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Vishay General Semiconductor - Diodes Division SM15T7V5A-E3/9AT
- Part No.:
- SM15T7V5A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T7V5A-E3/9AT.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,348
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Product details
Overview
SM15T7V5A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 7.13 V minimum breakdown voltage (VBR), 6.40 V maximum stand-off voltage (VWM), 11.3 V clamping voltage (VC) at 132 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs). It is widely used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SM15T7V5A-E3/9AT datasheet, SM15T7V5A-E3/9AT pinout, SM15T7V5A-E3/9AT application, or SM15T7V5A-E3/9AT equivalent, key selection criteria include clamping performance under 132 A surge, unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T7V5A-E3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, delivering precise voltage clamping during transient events. Its 10/1000 μs waveform rating ensures robustness against lightning-induced surges and inductive switching spikes, while its low-inductance SMC package minimizes parasitic effects during fast-rising transients.
Thermal design relies on RθJA = 75 °C/W (typical) and RθJL = 15 °C/W, enabling stable operation up to TJ = 150 °C. The device fails short-circuit under overstress, supporting predictable system-level fault containment in safety-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.40 V - Maximum reverse stand-off voltage before leakage exceeds 500 μA; defines safe operating DC bias range. |
| VBR (min/max) | 7.13 V / 7.88 V at 10 mA - Ensures consistent avalanche initiation across production lots and temperature. |
| VC @ IPPM | 11.3 V at 132 A (10/1000 μs) - Limits downstream voltage stress to <11.3 V during worst-case surge. |
| PPPM | 1500 W - Sustains high-energy transients without degradation when mounted per recommended pad layout. |
| IFSM | 200 A - Withstands 10 ms half-sine surge, critical for motor drive and relay coil suppression. |
| TJ max | 150 °C - Enables use in under-hood automotive environments and enclosed industrial enclosures. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 0.320" body length and cathode band marking. |
Pinout & Package
SM15T7V5A-E3/9AT uses the SMC (DO-214AB) package: a surface-mount, unidirectional TVS diode with two terminals. Cathode is marked by a visible band on the body; anode is unmarked. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal and pulse performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VIN > VC. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating on standard PCB layouts. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<500 μA at VWM) over temperature and lifetime. |
| Low-inductance SMC package | Minimizes voltage overshoot during sub-100 ns transients, critical for protecting fast-switching MOSFET gates. |
| RoHS-compliant matte tin plating | Supports lead-free reflow (peak 260 °C) and meets J-STD-002/JESD 22-B102 solderability requirements. |
| MSL Level 1 rating | Allows unlimited floor life before reflow; eliminates baking requirements for production assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V/12 V power rails in engine control units (ECUs) and body electronics against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Clamps to 11.3 V at 132 A, preventing damage to downstream 16 V-rated components while maintaining system uptime. |
Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, or ADC inputs) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on sensor output traces, positioned adjacent to connector entry points. Use Value: Sub-12 V clamping ensures signal integrity remains intact during 8 kV contact ESD (IEC 61000-4-2), avoiding false triggers or latch-up. |
| DC Motor Drive Protection | Telecom Power Supply Input |
Use Scenario: Suppressing inductive kickback from brushed DC motors in HVAC actuators and robotic joints. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to absorb flyback energy during PWM switching. Use Value: 200 A IFSM rating handles repetitive 10 ms surges from motor commutation without degradation. |
Use Scenario: Front-end surge protection on 48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Primary clamping device on DC input bus, coordinated with upstream MOVs and fuses. Use Value: 1500 W PPPM rating sustains multi-kA lightning-induced surges (IEC 61643-11 Class II) without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower PPPM (600 W), smaller SMB package, VC = 12.0 V @ 43.3 A | Rated for lighter-duty consumer-grade surges; insufficient for IEC 61000-4-5 Level 4 | Select SMBJ7.0A only for space-constrained designs where peak surge energy is ≤600 W. |
| SMCJ7.0A | Same SMC package, identical VWM/VBR, but VC = 12.3 V @ 123 A and PPPM = 1500 W | Marginally higher clamping voltage reduces protection margin for 5 V logic rails | Choose SMCJ7.0A if board layout already accommodates SMC and tighter VC tolerance is not required. |
Compared with SMBJ7.0A and SMCJ7.0A, the SM15T7V5A-E3/9AT delivers superior clamping precision (11.3 V vs. ≥12.0 V) at full 1500 W rating, making it optimal for automotive and industrial systems demanding strict voltage limiting under high-energy threats.
Availability
SM15T7V5A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom power supplies requiring stable component supply with full traceability and long-lifecycle support.
Supply support for SM15T7V5A-E3/9AT 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, power handling, and automotive qualification.
The SM15T Series was engineered specifically for high-power transient suppression in harsh environments, targeting AEC-Q101 compliance and robustness against lightning, load dump, and inductive switching events.
FAQ
What is the clamping voltage of SM15T7V5A-E3/9AT at its rated peak pulse current?
The SM15T7V5A-E3/9AT has a maximum clamping voltage (VC) of 11.3 V when subjected to its rated peak pulse current of 132 A using the 10/1000 μs waveform. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads, ensuring repeatable performance in production designs.
Is SM15T7V5A-E3/9AT RoHS-compliant and suitable for lead-free reflow?
Yes, SM15T7V5A-E3/9AT carries the "E3" suffix, indicating RoHS-compliance and qualification for lead-free reflow with a maximum peak temperature of 260 °C. It meets J-STD-020 MSL Level 1 and JESD 22-B102 solderability standards, eliminating pre-baking requirements in high-volume SMT assembly.
How does the unidirectional configuration of SM15T7V5A-E3/9AT affect circuit placement?
The unidirectional configuration of SM15T7V5A-E3/9AT requires correct orientation: the banded end (cathode) must connect to the protected line, and the unmarked end (anode) to ground or the lower-potential reference. Reversal prevents clamping action and may cause catastrophic failure during overvoltage events.
What is the thermal resistance of SM15T7V5A-E3/9AT, and how does it impact PCB layout?
SM15T7V5A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To achieve rated power dissipation, the PCB must provide 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - reducing thermal impedance and preventing junction overheating during repeated surges.
Can SM15T7V5A-E3/9AT be used in bidirectional signal line protection?
No, SM15T7V5A-E3/9AT is unidirectional and unsuitable for bidirectional signal lines like RS-485 or USB D+/D−. For such applications, Vishay specifies bidirectional variants with "CA" suffix (e.g., SM15T7V5CA); using SM15T7V5A-E3/9AT would result in improper clamping during negative transients and potential device failure.
SM15T7V5A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 132A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T7V5A-E3/9AT FAQ
1.How can I place an order for SM15T7V5A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T7V5A-E3/9AT 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 SM15T7V5A-E3/9AT reliable?
The price and inventory of SM15T7V5A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T7V5A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T7V5A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T7V5A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T7V5A-E3/9AT?
SM15T7V5A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T7V5A-E3/9AT 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 SM15T7V5A-E3/9AT?
For technical support, including SM15T7V5A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T7V5A-E3/9AT requirements.
6.How does Aetrix verify that SM15T7V5A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T7V5A-E3/9AT 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 SM15T7V5A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T7V5A-E3/9AT?
All SM15T7V5A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T7V5A-E3/9AT, 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 SM15T7V5A-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T7V5A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T7V5A-E3/9AT Tags
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