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Vishay General Semiconductor - Diodes Division SMC3K33CAHM3_A/I
- Part No.:
- SMC3K33CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K33CAHM3_A/I.pdf
- Description:
- 3KW, 33V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,494
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Product details
Overview
SMC3K33CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) designed for robust overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 53.3 V under 430 A surge current, and features a 33 V stand-off voltage with 36.7–40.6 V breakdown range. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines against ISO 7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMC3K33CAHM3_A datasheet, SMC3K33CAHM3_A pinout, SMC3K33CAHM3_A application, or SMC3K33CAHM3_A equivalent, key selection criteria include clamping voltage at rated IPPM, bidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification, and compliance with ISO 16750-2 Pulse b and IEC 61000-4-2 ESD (30 kV contact/air).
Technical Context
This TVS diode operates as a voltage-clamping device across power or signal lines, activating when transient voltage exceeds its breakdown threshold (36.7–40.6 V). Its low incremental surge resistance enables rapid energy diversion during 8/20 μs (up to 1000 A) and 10/1000 μs (up to 430 A) pulses while maintaining stable clamping at 53.3 V (10/1000 μs) and 69.8 V (8/20 μs).
It is optimized for automotive load-dump and switching-inductive transient suppression per ISO 16750-2 Pulse b and ISO 7637-2, with thermal resistance RthJA = 90 °C/W and RthJM = 4.0 °C/W, enabling reliable operation up to 175 °C junction temperature in high-reliability PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 33 V - Maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 36.7–40.6 V at 1 mA - Confirmed voltage range where device enters avalanche conduction |
| Clamping Voltage (VC) | 53.3 V at 430 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Sustained surge energy handling capability without failure |
| ESD Rating | ±30 kV per IEC 61000-4-2 (contact/air) - Robust electrostatic discharge immunity for assembly and field use |
| Operating Temperature | −55 °C to +175 °C - Validated junction temperature range for automotive under-hood and industrial environments |
| AEC-Q101 Qualified | Yes - Certified for automotive electronic systems per stress test requirements including HTRB, HTGB, and TCT |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Transient current sink (bidirectional) | No polarity marking on bidirectional types; both terminals function identically as symmetrical clamping nodes |
| Anode (unmarked side) | Transient current sink (bidirectional) | Identical electrical role to cathode; device conducts equally in either direction above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| 30 kW surge rating (8/20 μs) | Supports high-energy lightning-induced surges per IEC 61000-4-5, critical for telecom and EV charging interfaces |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs-e.g., 53.3 V clamp protects 48 V-rated controllers |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules requiring zero-defect field performance |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity concerns-no baking required before assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and inductive switching spikes per ISO 16750-2 Pulse b and ISO 7637-2. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across input rail to shunt surge energy before it reaches DC-DC converters or microcontrollers. Use Value: Clamps to 53.3 V at 430 A, limiting stress on 36 V-rated input stages and preventing latch-up or gate oxide damage in upstream FETs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to MCU ADC inputs in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on differential or single-ended signal lines exposed to relay coil back-EMF or ESD events. Use Value: Sub-1 ns response time and ±30 kV ESD rating ensure signal integrity remains intact during 15 kV ESD gun discharges near sensor harnesses. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Protection |
Use Scenario: Front-end protection for PoE-powered devices and base station interface circuits subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS on Ethernet or RS-485 bus lines, coordinated with secondary GDT or MOV stages. Use Value: 30 kW (8/20 μs) rating handles 10/700 μs telecom surges with margin; 69.8 V clamp preserves 75 V isolation barriers in PoE PD designs. |
Use Scenario: Input-stage overvoltage protection in USB-C PD adapters and smart home power supplies exposed to mains transients. IC Role / Device Role / Timing Role: Secondary clamping device after fuse and MOV, absorbing residual energy that bypasses bulk suppression. Use Value: 3000 W (10/1000 μs) rating absorbs IEC 61000-4-4 EFT bursts without degradation; halogen-free SMC package meets consumer safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 110 °C/W), same VWM/VBR range | Not AEC-Q101 qualified; limited to consumer/industrial non-automotive use | Select when board space is constrained and automotive qualification is unnecessary |
| SMCJ33CA | Same SMC package and AEC-Q101 rating, but 1500 W PPPM (10/1000 μs), higher VC = 53.3 V @ 215 A | Lower surge current handling; suitable for less severe transient environments (e.g., non-load-dump industrial) | Choose when cost optimization is prioritized and full 3000 W capability is not required |
Compared with SMAJ33CA and SMCJ33CA, the SMC3K33CAHM3_A provides triple the peak pulse power of SMAJ33CA and double that of SMCJ33CA within the same SMC footprint-enabling single-device compliance with ISO 16750-2 Pulse b in 12 V automotive systems without derating or parallel devices.
Availability
SMC3K33CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom surge protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMC3K33CAHM3_A 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh automotive environments-including engine control, ADAS, and battery management systems.
FAQ
What is the maximum clamping voltage of the SMC3K33CAHM3_A under a 10/1000 μs surge?
The SMC3K33CAHM3_A clamps to 53.3 V when subjected to its rated peak pulse current of 430 A with a 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number: 98241, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the SMC3K33CAHM3_A suitable for automotive applications?
Yes, the SMC3K33CAHM3_A is AEC-Q101 qualified and explicitly tested for automotive transient standards including ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b). Its 175 °C max junction temperature, MSL Level 1 rating, and halogen-free construction make it appropriate for under-hood and chassis-mounted automotive electronics.
What does the "HM3_A" suffix indicate in SMC3K33CAHM3_A?
The "HM3_A" suffix denotes Vishay's high-reliability, halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. The "HM3" portion also confirms compliance with JESD 201 Class 2 whisker resistance testing-critical for long-life automotive and industrial deployments.
How does the SMC3K33CAHM3_A compare to standard SMAJ or SMCJ series TVS diodes?
The SMC3K33CAHM3_A delivers 3000 W peak pulse power (10/1000 μs), exceeding SMAJ33CA (400 W) and SMCJ33CA (1500 W) by 7.5× and 2× respectively. It shares the SMC (DO-214AB) package with SMCJ33CA but adds AEC-Q101 qualification and tighter clamping performance-making it the only option among the three validated for full ISO 16750-2 Pulse b compliance in 12 V systems.
What is the standoff voltage and breakdown voltage range for the SMC3K33CAHM3_A?
The SMC3K33CAHM3_A has a nominal standoff voltage (VWM) of 33 V and a guaranteed breakdown voltage (VBR) range of 36.7 V to 40.6 V at 1 mA test current. This ensures reliable non-conduction during normal operation while triggering promptly during overvoltage events-verified per Table 1 of the Vishay datasheet (98241).
SMC3K33CAHM3_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):
- 56.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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)
SMC3K33CAHM3_A/I FAQ
1.How can I place an order for SMC3K33CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K33CAHM3_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 SMC3K33CAHM3_A/I reliable?
The price and inventory of SMC3K33CAHM3_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 SMC3K33CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K33CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K33CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K33CAHM3_A/I?
SMC3K33CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K33CAHM3_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 SMC3K33CAHM3_A/I?
For technical support, including SMC3K33CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K33CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K33CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K33CAHM3_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 SMC3K33CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K33CAHM3_A/I?
All SMC3K33CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K33CAHM3_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 SMC3K33CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K33CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K33CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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