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Vishay General Semiconductor - Diodes Division SMBJ15-E3/5B
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- Part No.:
- SMBJ15-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,547
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Product details
Overview
SMBJ15-E3/5B 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 sensitive electronics. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ15-E3/5B datasheet, SMBJ15-E3/5B pinout, SMBJ15-E3/5B application, or SMBJ15-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, junction-to-ambient thermal resistance, polarity marking convention, and RoHS-compliant commercial-grade sourcing details - all confirmed from Vishay's official 88392 document revision 09-Jan-2024.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation, it remains high-impedance until transient voltage exceeds VWM (15 V), then avalanches to clamp at ≤24.4 V while conducting up to 24.6 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM), and its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Thermal performance is defined by RθJA = 100 °C/W (typ.) on standard 0.2" × 0.2" copper pads, with junction temperature rated from –55 °C to +150 °C. The cathode band denotes polarity; no marking is used for bidirectional variants - confirming SMBJ15-E3/5B's unidirectional identity per device marking "BM" and ordering suffix "-E3".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse operating voltage before clamping initiates; sets safe margin below system rail voltage. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal 15 V supply. |
| VC (Clamping Voltage) | 24.4 V at 24.6 A (10/1000 µs) - Peak voltage seen by protected circuit during surge; defines worst-case stress level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained for single 10/1000 µs transients; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM (Peak Pulse Current) | 24.6 A - Maximum surge current handled at rated clamping voltage; determines minimum series impedance required. |
| RθJA (Junction-to-Ambient) | 100 °C/W - Thermal resistance on standard PCB pad layout; guides heatsinking and power derating above 25 °C ambient. |
| TJmax | +150 °C - Absolute maximum junction temperature; constrains continuous power dissipation and surge repetition rate. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to ground or lower-potential node; completes clamping path when cathode is tied to protected line. |
| Cathode (banded end) | Protected-line connection point | Directly ties to IC power input or signal line; conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against lightning-induced surges and inductive switching transients in 24 V industrial systems. |
| 24.4 V clamping at 24.6 A | Limits voltage stress on downstream 3.3 V/5 V logic and MOSFET gate drivers during 1 kV/500 A surge events. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at 15 V - critical for low-power sensor and battery-backed circuits. |
| RoHS-compliant, commercial grade (-E3) | Meets EU RoHS Directive 2011/65/EU; suitable for non-automotive applications requiring environmental compliance and cost efficiency. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC bus against back-EMF spikes from relay coil de-energization and H-bridge shoot-through. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bus input to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits bus voltage excursion to ≤24.4 V during 24.6 A surges, preventing latch-up or gate oxide damage in downstream SiC MOSFET drivers. |
Use Scenario: Safeguarding LIN bus transceivers and door module MCUs from load dump and jump-start induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail, triggered only during >15 V overvoltage events to avoid false triggering during cranking. Use Value: Maintains <1.0 µA leakage at 15 V, preserving sleep-mode current budget while clamping 12 V rail to 24.4 V during 100 V/50 ms load dump. |
| Consumer Power Adapters | Telecom PoE Injectors |
|
Use Scenario: Secondary-side output protection in 5 V/9 V USB-C PD adapters exposed to ESD and hot-plug transients. IC Role / Device Role / Timing Role: Fast-response clamping diode between VOUT and GND, activated within picoseconds of overvoltage onset. Use Value: Achieves <1 ns response time and 24.4 V clamping, ensuring USB PD controller ICs survive ±8 kV contact ESD per IEC 61000-4-2. |
Use Scenario: Data line protection on IEEE 802.3af/at PoE injectors where DC bias and Ethernet signals coexist. IC Role / Device Role / Timing Role: Unidirectional TVS on spare pairs carrying 48 V phantom power, referenced to local ground. Use Value: Withstands continuous 48 V bias while clamping induced surges to 24.4 V - well below PHY IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-E3/5B | Same electrical specs and package; identical marking "BM", same RoHS-compliant -E3 suffix and 3200-reel packaging. | No functional difference; alternate part number format used interchangeably by Vishay for same device. | Select SMBJ15A-E3/5B only if BOM or procurement system requires explicit "A" suffix for unidirectional designation. |
| P6SMB15A | Same SMB package and 15 V VWM, but lower 600 W PPPM rating achieved at 1.5x higher VC (26.5 V vs. 24.4 V); 10% wider VBR tolerance (16.7–18.5 V vs. 16.7–19.0 V). | Less effective clamping margin for 3.3 V logic interfaces; requires larger series impedance to meet same surge current handling. | Choose only if legacy design uses P6SMB15A footprint and board-level testing confirms 26.5 V clamping is acceptable. |
Compared with SMBJ15-E3/5B, SMBJ15A-E3/5B is functionally identical and interchangeable, whereas P6SMB15A offers reduced clamping performance and looser VBR control - making SMBJ15-E3/5B preferable for new designs demanding tight voltage margins and AEC-Q101-ready reliability.
