedance bias networks and battery-powered sensor nodes. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or industrial motor drive environments without derating. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty. |
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). Matte tin-plated leads, MSL Level 1, compatible with lead-free reflow (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Reverse voltage sensing / Surge current sink | Connected to protected line (e.g., 24 V rail or CAN_H); conducts when VAK > VBR to divert surge energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, UHAST, etc.), supporting under-hood and ADAS ECU deployments. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for global OEM supply chains without compromising surge robustness or thermal performance. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from inductive switching (e.g., solenoid drivers, relay coils) without degradation over 10⁴+ events. |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on and VC/VBR ≈ 1.45 enable effective protection of sensitive CMOS inputs and gate drivers. |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage drift over temperature, and long-term reliability in humid or thermally cycling environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power rails feeding H-bridge gate drivers and position sensors in pump/fan controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp load-dump and inductive kickback surges. Use Value: Limits rail voltage to ≤48.4 V during 12.4 A transients, preventing latch-up or oxide damage in 3.3 V microcontrollers and isolated gate drivers. |
Use Scenario: Input protection for LIN bus transceivers and door module window motor drivers exposed to battery disconnection spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBAT-supplied signal paths to absorb ISO 7637-2 Pulse 5a surges up to 100 V. Use Value: Maintains <1.0 µA leakage at 30 V, avoiding battery drain in always-on modules while meeting AEC-Q101 lifetime requirements. |
| Telecom Power Supplies | Industrial Sensor Signal Conditioning |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Fast-clamping TVS on DC output to limit fault propagation during hot-swap or short-circuit recovery events. Use Value: 600 W rating sustains repeated 10/1000 µs surges without parameter shift, ensuring uptime in carrier-grade infrastructure. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loops, RTD bridges) in PLC analog I/O modules. IC Role / Device Role / Timing Role: Low-leakage TVS on signal lines referenced to isolated ground to suppress ESD and field-induced transients. Use Value: 33.3–36.8 V VBR range provides margin above 24 V loop supply while preserving ADC accuracy via minimal leakage error. |
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/I | Same electrical specs, but RoHS-compliant without halogen-free certification (E3 vs HM3); no AEC-Q101 qualification. | Suitable for commercial/industrial use where automotive qualification is not required; lower cost for non-automotive BOMs. | Select when AEC-Q101 and halogen-free compliance are not mandated; verify MSL and reflow profile compatibility. |
| SMAJ30A-M3 | Lower PPPM (400 W), larger VBR tolerance (33.3–41.2 V), SMA package (smaller footprint, higher RθJA = 140 °C/W). | Better suited for space-constrained consumer PCBs with lower surge exposure; not recommended for automotive or industrial 600 W requirements. | Choose only if board area is critical and surge threat level is limited to IEC 61000-4-2 ESD or low-energy transients. |
Compared with SMBJ30AHM3/I, SMBJ30AHE3/I offers identical clamping and leakage but lacks automotive qualification and halogen-free assurance, while SMAJ30A-M3 trades surge robustness and thermal performance for smaller size-making SMBJ30AHM3/I the optimal choice for AEC-Q101–mandated, high-reliability 600 W protection.
Availability
SMBJ30AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ30AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, halogen-free materials, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ30AHM3/I at its rated peak pulse current?
The SMBJ30AHM3/I has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures protected circuits remain below critical voltage thresholds during surge events. The SMBJ30AHM3/I maintains this clamping performance across its specified operating temperature range and after repeated surge exposures, provided layout follows Vishay's recommended 0.2" × 0.2" copper pad guidelines.
Is SMBJ30AHM3/I suitable for automotive applications?
Yes, SMBJ30AHM3/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive applications including body control modules, infotainment power rails, and sensor interfaces. Its -55 °C to +150 °C operating junction temperature range, MSL Level 1 rating, and validated reliability testing meet OEM requirements for under-hood and cabin-mounted electronics.
How does the HM3 suffix differ from E3 or HE3 in SMBJ30A variants?
The HM3 suffix on SMBJ30AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. In contrast, E3 indicates RoHS compliance without halogen-free or automotive qualification, and HE3 adds AEC-Q101 but not halogen-free status. The HM3 variant is specifically intended for automotive Tier 1 suppliers requiring full environmental and reliability compliance in a single part number.
What is the reverse leakage current specification for SMBJ30AHM3/I at its stand-off voltage?
SMBJ30AHM3/I specifies a maximum reverse leakage current (ID) of 1.0 µA at its 30 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage minimizes power loss in battery-backed or high-impedance circuits and remains stable over temperature due to its glass-passivated junction structure. Measured values typically fall well below this limit in production units.
Can SMBJ30AHM3/I be used in bidirectional transient protection applications?
No, SMBJ30AHM3/I is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ30CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities. Using SMBJ30AHM3/I in bidirectional configurations risks failure during positive-going transients on the anode side, as it lacks reverse breakdown capability.
SMBJ30AHM3/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):
- 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/I FAQ
1.How can I place an order for SMBJ30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHM3/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/I reliable?
The price and inventory of SMBJ30AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHM3/I?
SMBJ30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHM3/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/I?
For technical support, including SMBJ30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHM3/I requirements.
6.How does Aetrix verify that SMBJ30AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ30AHM3/I?
All SMBJ30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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