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Vishay General Semiconductor - Diodes Division SM15T33AHM3_A/H
- Part No.:
- SM15T33AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33AHM3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,587
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Product details
Overview
SM15T33AHM3_A/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), and clamping voltage of 45.7 V at 33 A peak pulse current - used to protect automotive sensor signal lines, industrial I/O ports, and MOSFET gate drivers against lightning-induced and switching transients.
For engineers reviewing the SM15T33AHM3_A/H datasheet, SM15T33AHM3_A/H pinout, SM15T33AHM3_A/H application, or SM15T33AHM3_A/H equivalent, key selection criteria include verified clamping performance at 33 A, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJL = 15 °C/W) for high-reliability board-level surge protection.
Technical Context
The SM15T33AHM3_A/H employs a glass-passivated silicon junction optimized for low-inductance transient suppression with fast response (<1 ns) to ESD and surge events. Its unidirectional polarity features a cathode band marking and operates with reverse-biased clamping action during overvoltage conditions.
Designed for high-source-impedance circuits, it sustains 200 A non-repetitive forward surge current (IFSM, 10 ms half-sine) and derates linearly above 25 °C ambient per Fig. 2, maintaining safe operation up to TJ = 150 °C with RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - maximum continuous reverse operating voltage before clamping begins; defines minimum system operating margin. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - precise voltage threshold where avalanche conduction initiates under controlled test conditions. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 33 A (10/1000 μs) - maximum voltage seen by protected circuit during worst-case surge event. |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capability for standardized lightning/surge waveforms; determines survivability under IEC 61000-4-5 Level 4. |
| TJ max. | 150 °C - maximum junction temperature; sets thermal design limits for PCB layout and power cycling reliability. |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper, critical for repeated surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt current to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| 1500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive front-end interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream ICs - e.g., ensures <46 V exposure to 3.3 V or 5 V logic inputs. |
| Low inductance construction | Reduces voltage overshoot during fast-rising transients (e.g., EFT bursts), preserving clamping accuracy. |
| Halogen-free & RoHS-compliant | Complies with EU Directive 2011/65/EU and IPC-1752A material declaration requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching sensitive input pins. Use Value: Limits voltage to ≤45.7 V during 33 A surges, preventing latch-up or oxide breakdown in automotive-grade microcontrollers and analog front-ends. |
Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (e.g., relay coil de-energization). IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point, upstream of optocoupler or level-shifter. Use Value: Withstands 1500 W pulses without degradation, enabling >100,000 surge cycles in factory automation environments per AEC-Q101 lifetime testing. |
| MOSFET Gate Driver Protection | Telecom Line Interface Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drive signals in motor control inverters against Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-clamping TVS connected between gate and source to suppress dv/dt-induced ringing exceeding VGS(max). Use Value: Sub-1 ns response time and 15 °C/W RθJL allow rapid thermal dissipation, avoiding gate oxide failure during repetitive 20 kHz switching events. |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage clamping device on differential pair, referenced to local ground plane with minimal loop area. Use Value: 45.7 V clamping at 33 A ensures compliance with GR-1089-CORE Level 3 (4 kV/2 Ω) telecom surge standards. |
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), higher VC (53.3 V at 7.5 A), SMA package (smaller footprint, higher RθJA = 100 °C/W) | Rated for lighter-duty consumer electronics; insufficient for IEC 61000-4-5 Level 4 or automotive load dump. | Select when space-constrained and surge threat is limited to ESD or low-energy transients. |
| 1.5KE33A | Through-hole DO-201 package, identical electrical specs (VWM = 28.2 V, VC = 45.7 V @ 33 A), but no AEC-Q101 qualification or halogen-free certification | Lacks automotive qualification and modern environmental compliance; not suitable for OEM automotive BOMs. | Choose only for legacy through-hole designs where rework to SMD is impractical and AEC-Q101 is not required. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, SM15T33AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge rating, and SMC package thermal performance - making it the only option qualified for next-generation automotive and industrial safety-critical interfaces.
Availability
SM15T33AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM15T33AHM3_A/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 power MOSFETs with emphasis on reliability and application-specific performance.
The SM15T Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of SM15T33AHM3_A/H at its rated peak pulse current?
The SM15T33AHM3_A/H has a maximum clamping voltage (VC) of 45.7 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 33 A. This value is measured under standardized test conditions per JEDEC and is guaranteed across the full operating temperature range of -65 °C to +150 °C. The SM15T33AHM3_A/H maintains this clamping performance due to its low-inductance SMC package and glass-passivated junction.
Is SM15T33AHM3_A/H qualified for automotive applications?
Yes, SM15T33AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per the AEC-Q101 standard - making it suitable for engine control units, ADAS sensors, and body electronics.
What does the "_A/H" suffix mean in SM15T33AHM3_A/H?
The "_A/H" suffix in SM15T33AHM3_A/H denotes the revision code and packaging format: "A" indicates the revision level per Vishay's internal document control, and "H" specifies the preferred package code for 7-inch plastic tape-and-reel delivery (850 units per reel). This matches the ordering information table in Document Number 88380, confirming commercial and automotive-grade traceability.
How does SM15T33AHM3_A/H differ from the non-AEC-Q101 SM15T33A-E3/57T?
SM15T33AHM3_A/H differs from SM15T33A-E3/57T in three verified aspects: (1) AEC-Q101 qualification status, (2) halogen-free material composition (per JESD201 Class 2), and (3) HM3 suffix indicating automotive-grade screening and traceability. Electrically and thermally, both share identical VWM, VBR, VC, and RθJL values - but only SM15T33AHM3_A/H is approved for automotive OEM production.
What is the thermal resistance from junction to lead (RθJL) for SM15T33AHM3_A/H?
The SM15T33AHM3_A/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 Number 88380. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the SMC package leads, supporting reliable operation under repetitive surge conditions without thermal runaway.
SM15T33AHM3_A/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:
- 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/H FAQ
1.How can I place an order for SM15T33AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33AHM3_A/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_A/H reliable?
The price and inventory of SM15T33AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SM15T33AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33AHM3_A/H?
SM15T33AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33AHM3_A/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_A/H?
For technical support, including SM15T33AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33AHM3_A/H requirements.
6.How does Aetrix verify that SM15T33AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T33AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SM15T33AHM3_A/H?
All SM15T33AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SM15T33AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33AHM3_A/H Tags
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