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Vishay General Semiconductor - Diodes Division SMCJ33CAHE3_A/H
- Part No.:
- SMCJ33CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAHE3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
SMCJ33CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 33 V standoff voltage (VWM), 53.3 V clamping voltage (VC) at 28.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ33CAHE3_A/H datasheet, SMCJ33CAHE3_A/H pinout, SMCJ33CAHE3_A/H application, or SMCJ33CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low thermal resistance (RθJL = 15 °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 voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD. Its glass-passivated junction ensures stable breakdown behavior, while bidirectional symmetry enables protection on AC-coupled or floating signal paths without polarity concerns.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and delivers consistent clamping across -55 °C to +150 °C operating junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse working voltage before clamping initiates |
| VC @ IPPM | 53.3 V - clamped voltage during 28.1 A 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient energy absorption capability under standardized surge waveform |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance enabling efficient heat transfer to PCB copper |
| TJ max. | +150 °C - maximum junction temperature rating supporting under-hood automotive use |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Acts as cathode during positive transients; forms symmetrical clamping path with cathode terminal |
| Cathode | Transient current sink (bidirectional) | Acts as anode during negative transients; completes bidirectional clamping loop with anode terminal |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC, differential, or floating lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive-grade reliability including high-temp operation and mechanical robustness |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| Low RθJL (15 °C/W) | Reduces thermal derating impact during repetitive surge events in enclosed enclosures |
| MSL Level 1 rating | Supports standard lead-free reflow profiles without moisture-related popcorning risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between VBAT and GND, activated only during overvoltage events >33 V. Use Value: Limits rail voltage to ≤53.3 V during 28.1 A surges, preventing latch-up or gate oxide damage in downstream logic. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamp on differential sensor outputs (e.g., RS-485, analog ±10 V) exposed to ESD and cable discharge events. Use Value: Symmetric clamping preserves signal integrity during ±8 kV contact ESD (IEC 61000-4-2) without polarity biasing components. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection on AC/DC converter inputs in telecom base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt suppressor across bridge rectifier output, coordinated with MOVs for multi-stage protection. Use Value: Fast response (<1 ps) and low clamping voltage reduce stress on bulk capacitors and primary-side controllers during 10/1000 µs surges. | Use Scenario: Secondary-side DC bus protection in USB-C PD adapters handling variable 5–20 V outputs. IC Role / Device Role / Timing Role: Bidirectional clamp on regulated output rail to absorb feedback-loop instability spikes and hot-plug transients. Use Value: 33 V VWM aligns with 20 V PD3.0 max output; 53.3 V VC ensures safe margin below 60 V-rated secondary-side MOSFETs and capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC33CA | Lower PPPM (600 W), same VWM/VC, smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is Class B/C only |
| SMCJ33CAHM3_A/H | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | No functional difference; required only for halogen-free compliance mandates | Choose when RoHS + halogen-free certification (e.g., IEC 61249-2-21) is contractually required |
Compared with SMCJ33CAHE3_A/H, SAC33CA trades surge capacity for footprint reduction, while SMCJ33CAHM3_A/H maintains full equivalence except for halogen content - making the HE3 version optimal for general automotive and industrial designs where halogen-free is not mandated.
Availability
SMCJ33CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line cards, and consumer power adapters requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCJ33CAHE3_A/H 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 automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive power systems, industrial controls, and infrastructure equipment demanding AEC-Q101 validation and 1500 W surge capability.
FAQ
What is the clamping voltage of SMCJ33CAHE3_A/H at its rated peak pulse current?
The SMCJ33CAHE3_A/H has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current (IPPM) of 28.1 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating limits during surge events. The SMCJ33CAHE3_A/H achieves this clamping performance while maintaining bidirectional symmetry and AEC-Q101 qualification.
Is SMCJ33CAHE3_A/H suitable for automotive applications?
Yes, SMCJ33CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It supports operating junction temperatures from -55 °C to +150 °C, withstands reflow up to 260 °C (MSL Level 1), and is validated for mechanical shock, temperature cycling, and HTRB. The SMCJ33CAHE3_A/H is commonly deployed in body control modules, ADAS camera power supplies, and infotainment system interfaces.
How does the bidirectional configuration of SMCJ33CAHE3_A/H affect its PCB layout?
The SMCJ33CAHE3_A/H has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Layout requires symmetric 8.0 mm × 8.0 mm copper pads per terminal per Vishay's recommended footprint, with no need for cathode band alignment or directional routing. This simplifies layout for differential buses, AC-coupled signals, or floating grounds where polarity reversal could occur - a key advantage of the SMCJ33CAHE3_A/H over unidirectional variants.
What is the thermal resistance from junction to lead (RθJL) for SMCJ33CAHE3_A/H?
The SMCJ33CAHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Vishay datasheet. This low value enables effective heat conduction from the silicon die to the PCB copper through the leads, reducing thermal derating under repetitive surge conditions. When designing with the SMCJ33CAHE3_A/H, this RθJL supports reliable operation even in thermally constrained enclosures, provided minimum pad dimensions are maintained.
Can SMCJ33CAHE3_A/H replace a unidirectional TVS like SMCJ33AHE3_A/H in an existing design?
No - SMCJ33CAHE3_A/H is bidirectional and lacks polarity marking, whereas SMCJ33AHE3_A/H is unidirectional with a cathode band. Substituting them requires verifying that the circuit does not rely on forward conduction (e.g., DC bias paths) and that clamping symmetry is acceptable. The SMCJ33CAHE3_A/H may be used in place of SMCJ33AHE3_A/H only if the protected node is floating or AC-coupled; otherwise, reverse leakage or unintended conduction could occur. Always validate with actual surge testing.
SMCJ33CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ33CAHE3_A/H FAQ
1.How can I place an order for SMCJ33CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAHE3_A/H 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 SMCJ33CAHE3_A/H reliable?
The price and inventory of SMCJ33CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ33CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ33CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAHE3_A/H?
SMCJ33CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAHE3_A/H 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 SMCJ33CAHE3_A/H?
For technical support, including SMCJ33CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ33CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAHE3_A/H 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 SMCJ33CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ33CAHE3_A/H?
All SMCJ33CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAHE3_A/H, 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 SMCJ33CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ33CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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