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Vishay General Semiconductor - Diodes Division SMCJ33AHE3/57T
- Part No.:
- SMCJ33AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33AHE3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,564
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Product details
Overview
SMCJ33AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 53.3 V maximum clamping voltage (VC) at 28.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ33AHE3/57T datasheet, SMCJ33AHE3/57T pinout, SMCJ33AHE3/57T application, or SMCJ33AHE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1500 W surge capability, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 33 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR and low incremental surge resistance, enabling consistent clamping performance across repeated surges.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine). Its unidirectional configuration requires cathode-band orientation during PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 53.3 V at 28.1 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on standard PCB pads |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
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. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line ground or low-side reference | Must be routed to lowest-impedance return path to ensure effective clamping during transients |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., 33 V rail) | Orientation-critical: reversal prevents clamping and risks device failure under overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power rails |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 rating | Enables direct placement into standard SMT reflow profiles without baking or special handling |
| 1500 W peak pulse power | Supports robust immunity to ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 33 V supply lines in engine control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp transients within 1 ns response time. Use Value: Limits voltage excursion to ≤53.3 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream DC-DC controllers. | Use Scenario: Safeguarding analog input pins of industrial current sensors exposed to field wiring EMI and cable discharge events. IC Role / Device Role / Timing Role: Standoff-mode protector on signal line, conducting only when transient exceeds 36.7 V. Use Value: Maintains <1 µA leakage at 33 V, preserving sensor accuracy while clamping 28.1 A surges to safe levels for precision amplifiers. |
| Telecom DC Power Input Protection | OEM Motor Drive Gate Driver Protection |
Use Scenario: Securing 48 V telecom rectifier outputs against lightning-induced surges on outdoor cabinet power feeds. IC Role / Device Role / Timing Role: Primary-level TVS on input stage, coordinated with upstream fuses and secondary-stage MOVs. Use Value: Withstands 10/1000 µs surges up to 1500 W and operates reliably from -40 °C to +125 °C ambient. | Use Scenario: Shielding high-side IGBT gate drivers from Miller-induced voltage spikes during fast switching transitions. IC Role / Device Role / Timing Role: Localized clamping device mounted directly at driver output pin to minimize loop inductance. Use Value: 53.3 V clamping voltage ensures gate-source voltage stays below 20 V absolute maximum rating of common gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge margin; suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD, not IEC 61000-4-5) | Select when board space is constrained and surge threat level is limited to Class 3 or below. |
| SMCJ33CAHE3/57T | Bidirectional variant; identical VWM/VBR/VC/PPPM but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose only if bidirectional protection is mandated - unidirectional SMCJ33AHE3/57T offers better cost and layout simplicity for DC rails. |
Compared with SMBJ33AHE3/52T and SMCJ33CAHE3/57T, the SMCJ33AHE3/57T delivers optimal balance of 1500 W surge capacity, AEC-Q101 qualification, and unidirectional efficiency for 33 V DC power rail protection - avoiding unnecessary bidirectional complexity or derated energy handling.
Availability
SMCJ33AHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ33AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and 1500 W surge capability.
FAQ
What is the clamping voltage of the SMCJ33AHE3/57T at its rated peak pulse current?
The SMCJ33AHE3/57T has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 28.1 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-power transient event and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMCJ33AHE3/57T maintains this clamping performance across its specified operating temperature range.
Is the SMCJ33AHE3/57T qualified for automotive applications?
Yes, the SMCJ33AHE3/57T is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number and confirmed in the Vishay datasheet section "Mechanical Data". This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), making the SMCJ33AHE3/57T suitable for under-hood and body-control module applications where reliability under thermal and electrical stress is mandatory.
What does the "57T" suffix mean in SMCJ33AHE3/57T?
The "57T" suffix in SMCJ33AHE3/57T denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format is optimized for high-speed automated SMT placement and is documented in the "Ordering Information" table on page 3 of the Vishay SMCJ5.0A–SMCJ188CA datasheet. The SMCJ33AHE3/57T uses standard SMC (DO-214AB) footprint compatible with industry-standard pick-and-place feeders.
How does the SMCJ33AHE3/57T differ from the bidirectional SMCJ33CAHE3/57T?
The SMCJ33AHE3/57T is unidirectional, with polarity defined by a cathode band, and conducts only during positive transients relative to its anode. In contrast, the SMCJ33CAHE3/57T is bidirectional and clamps symmetrically for both polarities. Both share identical VWM (33 V), VBR (36.7–40.6 V), VC (53.3 V), and PPPM (1500 W), but the SMCJ33AHE3/57T offers lower cost and simpler layout for DC applications where polarity is fixed - a key distinction confirmed in Vishay's "Devices for Bidirection Applications" note.
What is the thermal resistance of the SMCJ33AHE3/57T, and how does it affect PCB layout?
The SMCJ33AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the "Thermal Characteristics" table. This value assumes minimum recommended pad layout; reducing pad area increases RθJA and risks exceeding the +150 °C max junction temperature during repeated surges. Therefore, the SMCJ33AHE3/57T must be placed with full adherence to Vishay's mounting pad dimensions to ensure thermal integrity.
SMCJ33AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ33AHE3/57T FAQ
1.How can I place an order for SMCJ33AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33AHE3/57T 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 SMCJ33AHE3/57T reliable?
The price and inventory of SMCJ33AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ33AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ33AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33AHE3/57T?
SMCJ33AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33AHE3/57T 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 SMCJ33AHE3/57T?
For technical support, including SMCJ33AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33AHE3/57T requirements.
6.How does Aetrix verify that SMCJ33AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ33AHE3/57T 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 SMCJ33AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ33AHE3/57T?
All SMCJ33AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33AHE3/57T, 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 SMCJ33AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ33AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33AHE3/57T Tags
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