My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T15AHM3_A/H
- Part No.:
- SM15T15AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHM3_A/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T15AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 15 V standoff voltage (VWM), 15.8 V maximum breakdown voltage (VBR), 21.2 V clamping voltage at 71 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15AHM3_A/H datasheet, SM15T15AHM3_A/H pinout, SM15T15AHM3_A/H application, or SM15T15AHM3_A/H equivalent, key selection criteria include clamping performance under 71 A IPPM, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed for transient suppression in DC-biased circuits where reverse conduction must be blocked. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 12.8 V).
The device delivers 1500 W peak pulse power handling with low clamping ratio (VC/VBR ≈ 1.34) and low inductance due to SMC package geometry, enabling effective protection of sensitive nodes without signal distortion. It meets MSL Level 1 reflow profile (260 °C peak) and supports industrial and automotive temperature range (–65 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below breakdown. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at 1.0 mA - Tight tolerance ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 21.2 V at 71.0 A (10/1000 μs) - Limits downstream voltage stress during surge; enables robust IC/MOSFET protection. |
| PPPM (Peak Pulse Power) | 1500 W - Handles high-energy transients like lightning surges or motor coil switching without failure. |
| RθJA | 75 °C/W - Requires minimum 8.0 mm × 8.0 mm copper pad per terminal for thermal derating above 25 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including engine control units and body electronics. |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with standard SMT pick-and-place; 0.320" × 0.246" outline. |
Pinout & Package
SM15T15AHM3_A/H uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and cathode band marking on the unidirectional variant. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides low-impedance path to ground during transient clamping; must be routed with minimal inductance. |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line | Receives transient energy from protected node (e.g., 12 V rail or sensor input); polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without degradation. |
| Low clamping voltage (21.2 V @ 71 A) | Keeps protected ICs within absolute maximum ratings during 100 ns–1 ms transients. |
| AEC-Q101 qualified & halogen-free | Meets automotive reliability and environmental requirements for under-hood and ADAS subsystems. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without popcorn cracking or delamination during PCB assembly. |
| Glass-passivated junction | Ensures stable VBR over lifetime and reduces parameter drift under thermal cycling. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load-dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and LDO input. Use Value: Prevents LDO destruction during 120 V/50 ms load-dump pulses by limiting voltage to ≤21.2 V at 71 A peak. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on 4–20 mA loop output lines. Use Value: Maintains signal integrity with <1.0 μA leakage at 12.8 V while clamping 8 kV contact ESD to <25 V. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and data lines in outdoor base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails upstream of DC-DC converters. Use Value: Absorbs 1500 W surge energy without short-circuit failure, preserving system uptime during field deployment. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Clamp diode across motor terminals to limit flyback voltage to safe levels. Use Value: Extends MOSFET lifespan by reducing VDS stress from >100 V spikes to ≤21.2 V during commutation. |
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), lower PPPM (400 W), SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load-dump | Select when space-constrained and threat level is <500 W (e.g., USB port ESD only) |
| SMCJ15A-M3/57T | Same VWM and PPPM (1500 W), but commercial-grade (non-AEC-Q101), same SMC package | Acceptable for industrial/commercial use; not certified for automotive safety-critical systems | Choose for cost-sensitive non-automotive designs requiring identical clamping and power rating |
Compared with SM15T15AHM3_A/H, SMAJ15A-E3/57T offers reduced surge capability in a smaller footprint, while SMCJ15A-M3/57T matches power and clamping but lacks AEC-Q101 validation-making SM15T15AHM3_A/H the sole choice for production automotive ECUs requiring halogen-free, qualified components.
Availability
SM15T15AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line card surge protection requiring stable component supply, AEC-Q101 compliance, and halogen-free RoHS materials.
Supply support for SM15T15AHM3_A/H 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 devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T15AHM3_A/H at its rated peak pulse current?
The SM15T15AHM3_A/H has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at 71.0 A peak pulse current. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T15AHM3_A/H maintains this clamping performance across its operational temperature range.
Is SM15T15AHM3_A/H qualified for automotive applications?
Yes, SM15T15AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation (Document Number: 88380). It is rated for operation from –65 °C to +150 °C and validated for reliability in automotive powertrain and body electronics. The SM15T15AHM3_A/H meets all stress tests required for automotive-grade TVS diodes, including temperature cycling and humidity bias.
What does the "HM3" suffix in SM15T15AHM3_A/H indicate?
The "HM3" suffix in SM15T15AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" specifies the tape-and-reel packaging format (7" reel, 850 units), while "M3" confirms halogen-free molding compound and whisker-resistant matte tin plating. This distinguishes SM15T15AHM3_A/H from commercial variants like SM15T15A-M3/57T, which lack automotive qualification.
How does SM15T15AHM3_A/H compare to bidirectional TVS diodes in the same series?
SM15T15AHM3_A/H is unidirectional and features a cathode band marking; bidirectional variants (e.g., SM15T15CA) use "CA" suffix and have no polarity marking. The SM15T15AHM3_A/H provides reverse-blocking capability essential for DC-biased lines, whereas bidirectional types protect AC or floating signals. Clamping and power ratings are identical, but circuit integration differs due to polarity sensitivity.
What is the thermal resistance of SM15T15AHM3_A/H, and how does it affect layout?
The SM15T15AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperature under 6.5 W steady-state dissipation or high-duty-cycle transients, PCB layout must allocate sufficient copper area and avoid thermal bottlenecks. Reducing pad size increases RθJA and risks thermal runaway during repeated surges.
SM15T15AHM3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T15AHM3_A/H FAQ
1.How can I place an order for SM15T15AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHM3_A/H 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 SM15T15AHM3_A/H reliable?
The price and inventory of SM15T15AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T15AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHM3_A/H?
SM15T15AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHM3_A/H 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 SM15T15AHM3_A/H?
For technical support, including SM15T15AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHM3_A/H requirements.
6.How does Aetrix verify that SM15T15AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T15AHM3_A/H 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 SM15T15AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T15AHM3_A/H?
All SM15T15AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHM3_A/H, 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 SM15T15AHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T15AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHM3_A/H 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 …
