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Vishay General Semiconductor - Diodes Division SMBJ30AHE3/52
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- Part No.:
- SMBJ30AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHE3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,645
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Product details
Overview
SMBJ30AHE3/52 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 DC power rails 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the SMBJ30AHE3/52 datasheet, SMBJ30AHE3/52 pinout, SMBJ30AHE3/52 application, or SMBJ30AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 30 V and rapidly transitions to low-impedance conduction above VBR (min 33.3 V), limiting transient energy to safe levels. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown behavior under repetitive surge stress.
The SMBJ30AHE3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a temperature coefficient of VBR of +0.099 %/°C - enabling predictable performance across -55 °C to +150 °C operating range without thermal runaway risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before significant leakage; defines upper limit of normal operating rail. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above nominal rail. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| IFSM | 100 A - Single half-sine surge current rating; validates robustness against inductive switch-off events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing per JESD47. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or lower-potential node; completes clamping loop during positive transients. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to protected line (e.g., 30 V rail); conducts when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in automotive load-dump and industrial motor switching without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Meets automotive reliability requirements for mission-critical ECUs, ADAS sensors, and infotainment power supplies. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage margin between clamp and breakdown - improves system-level surge immunity headroom. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns or baking requirement. |
| Glass passivated junction | Ensures stable leakage current (<1.0 µA at VWM) and long-term parameter stability under thermal cycling. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 30 V battery-fed control modules from ISO 7637-2 load dump pulses up to 60 V. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input rail and chassis ground. Use Value: Limits transient voltage to ≤48.4 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Shielding 4–20 mA analog sensor outputs from ESD and inductive coupling in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and return lines near connector. Use Value: Sub-1 ns response time and <1.0 µA leakage preserve signal integrity while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered equipment front-end from lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC-DC regulation and isolation. Use Value: 600 W rating handles multi-kA induced surges; AEC-Q101 qualification supports extended field life in outdoor cabinets. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners). IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals, cathode to supply rail. Use Value: 100 A IFSM withstands repeated commutation spikes; SMB package fits tight board space near motor driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHM3/52 | 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 WEEE, specific OEM specs). | Choose SMBJ30AHM3/52 when halogen-free construction is required without compromising surge performance or qualification status. |
| SMAJ30AHE3/A | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; 400 W PPPM, lower IPPM (8.3 A), no AEC-Q101 listing. | Limited to commercial-grade, space-constrained applications where 600 W surge margin and automotive qualification are not needed. | Choose SMAJ30AHE3/A only for cost-sensitive, non-automotive designs with lower surge exposure and tighter board area budgets. |
Compared with SMBJ30AHE3/52, SMBJ30AHM3/52 offers identical protection performance with halogen-free materials, while SMAJ30AHE3/A trades 33 % lower pulse power and missing AEC-Q101 for reduced footprint - making SMBJ30AHE3/52 the optimal choice for automotive and high-reliability industrial use cases.
Availability
SMBJ30AHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and consistent 600 W surge immunity.
Supply support for SMBJ30AHE3/52 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where robustness, consistency, and qualification compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ30AHE3/52 at its rated peak pulse current?
The SMBJ30AHE3/52 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 and guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024), ensuring predictable overvoltage limiting for protected circuits. The SMBJ30AHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ30AHE3/52 qualified for automotive applications?
Yes, SMBJ30AHE3/52 is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's official datasheet. It undergoes stress testing for high-temperature operating life, temperature cycling, humidity, and ESD per JESD47, making it suitable for engine control units, body electronics, and ADAS modules. The SMBJ30AHE3/52 meets automotive reliability requirements without derating in standard mounting conditions.
What is the maximum reverse leakage current for SMBJ30AHE3/52 at its stand-off voltage?
The SMBJ30AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 30 V and TA = 25 °C. This low leakage preserves power efficiency in always-on systems and avoids false triggering in high-impedance sensing circuits. The SMBJ30AHE3/52 maintains leakage <5.0 µA up to 125 °C per thermal derating curves in the datasheet.
Does SMBJ30AHE3/52 have a bidirectional version?
No - SMBJ30AHE3/52 is strictly unidirectional, indicated by the "A" suffix and cathode band marking. For bidirectional operation at the same voltage level, the equivalent part is SMBJ30CAHE3/52 (VWM = 30 V, symmetrical clamping in both polarities). The SMBJ30AHE3/52 must be oriented with cathode toward the protected line; reverse installation prevents proper clamping function.
What is the thermal resistance from junction to ambient for SMBJ30AHE3/52?
The SMBJ30AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB layout and natural convection cooling. The SMBJ30AHE3/52's RθJL is 20 °C/W, supporting effective heat transfer to PCB traces or local copper pours in thermally demanding applications.
SMBJ30AHE3/52 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)
SMBJ30AHE3/52 FAQ
1.How can I place an order for SMBJ30AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHE3/52 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 SMBJ30AHE3/52 reliable?
The price and inventory of SMBJ30AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHE3/52?
SMBJ30AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHE3/52 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 SMBJ30AHE3/52?
For technical support, including SMBJ30AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHE3/52 requirements.
6.How does Aetrix verify that SMBJ30AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHE3/52 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 SMBJ30AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30AHE3/52?
All SMBJ30AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHE3/52, 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 SMBJ30AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ30AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHE3/52 Tags
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