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Vishay General Semiconductor - Diodes Division SMBG15A-E3/52
- Part No.:
- SMBG15A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG15A-E3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,530
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Product details
Overview
SMBG15A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 24.4 V clamping voltage (VC) at 24.6 A peak pulse current, and 600 W peak pulse power dissipation with a 10/1000 μs waveform - deployed in automotive power supply rails, industrial sensor interfaces, and DC-DC converter input stages.
For engineers reviewing the SMBG15A-E3/52 datasheet, SMBG15A-E3/52 pinout, SMBG15A-E3/52 application, or SMBG15A-E3/52 equivalent, key selection criteria include its AEC-Q101 qualification, DO-215AA (SMBG) surface-mount package, low incremental surge resistance, and verified clamping performance under repetitive transients in harsh environments.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device that diverts surge energy to ground when reverse voltage exceeds VBR, maintaining circuit integrity during ESD, lightning-induced surges, and inductive switching transients. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), while the 150 °C maximum junction temperature supports operation in under-hood automotive and high-temperature industrial enclosures.
The SMBG15A-E3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a thermal resistance of 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads), enabling reliable thermal management without additional heatsinking in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage during 600 W transient; limits downstream IC stress below 25 V absolute maximum ratings. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; meets ISO 7637-2 Pulse 1 & 2a requirements for automotive. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection against load-dump events in 12 V vehicle electrical systems. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in engine control units and motor drive inverters. |
| Package | SMBG (DO-215AA) - Low-profile SMD outline with 0.235" × 0.255" footprint; optimized for automated placement and reflow compatibility. |
Pinout & Package
SMBG15A-E3/52 uses the SMBG (DO-215AA) surface-mount package: a two-terminal, gull-wing leaded case with cathode band marking. The device has no internal complexity - terminals are electrically isolated except for the PN junction - and requires no orientation beyond aligning the cathode band toward the protected line's higher-potential side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or common return path; forms shunt path for transient current. |
| Cathode | Protected-line interface | Connected to the line being safeguarded (e.g., 12 V rail); marked by visible band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) over lifetime and temperature extremes. |
| 600 W peak pulse power | Withstands repeated ISO 7637-2 transients without degradation; eliminates need for upstream fusing in many designs. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required pre-assembly. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes let-through voltage during surge events - critical for protecting 24 V-rated logic and gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and jump-start transients in passenger vehicles. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between battery rail and local regulator input. Use Value: Limits voltage to ≤24.4 V during 600 W surges, preventing damage to downstream LDOs and microcontrollers rated for 28 V abs max. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via unidirectional configuration with ground reference) on 4–20 mA loop lines. Use Value: Clamps fast ESD events (<1 ns response) without affecting 0.1% signal accuracy or introducing measurable capacitance (<100 pF). |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
Use Scenario: Input-stage overvoltage suppression for 12 V → 3.3 V buck converters powering FPGA I/O banks. IC Role / Device Role / Timing Role: Primary transient clamp ahead of input capacitor and controller IC. Use Value: Absorbs 10/1000 μs surges up to 24.6 A while maintaining VC < 25 V - preserving converter enable thresholds and MOSFET gate oxide integrity. | Use Scenario: Secondary-side transient suppression on -48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to system ground on negative supply rail. Use Value: Withstands repetitive 600 W pulses with <0.01% duty cycle; validated for Telcordia GR-1089-CORE compliance in central office environments. |
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 VWM (15 V), but lower PPPM = 600 W (same rating), slightly higher VC = 24.4 V (identical), identical SMB package. | No functional difference in clamping or layout; SMBJ series has broader industry adoption but same Vishay design lineage. | Select SMBJ15A-E3/52 if legacy BOM alignment or distributor stock availability is prioritized. |
| 1.5SMC15A | Same VWM/VBR/VC specs, but larger SMC (DO-214AB) package (0.315" × 0.260"); 100 A IFSM unchanged. | Requires PCB pad revision; better thermal dissipation (RθJA ≈ 60 °C/W) but incompatible with space-constrained SMB layouts. | Choose 1.5SMC15A only when enhanced thermal margin is needed and board real estate permits larger footprint. |
Compared with SMBJ15A-E3/52 and 1.5SMC15A, the SMBG15A-E3/52 offers identical electrical protection performance in a lower-profile, AEC-Q101-qualified SMBG package - making it optimal for next-generation automotive modules where height clearance and qualification rigor are mandatory.
Availability
SMBG15A-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, AEC-Q101 compliance, and repeatable surge immunity performance.
Supply support for SMBG15A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in automotive and industrial environments - balancing low profile, AEC-Q101 qualification, and repeatable 600 W surge capability in the DO-215AA outline.
FAQ
What is the clamping voltage of SMBG15A-E3/52 at its rated peak pulse current?
The SMBG15A-E3/52 has a maximum clamping voltage (VC) of 24.4 V at its specified peak pulse current (IPPM) of 24.6 A, measured using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures predictable overvoltage limiting for downstream components in the SMBG15A-E3/52 protection circuit.
Is SMBG15A-E3/52 suitable for automotive applications?
Yes, SMBG15A-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validated performance against ISO 7637-2 transients make it appropriate for engine control units, body electronics, and ADAS power domains where the SMBG15A-E3/52 is deployed.
What does the "-E3/52" suffix indicate in SMBG15A-E3/52?
The "-E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "/52" specifies packaging in 7" diameter plastic tape and reel with a base quantity of 750 units. This full suffix identifies the exact manufacturing and logistics configuration of the SMBG15A-E3/52 part supplied by Vishay.
How does SMBG15A-E3/52 differ from bidirectional TVS diodes like SMBG15CA?
SMBG15A-E3/52 is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward the protected line), whereas SMBG15CA is bidirectional and symmetrical - suitable for AC or floating signal lines. The SMBG15A-E3/52 provides lower leakage and tighter VBR tolerance than its CA counterpart, which is reflected in their respective datasheet test conditions and application guidance.
What is the thermal resistance of SMBG15A-E3/52, and how does it affect PCB layout?
The SMBG15A-E3/52 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 junction temperatures during repetitive surges, designers must adhere to this pad layout - undersized traces or insufficient copper area will increase RθJA and risk thermal runaway in the SMBG15A-E3/52.
SMBG15A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- 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 (SMBG)
SMBG15A-E3/52 FAQ
1.How can I place an order for SMBG15A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG15A-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 SMBG15A-E3/52 reliable?
The price and inventory of SMBG15A-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 SMBG15A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG15A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG15A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG15A-E3/52?
SMBG15A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG15A-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 SMBG15A-E3/52?
For technical support, including SMBG15A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG15A-E3/52 requirements.
6.How does Aetrix verify that SMBG15A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG15A-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 SMBG15A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG15A-E3/52?
All SMBG15A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG15A-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 SMBG15A-E3/52 part is unused and in its original packaging.
Return procedure for SMBG15A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG15A-E3/52 Tags
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