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Vishay General Semiconductor - Diodes Division SM15T33AHM3/H
- Part No.:
- SM15T33AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33AHM3/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,893
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Product details
Overview
SM15T33AHM3/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), 33 V standoff voltage (VWM = 28.2 V), 45.7 V clamping voltage at 33 A peak pulse current, and AEC-Q101 qualified for automotive applications. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T33AHM3/H datasheet, SM15T33AHM3/H pinout, SM15T33AHM3/H application, or SM15T33AHM3/H equivalent, this page delivers verified electrical parameters, automotive-grade qualification status, clamping performance under 10/1000 μs surge, 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 unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above 33 V standoff while maintaining low leakage (<1.0 μA at VWM). Its glass-passivated junction ensures stable breakdown behavior and low inductance for fast response to ESD and lightning-induced surges.
The SM15T33AHM3/H is rated for 1500 W peak pulse power per 10/1000 μs waveform, with a maximum junction temperature of +150 °C and thermal resistance of 75 °C/W (junction-to-ambient, mounted on 8.0 mm × 8.0 mm copper pads). It meets MSL Level 1 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1.0 mA - Confirmed breakdown threshold range ensuring reliable turn-on during transients. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 33 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy threats like lightning-induced surges on I/O lines without failure. |
| TJmax | +150 °C - Enables operation in under-hood automotive environments with extended thermal headroom. |
| RθJA | 75 °C/W - Predictable thermal rise on standard PCB pad layout; informs heatsinking requirements. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress-test standards including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode | Current exit terminal in forward bias; marked with black band | Connected to protected line (e.g., CAN_H, LIN, sensor supply); determines unidirectional clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching and ISO 7637-2 pulse 1/2a/5a without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per JESD47. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs-critical for 3.3 V/5 V logic and automotive microcontrollers. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without preconditioning or special handling. |
| Halogen-free, JESD201 Class 2 whisker resistant | Ensures long-term solder joint reliability in vibration-prone automotive modules and industrial controls. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on 5 V sensor supply and signal outputs. Use Value: Prevents latch-up or damage to precision ADC inputs and op-amps by limiting voltage to ≤45.7 V during 33 A surges. |
Use Scenario: Safeguarding RS-485/RS-232 communication lines between PLCs and motor drives subject to EFT and surge events. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector interface to absorb 10/1000 μs coupling noise. Use Value: Maintains signal integrity by clamping transients within 1 ns response time and holding VC < 46 V at full rated IPPM. |
| Automotive Body Control Module (BCM) | Consumer Appliance Power Supply Input |
|
Use Scenario: Shielding LIN bus transceivers and window lift motor drivers from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage protection on 12 V rail feeding BCM sub-circuits. Use Value: AEC-Q101 qualification ensures functional safety compliance; 28.2 V VWM provides margin above nominal 12 V ±15 %. |
Use Scenario: Suppressing switching noise and surge events on AC-DC adapter input stage in smart home appliances. IC Role / Device Role / Timing Role: Secondary-level transient suppression after MOV, providing precise clamping for downstream rectifier and controller ICs. Use Value: 1500 W rating handles repetitive 10/1000 μs surges per IEC 61000-4-5; low leakage (<1 μA) avoids standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VWM (28.2 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy threats; not AEC-Q101 qualified; suitable for consumer-grade non-automotive designs. | Select when cost or board space is critical and surge threat level is ≤400 W (e.g., USB port protection). |
| SMCJ33A-QH | Same SMC package, identical VWM/VC, but rated for 1500 W and AEC-Q101; differs in halogen content (not halogen-free) and whisker test class (Class 1) | Acceptable for automotive use where halogen-free requirement is waived; may require updated material compliance documentation. | Choose when halogen-free specification is not mandated but AEC-Q101 and SMC form factor are required. |
Compared with SMAJ33A-E3/57T and SMCJ33A-QH, the SM15T33AHM3/H uniquely combines halogen-free construction, JESD201 Class 2 whisker resistance, and AEC-Q101 qualification in a 1500 W SMC package-making it the only option meeting full Tier-1 automotive material and reliability requirements for safety-critical sensor interfaces.
Availability
SM15T33AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O safeguarding, and body control module (BCM) power rail stabilization requiring stable component supply across multi-year production cycles.
Supply support for SM15T33AHM3/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 efficiency, and automotive-grade validation.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where robustness against lightning, EFT, and load-dump events is mandatory.
FAQ
What is the clamping voltage of SM15T33AHM3/H at its rated peak pulse current?
The SM15T33AHM3/H has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current (IPPM) of 33 A under the standardized 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 surge events.
Is SM15T33AHM3/H suitable for automotive applications?
Yes, SM15T33AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It has passed stress tests including temperature cycling, high-temperature reverse bias, and humidity testing-making it approved for use in engine control units, body control modules, and ADAS sensor interfaces.
What does the "HM3" suffix mean in SM15T33AHM3/H?
The "HM3" suffix in SM15T33AHM3/H denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive material requirements per Vishay's ordering nomenclature in document 88380.
What is the thermal resistance of SM15T33AHM3/H, and how is it measured?
The SM15T33AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is used to estimate junction temperature rise under steady-state power dissipation.
How does SM15T33AHM3/H differ from bidirectional TVS diodes like SM15T33CA?
The SM15T33AHM3/H is unidirectional with cathode-band polarity and conducts only in reverse breakdown, while SM15T33CA is bidirectional and suppresses transients in both directions. The unidirectional version offers lower leakage (<1.0 μA at VWM) and is preferred for DC-biased lines such as 12 V power rails or sensor supply outputs.
SM15T33AHM3/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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SM15T33AHM3/H FAQ
1.How can I place an order for SM15T33AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33AHM3/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 SM15T33AHM3/H reliable?
The price and inventory of SM15T33AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T33AHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T33AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33AHM3/H?
SM15T33AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33AHM3/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 SM15T33AHM3/H?
For technical support, including SM15T33AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33AHM3/H requirements.
6.How does Aetrix verify that SM15T33AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T33AHM3/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 SM15T33AHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T33AHM3/H?
All SM15T33AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33AHM3/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 SM15T33AHM3/H part is unused and in its original packaging.
Return procedure for SM15T33AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33AHM3/H Tags
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