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Vishay General Semiconductor - Diodes Division SMC3K120CAHM3_A/I
- Part No.:
- SMC3K120CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K120CAHM3_A/I.pdf
- Description:
- 3KW, 120V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,174
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Product details
Overview
SMC3K120CAHM3_A 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 3000 W peak pulse power (10/1000 μs), 193 V clamping voltage at 15.5 A, and 120 V stand-off voltage. It protects automotive power electronics, sensor signal lines, and MOSFET gate drivers against ISO 7637-2 and ISO 16750-2 transients.
For engineers reviewing the SMC3K120CAHM3_A datasheet, SMC3K120CAHM3_A pinout, SMC3K120CAHM3_A application, or SMC3K120CAHM3_A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 30 kV ESD immunity per IEC 61000-4-2, and compatibility with 12 V battery system load-dump and pulse-b transient waveforms.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ns to overvoltage events and maintaining low incremental surge resistance to limit energy dissipation in downstream circuitry. Its bidirectional architecture enables symmetric clamping across both polarities without polarity marking.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and UL 497B safety recognition (E136766), with thermal resistance RthJM = 4.0 °C/W enabling robust mounting on PCB copper planes. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD 201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 120 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 133–147 V at 1 mA - Confirmed voltage range where device enters avalanche conduction; ensures reliable turn-on during transients. |
| Clamping Voltage (VC) | 193 V at 15.5 A (10/1000 μs) - Peak voltage seen by protected circuit under rated surge; determines maximum stress on downstream components. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Energy-handling capacity for standard automotive surge waveform; supports repeated ISO 7637-2 Pulse 1/2a/3a/3b compliance. |
| ESD Immunity | 30 kV per IEC 61000-4-2 (contact & air) - Withstands human-body-model electrostatic discharge without degradation; eliminates need for external ESD staging. |
| Operating Temperature | −55 °C to +175 °C - Junction temperature range validated for under-hood automotive environments and industrial motor control enclosures. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SMC (DO-214AB) package with two terminals: cathode and anode. Bidirectional construction means no polarity marking; either terminal may serve as input or return path depending on transient polarity. Matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Accepts negative-going surges; conducts to cathode when voltage exceeds −VBR, limiting reverse-side overvoltage. |
| Cathode | Transient current entry point (positive polarity) | Accepts positive-going surges; conducts to anode when voltage exceeds +VBR, limiting forward-side overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns or external diode pairing. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field performance over 15+ year lifetimes. |
| 30 kV HBM ESD rating | Eliminates need for secondary ESD suppression on CAN, LIN, or sensor interfaces exposed to assembly handling or end-user contact. |
| Low Rsurge (incremental) | Minimizes VC rise under high-current pulses-critical for protecting low-voltage logic ICs and gate drivers from overshoot-induced latch-up. |
| Halogen-free & RoHS | Meets global environmental compliance mandates (EU RoHS, China RoHS, JEITA) without compromising surge robustness or thermal performance. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump (ISO 16750-2 Pulse b) and inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Shunt TVS placed across power input pins to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits peak voltage to ≤193 V during 100 ms, 101 V load dump events-preventing damage to 36 V-rated input stages and ensuring uninterrupted operation. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal traces to suppress EFT bursts and lightning-induced surges. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 3b (150 ns, 150 V) by clamping to ±193 V while adding only 15 pF junction capacitance at 0 V bias. |
| Automotive CAN/LIN Bus Protection | MOSFET Gate Driver Protection |
Use Scenario: Transient suppression on CAN_H/CAN_L lines in vehicle infotainment and gateway modules subjected to ESD and conducted noise. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between bus lines and ground to absorb common-mode surges without distorting data timing. Use Value: Provides 30 kV contact-mode ESD immunity while adding <20 pF capacitance-preserving CAN FD bit rates up to 5 Mbps without signal edge degradation. |
