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Vishay General Semiconductor - Diodes Division SM15T30AHM3_A/I
- Part No.:
- SM15T30AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30AHM3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,340
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Product details
Overview
SM15T30AHM3_A/I from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor in SMC (DO-214AB) package, with 30 V standoff voltage (VWM), 34.2 V minimum breakdown voltage (VBR), and 41.5 V maximum clamping voltage (VC) at 36 A peak pulse current. It protects MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30AHM3_A/I datasheet, SM15T30AHM3_A/I pinout, SM15T30AHM3_A/I application, or SM15T30AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This device operates as a unidirectional TVS diode with glass-passivated junction and low-inductance SMC package optimized for high-energy transient suppression. Its clamping behavior is defined by a 10/1000 μs waveform, with guaranteed VC ≤ 41.5 V at IPPM = 36 A and thermal derating above TA = 25 °C per Fig. 2.
Designed for surface-mount automated placement, it features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, meets MSL Level 1 (peak reflow 260 °C), and supports failure-to-short-circuit mode under overstress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum reverse operating voltage before clamping begins; sets system-level overvoltage threshold for protected circuitry. |
| VBR (min) | 34.2 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 41.5 V at 36 A - Clamped voltage during 10/1000 μs surge; defines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against lightning and motor-switching transients. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area for thermal management at 6.5 W steady-state dissipation. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0 flammability rating; cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current during clamping; requires low-impedance PCB trace to minimize voltage overshoot. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., 12 V rail or signal input). | Defines polarity-sensitive connection point; reverse connection disables clamping function and risks device failure. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.21) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in MOSFET drivers. |
| AEC-Q101 qualified (HM3 suffix) | Validates suitability for automotive powertrain and body electronics where long-term reliability under thermal cycling is mandatory. |
| Halogen-free, RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without popcorn cracking or delamination. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load-dump and jump-start transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges up to ±120 V. Use Value: Limits clamped voltage to 41.5 V, preventing overvoltage shutdown or damage to 40 V-rated input FETs in buck controllers. | Use Scenario: Guarding PLC analog input modules against inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V sensor supply line, triggered within nanoseconds of voltage rise exceeding 30 V. Use Value: Absorbs 1500 W pulses without degradation, maintaining signal integrity during 100 ms coil de-energization events. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Surge protection on RS-485 bus lines exposed to AC mains coupling in building automation systems. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used with series resistor and common-mode choke for asymmetric line protection. Use Value: Delivers sub-50 ns response time and <1 nH parasitic inductance to preserve signal edge integrity up to 10 Mbps. | Use Scenario: Safeguarding microcontroller GPIOs and relay drivers in washing machine control boards subjected to pump motor switching noise. IC Role / Device Role / Timing Role: Localized TVS mounted directly at connector entry point to shunt transients before reaching MCU I/O pins. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), surviving repeated 10 ms half-sine faults during appliance lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | 600 W PPPM, SMA package, RθJA = 110 °C/W, no AEC-Q101 qualification | Lower power rating limits use to consumer-grade I/O protection; unsuitable for automotive under-hood locations | Select when cost sensitivity outweighs surge energy requirement and AEC-Q101 is not mandated. |
| SMCJ33A-M3/57T | 33 V VWM, 36.7 V VBR min, 53.3 V VC @ 28.1 A, same SMC package and AEC-Q101 qualification | Higher clamping voltage increases stress on 3.3 V logic interfaces; better suited for 36 V nominal systems | Choose for 36 V battery architectures where tighter VWM tolerance is less critical than higher surge margin. |
Compared with SM15T30AHM3_A/I, SMAJ30A-E3/57T offers lower cost but reduced surge capacity and no automotive qualification, while SMCJ33A-M3/57T provides identical packaging and qualification but trades 3 V higher VWM for improved overvoltage headroom at the expense of elevated clamping stress.
Availability
SM15T30AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom line interface, and consumer appliance control board designs requiring stable component supply and long-term lifecycle support.
Supply support for SM15T30AHM3_A/I 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 transient protection devices with emphasis on reliability and application-specific optimization.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 validation are essential design requirements.
FAQ
What is the clamping voltage of SM15T30AHM3_A/I at its rated peak pulse current?
The SM15T30AHM3_A/I has a maximum clamping voltage (VC) of 41.5 V at 36 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and represents the upper limit of voltage seen by protected circuitry during surge events.
Is SM15T30AHM3_A/I qualified for automotive applications?
Yes, SM15T30AHM3_A/I is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and electrostatic discharge, making it suitable for automotive powertrain and body electronics where reliability under thermal and electrical stress is critical.
What does the "HM3" suffix indicate in SM15T30AHM3_A/I?
The "HM3" suffix in SM15T30AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with automotive environmental and reliability standards, including JESD201 Class 2 whisker resistance.
How does SM15T30AHM3_A/I differ from bidirectional TVS diodes in the same series?
SM15T30AHM3_A/I is unidirectional and features a cathode band for polarity identification; it conducts only in reverse breakdown. Bidirectional variants (e.g., SM15T30CA) omit the band and suppress transients in both directions. The unidirectional version offers lower leakage and tighter VBR tolerance, making it preferred for DC rail protection where polarity is fixed.
What is the thermal resistance and maximum power dissipation of SM15T30AHM3_A/I?
SM15T30AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a steady-state power dissipation (PD) rating of 6.5 W at TA = 50 °C on an infinite heatsink. These values guide PCB layout decisions-minimum 8 mm × 8 mm copper pads per terminal are recommended to achieve specified derating curves.
SM15T30AHM3_A/I 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30AHM3_A/I FAQ
1.How can I place an order for SM15T30AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30AHM3_A/I 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 SM15T30AHM3_A/I reliable?
The price and inventory of SM15T30AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T30AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30AHM3_A/I?
SM15T30AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30AHM3_A/I 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 SM15T30AHM3_A/I?
For technical support, including SM15T30AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30AHM3_A/I requirements.
6.How does Aetrix verify that SM15T30AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T30AHM3_A/I 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 SM15T30AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T30AHM3_A/I?
All SM15T30AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30AHM3_A/I, 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 SM15T30AHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T30AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30AHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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