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Vishay General Semiconductor - Diodes Division SM15T30AHM3/H
- Part No.:
- SM15T30AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30AHM3/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,684
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Product details
Overview
SM15T30AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) 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 IPPM, and AEC-Q101 qualified for automotive applications. It protects MOSFETs and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30AHM3/H datasheet, SM15T30AHM3/H pinout, SM15T30AHM3/H application, or SM15T30AHM3/H equivalent, key selection criteria include clamping voltage under 42 V, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and validated performance at TJ = 150 °C in automotive-grade systems.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive IC inputs or power rails. Its glass-passivated junction ensures stable breakdown behavior, and low-inductance SMC package enables fast response to 10/1000 μs transients up to 36 A peak pulse current.
Designed for high-reliability environments, it meets MSL Level 1 per J-STD-020 (260 °C reflow peak), supports 200 A non-repetitive forward surge (10 ms half-sine), and exhibits thermal resistance RθJL = 15 °C/W - critical for sustained transient suppression without thermal runaway in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - maximum reverse operating voltage before clamping begins; defines safe DC/AC working range for protected circuitry |
| VBR min/max | 28.5 V / 31.5 V at 1.0 mA - precise breakdown threshold ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 41.5 V at 36.0 A (10/1000 μs) - clamping voltage limits stress on downstream components during worst-case surge |
| PPPM | 1500 W - peak transient energy handling capacity suitable for lightning and motor-switching threats |
| TJ max | 150 °C - junction temperature limit enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
| Polarity | Unidirectional - cathode marked by band; blocks reverse conduction until breakdown, ideal for DC rail protection |
Pinout & Package
SM15T30AHM3/H uses the standard SMC (DO-214AB) package: molded thermoset body with two coplanar gull-wing leads, 0.320" × 0.246" outline, 0.060" lead thickness, and cathode identified by a visible band on the case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal in normal bias | Connected to lower-potential side of protected line; conducts only during forward surge or fault conditions |
| Cathode | Reverse-biased terminal during normal operation | Marked with band; connects to higher-potential side (e.g., VCC rail); initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020; eliminates brominated flame retardants for safer end-of-life processing |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V or 5 V logic interfaces |
| MSL Level 1 rating | Enables single-reflow assembly without moisture sensitivity concerns; peak reflow temperature up to 260 °C |
| 1500 W peak pulse capability | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping spikes above 31.5 V while maintaining low leakage below 25.6 V. Use Value: Prevents latch-up or gate oxide damage in MCU power domains using verified 1500 W surge margin per ISO 7637-2 Pulse 5a. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC modules from ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting transients before reaching op-amp input stage. Use Value: Limits clamped voltage to ≤41.5 V, preserving 24 V sensor supply integrity and ensuring <1 μA leakage at 24 V nominal. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs against induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on DC bias rails feeding PHY ICs. Use Value: Delivers 36 A peak pulse current handling with 41.5 V clamping - compatible with IEEE 802.3af/bt surge test profiles. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD controllers. IC Role / Device Role / Timing Role: Placed across +5 V/3.3 V outputs to clamp switching noise from synchronous rectifiers. Use Value: Maintains 1.0 μA max reverse leakage at 25.6 V, avoiding standby current penalty while delivering 1500 W transient immunity. |
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 | Same SMC package, 30 V VWM, but 400 W PPPM (vs. 1500 W); lower IPPM = 11.9 A | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade surge immunity | Select SM15T30AHM3/H when system-level surge testing requires ≥1500 W rating and automotive qualification |
| 1.5SMC33A-H | Same 1500 W rating and SMC package, but VWM = 28.2 V, VBR = 31.4–34.7 V, VC = 45.7 V at 33 A | Higher clamping voltage reduces margin for 3.3 V logic protection; no AEC-Q101 option available | Choose SM15T30AHM3/H for tighter clamping (41.5 V) and guaranteed automotive qualification in safety-critical designs |
Compared with SMAJ30A-E3/57T and 1.5SMC33A-H, SM15T30AHM3/H delivers superior surge robustness (1500 W), lower clamping voltage (41.5 V), and certified AEC-Q101 reliability - making it the preferred choice for automotive power electronics and industrial equipment requiring field-proven transient immunity.
Availability
SM15T30AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply designs requiring stable component supply with halogen-free, AEC-Q101-qualified transient protection.
Supply support for SM15T30AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be controlled and clamping precision is critical to system-level EMC compliance.
FAQ
What is the clamping voltage of SM15T30AHM3/H at its rated peak pulse current?
The SM15T30AHM3/H has a maximum clamping voltage (VC) of 41.5 V when subjected to its rated peak pulse current (IPPM) of 36.0 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SM15T30AHM3/H maintains this clamping performance across its full operating temperature range.
Is SM15T30AHM3/H suitable for automotive applications?
Yes, SM15T30AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HM3. It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. Its 150 °C maximum junction temperature and halogen-free construction meet stringent OEM requirements for under-hood and chassis-mounted electronics.
What does the "HM3" suffix indicate in SM15T30AHM3/H?
The "HM3" suffix in SM15T30AHM3/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. Per Vishay's ordering nomenclature, HM3 confirms compliance with JEDEC J-STD-020 MSL Level 1, JESD201 Class 2 whisker resistance, and material restrictions outlined in document 99912. It distinguishes this grade from commercial-only variants like E3 or M3.
How does SM15T30AHM3/H differ from bidirectional TVS diodes in the same series?
SM15T30AHM3/H is unidirectional and features a cathode band marking; it conducts only in reverse breakdown and blocks forward current beyond its VF. Bidirectional variants (e.g., SM15T30CA) lack polarity marking and suppress transients in both directions. The SM15T30AHM3/H is intended for DC rail protection where polarity is fixed, offering tighter parameter control than symmetrical counterparts.
What is the thermal resistance from junction to lead (RθJL) for SM15T30AHM3/H?
The SM15T30AHM3/H has a typical thermal resistance from junction to lead (RθJL) of 15 °C/W, as specified in the Thermal Characteristics table of Vishay document 88380. This low value enables efficient heat transfer from the silicon die to PCB copper pads during repetitive transient events, supporting reliable operation without derating in properly designed layouts with recommended 0.31" × 0.31" copper pads per terminal.
SM15T30AHM3/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:
- 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/H FAQ
1.How can I place an order for SM15T30AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30AHM3/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 SM15T30AHM3/H reliable?
The price and inventory of SM15T30AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30AHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T30AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30AHM3/H?
SM15T30AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30AHM3/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 SM15T30AHM3/H?
For technical support, including SM15T30AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30AHM3/H requirements.
6.How does Aetrix verify that SM15T30AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T30AHM3/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 SM15T30AHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T30AHM3/H?
All SM15T30AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30AHM3/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 SM15T30AHM3/H part is unused and in its original packaging.
Return procedure for SM15T30AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30AHM3/H Tags
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