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Vishay General Semiconductor - Diodes Division SM15T30AHM3/I
- Part No.:
- SM15T30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30AHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
SM15T30AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM = 25.6 V), 41.5 V clamping voltage at 36 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 SM15T30AHM3/I datasheet, SM15T30AHM3/I pinout, SM15T30AHM3/I application, or SM15T30AHM3/I equivalent, key selection criteria include clamping voltage vs. IPPM, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 μA leakage at 25.6 V), then rapidly avalanches to clamp transients above its 28.5–31.5 V breakdown range. Its low-inductance SMC package enables fast response (<1 ns) to 10/1000 μs surges up to 36 A.
Designed for automotive-grade reliability, SM15T30AHM3/I meets AEC-Q101 stress tests and features glass-passivated junction, matte tin-plated leads solderable per J-STD-002, and MSL Level 1 rating (260 °C peak reflow). It fails short-circuit in overstress, preserving downstream circuit integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 41.5 V at 36 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 1500 W - Sustains standardized lightning-surge energy without degradation when mounted on 8 mm × 8 mm copper pads |
| RθJA (Thermal Resistance) | 75 °C/W - Junction-to-ambient thermal path determines derating above 25 °C ambient; critical for sustained power dissipation planning |
| TJmax | 150 °C - Maximum allowable junction temperature; sets upper limit for thermal design and layout copper area |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, halogen-free, RoHS-compliant. Cathode indicated by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to protected line's ground or low-side return; completes clamping path during overvoltage |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line's signal/power rail; avalanche conduction occurs when rail exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control, ADAS sensors, and infotainment power rails |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surge (4 kV line-earth) when properly laid out on PCB |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; improves humidity robustness |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns response); critical for protecting high-speed interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground. Use Value: Clamps spikes to ≤41.5 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA signal paths. Use Value: Limits transient-induced offset errors and prevents latch-up in op-amp front-ends during motor switching events. |
| Consumer Device USB Port Protection | Telecom Base Station Power Input |
Use Scenario: Adding secondary surge protection on VBUS line of USB-C ports in laptops and docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS upstream of USB power delivery controller. Use Value: Blocks >25 V surges while maintaining <1 μA leakage at 5 V, avoiding false disconnect detection. | Use Scenario: Front-end protection of -48 V telecom rectifier inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-energy unidirectional TVS on negative supply rail. Use Value: Absorbs 1500 W pulses without failure, enabling compliance with GR-1089-CORE Zone 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | 600 W PPPM, same VWM/VC, SMA package (higher RθJA = 110 °C/W) | Limited to lower-energy threats; unsuitable for automotive load-dump per ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs surge energy requirement and board space allows larger thermal pad |
| SM15T30AHM3/A | Identical electrical specs; differs only in tape-and-reel packaging (7" vs. 13" reel, 850 vs. 3500 units) | No functional difference; identical AEC-Q101 qualification and halogen-free material | Choose based on production volume and SMT line feeder compatibility |
Compared with SM15T30AHM3/I, SMAJ30A-E3/57T offers lower surge handling and reduced thermal performance, while SM15T30AHM3/A is a packaging variant with no electrical or reliability distinction-making HM3/I optimal for high-volume automotive manufacturing requiring 13" reels and traceable sourcing.
Availability
SM15T30AHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply across extended production lifecycles.
Supply support for SM15T30AHM3/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 protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure modes must be controlled and long-term stability is mandatory.
FAQ
What is the clamping voltage of SM15T30AHM3/I at its rated peak pulse current?
The SM15T30AHM3/I has a maximum clamping voltage (VC) of 41.5 V when subjected to a 10/1000 μs waveform at 36 A peak pulse current (IPPM). This value is measured under standard test conditions with 0.31" × 0.31" copper pads per terminal and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T30AHM3/I maintains this clamping performance across its specified operating temperature range.
Is SM15T30AHM3/I suitable for automotive applications?
Yes, SM15T30AHM3/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HM3" suffix indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It meets stress test requirements for temperature cycling, humidity, and mechanical shock relevant to engine bay and chassis-mounted electronics. The SM15T30AHM3/I is commonly deployed in powertrain control modules and ADAS sensor interfaces.
How does the SM15T30AHM3/I differ from non-AEC-Q101 versions like SM15T30A-E3/57T?
The SM15T30AHM3/I differs from SM15T30A-E3/57T in three verified aspects: (1) AEC-Q101 qualification testing per automotive stress standards; (2) halogen-free material composition; and (3) JESD201 Class 2 whisker resistance. Electrically and thermally, both share identical VWM, VBR, VC, and PPPM ratings. The SM15T30AHM3/I is required for Tier 1 automotive BOMs where qualification evidence is mandatory.
What is the thermal resistance of SM15T30AHM3/I, and how does it affect layout?
The SM15T30AHM3/I 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. This value directly governs safe power derating above 25 °C ambient: for example, at 85 °C ambient, maximum continuous power drops to ~3.3 W. Layout must provide minimum recommended pad area and avoid thermal isolation to maintain SM15T30AHM3/I reliability under repeated surge conditions.
Does SM15T30AHM3/I have polarity markings, and how is it installed?
Yes, SM15T30AHM3/I is unidirectional and marked with a cathode band on the SMC (DO-214AB) package body. During installation, the banded end connects to the line being protected (e.g., 12 V rail), while the anode connects to ground. Reversing polarity prevents clamping action and risks catastrophic failure under reverse bias. The SM15T30AHM3/I datasheet confirms cathode identification and specifies mounting orientation for optimal thermal and electrical performance.
SM15T30AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SM15T30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30AHM3/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/I reliable?
The price and inventory of SM15T30AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SM15T30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30AHM3/I?
SM15T30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30AHM3/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/I?
For technical support, including SM15T30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30AHM3/I requirements.
6.How does Aetrix verify that SM15T30AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T30AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SM15T30AHM3/I?
All SM15T30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30AHM3/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/I part is unused and in its original packaging.
Return procedure for SM15T30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30AHM3/I Tags
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