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Vishay General Semiconductor - Diodes Division SMBJ30CHE3/52
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- Part No.:
- SMBJ30CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CHE3/52.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,201
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Product details
Overview
SMBJ30CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. 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).
For engineers reviewing the SMBJ30CHE3/52 datasheet, SMBJ30CHE3/52 pinout, SMBJ30CHE3/52 application, or SMBJ30CHE3/52 equivalent, this device is selected for robust overvoltage protection in automotive-grade power rails, industrial sensor interfaces, and DC input stages where AEC-Q101 qualification, low clamping ratio, and stable thermal performance up to 150 °C junction temperature are required.
Technical Context
The SMBJ30CHE3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient energy before it reaches downstream ICs or MOSFETs. Its clamping behavior is defined by a well-controlled V-I curve with 0.099 %/°C temperature coefficient of VBR.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it meets MSL Level 1 per J-STD-020, supports reflow up to 260 °C peak, and is rated for repetitive surge duty cycle ≤0.01 %. The cathode band marking identifies polarity, critical for correct orientation in DC-biased protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC bias margin. |
| VBR min/max | 33.3 V / 36.8 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamping voltage under 10/1000 µs surge; limits stress on protected circuitry to safe levels. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - Maximum junction temperature rating supports operation in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard pad layout; informs derating above 25 °C. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units and body electronics. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential node; completes conduction path during reverse-biased surge events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); blocks normal operation but avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive systems. |
| AEC-Q101 qualified (HE3 suffix) | Validated reliability for automotive powertrain and chassis modules requiring extended temperature and lifetime validation. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| MSL Level 1, 260 °C reflow compatible | Supports high-volume automated SMT assembly without moisture-related popcorning or solder joint defects. |
| Glass-passivated junction | Ensures stable leakage and breakdown characteristics across humidity, temperature, and long-term aging conditions. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges before they reach regulator ICs. Use Value: Withstands 600 W pulses and maintains clamping below 49 V, preventing overvoltage shutdown or damage to 36 V-rated regulators. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt transients away from precision op-amps and ADC front-ends. Use Value: Sub-1 ns response and <1 µA leakage at 30 V ensure signal integrity remains uncompromised during normal operation. |
| Telecom DC Input Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges on Ethernet cabling and auxiliary DC feeds. IC Role / Device Role / Timing Role: Unidirectional TVS on +48 V DC input rail, coordinated with upstream fuse and common-mode chokes. Use Value: 48.4 V clamping aligns with 57 V absolute maximum ratings of PoE interface controllers, enabling robust Class 4 compliance. |
Use Scenario: Preventing surge propagation from wall adapters into USB-C PD controller ICs and Type-C port protection circuits. IC Role / Device Role / Timing Role: TVS placed immediately after secondary-side rectifier to absorb flyback spikes and external ESD. Use Value: RoHS-compliant HE3 construction and 150 °C TJ rating support compact, thermally constrained adapter designs. |
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 code (no "C" in part number denotes unidirectional variant - identical to SMBJ30CHE3/52). | No functional difference; used interchangeably in same automotive and industrial designs. | Select SMBJ30AHE3/52 if legacy BOM references non-C-suffixed naming convention; electrically identical to SMBJ30CHE3/52. |
| SMAJ30AHE3/A | Lower PPPM (400 W vs. 600 W); SMA package (DO-214AC) with smaller footprint and higher RθJA (140 °C/W). | Suitable for space-constrained consumer applications with lower surge threat levels; not recommended for automotive load dump. | Choose SMAJ30AHE3/A only when board area is critical and surge energy is limited to IEC 61000-4-2 Level 4 (not Level 4+). |
Compared with SMBJ30AHE3/52 (identical function) and SMAJ30AHE3/A (reduced power/space trade-off), the SMBJ30CHE3/52 delivers optimal balance of automotive-grade reliability, 600 W surge capacity, and SMB package manufacturability for mid-to-high threat environments.
Availability
SMBJ30CHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer adapter designs requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ30CHE3/52 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 validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where consistent clamping, thermal stability, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of SMBJ30CHE3/52 under a 10/1000 µs surge?
The SMBJ30CHE3/52 has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream components such as DC-DC controllers and microcontrollers.
Is SMBJ30CHE3/52 qualified for automotive applications?
Yes, SMBJ30CHE3/52 is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - validating its use in engine control units, body control modules, and other automotive subsystems operating from −40 °C to +125 °C ambient.
What does the "C" in SMBJ30CHE3/52 signify?
The "C" in SMBJ30CHE3/52 is a legacy designation retained in Vishay's ordering nomenclature for unidirectional variants within the SMBJ family. It carries no functional distinction from SMBJ30AHE3/52 - both share identical electrical specifications, AEC-Q101 qualification, SMB package, and thermal ratings. The "C" reflects internal manufacturing lineage, not a performance or configuration difference.
Can SMBJ30CHE3/52 be used in bidirectional signal line protection?
No - SMBJ30CHE3/52 is strictly unidirectional and must be oriented with cathode toward the protected line. For bidirectional protection (e.g., RS-485, CAN bus), Vishay specifies the "CA" suffix (e.g., SMBJ30CA). Using SMBJ30CHE3/52 on AC-coupled or symmetric signal lines risks forward conduction during normal operation and failure to suppress negative-going transients.
What is the thermal resistance and how does it affect SMBJ30CHE3/52 layout?
The SMBJ30CHE3/52 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. To maintain safe operation at elevated ambient temperatures, PCB layout must provide adequate copper area and avoid thermal isolation; derating curves in Figure 2 of the datasheet require current reduction above 25 °C ambient.
SMBJ30CHE3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ30CHE3/52 FAQ
1.How can I place an order for SMBJ30CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CHE3/52 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 SMBJ30CHE3/52 reliable?
The price and inventory of SMBJ30CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CHE3/52?
SMBJ30CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CHE3/52 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 SMBJ30CHE3/52?
For technical support, including SMBJ30CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CHE3/52 requirements.
6.How does Aetrix verify that SMBJ30CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30CHE3/52 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 SMBJ30CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30CHE3/52?
All SMBJ30CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CHE3/52, 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 SMBJ30CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ30CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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