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Vishay General Semiconductor - Diodes Division SMBG15-E3/5B
- Part No.:
- SMBG15-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG15-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,124
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Product details
Overview
SMBG15-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for robust overvoltage protection of DC power rails 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 rating per 10/1000 µs waveform - deployed in automotive power electronics and industrial sensor interfaces.
For engineers reviewing the SMBG15-E3/5B datasheet, SMBG15-E3/5B pinout, SMBG15-E3/5B application, or SMBG15-E3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, RoHS-compliant packaging details, thermal resistance data, and real-world design context for surge protection layout and reliability validation.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response (<1 ns), while the low incremental surge resistance enables effective clamping under high-current transients.
Rated for -55 °C to +150 °C junction temperature, it supports automotive-grade reliability with MSL Level 1 moisture sensitivity and JESD201 Class 1A whisker resistance. The device is not intended for bidirectional use - polarity is marked by a cathode band, and forward conduction is limited to surge conditions only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V automotive systems. |
| VBR @ IT=1 mA | 16.7–18.5 V - guaranteed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM=24.6 A | 24.4 V - clamped voltage during 10/1000 µs surge; defines worst-case stress on protected circuitry. |
| PPPM | 600 W - peak pulse power handling; validates capability against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 100 A - 8.3 ms half-sine surge rating; supports protection against load-dump events in vehicle electrical systems. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 5.0 mm × 5.0 mm copper pads; informs PCB thermal design for sustained surge duty. |
| AEC-Q101 | Qualified - certified for automotive electronic modules requiring validated reliability under temperature cycling, humidity, and mechanical stress. |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 and JESD22-B102 solderability standards. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest-potential node; completes clamping path during reverse transient. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction initiates here when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) across temperature and lifetime. |
| 600 W peak pulse power (10/1000 µs) | Validates robustness against common automotive and industrial surge waveforms without degradation. |
| AEC-Q101 qualification | Confirms suitability for under-hood ECUs, body control modules, and ADAS power domains. |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, commercial-grade E3 suffix | Meets EU Directive 2011/65/EU; suitable for non-automotive industrial and consumer applications where AEC-Q101 is not mandated. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery rail and local regulator input. Use Value: Limits voltage excursion to ≤24.4 V during 100 A/40 ms load dump, preventing damage to LDOs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional-capable protection is not required; unidirectional SMBG15-E3/5B guards against negative transients on grounded-signal paths. Use Value: Clamps induced spikes from relay switching to <25 V, preserving ADC input integrity and avoiding latch-up. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD controllers. IC Role / Device Role / Timing Role: Standoff-rated protector on +5 V or +9 V output rail, upstream of USB interface ICs. Use Value: Absorbs 600 W surges from capacitor discharge or hot-plug events while maintaining <1 µA leakage at nominal voltage. |
Use Scenario: DC feed line protection in PoE-powered base stations handling 48 V phantom power. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, placed before DC-DC converter input. Use Value: Withstands repetitive 10/1000 µs surges up to 24.6 A without parameter shift, ensuring long-term field reliability. |
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 VWM (15 V), identical DO-214AB (SMB) package but slightly higher VC (24.9 V vs. 24.4 V) and lower IPPM (24.2 A). | Lower peak pulse power (600 W same), but marginally reduced surge current capacity; less suited for high-energy load dump. | Select SMBG15-E3/5B when DO-215AA footprint and tighter clamping are prioritized; SMBJ15A-E3/5B offers broader distributor stock. |
| 1.5SMC15A | Same electrical specs (VWM=15 V, VC=24.4 V), but in larger DO-214AB (SMC) package with higher thermal mass (RθJA ≈ 40 °C/W). | Better thermal performance under repetitive surges; requires larger PCB area and incompatible footprint. | Choose 1.5SMC15A only if board layout allows SMC size and sustained surge duty cycle exceeds SMBG thermal limits. |
Compared with SMBJ15A-E3/5B and 1.5SMC15A, SMBG15-E3/5B delivers identical clamping performance in a smaller DO-215AA footprint with AEC-Q101 qualification - making it optimal for space-constrained automotive modules where validated reliability is mandatory.
Availability
SMBG15-E3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and telecom DC feeder protection requiring stable component supply and full traceability.
Supply support for SMBG15-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments - balancing compact size, AEC-Q101 compliance, and repeatable clamping performance under harsh electrical stress.
FAQ
What is the clamping voltage of SMBG15-E3/5B at its rated peak pulse current?
The SMBG15-E3/5B has a maximum clamping voltage (VC) of 24.4 V when subjected to its peak pulse current (IPPM) of 24.6 A under a 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBG15-E3/5B maintains this clamping performance across its qualified temperature range.
Is SMBG15-E3/5B suitable for bidirectional transient protection?
No, SMBG15-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias above VBR; forward conduction is limited to surge conditions and not rated for continuous operation. For bidirectional protection, Vishay specifies parts with "CA" suffix (e.g., SMBG15CA). Using SMBG15-E3/5B in bidirectional applications risks failure during positive transients - always verify polarity alignment in schematic and layout for the SMBG15-E3/5B.
Does SMBG15-E3/5B meet automotive qualification standards?
Yes, SMBG15-E3/5B is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control, body electronics, and ADAS modules. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and accelerated life testing. Note that the "E3" suffix denotes RoHS-compliant commercial grade; AEC-Q101 qualification applies to the base SMBG15A device, and the E3/5B packaging variant retains full qualification per Vishay documentation.
What is the thermal resistance of SMBG15-E3/5B, and how does it affect layout?
The SMBG15-E3/5B 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. This value directly impacts PCB thermal design: insufficient copper area raises junction temperature during repetitive surges, potentially degrading clamping consistency or accelerating wear. To maintain reliability, follow Vishay's recommended pad layout and avoid narrow traces or isolated pads for the SMBG15-E3/5B anode and cathode connections.
How does the "5B" in SMBG15-E3/5B affect packaging and ordering?
The "5B" suffix in SMBG15-E3/5B specifies the packaging format: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This contrasts with "52", which denotes 7-inch reels of 750 units. The "E3" prefix confirms RoHS compliance and commercial-grade qualification. Both variants share identical electrical and thermal specifications - the "5B" designation solely governs logistics and SMT placement compatibility, enabling high-volume automated assembly for the SMBG15-E3/5B.
SMBG15-E3/5B 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:
- 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 (SMBG)
SMBG15-E3/5B FAQ
1.How can I place an order for SMBG15-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG15-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 SMBG15-E3/5B reliable?
The price and inventory of SMBG15-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 SMBG15-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG15-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG15-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG15-E3/5B?
SMBG15-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG15-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 SMBG15-E3/5B?
For technical support, including SMBG15-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG15-E3/5B requirements.
6.How does Aetrix verify that SMBG15-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG15-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 SMBG15-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG15-E3/5B?
All SMBG15-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG15-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 SMBG15-E3/5B part is unused and in its original packaging.
Return procedure for SMBG15-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG15-E3/5B Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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