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Vishay General Semiconductor - Diodes Division SM15T33AHM3_A/I
- Part No.:
- SM15T33AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33AHM3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,478
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Product details
Overview
SM15T33AHM3_A/I from Vishay General Semiconductor is a unidirectional 1500 W Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 33 V standoff voltage (VWM = 28.2 V), 34.7 V minimum breakdown voltage (VBR), and 45.7 V maximum clamping voltage at 33 A peak pulse current. 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 SM15T33AHM3_A/I datasheet, SM15T33AHM3_A/I pinout, SM15T33AHM3_A/I application, or SM15T33AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance under 10/1000 μs waveform, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
The SM15T33AHM3_A/I operates as a unidirectional avalanche diode with glass-passivated junction, optimized for high-energy transient suppression in DC power rails and I/O lines. Its low-inductance SMC package enables fast response to sub-microsecond transients while maintaining stable clamping up to 150 °C junction temperature.
Designed for systems with source impedances limiting peak current within its 33 A IPPM rating (10/1000 μs), it fails short-circuit under overstress-ensuring downstream circuit protection integrity. The device meets MSL Level 1 reflow profile (260 °C peak) and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC bias margin. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 45.7 V at 33 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survival. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity under standard lightning surge waveform; validates robustness vs. IEC 61000-4-5. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8 mm × 8 mm copper pads; determines derating above 25 °C. |
| TJ max. | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes halogen-free AEC-Q101 grade. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit terminal; marked with band | Connected to higher-potential rail (e.g., VBUS); defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates immunity to IEC 61000-4-5 Level 4 surges without degradation when mounted per spec. |
| Glass-passivated chip junction | Ensures stable VBR and low leakage over lifetime; prevents moisture ingress and parametric drift in humid environments. |
| Halogen-free, RoHS-compliant construction | Meets automotive ELV directive and IPC-1752A material declaration requirements; supports green manufacturing. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without popcorn cracking or delamination risk. |
| AEC-Q101 qualification (HM3 suffix) | Confirms suitability for automotive powertrain and body control modules requiring zero-failure field reliability. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load-dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping spikes >40 V to safe levels. Use Value: Limits voltage seen by MCU and CAN transceivers to ≤45.7 V during 33 A surges, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding PLC analog input channels from inductive kickback when solenoids de-energize. IC Role / Device Role / Timing Role: TVS connected across signal line and ground, absorbing 10/1000 μs transients induced by 24 V coil switching. Use Value: Clamps transient excursions to 45.7 V within nanoseconds, preserving ADC accuracy and isolator integrity. |
| Telecom DC Power Rail Protection | Consumer Sensor Signal Line Protection |
Use Scenario: Safeguarding PoE-powered Ethernet switches against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary TVS on main DC input rail upstream of DC/DC converters. Use Value: Absorbs 1500 W surges without failure, maintaining system uptime and avoiding fuse blowouts during field deployment. |
Use Scenario: Guarding I²C lines of automotive cabin sensors (e.g., ambient light, occupancy) against ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on SDA/SCL lines referenced to local ground. Use Value: Provides <1 μA leakage at 28.2 V and fast clamping to protect 3.3 V logic interfaces without signal distortion. |
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 | Lower PPPM (400 W), same VWM (28.2 V), SOD-123 package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer boards; insufficient for automotive load-dump per ISO 7637-2 Pulse 5a. | Select SMAJ33A-E3/57T only for low-energy, non-automotive applications where board area is critical. |
| SMCJ33A-M3/57T | Same PPPM (1500 W), identical VWM/VBR/VC specs, but commercial-grade (non-AEC-Q101), M3 suffix (halogen-free RoHS) | Lacks automotive qualification; acceptable for industrial controls where AEC-Q101 is not mandated. | Choose SMCJ33A-M3/57T for cost-sensitive industrial designs requiring same surge capability without automotive validation. |
Compared with SMAJ33A-E3/57T and SMCJ33A-M3/57T, the SM15T33AHM3_A/I uniquely combines 1500 W surge handling, AEC-Q101 qualification, halogen-free compliance, and SMC package thermal performance-making it the only option qualified for under-hood automotive use with full ISO 7637-2 compliance margin.
Availability
SM15T33AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, telecom power supplies, and consumer sensor modules requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for SM15T33AHM3_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 protection devices 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 applications where failure modes must be controlled and clamping precision is mission-critical.
FAQ
What is the clamping voltage of SM15T33AHM3_A/I at its rated peak pulse current?
The SM15T33AHM3_A/I has a maximum clamping voltage (VC) of 45.7 V at 33 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per Fig. 1 and Table on page 2 of Vishay document 88380, and defines the upper voltage limit imposed on protected circuits during surge events.
Is SM15T33AHM3_A/I qualified for automotive applications?
Yes, SM15T33AHM3_A/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's SM15T Series datasheet (Rev. 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD-making it suitable for under-hood automotive ECUs and body control modules.
What does the "HM3_A/I" suffix mean in SM15T33AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction; "A" indicates unidirectional polarity; "I" specifies 13-inch tape-and-reel packaging with 3500 units per reel. This full suffix confirms compliance with automotive material and packaging standards per Vishay's ordering information table.
How does SM15T33AHM3_A/I differ from SM15T33A-E3/57T?
SM15T33AHM3_A/I is AEC-Q101 qualified and halogen-free (HM3), while SM15T33A-E3/57T is commercial-grade, RoHS-compliant but not automotive-qualified (E3). Both share identical electrical specs and SMC package, but only SM15T33AHM3_A/I meets automotive reliability requirements for production vehicles.
What is the thermal resistance of SM15T33AHM3_A/I, and how does it affect layout?
The SM15T33AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures, PCB layout must replicate this pad area and avoid excessive trace length or isolation that increases thermal impedance.
SM15T33AHM3_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):
- 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_A/I FAQ
1.How can I place an order for SM15T33AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33AHM3_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 SM15T33AHM3_A/I reliable?
The price and inventory of SM15T33AHM3_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 SM15T33AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T33AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33AHM3_A/I?
SM15T33AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33AHM3_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 SM15T33AHM3_A/I?
For technical support, including SM15T33AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33AHM3_A/I requirements.
6.How does Aetrix verify that SM15T33AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T33AHM3_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 SM15T33AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T33AHM3_A/I?
All SM15T33AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33AHM3_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 SM15T33AHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T33AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33AHM3_A/I Tags
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