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Vishay General Semiconductor - Diodes Division 1.5SMC33AHE3/9AT
- Part No.:
- 1.5SMC33AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33AHE3/9AT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,519
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Product details
Overview
1.5SMC33AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), clamps to ≤45.7 V at 32.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC33AHE3/9AT datasheet, 1.5SMC33AHE3/9AT pinout, 1.5SMC33AHE3/9AT application, or 1.5SMC33AHE3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.62), and thermal resistance (RθJA = 75 °C/W) for board-level surge resilience.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltages exceeding its reverse stand-off voltage (28.2 V). Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable performance across -65 °C to +150 °C junction temperature range.
Designed for unidirectional protection only, it exhibits 1.0 µA max reverse leakage at VWM, 1000 W minimum peak pulse power derating above 25 °C, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise voltage threshold where clamping begins under controlled test conditions |
| VWM | 28.2 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | ≤45.7 V at 32.8 A - clamped voltage during 1500 W transient, determining protected circuit's worst-case stress level |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity for lightning/inductive switching transients |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB copper pad layout and power derating |
| TJ max | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
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 indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; not active during normal reverse-biased TVS operation |
| Cathode | Current exit terminal during clamping | Connected to higher-potential side (e.g., VCC rail or signal line); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24 V systems |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers or microcontrollers |
| MSL Level 1 rating | Allows direct placement on PCB without baking, supporting high-throughput SMT manufacturing |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal cycling and humidity |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) in vehicle cabin temperature sensors exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching ADC front-end or op-amp buffer. Use Value: Limits induced voltage to ≤45.7 V during 32.8 A surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input channels on programmable logic controller (PLC) modules connected to 24 V field wiring subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff-mode protector on each discrete input channel, absorbing repetitive 1500 W transients without degradation. Use Value: Maintains <1 µA leakage at 28.2 V, ensuring clean logic thresholds while surviving >1000 surges per IEC 61000-4-4 testing. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE-powered Ethernet switches subjected to lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to local ground plane, coordinated with primary-side MOVs for staged protection. Use Value: Fast <1 ns response ensures clamping initiates before transient propagates to PHY ICs, reducing bit error rate in Gigabit links. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Mounted across motor terminals or between H-bridge supply and ground to absorb inductive energy during PWM switching. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), preventing failure during stall-current events and extending system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52T | Same VWM (28.2 V) and VC (45.7 V), but lower PPPM = 600 W in SMB (DO-214AA) package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when space-constrained layouts prioritize smaller footprint over 1500 W capability |
| 1.5KE33A | Through-hole TO-204AE (DO-41) package; identical electrical specs but no AEC-Q101 qualification | Not approved for automotive use; requires wave-solder or hand-solder process | Choose for cost-sensitive industrial prototypes where AEC-Q101 is not mandated |
Compared with SMBJ33A-E3/52T and 1.5KE33A, the 1.5SMC33AHE3/9AT uniquely combines 1500 W surge rating, AEC-Q101 qualification, and SMC surface-mount packaging - making it the only option qualified for production automotive electronics requiring both high-power clamping and automated assembly.
Availability
1.5SMC33AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC33AHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, 1500 W surge handling, and SMT manufacturability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC33AHE3/9AT under maximum rated surge current?
The 1.5SMC33AHE3/9AT clamps to a maximum of 45.7 V when subjected to its peak pulse current of 32.8 A (10/1000 µs waveform). This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components like microcontrollers or transceivers remain within absolute maximum ratings.
Is the 1.5SMC33AHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC33AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It has undergone rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under thermal and electrical stress is essential.
What does the "9AT" suffix indicate in the 1.5SMC33AHE3/9AT part number?
The "9AT" suffix denotes a 13-inch diameter plastic tape-and-reel packaging format containing 3500 units per reel. This configuration supports high-volume automated pick-and-place assembly and is compatible with standard SMT feeders - distinct from the "57T" variant (7-inch reel, 850 units) used for prototyping or low-volume production runs.
How does the 1.5SMC33AHE3/9AT differ from bidirectional TVS diodes like 1.5SMC33CA?
The 1.5SMC33AHE3/9AT is unidirectional and features a cathode band marking; it conducts only during reverse overvoltage events and blocks forward current. In contrast, 1.5SMC33CA is bidirectional with symmetrical clamping in both polarities and no polarity marking - used where AC signals or differential lines require protection without polarity constraints, such as RS-485 or antenna feeds.
What is the maximum operating junction temperature for the 1.5SMC33AHE3/9AT?
The 1.5SMC33AHE3/9AT has a maximum junction temperature (TJ) of +150 °C, verified per JEDEC standards. This rating allows reliable operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures - provided PCB thermal design maintains junction-to-ambient resistance within derated limits per Figure 2 of the datasheet.
1.5SMC33AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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):
- 32.8A
- 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)
1.5SMC33AHE3/9AT FAQ
1.How can I place an order for 1.5SMC33AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33AHE3/9AT 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 1.5SMC33AHE3/9AT reliable?
The price and inventory of 1.5SMC33AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC33AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33AHE3/9AT?
1.5SMC33AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33AHE3/9AT 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 1.5SMC33AHE3/9AT?
For technical support, including 1.5SMC33AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC33AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33AHE3/9AT 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 1.5SMC33AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC33AHE3/9AT?
All 1.5SMC33AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33AHE3/9AT, 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 1.5SMC33AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC33AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33AHE3/9AT Tags
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