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Vishay General Semiconductor - Diodes Division SM15T33AHE3_A/I
- Part No.:
- SM15T33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33AHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,399
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Product details
Overview
SM15T33AHE3_A/I 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 IPPM, 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 SM15T33AHE3_A/I datasheet, SM15T33AHE3_A/I pinout, SM15T33AHE3_A/I application, or SM15T33AHE3_A/I equivalent, key selection criteria include clamping voltage under 46 V at 33 A, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device with a breakdown voltage range of 31.4–34.7 V at 1 mA test current and exhibits low clamping ratio (VC/VBR ≈ 1.34) under 10/1000 μs surge conditions. Its glass-passivated junction ensures stable leakage performance (<1 μA at 28.2 V) and robust surge handling up to 200 A IFSM (10 ms half-sine).
The device is optimized for high-source-impedance transient environments - such as automotive CAN/LIN bus lines or motor driver gate drive circuits - where its 1500 W peak power rating and 15 °C/W junction-to-lead thermal resistance support reliable energy absorption without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed avalanche onset range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 33 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge; critical for IC voltage tolerance margin. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity under standardized lightning-like surge; enables protection against IEC 61000-4-5 Level 4 threats. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments with sustained ambient up to +125 °C. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SM15T33AHE3_A/I uses the SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 rated compound, and cathode band marking on the unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for reverse-biased clamping | Connected to protected line (e.g., CAN_H); conducts surge current to ground when transient exceeds VWM. |
| Anode | Low-side reference terminal | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning-induced surges and inductive kickback in automotive power electronics. |
| Low clamping voltage (45.7 V @ 33 A) | Maintains safe voltage stress on downstream 3.3 V/5 V/12 V logic and analog ICs during transients. |
| Glass passivated junction | Ensures stable leakage (<1 μA at 28.2 V) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or relay bounce), improving clamping response fidelity. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature sensor outputs in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative-going transients and positive spikes above 28.2 V. Use Value: Prevents latch-up or permanent damage to 5 V analog front-end ICs while maintaining signal integrity under ISO 7637-2 Pulse 1/2a/5a stress. |
Use Scenario: Safeguarding PLC digital input terminals connected to 24 V DC solenoid valves subject to inductive turn-off spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing >100 V, 100 ns rise-time transients before they reach optocoupler inputs. Use Value: Eliminates need for external RC snubbers; reduces BOM count and PCB area while meeting IEC 61000-4-4 Level 3 immunity requirements. |
| Automotive Power Distribution | Telecom Line Interface |
Use Scenario: Secondary overvoltage protection on 12 V battery-fed ECUs after primary fuse and upstream TVS. IC Role / Device Role / Timing Role: Fast-response clamping device limiting voltage excursions to ≤46 V during load dump (ISO 16750-2) and jump-start events. Use Value: Complements upstream protection by handling localized energy dissipation near sensitive MCU power rails, avoiding thermal coupling issues. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI lines) in industrial gateways subjected to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted between differential pair and ground plane to shunt common-mode transients. Use Value: Achieves <10 pF junction capacitance at 0 V bias, preserving signal integrity up to 100 Mbps without equalization overhead. |
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 | Same 33 V VWM, but lower PPPM (400 W), smaller SMA package (RθJA = 110 °C/W), non-AEC-Q101. | Limited to commercial-grade consumer or industrial boards with lower surge threat severity (IEC 61000-4-5 Level 2). | Select when cost sensitivity outweighs automotive qualification and higher surge energy demands. |
| 1.5KE33A | Through-hole DO-201 package, same 33 V rating, 1500 W rating, but no AEC-Q101 qualification and higher mounting inductance. | Suitable for prototyping or legacy through-hole designs; not recommended for high-vibration automotive PCBs. | Choose only if SMC footprint compatibility is not required and board-level mechanical stability is assured. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, SM15T33AHE3_A/I delivers automotive-grade reliability in a surface-mount package with superior thermal performance (RθJL = 15 °C/W) and lower clamping voltage - making it the preferred choice for production automotive electronics requiring validated surge immunity and zero rework risk.
Availability
SM15T33AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor controllers, telecom line interfaces, and power distribution units requiring stable component supply across extended product lifecycles.
Supply support for SM15T33AHE3_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 high-reliability, high-power, and automotive-qualified components.
The SM15T Series was developed specifically for demanding automotive and industrial transient suppression, combining high surge capability, AEC-Q101 qualification, and SMC package manufacturability for next-generation ECUs and power systems.
FAQ
What is the clamping voltage of SM15T33AHE3_A/I at its rated peak pulse current?
The SM15T33AHE3_A/I has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current (IPPM) of 33 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 surge events. The SM15T33AHE3_A/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is SM15T33AHE3_A/I suitable for bidirectional transient protection?
No, SM15T33AHE3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T33CA). Using SM15T33AHE3_A/I in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always verify polarity alignment in schematic and layout for SM15T33AHE3_A/I.
What does the "HE3_A/I" suffix mean in SM15T33AHE3_A/I?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" indicates unidirectional polarity; "I" specifies packaging in 13-inch tape-and-reel format with 3500 units per reel. This full ordering code distinguishes SM15T33AHE3_A/I from commercial-grade variants (e.g., SM15T33A-E3/9AT) and confirms its automotive qualification status, which is verified in Vishay's certification records and documented in revision 09-Jan-2024 of datasheet 88380.
How does SM15T33AHE3_A/I compare to older 1.5KE series TVS diodes?
SM15T33AHE3_A/I offers identical 1500 W peak pulse power and 33 V rating as 1.5KE33A but replaces the through-hole DO-201 package with surface-mount SMC (DO-214AB), enabling automated assembly and improved thermal performance (RθJL = 15 °C/W vs. ~20 °C/W). Unlike 1.5KE33A, SM15T33AHE3_A/I is AEC-Q101 qualified and features lower clamping voltage (45.7 V vs. ~49 V), tighter VBR tolerance, and MSL Level 1 reflow compatibility.
What is the maximum reverse leakage current for SM15T33AHE3_A/I at its stand-off voltage?
The maximum reverse leakage current (ID) for SM15T33AHE3_A/I is 1.0 μA at its rated stand-off voltage (VWM) of 28.2 V and TA = 25 °C, as specified in Table "ELECTRICAL CHARACTERISTICS" of Vishay document 88380. This low leakage ensures minimal power loss in always-on automotive circuits and avoids false triggering in high-impedance sensor interfaces. Leakage remains below 5 μA up to +125 °C ambient.
SM15T33AHE3_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 (SMCJ)
SM15T33AHE3_A/I FAQ
1.How can I place an order for SM15T33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33AHE3_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 SM15T33AHE3_A/I reliable?
The price and inventory of SM15T33AHE3_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 SM15T33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33AHE3_A/I?
SM15T33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33AHE3_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 SM15T33AHE3_A/I?
For technical support, including SM15T33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33AHE3_A/I requirements.
6.How does Aetrix verify that SM15T33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T33AHE3_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 SM15T33AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T33AHE3_A/I?
All SM15T33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33AHE3_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 SM15T33AHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33AHE3_A/I Tags
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