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Vishay General Semiconductor - Diodes Division SMCJ33CAHE3_A/I
- Part No.:
- SMCJ33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAHE3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,348
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Product details
Overview
SMCJ33CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 33 V standoff voltage, 1500 W peak pulse power rating, and clamping voltage of 53.3 V at 28.1 A IPPM. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ33CAHE3_A/I datasheet, SMCJ33CAHE3_A/I pinout, SMCJ33CAHE3_A/I application, or SMCJ33CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge handling, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its breakdown voltage range is 36.7 V to 40.6 V at 1 mA test current, with maximum reverse leakage of 1.0 μA at 33 V standoff.
The device features glass-passivated junctions, meets MSL Level 1 per J-STD-020, and supports peak surge currents up to 28.1 A under 10/1000 μs waveform conditions when mounted on 8.0 mm × 8.0 mm copper pads. Thermal resistance is 75 °C/W junction-to-ambient and 15 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 36.7–40.6 V at 1 mA - Confirmed conduction threshold ensuring reliable turn-on during overvoltage events |
| Clamping Voltage (VC) | 53.3 V at 28.1 A - Peak voltage seen by protected circuit during full-rated 1500 W transient |
| Peak Pulse Power (PPPM) | 1500 W - Energy-handling capacity for 10/1000 μs surge waveforms per IEEE C62.35 |
| Operating Temperature | −55 °C to +150 °C - Validated performance across automotive and industrial ambient ranges |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with standard reflow profiles and automated placement |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD stress tests |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as cathode or anode depending on instantaneous voltage polarity |
| Case / Body | Non-electrical mechanical interface | Provides thermal path to PCB copper pads; no electrical connection or grounding requirement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded circuits without polarity concerns |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line) surge immunity when properly laid out |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking preconditioning |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 10/1000 μs surges up to 1500 W while meeting AEC-Q101 requirements for 15-year vehicle service life. | Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, coordinated with series current-limiting resistors and optocouplers. Use Value: Limits transient voltage to ≤53.3 V during 28.1 A surges, preventing latch-up or gate oxide damage in downstream logic interfaces. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers in network edge devices from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protection device located at board edge, preceding common-mode chokes and secondary TVS arrays. Use Value: Withstands repeated 1500 W surges while maintaining <1.0 μA leakage at 33 V, preserving signal-to-noise ratio in high-speed data links. | Use Scenario: Suppressing commutation spikes generated by brushed DC motors in smart home appliances such as vacuum cleaners and washing machines. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp back-EMF spikes before they propagate into MCU GPIO and power supply rails. Use Value: Clamps 33 V nominal system spikes to 53.3 V within nanoseconds, eliminating false resets and extending microcontroller lifetime in cost-sensitive consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/61 | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients; not AEC-Q101 qualified | Select when space-constrained and surge energy is limited to IEC 61000-4-5 Level 2 |
| 1.5KE33CA | Through-hole DO-201 package, same VWM/VC but higher parasitic inductance and manual assembly requirement | Used in legacy industrial power supplies where reworkability and thermal mass are prioritized over SMT automation | Choose for prototyping or low-volume repair scenarios where board real estate is not constrained |
Compared with SMAJ33CA-E3/61 and 1.5KE33CA, the SMCJ33CAHE3_A/I delivers 3.75× higher surge power handling, AEC-Q101 certification for automotive use, and optimized thermal performance in SMC package-making it the preferred choice for production-grade, high-reliability SMT designs.
Availability
SMCJ33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, telecom infrastructure, and consumer appliance designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ33CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and communications systems where robustness against lightning, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the SMCJ33CAHE3_A/I under full-rated surge conditions?
The SMCJ33CAHE3_A/I has a maximum clamping voltage (VC) of 53.3 V at 28.1 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 1500 W transient event and is confirmed per ANSI/IEEE C62.35 test methodology. The SMCJ33CAHE3_A/I maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the SMCJ33CAHE3_A/I suitable for automotive applications?
Yes, the SMCJ33CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and ESD qualification-to ensure reliability in engine compartments, body control modules, and ADAS subsystems. The SMCJ33CAHE3_A/I is rated for continuous operation from −55 °C to +150 °C and supports 15-year field deployment in vehicles.
How does the bidirectional configuration of the SMCJ33CAHE3_A/I affect its circuit placement?
The SMCJ33CAHE3_A/I has no polarity marking and functions identically in both directions, allowing direct placement across any two points requiring symmetrical overvoltage protection-such as differential signal pairs (RS-485, CAN), AC power inputs, or ungrounded sensor bridges. Unlike unidirectional TVS diodes, the SMCJ33CAHE3_A/I eliminates orientation errors during automated assembly and avoids the need for dual-device solutions in balanced topologies.
What is the thermal resistance of the SMCJ33CAHE3_A/I, and how does it impact PCB layout?
The SMCJ33CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must replicate this minimum pad area and use internal ground/power planes for heat spreading. The SMCJ33CAHE3_A/I's junction-to-lead resistance (RθJL) is 15 °C/W, supporting effective conduction cooling through solder joints.
Does the SMCJ33CAHE3_A/I meet RoHS and halogen-free compliance requirements?
Yes, the SMCJ33CAHE3_A/I carries the "HE3" suffix indicating RoHS-compliant construction and AEC-Q101 qualification. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). Per Vishay documentation, the molding compound meets UL 94 V-0 flammability rating, and all materials comply with JEDEC JS-001 and JESD201 Class 2 whisker resistance standards.
SMCJ33CAHE3_A/I 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/I FAQ
1.How can I place an order for SMCJ33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAHE3_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 SMCJ33CAHE3_A/I reliable?
The price and inventory of SMCJ33CAHE3_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 SMCJ33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAHE3_A/I?
SMCJ33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAHE3_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 SMCJ33CAHE3_A/I?
For technical support, including SMCJ33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAHE3_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 SMCJ33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ33CAHE3_A/I?
All SMCJ33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAHE3_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 SMCJ33CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33CAHE3_A/I Tags
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