My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T15AHE3/9AT
- Part No.:
- SM15T15AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHE3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,997
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T15AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 15 V standoff voltage (VWM = 12.8 V), 1500 W peak pulse power (10/1000 μs), 21.2 V clamping voltage at 71 A peak pulse current, and AEC-Q101 qualified for automotive applications. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15AHE3/9AT datasheet, SM15T15AHE3/9AT pinout, SM15T15AHE3/9AT application, or SM15T15AHE3/9AT equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 75 °C/W), polarity marking (cathode band), JEDEC-compliant SMC package dimensions, and AEC-Q101 qualification status - all critical for automotive-grade surge protection design.
Technical Context
The SM15T15AHE3/9AT employs a glass-passivated silicon junction optimized for low-inductance transient clamping with fast response to 10/1000 μs waveforms. Its unidirectional polarity enables integration into DC-biased power rails and I/O lines where reverse conduction must be blocked.
Designed for high-source-impedance threat environments (e.g., external I/O lines, motor drive feedback paths), it operates within -65 °C to +150 °C junction temperature range and fails short-circuit under overstress - a predictable, system-safe failure mode confirmed in Vishay's reliability testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - Maximum continuous reverse voltage before clamping begins; sets minimum operating margin above 12 V nominal rail. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at 1 mA - Confirmed avalanche initiation threshold; ensures reliable turn-on before downstream device damage. |
| VC (Clamping Voltage) | 21.2 V at IPPM = 71 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case transient; limits stress on 24 V-tolerant ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains standardized lightning surge energy without degradation; validated per IEC 61000-4-5 Level 4 compliance path. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on 8 mm × 8 mm copper pads; determines derating needed above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports under-hood automotive placement with proper layout. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Anode of internal PN junction | Connected to protected line; clamps when line voltage exceeds VWM + dynamic margin - polarity must match DC bias direction. |
| Anode (unmarked end) | Cathode of internal PN junction | Typically tied to ground or lower-potential reference; forms low-impedance shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 4 kV surge tests on 2 Ω/42 Ω coupling networks without derating. |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA at 12.8 V) over lifetime and temperature; eliminates passivation-related drift. |
| Low inductance construction | Minimizes voltage overshoot during fast transients (e.g., ESD, relay bounce); critical for protecting <10 ns response ICs. |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking - simplifies SMT manufacturing for high-volume auto OEMs. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) 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 24 V-rated buck controller ICs while maintaining AEC-Q101 compliance. |
Use Scenario: Analog output line (0–5 V) from pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting induced switching noise from nearby VFDs. Use Value: Limits voltage excursion to 21.2 V during 1 kV/μs transients, preserving ADC accuracy and avoiding latch-up in op-amp front-end. |
| Telecom Interface Protection | Consumer Appliance Motor Drive Feedback |
Use Scenario: RS-485 bus line in outdoor security camera housing subject to lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on A/B lines referenced to local ground plane. Use Value: Withstands 1500 W pulses without degradation, enabling single-device protection compliant with ITU-T K.21 Basic Level. |
Use Scenario: Hall-effect position feedback line from BLDC motor in smart washing machine control board. IC Role / Device Role / Timing Role: TVS placed adjacent to MCU GPIO pin to suppress commutation spikes from motor windings. Use Value: Fast clamping (sub-ns response) prevents false triggering of edge-sensitive interrupt inputs during 100 A coil de-energization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Same VWM (12.8 V) and VC (21.2 V), but 400 W PPPM rating and SMA package (smaller thermal mass). | Limited to lower-energy threats (IEC 61000-4-4 Level 3); unsuitable for ISO 7637-2 Pulse 5a or lightning surges. | Select only for space-constrained consumer designs with <500 W threat profiles and no automotive qualification requirement. |
| SMCJ15AHE3/9AT | Identical VWM, VBR, VC, and AEC-Q101 qualification, but 3000 W PPPM rating and larger SMC package footprint. | Over-spec'd for 1500 W threats; requires larger PCB area and higher cost; same thermal interface but higher surge margin. | Choose when future-proofing against higher-level IEC 61000-4-5 testing or when shared BOM with 3 kW systems reduces procurement complexity. |
Compared with SMAJ15A-E3/57T, SM15T15AHE3/9AT delivers 275 % higher surge energy handling in the same SMC footprint; versus SMCJ15AHE3/9AT, it offers identical automotive qualification at 50 % lower cost and smaller thermal solution requirements for 1.5 kW-class protection.
Availability
SM15T15AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom data lines, and appliance motor control systems requiring stable component supply with full AEC-Q101 traceability and 13" tape-and-reel delivery.
Supply support for SM15T15AHE3/9AT 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM15T Series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment 12 V/24 V systems, balancing high-power clamping, low leakage, and manufacturability in SMC packaging.
FAQ
What is the clamping voltage of SM15T15AHE3/9AT at its rated peak pulse current?
The SM15T15AHE3/9AT has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its peak pulse current of 71 A. This value is measured under standardized test conditions per JEDEC and is guaranteed across the full operating temperature range. The clamping performance of SM15T15AHE3/9AT ensures protected circuits remain below critical voltage thresholds during surge events.
Is SM15T15AHE3/9AT suitable for automotive applications?
Yes, SM15T15AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes rigorous stress testing including high-temperature reverse bias, temperature cycling, and humidity testing. SM15T15AHE3/9AT is commonly deployed in engine control units, body electronics, and ADAS sensors where reliability under thermal and electrical stress is mandatory.
What does the "9AT" suffix indicate in SM15T15AHE3/9AT?
The "9AT" suffix denotes the packaging configuration: 13-inch diameter plastic tape-and-reel with a base quantity of 3500 units. This format supports high-speed automated placement in SMT lines. SM15T15AHE3/9AT uses the same die and qualification as other HE3 variants - only the reel size and quantity differ from alternatives like /57T (7-inch reel, 850 units).
How does SM15T15AHE3/9AT differ from bidirectional versions like SM15T15CA?
SM15T15AHE3/9AT is unidirectional and features a cathode band marking; it conducts only during positive transients relative to its anode. In contrast, SM15T15CA is bidirectional with no polarity marking and clamps symmetrically in both directions. SM15T15AHE3/9AT is used on DC-biased lines (e.g., 12 V supply), whereas SM15T15CA suits AC-coupled or floating signal lines like RS-485.
What is the thermal resistance of SM15T15AHE3/9AT, and how does it affect layout?
The SM15T15AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C at full 1500 W pulse, PCB layout must provide adequate copper area and avoid thermal bottlenecks. SM15T15AHE3/9AT requires no heatsink for single-pulse events but benefits from thermal vias in high-duty-cycle applications.
SM15T15AHE3/9AT 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T15AHE3/9AT FAQ
1.How can I place an order for SM15T15AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHE3/9AT 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 SM15T15AHE3/9AT reliable?
The price and inventory of SM15T15AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T15AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHE3/9AT?
SM15T15AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHE3/9AT 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 SM15T15AHE3/9AT?
For technical support, including SM15T15AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHE3/9AT requirements.
6.How does Aetrix verify that SM15T15AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T15AHE3/9AT 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 SM15T15AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T15AHE3/9AT?
All SM15T15AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHE3/9AT, 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 SM15T15AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T15AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHE3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
