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Vishay General Semiconductor - Diodes Division SM15T15A-E3/57T
- Part No.:
- SM15T15A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15A-E3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,085
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Product details
Overview
SM15T15A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 12.8 V stand-off voltage (VWM), 14.3–15.8 V breakdown voltage (VBR), and 21.2 V clamping voltage (VC) at 71 A peak pulse current - used to protect MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15A-E3/57T datasheet, SM15T15A-E3/57T pinout, SM15T15A-E3/57T application, or SM15T15A-E3/57T equivalent, key selection criteria include unidirectional polarity, 1500 W surge capability, 12.8 V working voltage compatibility with 12 V automotive systems, and RoHS-compliant commercial-grade packaging with matte tin-plated leads.
Technical Context
The SM15T15A-E3/57T employs a glass-passivated silicon junction optimized for low-inductance transient suppression. Its clamping behavior is defined by a 10/1000 μs waveform, with thermal resistance RθJA = 75 °C/W and maximum junction temperature of 150 °C.
It operates as a unidirectional device where the cathode band denotes polarity; reverse leakage is limited to 1.0 μA at VWM, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Failure mode under overstress is short-circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum continuous reverse operating voltage before clamping begins; matches nominal 12 V rail systems. |
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA test current - ensures reliable turn-on above normal operating voltage with margin. |
| VC @ IPPM | 21.2 V at 71 A - limits transient voltage seen by protected ICs to safe levels during 1500 W surges. |
| PPPM | 1500 W (10/1000 μs) - handles high-energy lightning and inductive switching transients without degradation. |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - requires minimum 8.0 mm × 8.0 mm copper pad per terminal for thermal derating compliance. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, UL 94 V-0 molded case. Cathode indicated by band on body; anode is opposite end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal for unidirectional clamping | Connected to protected line; conducts surge current to ground when VIN exceeds VBR. |
| Anode (non-banded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1.0 μA) across temperature and lifetime. |
| Low-inductance SMC package | Minimizes voltage overshoot during fast transients (e.g., ESD, relay bounce) due to reduced parasitic L. |
| 1500 W peak pulse rating (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 threats. |
| RoHS-compliant, matte tin-plated leads | Enables lead-free reflow assembly per J-STD-002 and JESD 22-B102, with whisker resistance Class 2. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails feeding body control modules (BCM) and lighting drivers from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Clamps transients to ≤21.2 V, preventing damage to downstream regulators and microcontrollers while surviving repeated 1500 W pulses. | Use Scenario: Shielding PLC analog input channels from inductive kickback when solenoids or contactors switch off. IC Role / Device Role / Timing Role: Standoff protection element on signal conditioning PCB, mounted directly at connector entry point. Use Value: Limits induced voltage spikes to safe levels (<21.2 V) within nanoseconds, preserving ADC accuracy and isolator integrity. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: Safeguarding LIN bus or CAN FD physical layer receivers connected to external harnesses exposed to ESD and coupled noise. IC Role / Device Role / Timing Role: Secondary-level protection device placed after common-mode choke, before transceiver IC. Use Value: Suppresses sub-microsecond transients without adding capacitance that degrades signal integrity (CJ not specified but typical for SMC unidirectional is <100 pF). | Use Scenario: Guarding PoE-powered Ethernet switches against surges entering via DC input port from outdoor power injectors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input rail upstream of DC/DC conversion stage. Use Value: Absorbs up to 1500 W energy from lightning-induced surges (IEC 61000-4-5), maintaining system uptime and avoiding fuse blowouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | 600 W PPPM, SMA package, higher RθJA (100 °C/W), same VWM/VBR range | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select SMAJ15A only for cost-sensitive, space-constrained designs with verified lower threat profiles. |
| SMCJ15A | Identical SMC package, 1500 W rating, but VWM = 12.8 V, VBR = 14.3–15.8 V, VC = 21.2 V - functionally identical clamping performance | No functional difference; SMCJ15A is industry-standard designation; SM15T15A-E3/57T adds Vishay-specific qualification and tape/reel coding | SMCJ15A offers broader second-source availability; SM15T15A-E3/57T preferred for Vishay-qualified supply chains requiring E3/57T reel format. |
Compared with SMAJ15A and SMCJ15A, the SM15T15A-E3/57T delivers identical 1500 W surge handling and clamping in the SMC package but with Vishay's AEC-Q101-qualified process option available (HE3 suffix), tighter production controls, and traceable 7" tape-and-reel delivery (57T code).
Availability
SM15T15A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom power interface applications requiring stable component supply, consistent RoHS-compliant manufacturing, and full traceability from wafer to reel.
Supply support for SM15T15A-E3/57T 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, TVS, and MOSFETs with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting 12 V and 24 V automotive, industrial, and telecom infrastructure where failure modes must be predictable (short-circuit) and surge ratings must exceed 1000 W.
FAQ
What is the clamping voltage of SM15T15A-E3/57T at its rated peak pulse current?
The SM15T15A-E3/57T has a maximum clamping voltage (VC) of 21.2 V at 71 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during a full-rated transient event. The SM15T15A-E3/57T maintains this clamping performance across its operational temperature range when mounted per recommended pad layout.
Is SM15T15A-E3/57T suitable for automotive applications?
Yes, SM15T15A-E3/57T is qualified for automotive use: its base P/N-E3 variant is RoHS-compliant and commercial grade, and the AEC-Q101-qualified version (SM15T15AHE3_A/H) is available. The SM15T15A-E3/57T meets MSL Level 1, withstands 150 °C junction temperature, and provides 1500 W surge protection aligned with ISO 7637-2 requirements - making it appropriate for engine control units, body electronics, and infotainment power inputs.
What does the "E3/57T" suffix indicate in SM15T15A-E3/57T?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This configuration ensures compatibility with high-speed SMT placement equipment and supports traceable, automated manufacturing for the SM15T15A-E3/57T.
How does SM15T15A-E3/57T differ from bidirectional TVS diodes like SM15T15CA?
The SM15T15A-E3/57T is unidirectional and features a cathode band for polarity identification; it blocks forward current and clamps only in reverse. In contrast, SM15T15CA is bidirectional, with no polarity marking and symmetrical clamping in both directions. The SM15T15A-E3/57T is selected for DC power rail protection (e.g., 12 V battery lines), whereas SM15T15CA suits AC-coupled or differential signal lines like RS-485 or antenna feeds.
What thermal design considerations apply to SM15T15A-E3/57T?
SM15T15A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To avoid thermal runaway during repetitive surges, PCB layout must provide adequate copper area and minimize trace length. Derating begins above TA = 25 °C per Figure 2 in document 88380; at 85 °C ambient, usable PPPM drops to ~750 W for the SM15T15A-E3/57T.
SM15T15A-E3/57T 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15A-E3/57T FAQ
1.How can I place an order for SM15T15A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15A-E3/57T 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 SM15T15A-E3/57T reliable?
The price and inventory of SM15T15A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T15A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15A-E3/57T?
SM15T15A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15A-E3/57T 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 SM15T15A-E3/57T?
For technical support, including SM15T15A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15A-E3/57T requirements.
6.How does Aetrix verify that SM15T15A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T15A-E3/57T 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 SM15T15A-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T15A-E3/57T?
All SM15T15A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15A-E3/57T, 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 SM15T15A-E3/57T part is unused and in its original packaging.
Return procedure for SM15T15A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15A-E3/57T Tags
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