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Vishay General Semiconductor - Diodes Division SM6T15A-E3/5B
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- Part No.:
- SM6T15A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15A-E3/5B.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
SM6T15A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 15 V breakdown voltage (VBR = 14.3–15.8 V at 1.0 mA), 21.2 V maximum clamping voltage (VC) at 28.0 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SM6T15A-E3/5B datasheet, SM6T15A-E3/5B pinout, SM6T15A-E3/5B application, or SM6T15A-E3/5B equivalent, key selection criteria include standoff voltage (VWM = 12.8 V), low clamping ratio (VC/VBR ≈ 1.45), RoHS-compliant matte tin terminals, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
The SM6T15A-E3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM), while low inductance supports fast transient response under 10/1000 μs surge conditions.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and TJ(max) = 150 °C, with derating above 25 °C per Figure 2. The device meets MSL Level 1 (J-STD-020) and is rated for 100 A non-repetitive forward surge (IFSM, 10 ms half-sine), confirming suitability for high-energy inductive load switching protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 21.2 V at 28.0 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability without failure under standardized surge waveform |
| IFSM | 100 A - surge current rating for 10 ms half-sine, critical for relay/coil switch-off transient suppression |
| TJ(max) | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance indicating need for minimum 5.0 mm × 5.0 mm copper pads for full power rating |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; carries surge current during clamping |
| Cathode | Avalanche breakdown terminal | Marked end; connected to higher-potential side (e.g., VCC rail or signal line); initiates conduction above VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive kickback) |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak, simplifying SMT manufacturing |
| RoHS-compliant (E3 suffix) | Meets global environmental compliance requirements without halogen-free trade-offs in commercial grade |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp overvoltage before it reaches downstream regulators and microcontrollers. Use Value: Limits peak rail voltage to 21.2 V during 28 A surge, preventing damage to 24 V-rated LDOs and CAN transceivers. | Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from ESD and field wiring faults in factory automation sensors. IC Role / Device Role / Timing Role: TVS mounted across signal and return path to shunt fast transients before they couple into precision DACs or op-amps. Use Value: Clamps 8/20 μs surges to ≤27.2 V at 147 A, preserving signal integrity and avoiding ADC saturation or latch-up. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor to absorb differential-mode surges before they stress switching FETs. Use Value: Withstands 600 W pulses without degradation, maintaining reliability over >100,000 surge events per IEC 61000-4-5 Class 3. | Use Scenario: Shielding PoE-powered devices (e.g., IP cameras) from induced surges on 48 V DC feed lines in outdoor installations. IC Role / Device Role / Timing Role: TVS installed between DC+ and DC− rails to clamp common-mode transients entering via Ethernet cabling. Use Value: Low VC/VBR ratio (1.45) ensures protected PHY ICs remain below absolute maximum ratings during 10/1000 μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same SMB package, identical VBR (14.3–15.8 V) and VC (21.2 V), but rated for 400 W PPPM (vs. 600 W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 Pulse 5a | Select SMAJ15A only where surge energy is constrained and cost sensitivity outweighs headroom needs. |
| P6SMB15A | Identical electrical specs and SMB package; differs in branding and tape/reel packaging (P6SMB15A-E3/5B vs. SM6T15A-E3/5B) | No functional difference; both Vishay parts with same die, test flow, and qualification (AEC-Q101 available in HE3 variant) | P6SMB15A-E3/5B is direct form-fit-function replacement; preferred when dual-sourcing or legacy BOM alignment is required. |
Compared with SMAJ15A and P6SMB15A, the SM6T15A-E3/5B delivers higher surge margin (600 W vs. 400 W) while maintaining identical footprint and clamping behavior - making it optimal for automotive and industrial designs requiring extended surge endurance without layout change.
Availability
SM6T15A-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor signal line protection, and consumer power adapter input stage applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SM6T15A-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 and automotive-grade qualification.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning-induced surges is mission-critical.
FAQ
What is the standoff voltage (VWM) of the SM6T15A-E3/5B?
The SM6T15A-E3/5B has a maximum reverse standoff voltage VWM of 12.8 V at 25 °C. This value ensures the device remains non-conductive under normal operating conditions while allowing up to 1.0 μA leakage current - critical for preserving efficiency in always-on 12 V systems. Exceeding VWM risks premature conduction and increased power loss.
Is the SM6T15A-E3/5B RoHS-compliant and halogen-free?
The SM6T15A-E3/5B carries the E3 suffix, confirming RoHS compliance per EU Directive 2011/65/EU. It is not halogen-free; for halogen-free versions, select the M3 suffix variant (e.g., SM6T15A-M3/5B). Both E3 and M3 meet JESD 201 Class 2 whisker resistance and J-STD-002 solderability standards.
Does the SM6T15A-E3/5B have AEC-Q101 qualification?
The base SM6T15A-E3/5B is commercial-grade and not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under the HE3 suffix (e.g., SM6T15AHE3_B/I). These variants undergo additional stress testing and are marked with "HE3" in the ordering code - essential for automotive under-hood applications.
What is the maximum clamping voltage (VC) of the SM6T15A-E3/5B under surge conditions?
The SM6T15A-E3/5B exhibits a maximum clamping voltage VC of 21.2 V at 28.0 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This clamping level protects downstream 24 V-rated components by limiting transient overvoltage to a safe margin below their absolute maximum ratings.
What PCB pad layout is required to achieve the full 600 W rating for the SM6T15A-E3/5B?
To sustain the full 600 W peak pulse power rating, the SM6T15A-E3/5B must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Figure 2 of the datasheet. Smaller pads cause thermal derating and reduce surge capability - verified by Vishay's thermal characterization under defined mounting conditions.
SM6T15A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T15A-E3/5B FAQ
1.How can I place an order for SM6T15A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15A-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 SM6T15A-E3/5B reliable?
The price and inventory of SM6T15A-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 SM6T15A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T15A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15A-E3/5B?
SM6T15A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15A-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 SM6T15A-E3/5B?
For technical support, including SM6T15A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15A-E3/5B requirements.
6.How does Aetrix verify that SM6T15A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T15A-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 SM6T15A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T15A-E3/5B?
All SM6T15A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15A-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 SM6T15A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T15A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15A-E3/5B Tags
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