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Vishay General Semiconductor - Diodes Division SM15T18AHM3_A/H
- Part No.:
- SM15T18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
SM15T18AHM3_A/H from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 15.3 V stand-off voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA, and 25.2 V clamping voltage (VC) at 59.5 A peak pulse current (IPPM) under 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T18AHM3_A/H datasheet, SM15T18AHM3_A/H pinout, SM15T18AHM3_A/H application, or SM15T18AHM3_A/H equivalent, key selection criteria include clamping performance at rated IPPM, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
The SM15T18AHM3_A/H operates as a silicon avalanche diode designed for unidirectional transient suppression. Its junction exhibits glass passivation for reliability, low inductance for fast response, and a 10/1000 μs waveform-rated peak pulse power of 1500 W - validated with 0.31" × 0.31" copper pads per JEDEC standards.
It features a maximum operating junction temperature of +150 °C, thermal resistance of 75 °C/W (junction-to-ambient), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed by HM3 suffix and "_A/H" tape-and-reel packaging code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1 μA; sets operating margin below breakdown |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - defines precise avalanche onset threshold for predictable clamping initiation |
| VC (Clamping Voltage) | 25.2 V at 59.5 A (10/1000 μs) - limits transient voltage seen by protected downstream circuitry |
| PPPM (Peak Pulse Power) | 1500 W - sustains high-energy surges from lightning or inductive load switching without failure |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - determines required PCB copper area for thermal management at 6.5 W steady-state dissipation |
| Polarity | Unidirectional - cathode marked with band; blocks forward conduction, clamps reverse transients only |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H). Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Avalanche clamping node / protected line connection | Marked with band; connects to line being protected (e.g., 12 V rail, sensor input) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly (260 °C peak) |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time capability) |
| Glass-passivated junction | Enhances long-term stability and moisture resistance in harsh industrial environments |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surge (4 kV line-earth, 2 kV line-line) without degradation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 15.3 V. Use Value: Limits transient voltage to ≤25.2 V at 59.5 A, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector interface to absorb ESD and inductive kickback from nearby solenoids. Use Value: Clamps 8/20 μs surges to ≤32.5 V while maintaining <1 μA leakage at 15.3 V for signal integrity. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered network switches and base stations from induced lightning surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage upstream of DC/DC converters. Use Value: Absorbs 1500 W pulses without short-circuit failure, enabling fail-safe protection architecture. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to divert inductive energy during commutation. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), ensuring robustness against repeated motor switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | 600 W PPPM, SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR range | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤1 kW |
| SMCJ18A | Same SMC package and 1500 W rating, but commercial-grade (no AEC-Q101); E3/M3 suffix only | Lacks automotive qualification; not approved for under-hood use per OEM requirements | Select for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMAJ18A and SMCJ18A, the SM15T18AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 1500 W surge capability in a single automotive-grade component - eliminating need for derating or secondary qualification testing.
Availability
SM15T18AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom DC power supplies, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle support.
Supply support for SM15T18AHM3_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 and application-specific performance.
The SM15T Series was developed to deliver high-power transient suppression for automotive and industrial systems where AEC-Q101 compliance, halogen-free materials, and consistent clamping under repetitive surge stress are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T18AHM3_A/H at its rated peak pulse current?
The SM15T18AHM3_A/H has a maximum clamping voltage (VC) of 25.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 59.5 A. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per JEDEC guidelines and ensures downstream components see no more than 25.2 V during surge events. The SM15T18AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SM15T18AHM3_A/H qualified for automotive applications?
Yes, SM15T18AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and "_A/H" packaging code. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock per AEC-Q101 Rev D. The SM15T18AHM3_A/H is approved for under-hood and chassis-mounted automotive electronics where reliability under thermal and vibration stress is critical.
What does the "HM3" suffix indicate in SM15T18AHM3_A/H?
The "HM3" suffix in SM15T18AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (E3/M3) and confirms compliance with automotive environmental and reliability standards. The SM15T18AHM3_A/H also meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements.
How does SM15T18AHM3_A/H differ from SM15T18A-E3?
The SM15T18AHM3_A/H differs from SM15T18A-E3 in three key ways: it carries AEC-Q101 qualification (vs. commercial grade), uses halogen-free molding compound (vs. standard RoHS), and ships in 7" tape-and-reel with "A/H" packaging code (vs. "E3/57T"). Electrically and thermally, both share identical VWM, VBR, VC, and RθJA specs - but only SM15T18AHM3_A/H is approved for automotive production use.
What is the maximum operating temperature for SM15T18AHM3_A/H?
The SM15T18AHM3_A/H has a maximum junction temperature (TJ max.) of +150 °C, allowing reliable operation in high-temperature environments such as engine compartments, industrial motor controls, and enclosed telecom power supplies. Its thermal resistance (RθJA = 75 °C/W) requires appropriate PCB copper area to maintain junction temperature within limit at 6.5 W steady-state dissipation.
SM15T18AHM3_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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
SM15T18AHM3_A/H FAQ
1.How can I place an order for SM15T18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T18AHM3_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 SM15T18AHM3_A/H reliable?
The price and inventory of SM15T18AHM3_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 SM15T18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T18AHM3_A/H?
SM15T18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T18AHM3_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 SM15T18AHM3_A/H?
For technical support, including SM15T18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T18AHM3_A/H requirements.
6.How does Aetrix verify that SM15T18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T18AHM3_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 SM15T18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T18AHM3_A/H?
All SM15T18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T18AHM3_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 SM15T18AHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T18AHM3_A/H Tags
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