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Vishay General Semiconductor - Diodes Division 1.5SMC33AHE3/57T
- Part No.:
- 1.5SMC33AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33AHE3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,767
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Product details
Overview
1.5SMC33AHE3/57T 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 to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5SMC33AHE3/57T datasheet, 1.5SMC33AHE3/57T pinout, 1.5SMC33AHE3/57T application, or 1.5SMC33AHE3/57T equivalent, this AEC-Q101-qualified device offers verified automotive-grade reliability, low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly on industrial and automotive PCBs.
Technical Context
The 1.5SMC33AHE3/57T operates as a unidirectional clamping TVS diode with glass-passivated junction and polarity-indicating cathode band. Its electrical behavior follows standardized IEC 61000-4-5 surge immunity requirements, delivering precise clamping under repetitive 10/1000 µs transients at ≤0.01% duty cycle while maintaining stable VBR temperature coefficient of +0.098%/°C.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C. Mounted on 8.0 mm × 8.0 mm copper pads per terminal, it sustains 200 A non-repetitive forward surge current (IFSM) and dissipates 6.5 W continuously at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at IT = 1 mA - defines precise clamping onset threshold for overvoltage detection |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤45.7 V at 32.8 A - actual clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, validated per Fig. 1 |
| IPPM | 32.8 A - peak pulse current capability under standard surge condition |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 qualified | Yes - certified for automotive applications per stress test requirements including HTOL, TC, HTRB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe IEC 61000-4-5 Level 4 surges without derating in standard layouts |
| Glass passivated chip junction | Ensures long-term stability and low leakage (<1 µA at VWM) across temperature and humidity |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS subsystems |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, inductive kick) |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp spikes above 28.2 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤45.7 V during 1500 W surges. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry to absorb induced lightning surges on 4–20 mA loops. Use Value: Prevents sensor IC damage from >1 kV transients while maintaining <1 µA leakage at 24 V nominal. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power rails and bias supplies in outdoor base stations. IC Role / Device Role / Timing Role: Primary clamping device on 12 V/5 V auxiliary rails exposed to conducted surges via backplane. Use Value: Responds in <1 ns to suppress 10/1000 µs transients before downstream LDOs or regulators fail. |
Use Scenario: Input-stage overvoltage protection for universal-input AC/DC adapters (90–264 VAC). IC Role / Device Role / Timing Role: Secondary TVS after bridge rectifier, clamping rectified DC bus against MOV failure or surge coupling. Use Value: Maintains 28.2 V standoff while surviving repeated 1500 W pulses - extends adapter field life in high-surge regions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Lower PPPM (600 W), same VWM/VBR, SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics where 1500 W margin is not required | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
| 1.5KE33A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Used in legacy industrial power supplies where automated SMT is not available | Choose only for prototyping or non-automated production; lacks automotive qualification and reflow compatibility |
Compared with SMBJ33A-E3/52 and 1.5KE33A, the 1.5SMC33AHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC package thermal performance - making it the preferred choice for automotive and high-reliability industrial designs requiring both robustness and SMT manufacturability.
Availability
1.5SMC33AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC33AHE3/57T 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, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping precision and rugged packaging.
FAQ
What is the clamping voltage of the 1.5SMC33AHE3/57T under maximum surge conditions?
The 1.5SMC33AHE3/57T clamps to a maximum of 45.7 V when subjected to its rated peak pulse current of 32.8 A (10/1000 µs waveform). This value is measured per standard test conditions in the Vishay datasheet (Doc. #88303, page 2) and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC33AHE3/57T suitable for automotive applications?
Yes, the 1.5SMC33AHE3/57T is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation (Rev. 09-Mar-2026, Doc. #88303). It meets stress test requirements for high-temperature operating life, temperature cycling, and highly accelerated life testing - making it approved for use in engine control units, body electronics, and ADAS modules where reliability under thermal and mechanical stress is mandatory.
What does the "HE3/57T" suffix indicate in 1.5SMC33AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification; "57T" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This format ensures compatibility with high-speed pick-and-place equipment and supports traceable, moisture-safe handling per MSL Level 1 (peak reflow temperature 260 °C), as defined in Vishay's ordering information table (page 3 of Doc. #88303).
How does the 1.5SMC33AHE3/57T compare to bidirectional TVS diodes like 1.5SMC33CA?
The 1.5SMC33AHE3/57T is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward protected line). In contrast, 1.5SMC33CA is bidirectional and symmetric - suitable for AC lines or data buses where voltage polarity reverses. The 1.5SMC33AHE3/57T offers tighter VBR tolerance (±5%) and lower leakage at VWM, but cannot replace 1.5SMC33CA in AC-coupled applications without circuit redesign.
What is the thermal resistance and maximum power dissipation of the 1.5SMC33AHE3/57T?
The 1.5SMC33AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. Its steady-state power dissipation is rated at 6.5 W when mounted on infinite heatsink at TA = 50 °C. Derating is required above 50 °C ambient, per Figure 2 in the Vishay datasheet - critical for thermal design in enclosed automotive or industrial enclosures.
1.5SMC33AHE3/57T 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)
1.5SMC33AHE3/57T FAQ
1.How can I place an order for 1.5SMC33AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33AHE3/57T 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 1.5SMC33AHE3/57T reliable?
The price and inventory of 1.5SMC33AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC33AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33AHE3/57T?
1.5SMC33AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33AHE3/57T 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 1.5SMC33AHE3/57T?
For technical support, including 1.5SMC33AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC33AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33AHE3/57T 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 1.5SMC33AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC33AHE3/57T?
All 1.5SMC33AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33AHE3/57T, 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 1.5SMC33AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC33AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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