Use Scenario: Safeguarding high-side/low-side N-channel MOSFET gates in BLDC motor controllers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Clamping diode connected between gate and source to prevent VGS overstress beyond ±20 V absolute maximum ratings. Use Value: Responds in <1 ns to gate ringing events, clamping VGS to ≤±193 V and preventing dielectric breakdown of thin gate oxides in 40 V–100 V MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), unidirectional only, no AEC-Q101 qualification. | Limited to non-automotive, low-energy consumer electronics; unsuitable for ISO 16750-2 load dump or automotive ECU use. | Select only for space-constrained, cost-sensitive designs where 3000 W surge capacity and automotive qualification are not required. |
| 1.5KE120CA (ON Semiconductor) | Through-hole DO-201 package, same 120 V VWM, but lower PPPM (1500 W), no AEC-Q101, higher VC (196 V at 7.7 A). | Requires manual assembly; lacks automotive qualification and 30 kV ESD rating-unsuitable for production automotive or high-reliability industrial use. | Consider only for prototyping or legacy through-hole designs where SMC surface-mount integration is not feasible. |
Compared with SMAJ120A-E3/5A and 1.5KE120CA, the SMC3K120CAHM3_A delivers triple the surge power rating, AEC-Q101 validation for automotive deployment, and superior ESD immunity-making it the sole option qualified for under-hood ECU protection and high-volume automotive production.
Availability
SMC3K120CAHM3_A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and MOSFET gate driver circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMC3K120CAHM3_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, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for automotive-grade transient suppression-delivering high-power clamping, AEC-Q101 validation, and robust thermal performance in compact SMC packages.
FAQ
What is the maximum clamping voltage of the SMC3K120CAHM3_A under a 10/1000 μs surge?
The SMC3K120CAHM3_A clamps to a maximum of 193 V when subjected to its rated peak pulse current of 15.5 A using the 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized automotive surge events such as ISO 7637-2 Pulse 1 and Pulse 2a.
Is the SMC3K120CAHM3_A qualified for automotive applications?
Yes, the SMC3K120CAHM3_A is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) transient immunity standards, carries UL 497B safety recognition (file E136766), and is rated for operation from −55 °C to +175 °C-fully supporting under-hood and powertrain module requirements.
Does the SMC3K120CAHM3_A have polarity markings on the package?
No, the SMC3K120CAHM3_A is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package. Its symmetrical breakdown characteristics allow either terminal to serve as anode or cathode depending on transient polarity-simplifying layout and eliminating orientation errors during automated assembly.
What is the junction-to-mount thermal resistance (RthJM) of the SMC3K120CAHM3_A?
The SMC3K120CAHM3_A has a typical junction-to-mount thermal resistance (RthJM) of 4.0 °C/W, measured per JEDEC® 51-14 using the Transient Dual Interface Method. This low value enables efficient heat transfer to PCB copper pads or metal-core substrates-critical for sustaining repeated surge events in thermally constrained automotive modules.
Can the SMC3K120CAHM3_A be used for ESD protection on communication lines like CAN or LIN?
Yes, the SMC3K120CAHM3_A provides 30 kV ESD immunity per IEC 61000-4-2 (contact and air discharge), making it suitable for CAN and LIN bus line protection. Its bidirectional behavior and low 15 pF junction capacitance at 0 V bias preserve signal integrity at high data rates-validated for CAN FD up to 5 Mbps without edge distortion or timing skew.
SMC3K120CAHM3_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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K120CAHM3_A/I FAQ
1.How can I place an order for SMC3K120CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K120CAHM3_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 SMC3K120CAHM3_A/I reliable?
The price and inventory of SMC3K120CAHM3_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 SMC3K120CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K120CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K120CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K120CAHM3_A/I?
SMC3K120CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K120CAHM3_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 SMC3K120CAHM3_A/I?
For technical support, including SMC3K120CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K120CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K120CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K120CAHM3_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 SMC3K120CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K120CAHM3_A/I?
All SMC3K120CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K120CAHM3_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 SMC3K120CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K120CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K120CAHM3_A/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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