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Vishay General Semiconductor - Diodes Division SMCJ33CAHM3_A/I
- Part No.:
- SMCJ33CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAHM3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,285
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Product details
Overview
SMCJ33CAHM3_A/I from Vishay General Semiconductor is a bidirectional 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 standoff voltage (VWM), 53.3 V maximum clamping voltage at 28.1 A peak pulse current, and 1500 W peak pulse power dissipation with 10/1000 μs waveform.
For engineers reviewing the SMCJ33CAHM3_A/I datasheet, SMCJ33CAHM3_A/I pinout, SMCJ33CAHM3_A/I application, or SMCJ33CAHM3_A/I equivalent, key selection criteria include bidirectional surge protection capability, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
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 sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive transient events.
The device is rated for operation from −55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 75 °C/W) reflects standard SMC package performance on recommended pad layout, and it is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V - Breakdown occurs within this range at 1.0 mA test current, defining turn-on threshold |
| VC @ IPPM | 53.3 V - Clamped voltage across device at 28.1 A peak pulse current, limiting downstream stress |
| PPPM | 1500 W - Peak transient energy handling capacity with 10/1000 μs waveform |
| ID @ VWM | <1.0 μA - Reverse leakage at standoff voltage, minimizing standby power loss |
| TJ max | +150 °C - Maximum junction temperature, supporting under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint |
Pinout & Package
SMCJ33CAHM3_A/I uses the SMC (DO-214AB) package: a two-terminal surface-mount device with no polarity marking for bidirectional operation. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamping occurs when voltage exceeds ±VBR magnitude |
| Case (cathode band absent) | Mechanical mounting / thermal path | No polarity marking; case serves as thermal interface to PCB copper pad |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global electronics manufacturing |
| Low profile SMC package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment |
| 1500 W peak pulse power | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) |
| Fast response time | Clamps transients within picoseconds, preventing damage to downstream ICs and MOSFETs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground. Use Value: Limits voltage excursions to ≤53.3 V during 1500 W surges, preserving MCU and CAN transceiver integrity. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on differential or single-ended signal traces. Use Value: Sub-1 μA leakage at 33 V standoff preserves signal accuracy; fast clamping prevents ADC saturation. |
| Telecom Interface Port Protection | Consumer Device USB/DisplayPort ESD Hardening |
Use Scenario: Shielding RS-485 transceivers in base station backhaul modules from lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of secondary TVS or filter networks. Use Value: Withstands repeated 10/1000 μs surges up to 28.1 A, maintaining protection margin over product lifetime. | Use Scenario: Adding system-level surge immunity to USB-C or DisplayPort receptacles in laptops and docking stations. IC Role / Device Role / Timing Role: Board-level clamping device on VBUS and auxiliary signal lines. Use Value: Halogen-free construction supports consumer safety standards; SMC footprint enables compact layout near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CAHE3_A/I | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs | 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 2 or lower |
| SMCJ33CA-E3/9AT | Same electrical specs; commercial-grade (non-AEC-Q101), RoHS-compliant but not halogen-free | Approved for industrial/commercial use only; not certified for automotive deployment | Choose for cost-sensitive non-automotive designs where halogen-free requirement is waived |
Compared with SMCJ33CAHM3_A/I, SMAJ33CAHE3_A/I offers reduced surge handling in a smaller footprint, while SMCJ33CA-E3/9AT provides identical protection without automotive qualification or halogen-free assurance-making the original part uniquely suited for AEC-Q101–mandated, environmentally compliant automotive systems.
Availability
SMCJ33CAHM3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom port surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ33CAHM3_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 and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and 1500 W surge capability are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ33CAHM3_A/I?
The "CA" suffix in SMCJ33CAHM3_A/I denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities. This allows it to protect AC-coupled circuits, differential buses, or ungrounded signal lines without regard to polarity-unlike unidirectional variants (e.g., SMCJ33A) that require correct cathode orientation.
Is SMCJ33CAHM3_A/I suitable for automotive applications?
Yes, SMCJ33CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability. It is explicitly intended for use in engine control units, body electronics, and ADAS sensor modules where sustained operation at +150 °C and immunity to load dump transients are required.
What is the clamping voltage of SMCJ33CAHM3_A/I at its rated peak pulse current?
The clamping voltage (VC) of SMCJ33CAHM3_A/I is 53.3 V at its rated peak pulse current (IPPM) of 28.1 A, measured using the standardized 10/1000 μs waveform. This value defines the maximum voltage imposed on protected circuitry during a full-rated surge event.
How does the SMC (DO-214AB) package of SMCJ33CAHM3_A/I affect thermal performance?
The SMC (DO-214AB) package of SMCJ33CAHM3_A/I delivers a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per Vishay's recommended layout. This enables reliable power dissipation up to 6.5 W at TA = 50 °C and supports sustained operation under repeated surge conditions.
Does SMCJ33CAHM3_A/I have polarity markings on the device body?
No, SMCJ33CAHM3_A/I has no polarity markings such as a cathode band because it is a bidirectional TVS diode. The SMC package terminals are functionally identical-voltage clamping occurs symmetrically above ±36.7 V-so orientation during placement has no electrical impact.
SMCJ33CAHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ33CAHM3_A/I FAQ
1.How can I place an order for SMCJ33CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAHM3_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 SMCJ33CAHM3_A/I reliable?
The price and inventory of SMCJ33CAHM3_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 SMCJ33CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ33CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAHM3_A/I?
SMCJ33CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAHM3_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 SMCJ33CAHM3_A/I?
For technical support, including SMCJ33CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ33CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAHM3_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 SMCJ33CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ33CAHM3_A/I?
All SMCJ33CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAHM3_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 SMCJ33CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ33CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33CAHM3_A/I Tags
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