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Vishay General Semiconductor - Diodes Division SM15T33A-M3/57T
- Part No.:
- SM15T33A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33A-M3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
SM15T33A-M3/57T 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), 33 V standoff voltage (VWM = 28.2 V), 45.7 V clamping voltage at 33 A IPPM, and 150 °C max junction temperature. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T33A-M3/57T datasheet, SM15T33A-M3/57T pinout, SM15T33A-M3/57T application, or SM15T33A-M3/57T equivalent, key selection criteria include clamping voltage under 46 V at 33 A, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and SMC package suitability for automated placement on industrial and automotive PCBs.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 31.4 V (min VBR), it avalanches to divert surge current away from downstream ICs. Its low 15 °C/W junction-to-lead thermal resistance enables effective heat dissipation during 10 ms IFSM surges up to 200 A.
Designed for high-threat environments, it meets MSL level 1 (260 °C reflow peak) and supports bidirectional variants via CA suffix - though SM15T33A-M3/57T itself is unidirectional with explicit cathode identification. Clamping performance is specified per JEDEC-standard 10/1000 μs waveform under defined pad layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for protected line's normal operating range |
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - breakdown threshold range defining turn-on consistency across production lots |
| VC @ IPPM | 45.7 V at 33 A - clamping voltage during 10/1000 μs surge; determines worst-case overvoltage seen by protected device |
| PPPM | 1500 W - peak pulse power handling capacity; defines survivability against lightning-induced or motor-switching transients |
| TJ max | 150 °C - maximum junction temperature; constrains thermal design margin when mounted on 8 mm × 8 mm copper pads |
| RθJL | 15 °C/W - junction-to-lead thermal resistance; enables estimation of temperature rise under sustained surge duty cycles |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by molded band on case body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to ground or low-impedance return plane; must handle full IPPM during clamping |
| Cathode | Reverse voltage sensing / avalanche conduction node | Marked with band; connected to protected line; voltage referenced to anode during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges without derating in standard PCB layouts |
| Glass passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime; critical for automotive reliability |
| Low inductance construction | Minimizes voltage overshoot during fast-rising transients (<10 ns), improving clamping fidelity |
| MSL level 1 rating (260 °C peak) | Supports single-pass lead-free reflow assembly without popcorn or delamination risk |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensors in engine control modules exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp transients before they reach IC input pins. Use Value: Limits voltage to ≤45.7 V during 33 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs. | Use Scenario: Safeguarding PLC analog input channels connected to 4–20 mA current loops driving solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line to absorb switching spikes from inductive loads without affecting DC loop accuracy. Use Value: Maintains 28.2 V standoff while clamping to 45.7 V, preserving signal integrity below ADC reference thresholds. |
| Telecom Power Interface | Consumer Power Adapter ESD |
Use Scenario: Secondary-side surge protection on 12 V/24 V telecom power rails feeding baseband processors and RF front-ends. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC supply rail upstream of LDOs and PMICs. Use Value: Absorbs 1500 W pulses without failure, ensuring system-level immunity to IEC 61000-4-5 Level 4 surges. | Use Scenario: Input-stage protection for USB-C PD controllers and AC/DC adapter feedback circuits. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor on VBUS or feedback sense line to prevent ESD-induced reset or brownout. Use Value: Sub-50 V clamping at 33 A ensures safe operation of 3.3 V microcontrollers and optocouplers in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | 600 W PPPM, same VWM/VBR/VC, SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for lightning-level threats per IEC 61000-4-5 | Select when board space is constrained and surge threat level is <1 kV/2 Ω |
| SMCJ33A-M3/57T | 1500 W PPPM, identical electrical specs, same SMC package but non-halogen-free (E3 suffix) | Same clamping and thermal performance; lacks halogen-free certification required for some automotive OEMs | Choose if halogen-free compliance is not mandated and cost optimization is prioritized |
Compared with SMAJ33A-E3/57T and SMCJ33A-M3/57T, SM15T33A-M3/57T uniquely delivers 1500 W surge capability in a halogen-free, AEC-Q101-compatible SMC package - making it the only option among the three qualified for high-reliability automotive power-line protection where both environmental compliance and lightning immunity are mandatory.
Availability
SM15T33A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive I/O interfaces, and telecom power rails requiring stable component supply with halogen-free compliance and AEC-Q101 readiness.
Supply support for SM15T33A-M3/57T 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 handling, and automotive qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial automation I/O protection, and telecom infrastructure where 1500 W surge immunity and MSL-1 reflow compatibility are essential.
FAQ
What is the clamping voltage of SM15T33A-M3/57T at its rated peak pulse current?
The SM15T33A-M3/57T has a maximum clamping voltage (VC) of 45.7 V at 33 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T33A-M3/57T suitable for automotive applications?
Yes, SM15T33A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified SM15T family. While the base part number SM15T33A-M3/57T itself carries commercial-grade qualification, Vishay offers AEC-Q101 versions under HM3 suffixes (e.g., SM15T33AHM3_A/H); users requiring certified automotive grade should select those variants.
What does the "M3" suffix indicate in SM15T33A-M3/57T?
The "M3" suffix in SM15T33A-M3/57T denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It distinguishes this variant from E3 (RoHS-compliant but not halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) versions, confirming compliance with environmental standards for industrial and consumer applications.
How does SM15T33A-M3/57T differ from SMAJ33A in terms of surge capability?
SM15T33A-M3/57T delivers 1500 W peak pulse power (PPPM) in an SMC package, whereas SMAJ33A is rated for 600 W in the smaller SMA package. The higher PPPM allows SM15T33A-M3/57T to withstand more severe transients such as lightning-induced surges, while SMAJ33A is limited to lower-energy threats like ESD or local switching noise.
What is the thermal resistance from junction to ambient for SM15T33A-M3/57T?
The typical junction-to-ambient thermal resistance (RθJA) of SM15T33A-M3/57T is 75 °C/W when mounted on standard 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads. This value assumes no additional heatsinking and is used to estimate steady-state temperature rise under DC power dissipation - though the device is primarily intended for transient, not continuous, power handling.
SM15T33A-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T33A-M3/57T FAQ
1.How can I place an order for SM15T33A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33A-M3/57T 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 SM15T33A-M3/57T reliable?
The price and inventory of SM15T33A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T33A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T33A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33A-M3/57T?
SM15T33A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33A-M3/57T 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 SM15T33A-M3/57T?
For technical support, including SM15T33A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33A-M3/57T requirements.
6.How does Aetrix verify that SM15T33A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T33A-M3/57T 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 SM15T33A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T33A-M3/57T?
All SM15T33A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33A-M3/57T, 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 SM15T33A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T33A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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