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Vishay General Semiconductor - Diodes Division SMBJ30A-E3/5B
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- Part No.:
- SMBJ30A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30A-E3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
SMBJ30A-E3/5B 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 SMBJ30A-E3/5B datasheet, SMBJ30A-E3/5B pinout, SMBJ30A-E3/5B application, or SMBJ30A-E3/5B equivalent, key selection criteria include clamping performance under 12.4 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity with cathode band marking, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping protection device placed in parallel with sensitive circuit nodes. Its silicon avalanche junction responds within <1 ps to transients exceeding VWM, limiting voltage to ≤48.4 V during a 10/1000 µs surge event while dissipating up to 600 W peak power.
It is rated for continuous operation from –55 °C to +150 °C junction temperature, with 1.0 µA max reverse leakage at 30 V and 0.099 %/°C VBR temperature coefficient. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes - not applicable to the E3/5B variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at 1 mA - Voltage range at which avalanche conduction initiates; ensures reliable turn-on above normal system voltage. |
| VC (Clamping Voltage) | 48.4 V at IPPM = 12.4 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Maximum transient energy absorption capability under standardized 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surges. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Low leakage preserves efficiency in low-power standby circuits and avoids false triggering. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| Polarity | Unidirectional - Cathode marked with band; blocks forward current beyond VF ≈ 3.5 V at 50 A, enabling DC-biased protection. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential rail; completes clamping path during overvoltage events. |
| Cathode | High-side connection point | Marked with band; connected to protected line (e.g., 30 V supply or signal trace); conducts avalanche current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV surge) on 30 V rails without external series impedance. |
| 48.4 V clamping at 12.4 A | Limits transient overvoltage to safe levels for 3.3 V/5 V/12 V logic, microcontrollers, and MOSFET gate drivers. |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures stable VBR and low leakage over time and temperature; improves long-term reliability in industrial environments. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental regulations; suitable for consumer, computing, and telecom applications where AEC-Q101 is not required. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against load dump and inductive switching spikes in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach DC-DC converters and MCU power rails. Use Value: Withstands 600 W surges and clamps to 48.4 V, preventing damage to 36 V-rated input capacitors and enabling use of lower-voltage-rated downstream components. |
Use Scenario: Surge suppression on 12 V battery-fed power line feeding BCM microcontroller and CAN transceivers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 1 (–150 V) and Pulse 3a/b (±100 V) transients on supply rail. Use Value: 30 V VWM provides adequate margin above nominal 12 V, while 48.4 V VC ensures protected ICs remain within absolute maximum ratings during transient events. |
| Telecom PoE Midspan Injector Output | Consumer USB-C Power Delivery Line |
|
Use Scenario: Secondary-side transient protection on 48 V PoE output before Ethernet magnetics and PHY interface. IC Role / Device Role / Timing Role: Fast-response clamping device shunting surge energy away from isolated DC-DC controller and Ethernet PHY. Use Value: Sub-nanosecond response and 600 W rating meet IEEE 802.3bt surge immunity requirements without degrading signal integrity on data lines. |
Use Scenario: Overvoltage safeguard on VBUS line of USB-C receptacle exposed to adapter fault conditions or hot-plug transients. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS limiting VBUS excursions during 20 V PD negotiation or accidental 24 V misconnection. Use Value: 30 V VWM accommodates full USB PD 3.0 range (5–20 V), and 48.4 V VC prevents latch-up or oxide breakdown in USB PD controllers and port switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/5B | Bidirectional version; symmetric VBR (33.3–36.8 V) in both polarities; no polarity marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where reverse polarity transients occur. | Select SMBJ30CA-E3/5B only if bidirectional clamping is needed; SMBJ30A-E3/5B is optimal for DC-biased rails with defined ground reference. |
| SMAJ30A-E3/52 | Same VWM/VBR/VC specs but in smaller SMA (DO-214AC) package; RθJA = 140 °C/W; 400 W PPPM rating. | Lower power handling and higher thermal resistance limit use to lower-energy transients or space-constrained designs where 600 W is not required. | Choose SMAJ30A-E3/52 only when board area is critical and surge threat level is ≤400 W; SMBJ30A-E3/5B delivers higher robustness in same footprint family. |
Compared with SMBJ30CA-E3/5B and SMAJ30A-E3/52, SMBJ30A-E3/5B offers superior 600 W surge capacity and lower thermal resistance in the SMB outline, making it preferred for high-reliability 30 V DC power rail protection where unidirectional behavior is sufficient and PCB real estate allows.
Availability
SMBJ30A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom PoE injectors, and consumer USB-C power delivery systems requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ30A-E3/5B 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, precision, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh electrical environments, targeting automotive, industrial, and telecom infrastructure where repeatable clamping performance and JEDEC-compliant packaging are essential.
FAQ
What is the maximum clamping voltage of SMBJ30A-E3/5B under a 10/1000 µs surge?
The SMBJ30A-E3/5B 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 Figure 1 and Table 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is SMBJ30A-E3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No - SMBJ30A-E3/5B carries the commercial-grade E3 suffix and is not AEC-Q101 qualified. For automotive use, select the SMBJ30AHE3_B variant (with HE3 suffix), which is explicitly qualified per AEC-Q101 and listed in the ordering table on page 3 of Vishay document 88392. The SMBJ30A-E3/5B remains appropriate for industrial and consumer applications.
What does the "/5B" suffix indicate in SMBJ30A-E3/5B?
The "/5B" suffix denotes the packaging configuration: 3200 units per 13-inch diameter plastic tape-and-reel. This is specified in the Ordering Information table on page 3 of Vishay document 88392. The "E3" prefix confirms RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability standards.
How does SMBJ30A-E3/5B differ from SMBJ30A-M3/5B?
SMBJ30A-E3/5B uses standard RoHS-compliant materials, while SMBJ30A-M3/5B adds halogen-free molding compound and plating - both meet RoHS, but M3 satisfies stricter environmental mandates (e.g., EU Green Procurement). Electrically and thermally, the two variants are identical; the choice depends solely on material compliance requirements, not performance.
Can SMBJ30A-E3/5B be used to protect a 24 V DC power rail?
Yes - SMBJ30A-E3/5B is well-suited for 24 V DC rail protection. Its 30 V stand-off voltage (VWM) provides 25 % margin above nominal 24 V, and its 48.4 V clamping voltage ensures downstream 50 V-rated capacitors and 40 V-maximum-input DC-DC converters remain within safe operating limits during transients, as validated by Vishay's 600 W pulse rating.
SMBJ30A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ30A-E3/5B FAQ
1.How can I place an order for SMBJ30A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30A-E3/5B 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 SMBJ30A-E3/5B reliable?
The price and inventory of SMBJ30A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ30A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30A-E3/5B?
SMBJ30A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30A-E3/5B 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 SMBJ30A-E3/5B?
For technical support, including SMBJ30A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30A-E3/5B requirements.
6.How does Aetrix verify that SMBJ30A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ30A-E3/5B 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 SMBJ30A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ30A-E3/5B?
All SMBJ30A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30A-E3/5B, 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 SMBJ30A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ30A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30A-E3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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