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Vishay General Semiconductor - Diodes Division SMBJ30AHE3/5B
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- Part No.:
- SMBJ30AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHE3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
SMBJ30AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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).
For engineers reviewing the SMBJ30AHE3/5B datasheet, SMBJ30AHE3/5B pinout, SMBJ30AHE3/5B application, or SMBJ30AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B for telecom/sensor protection.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM = 30 V).
Designed for automated SMT assembly, it delivers 600 W surge handling per 10/1000 µs waveform with 0.01 % duty cycle, and exhibits fast response time (<1.0 ns) and low incremental surge resistance - critical for safeguarding MOSFET gates, IC inputs, and sensor interfaces against lightning-induced or inductive-switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 33.3 V / 36.8 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 600 W transient; determines maximum stress imposed on downstream components. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy absorption capability; validates suitability for IEC 61000-4-5 Level 3/4 protection. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in automotive engine compartments and industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or lower-potential rail; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to the line being protected (e.g., 30 V supply rail); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - enables use in ADAS and body control modules. |
| 600 W peak pulse power | Withstands repetitive 10/1000 µs surges up to 600 W at 0.01 % duty cycle - meets IEC 61000-4-5 surge immunity requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across temperature and lifetime - reduces field failure risk. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirement. |
| UL 497B recognized | Approved for telecom and data-line protector classification (QVGQ2, E136766) - simplifies safety certification for communication equipment. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V/30 V supply rails in vehicle ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 30 V. Use Value: Limits voltage excursion to ≤48.4 V during 12.4 A transients, preventing damage to MCU power domains and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Parallel-connected TVS on 4–20 mA loop or 0–10 V output line to absorb induced surges from nearby motor switching. Use Value: Sub-1 ns response and low clamping voltage preserve signal integrity while enabling robust 1 kV/0.5 kA surge immunity per IEC 61000-4-4. |
| Telecom Line Interface Protection | Consumer USB Power Input Protection |
|
Use Scenario: Shielding Ethernet PHY power pins (e.g., 3.3 V, 5 V, 12 V) in PoE-powered switches from lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side DC rails to suppress common-mode transients coupled via transformer windings. Use Value: 30 V VWM aligns with 12 V PoE+ auxiliary rails; 48.4 V VC prevents latch-up in voltage regulators and PHY ICs. |
Use Scenario: Adding overvoltage resilience to USB-C VBUS input stages in portable speakers or docking stations. IC Role / Device Role / Timing Role: Primary clamping device upstream of USB PD controller and buck converter to block 30+ V faults from chargers. Use Value: Low 1.0 µA leakage avoids battery drain; AEC-Q101 qualification ensures reliability in high-volume consumer manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHM3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU medical devices). | Choose SMBJ30AHM3/5B when halogen-free bill-of-materials is required; otherwise SMBJ30AHE3/5B offers standard RoHS compliance. |
| SMAJ30AHE3/A | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM (400 W) and higher RθJA (140 °C/W). | Not suitable for 600 W surge environments; limited to lower-energy transients or space-constrained designs where 400 W suffices. | Select SMAJ30AHE3/A only if board area is critical and surge threat level is ≤400 W; SMBJ30AHE3/5B remains preferred for full 600 W compliance. |
Compared with SMBJ30AHM3/5B, SMBJ30AHE3/5B provides identical protection performance with standard RoHS compliance, while SMAJ30AHE3/A trades 33 % lower surge capacity and reduced thermal performance for 30 % smaller footprint - requiring careful system-level validation of energy handling margins.
Availability
SMBJ30AHE3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom line interface protection requiring stable component supply, AEC-Q101 qualification, and UL 497B recognition.
Supply support for SMBJ30AHE3/5B 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 to deliver high-power, low-leakage transient suppression in compact surface-mount packages for automotive, industrial, and telecom applications demanding AEC-Q101 qualification and UL safety recognition.
FAQ
What is the maximum clamping voltage of SMBJ30AHE3/5B under a 10/1000 µs surge?
The SMBJ30AHE3/5B has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 12.4 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ30AHE3/5B suitable for automotive applications?
Yes, SMBJ30AHE3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD verification per JESD22-A114. Its –55 °C to +150 °C operating junction temperature range and UL 497B recognition make SMBJ30AHE3/5B appropriate for under-hood and body-control module deployments.
What does the "HE3" suffix indicate in SMBJ30AHE3/5B?
The "HE3" suffix in SMBJ30AHE3/5B denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads meeting J-STD-002 solderability standards. The "5B" denotes packaging in 13-inch tape-and-reel format with 3200 units per reel - distinct from "52" (7-inch reel, 750 units) and supporting high-volume SMT assembly.
How does SMBJ30AHE3/5B differ from bidirectional variants like SMBJ30CA?
SMBJ30AHE3/5B is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMBJ30CA is bidirectional, symmetrical in both directions, and used for AC or floating signal lines. Their VBR and VC values differ: SMBJ30CA has higher VBR (≈36–40 V) and is not rated for forward surge current (IFSM = N/A).
What is the thermal resistance of SMBJ30AHE3/5B, and how does it affect layout?
SMBJ30AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal PCB copper; increasing pad area or adding thermal vias lowers effective RθJA. For sustained 5.0 W power dissipation, board layout must ensure adequate copper mass to maintain TJ ≤ 150 °C under worst-case ambient conditions.
SMBJ30AHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ30AHE3/5B FAQ
1.How can I place an order for SMBJ30AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHE3/5B 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 SMBJ30AHE3/5B reliable?
The price and inventory of SMBJ30AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ30AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHE3/5B?
SMBJ30AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHE3/5B 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 SMBJ30AHE3/5B?
For technical support, including SMBJ30AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHE3/5B requirements.
6.How does Aetrix verify that SMBJ30AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHE3/5B 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 SMBJ30AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ30AHE3/5B?
All SMBJ30AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHE3/5B, 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 SMBJ30AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ30AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHE3/5B Tags
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