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Vishay General Semiconductor - Diodes Division SMCJ33AHM3_A/I
- Part No.:
- SMCJ33AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33AHM3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,395
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Product details
Overview
SMCJ33AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 33 V standoff voltage, 53.3 V clamping voltage at 28.1 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power electronics.
For engineers reviewing the SMCJ33AHM3_A/I datasheet, SMCJ33AHM3_A/I pinout, SMCJ33AHM3_A/I application, or SMCJ33AHM3_A/I equivalent, key selection criteria include unidirectional polarity, 1500 W 10/1000 μs surge capability, 33 V working voltage, AEC-Q101 qualification status, halogen-free RoHS compliance, and SMC package thermal performance under PCB copper pad constraints.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 33 V reverse standoff voltage (VWM), then rapidly avalanches to limit transient voltages to ≤53.3 V at 28.1 A (10/1000 μs waveform). Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance.
Designed for automated SMT assembly, it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and supports operation from –55 °C to +150 °C junction temperature.
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 mA test current, defining turn-on threshold |
| VC @ IPPM | 53.3 V - Clamped voltage seen by protected circuit during full 28.1 A 10/1000 μs surge |
| PPPM | 1500 W - Peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | 1.0 μA - Reverse leakage current at rated standoff voltage, ensuring minimal standby power loss |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ33AHM3_A/I uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode marked by a band on one end. The package features matte tin-plated leads, glass passivation, and UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path; conducts avalanche current during overvoltage events |
| Anode | Protected line connection | Connected to input/power/signal line requiring clamping; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains without compromising surge robustness |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot across protected devices, reducing risk of downstream IC damage |
| MSL Level 1 moisture sensitivity | Enables standard reflow soldering without baking, supporting high-volume automated manufacturing |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V power rails in vehicle ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and DC-DC converter input. Use Value: Limits transient voltage to ≤53.3 V during 1500 W surges, preventing latch-up or gate oxide failure in downstream regulators. | Use Scenario: Surge suppression on motor controller DC bus inputs exposed to inductive kickback from contactors or relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on high-side power rail prior to gate driver and MCU power supplies. Use Value: Absorbs 28.1 A peak current at 10/1000 μs, maintaining system uptime during frequent switching cycles in factory automation. |
| Telecom Power Supply Inputs | Automotive Sensor Signal Lines |
Use Scenario: Input-stage protection for AC/DC adapters and PoE injectors subjected to lightning-induced surges on primary side. IC Role / Device Role / Timing Role: First-line transient suppressor on bulk capacitor input, coordinated with MOV and fuse. Use Value: Fast response time and low clamping voltage preserve upstream rectifier and transformer insulation integrity during repeated 1 kV surges. | Use Scenario: ESD and surge protection for LIN/CAN transceiver signal pins and analog sensor outputs (e.g., pressure, temperature). IC Role / Device Role / Timing Role: Localized TVS placed directly at connector or IC pad to minimize trace inductance. Use Value: 1.0 μA leakage at 33 V ensures no signal offset or bias error in precision 0–5 V sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33AHE3_A/I | Lower PPPM (400 W), smaller SMA package, same VWM and VC | Not suitable for 1500 W surge events; limited to lower-energy IEC 61000-4-2 ESD or small-signal line protection | Select only when board space is constrained and surge threat level is ≤400 W |
| SMCJ33AHE3_A/I | Same electrical specs but RoHS-compliant commercial grade (non-halogen-free), not AEC-Q101 qualified | Lacks automotive qualification; acceptable for industrial or consumer-grade power supplies | Choose for cost-sensitive non-automotive designs where halogen-free requirement is waived |
Compared with SMCJ33AHM3_A/I, SMAJ33AHE3_A/I offers reduced surge handling in a smaller footprint, while SMCJ33AHE3_A/I provides identical clamping performance without halogen-free or automotive qualification-enabling trade-offs between compliance, reliability, and cost based on end-equipment requirements.
Availability
SMCJ33AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom power supply inputs, and automotive sensor signal line protection requiring stable component supply across production lifecycles.
Supply support for SMCJ33AHM3_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-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against repetitive surge stress and long-term stability are critical design requirements.
FAQ
What is the clamping voltage of SMCJ33AHM3_A/I at its rated peak pulse current?
The SMCJ33AHM3_A/I has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 28.1 A under the standard 10/1000 μs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on the protected circuit during surge events, ensuring downstream components remain within safe operating limits. The SMCJ33AHM3_A/I maintains this clamping performance across its specified temperature range.
Is SMCJ33AHM3_A/I qualified for automotive applications?
Yes, SMCJ33AHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code. This qualification confirms that the device has passed stress tests for high-reliability automotive use, including temperature cycling, humidity bias, and surge endurance. The SMCJ33AHM3_A/I is suitable for under-hood and chassis-mounted applications where junction temperatures reach up to +150 °C and exposure to load dump transients is expected.
What does the "HM3" suffix mean in SMCJ33AHM3_A/I?
The "HM3" suffix in SMCJ33AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free materials, and "3" confirms RoHS compliance. This distinguishes it from commercial variants like "E3" (RoHS only) or "HE3" (AEC-Q101 + RoHS, but not halogen-free). The SMCJ33AHM3_A/I meets strict environmental and reliability standards required by Tier 1 automotive suppliers.
How does SMCJ33AHM3_A/I differ from bidirectional SMCJ33CA variants?
SMCJ33AHM3_A/I is unidirectional, meaning it conducts only in reverse bias (cathode-to-anode) during clamping and blocks forward current beyond ~3.5 V. In contrast, SMCJ33CA is bidirectional and symmetrical, clamping in both directions with identical VBR and VC characteristics. The SMCJ33AHM3_A/I is used where polarity is known and forward conduction must be avoided-such as DC power rail protection-while SMCJ33CA suits AC lines or differential signal pairs where polarity reversal may occur.
What is the thermal resistance of SMCJ33AHM3_A/I from junction to ambient?
The typical thermal resistance from junction to ambient air (RθJA) for SMCJ33AHM3_A/I is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes no additional heatsinking and defines the temperature rise above ambient per watt of steady-state power dissipation. For pulsed operation, transient thermal impedance data (Fig. 5 in the datasheet) governs short-duration surge heating, and the SMCJ33AHM3_A/I's RθJL of 15 °C/W supports efficient heat transfer to PCB copper.
SMCJ33AHM3_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:
- 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:
- 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)
SMCJ33AHM3_A/I FAQ
1.How can I place an order for SMCJ33AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33AHM3_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 SMCJ33AHM3_A/I reliable?
The price and inventory of SMCJ33AHM3_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 SMCJ33AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ33AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33AHM3_A/I?
SMCJ33AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33AHM3_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 SMCJ33AHM3_A/I?
For technical support, including SMCJ33AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ33AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ33AHM3_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 SMCJ33AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ33AHM3_A/I?
All SMCJ33AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33AHM3_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 SMCJ33AHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ33AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33AHM3_A/I Tags
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