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Vishay General Semiconductor - Diodes Division SMBJ30HE3/52
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- Part No.:
- SMBJ30HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30HE3/52.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,925
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Product details
Overview
SMBJ30HE3/52 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 ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMBJ30HE3/52 datasheet, SMBJ30HE3/52 pinout, SMBJ30HE3/52 application, or SMBJ30HE3/52 equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and lightning surge protection design.
Technical Context
The SMBJ30HE3/52 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ps), while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature under defined PCB pad layout.
It complies with ANSI/IEEE C62.35 for transient suppressor characterization and meets UL 497B recognition (QVGQ2). The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - validating suitability for automotive power electronics where reliability under thermal cycling and mechanical shock is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - maximum continuous reverse operating voltage before conduction begins; sets minimum system rail margin for reliable non-triggering during normal operation. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at 1 mA - guaranteed avalanche onset range; defines precise overvoltage trip point for predictable clamping initiation. |
| VC (Clamping Voltage) | 48.4 V at 12.4 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; determines safe voltage headroom for downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorption capability per pulse; enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground). |
| IPPM (Peak Pulse Current) | 12.4 A - peak surge current handled at rated clamping voltage; directly correlates with PCB trace width and grounding path design requirements. |
| TJmax | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments without derating below 125 °C ambient. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad footprint; compatible with automated SMT placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on body end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (cathode-banded end is output/load side) | Connected to protected line (e.g., 30 V supply rail); conducts surge current toward ground when VAK > VBR. |
| Cathode | Output/Load or ground reference side | Connected to system ground or low-impedance return path; establishes polarity-specific clamping direction for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing - enables use in engine control, ADAS, and infotainment power stages. |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV line-to-ground without degradation - eliminates need for external series impedance in many 24 V/30 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during transients - preserves safe operating area for 3.3 V/5 V logic interfaces downstream of protected 30 V rail. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorning - reduces manufacturing yield risk and eliminates bake requirements. |
| 100 A IFSM (8.3 ms half-sine) | Withstands repetitive motor-switching or relay-coil turn-off surges in industrial controls without parametric shift or failure. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects 30 V supply input of BCM microcontroller and CAN transceiver from load-dump transients (ISO 16750-2) and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 30 V rail and local decoupling capacitor, clamping within 1 ps to limit voltage excursion to ≤48.4 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V MCU I/O and 5 V CAN PHY, enabling compliance with OEM EMC specifications without additional filtering. |
Use Scenario: Shields 24 V digital input channel (optocoupler front-end) from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS installed across input terminals upstream of series current-limiting resistor and opto-LED. Use Value: Maintains <1 µA leakage at 30 V to avoid false triggering, while clamping 1 kV/0.5 A surges to <48.4 V to preserve optocoupler CTR and lifetime. |
| Telecom Remote Radio Unit (RRU) Power Interface | Medical Infusion Pump Motor Driver |
|
Use Scenario: Guards 30 V DC-DC converter input in outdoor RRU against lightning-induced surges on PoE-derived or solar-charged supply lines. IC Role / Device Role / Timing Role: Primary surge suppression device located at board edge, coordinated with upstream fuse and downstream π-filter. Use Value: Absorbs 600 W transient energy without failure, ensuring uninterrupted operation during Category B/C lightning events per IEC 61000-4-5 Ed.3. |
Use Scenario: Safeguards H-bridge gate driver ICs from back-EMF spikes generated by brushed DC motor commutation in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Unidirectional TVS connected across motor terminals, referenced to local ground plane with minimal loop inductance. Use Value: Limits flyback voltage to 48.4 V, preventing gate-source overvoltage on 60 V-rated MOSFETs and eliminating need for active snubbing circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3/52 | Same electrical specs and AEC-Q101 qualification; differs only in packaging configuration (tape/reel quantity and orientation code). | No functional difference; identical board-level behavior and reliability profile. | Select based on production line tape-feed compatibility and reel size preference - no design or validation impact. |
| SMCJ30AHE3/52 | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM and lower Rsurge. | Better suited for higher-energy surges (e.g., 6 kV IEC 61000-4-5) but requires 30% more PCB area and different pad layout. | Choose SMCJ30AHE3/52 only if system-level surge testing exceeds 4 kV; otherwise SMBJ30HE3/52 provides optimal space/performance balance. |
Compared with SMBJ30AHE3/52, SMBJ30HE3/52 offers identical protection performance in the same qualified grade, while SMCJ30AHE3/52 delivers higher surge capacity at the cost of increased footprint - making SMBJ30HE3/52 the preferred choice for space-constrained automotive and industrial modules requiring AEC-Q101 compliance.
Availability
SMBJ30HE3/52 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC input protection, telecom remote radio units, and medical motor drive systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ30HE3/52 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 high-reliability, high-efficiency, and automotive-qualified solutions.
The SMBJ series is engineered for board-level transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ30HE3/52 at its rated peak pulse current?
The SMBJ30HE3/52 has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current with a 10/1000 µs waveform. This value is measured under standard test conditions per ANSI/IEEE C62.35 and guarantees the upper voltage limit imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ30HE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ30HE3/52 suitable for automotive applications?
Yes, SMBJ30HE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It undergoes stress testing for temperature cycling, mechanical shock, and humidity resistance per AEC standards, and is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces. The SMBJ30HE3/52 also carries UL 497B recognition (QVGQ2), supporting compliance with OEM-level EMC and safety requirements.
How does the SMBJ30HE3/52 differ from the non-HE3 version (e.g., SMBJ30A-E3/52)?
The SMBJ30HE3/52 includes AEC-Q101 qualification and enhanced process controls beyond the commercial-grade SMBJ30A-E3/52, which is RoHS-compliant but not automotive-qualified. Both share identical electrical parameters (VWM, VBR, VC, PPPM), but only SMBJ30HE3/52 is certified for automotive under-hood and chassis applications. The HE3 suffix also denotes tighter lot-to-lot consistency in leakage and thermal performance - essential for zero-defect manufacturing in Tier 1 supply chains.
What is the maximum operating temperature for SMBJ30HE3/52?
The SMBJ30HE3/52 has a maximum junction temperature (TJmax) of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. Its thermal resistance (RθJA) is 100 °C/W when mounted on 0.2" × 0.2" copper pads, allowing reliable operation in under-hood automotive environments and industrial enclosures up to +125 °C ambient - provided PCB layout adheres to Vishay's recommended pad dimensions and grounding practices.
Does SMBJ30HE3/52 require a heatsink for standard operation?
No, SMBJ30HE3/52 does not require an external heatsink for transient suppression duty cycles. Its 5.0 W steady-state power dissipation (PD) is managed through PCB copper thermal mass, and the 100 °C/W RθJA rating assumes standard 0.2" × 0.2" pads per terminal. Heatsinking is unnecessary because TVS devices operate in pulsed mode - the SMBJ30HE3/52 handles 600 W peaks for microseconds, not continuous power - making it self-limiting and thermally robust in properly laid-out designs.
SMBJ30HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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)
SMBJ30HE3/52 FAQ
1.How can I place an order for SMBJ30HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30HE3/52 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 SMBJ30HE3/52 reliable?
The price and inventory of SMBJ30HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30HE3/52?
SMBJ30HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30HE3/52 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 SMBJ30HE3/52?
For technical support, including SMBJ30HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30HE3/52 requirements.
6.How does Aetrix verify that SMBJ30HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30HE3/52 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 SMBJ30HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30HE3/52?
All SMBJ30HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30HE3/52, 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 SMBJ30HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ30HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30HE3/52 Tags
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