Availability
SMBJ15-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, RoHS compliance, and repeatable surge immunity performance.
Supply support for SMBJ15-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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial automation, automotive subsystems, and telecom infrastructure where consistent clamping and thermal stability are critical.
FAQ
What is the clamping voltage of SMBJ15-E3/5B at its rated peak pulse current?
The SMBJ15-E3/5B has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - a key parameter for verifying compatibility with downstream IC absolute maximum ratings. The SMBJ15-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ15-E3/5B suitable for automotive applications?
SMBJ15-E3/5B is RoHS-compliant and qualified to commercial-grade specifications, but it is not AEC-Q101 certified. For automotive use, Vishay offers the AEC-Q101-qualified variant SMBJ15HE3_B/I (with HE3 suffix), which shares identical electrical characteristics but undergoes additional stress testing. The SMBJ15-E3/5B may be used in non-safety-critical automotive subsystems only after full system-level validation - however, the SMBJ15-E3/5B itself does not carry automotive qualification.
How does the SMBJ15-E3/5B differ from bidirectional TVS diodes like SMBJ15CA?
The SMBJ15-E3/5B is unidirectional and features a cathode band for polarity identification, while SMBJ15CA is bidirectional with no polarity marking and symmetrical clamping in both directions. Electrically, SMBJ15-E3/5B blocks forward current above ~0.7 V and clamps only in reverse; SMBJ15CA clamps identically for positive and negative transients. This makes SMBJ15-E3/5B appropriate for DC rail protection, whereas SMBJ15CA suits AC-coupled or differential signal lines - a fundamental functional distinction confirmed in Vishay's 88392 datasheet.
What is the thermal resistance and how does it affect SMBJ15-E3/5B's surge capability?
The SMBJ15-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. This value directly governs power derating: above 25 °C ambient, its 5.0 W steady-state power dissipation must be reduced linearly (per Fig. 2 in datasheet 88392), and repetitive surge duty cycles must be limited to maintain TJ ≤ 150 °C. The SMBJ15-E3/5B's thermal design enables reliable operation in enclosed industrial enclosures up to 85 °C ambient when PCB layout adheres to recommended pad dimensions.
Can SMBJ15-E3/5B replace SMAJ15A in an existing design?
No - SMBJ15-E3/5B and SMAJ15A are not drop-in replacements. Although both are 15 V unidirectional TVS diodes, SMAJ15A uses the smaller SMA (DO-214AC) package (2.54 mm lead spacing), while SMBJ15-E3/5B uses SMB (DO-214AA) with 4.32 mm lead spacing and higher 600 W power rating. Substituting SMBJ15-E3/5B would require PCB pad redesign and may alter thermal coupling. The SMBJ15-E3/5B is physically incompatible with SMA footprints, and its higher surge rating does not compensate for mechanical mismatch.
SMBJ15-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 22.3A
- 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)
SMBJ15-E3/5B FAQ
1.How can I place an order for SMBJ15-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15-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 SMBJ15-E3/5B reliable?
The price and inventory of SMBJ15-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 SMBJ15-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ15-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15-E3/5B?
SMBJ15-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15-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 SMBJ15-E3/5B?
For technical support, including SMBJ15-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15-E3/5B requirements.
6.How does Aetrix verify that SMBJ15-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ15-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 SMBJ15-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ15-E3/5B?
All SMBJ15-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15-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 SMBJ15-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ15-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15-E3/5B Tags
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