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Vishay General Semiconductor - Diodes Division SMBJ15-E3/52
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- Part No.:
- SMBJ15-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15-E3/52.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,792
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Product details
Overview
SMBJ15-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 15 V standoff voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤24.4 V at 24.6 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ15-E3/52 datasheet, SMBJ15-E3/52 pinout, SMBJ15-E3/52 application, or SMBJ15-E3/52 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and validated alternatives for ESD and lightning-induced transient suppression in DC power interfaces.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low dynamic impedance. Its 600 W peak pulse power rating (10/1000 µs) and 5.0 W steady-state power dissipation are defined with 0.2" × 0.2" copper pads per terminal, and it supports operation across –55 °C to +150 °C junction temperature range.
The device exhibits 0.088 %/°C temperature coefficient of VBR, ensuring stable breakdown voltage over temperature, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected circuitry. |
| VBR (min/max) | 16.7 V / 18.5 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage during 600 W transient; determines maximum stress imposed on downstream ICs or MOSFETs. |
| IPPM | 24.6 A - Peak surge current capability under standardized 10/1000 µs waveform; validates immunity to IEC 61000-4-5 Level 3 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on recommended PCB pad layout; critical for thermal design in enclosed enclosures. |
| TJ max | +150 °C - Absolute maximum junction temperature; sets upper limit for ambient + power dissipation + trace heating calculations. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. 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 | Current entry point in forward conduction mode | Connected to ground or lower-potential rail in unidirectional TVS configuration; enables clamping when cathode-side voltage exceeds VBR. |
| Cathode | Current exit point in forward conduction; marked with band | Connected to protected line (e.g., 12 V supply or CAN_H); reverse-biased during normal operation, avalanches during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge handling for IEC 61000-4-5 Level 3 (1 kV/2 kV line-earth) without degradation under repetitive duty cycle ≤0.01 %. |
| Low incremental surge resistance | Enables tight clamping (VC − VBR ≈ 7.7 V) to minimize voltage overshoot on protected nodes during fast transients. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking, reducing manufacturing complexity. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU with lead-free matte tin terminations; suitable for consumer, industrial, and telecom applications. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 12 V power input against load dump and inductive switching spikes from relay coils and solenoids. IC Role / Device Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤24.4 V, preventing latch-up or gate oxide damage in buck controller ICs rated for 36 V absolute max. |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from ESD and alternator ripple coupling. IC Role / Device Role: Point-of-load TVS on 12 V supply line feeding BCM microcontroller and sensor interface ICs. Use Value: Sub-ns response ensures clamping before ESD pulse (IEC 61000-4-2 ±8 kV contact) reaches sensitive CMOS inputs. |
| Telecom Power Feeds | Consumer Power Adapters |
Use Scenario: Input-stage surge protection on 48 V PoE-powered equipment front-end rectifiers and DC-DC stages. IC Role / Device Role: Primary overvoltage clamp on secondary-side 48 V distribution rail prior to isolation barrier. Use Value: 600 W rating withstands multiple 10/1000 µs surges per IEC 61000-4-5, maintaining reliability in outdoor telecom cabinets. |
Use Scenario: Secondary-side output rail protection in USB-C PD adapters against output short-circuit transients and hot-plug events. IC Role / Device Role: Clamp on 5–20 V output bus to safeguard connected devices during fault recovery. Use Value: 15 V VWM aligns with USB PD 3.0 variable output; 24.4 V VC stays below USB-C VBUS absolute max (28 V). |
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-E3/52 | Same electrical specs and package; identical marking code "BM" per datasheet Table 1; E3/52 denotes same tape-and-reel packaging. | No functional difference; alternate part number format used interchangeably by Vishay for same device. | Select SMBJ15A-E3/52 only if BOM requires explicit "A" suffix per internal naming convention; electrically identical to SMBJ15-E3/52. |
| P6SMB15A | Same SMB package, 15 V VWM, but 600 W rating tested at 1.5x longer pulse width (10/1000 µs vs. P6SMB's 10/1000 µs); VC = 24.4 V matches exactly. | Approved for UL 497B and CSA C22.2 No. 132; preferred where regulatory certification documentation is mandatory for end-equipment safety listing. | Choose P6SMB15A when UL/CSA recognition is required; otherwise SMBJ15-E3/52 offers identical surge performance with broader commercial availability. |
Compared with SMBJ15A-E3/52 (identical device) and P6SMB15A (certified variant), SMBJ15-E3/52 provides optimal cost-performance balance for non-certification-driven industrial and consumer designs, with identical clamping and thermal behavior but streamlined commercial-grade qualification.
Availability
SMBJ15-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer power adapters requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for SMBJ15-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-volume manufacturability.
The SMBJ series is engineered for surface-mount transient suppression in DC power and signal lines, targeting automotive, industrial, and telecom systems where compact size, high surge robustness, and MSL-1 reflow compatibility are essential.
FAQ
What is the standoff voltage (VWM) of the SMBJ15-E3/52?
The SMBJ15-E3/52 has a maximum reverse standoff voltage (VWM) of 15 V, meaning it remains in high-impedance blocking state up to this DC or RMS voltage level. This value ensures compatibility with 12 V nominal systems while providing sufficient margin above operating voltage to avoid leakage-related power loss or false triggering during normal operation. The SMBJ15-E3/52 maintains <1.0 µA reverse leakage at 15 V, per datasheet specification.
Does the SMBJ15-E3/52 meet automotive qualification standards?
The SMBJ15-E3/52 is RoHS-compliant and rated for commercial temperature range (–55 °C to +150 °C), but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, Vishay offers the SMBJ15HE3 variant (with HE3 suffix), which shares identical electrical characteristics but undergoes additional stress testing per AEC-Q101. The SMBJ15-E3/52 remains suitable for non-safety-critical automotive subsystems where full qualification is not mandated.
What is the clamping voltage (VC) of the SMBJ15-E3/52 under surge conditions?
The SMBJ15-E3/52 clamps to a maximum of 24.4 V when subjected to its rated 24.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This clamping voltage defines the upper voltage limit imposed on protected circuitry during transient events and is measured at the device terminals with specified PCB pad layout (0.2" × 0.2" copper). The SMBJ15-E3/52 achieves this with low dynamic impedance, minimizing energy transfer to downstream components.
Can the SMBJ15-E3/52 be used in bidirectional configurations?
No - the SMBJ15-E3/52 is a unidirectional TVS diode, indicated by the absence of "CA" suffix and presence of cathode band marking. Bidirectional operation requires part numbers ending in "CA", such as SMBJ15CA-E3/52. Using SMBJ15-E3/52 in reverse-biased AC signal paths would result in forward conduction and potential failure. Always verify polarity alignment: cathode connects to the line being protected, anode to ground or reference rail.
What is the thermal resistance (RθJA) of the SMBJ15-E3/52?
The SMBJ15-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes still-air conditions and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures. Derating begins above 25 °C ambient, per Figure 2 in the Vishay datasheet 88392; the SMBJ15-E3/52 must not exceed 150 °C junction temperature under worst-case operating conditions.
SMBJ15-E3/52 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):
- 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-E3/52 FAQ
1.How can I place an order for SMBJ15-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15-E3/52 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 SMBJ15-E3/52 reliable?
The price and inventory of SMBJ15-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ15-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15-E3/52?
SMBJ15-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15-E3/52 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 SMBJ15-E3/52?
For technical support, including SMBJ15-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15-E3/52 requirements.
6.How does Aetrix verify that SMBJ15-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ15-E3/52 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 SMBJ15-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ15-E3/52?
All SMBJ15-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15-E3/52, 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 SMBJ15-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ15-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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