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Vishay General Semiconductor - Diodes Division SMC3K90CAHM3_A/I
- Part No.:
- SMC3K90CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K90CAHM3_A/I.pdf
- Description:
- 3KW, 90V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,926
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Product details
Overview
SMC3K90CAHM3_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), 100–111 V breakdown voltage, and 146 V clamping voltage at 20.5 A. It protects automotive sensor signal lines, MOSFET gates, and IC power rails against ISO 7637-2 Pulse 1/2a/3a/3b and ISO 16750-2 Pulse b transients.
For engineers reviewing the SMC3K90CAHM3_A datasheet, SMC3K90CAHM3_A pinout, SMC3K90CAHM3_A application, or SMC3K90CAHM3_A equivalent, this device is selected for AEC-Q101-qualified 12 V automotive systems requiring robust ESD immunity (30 kV HBM), low clamping ratio (1.46×VWM), and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS operates as a voltage-clamped shunt protector triggered by reverse-biased avalanche breakdown. Its bidirectional structure enables symmetrical clamping of both positive and negative transients without polarity marking, supporting unidirectional or differential signal line protection in automotive ECUs and ADAS sensor interfaces.
It delivers 30 kW peak pulse handling under 8/20 μs waveform (159 A), with thermal resistance RthJM = 4.0 °C/W enabling sustained operation at TJ up to +175 °C. The halogen-free, RoHS-compliant HM3_A suffix confirms JESD 201 Class 2 whisker resistance and UL 497B safety recognition (E136766).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 100–111 V at 1 mA - defines precise avalanche initiation threshold for reliable turn-on before downstream component damage |
| Stand-off Voltage (VWM) | 90 V - maximum continuous reverse operating voltage; ensures no leakage conduction during normal 12 V system operation |
| Clamping Voltage (VC) | 146 V at 20.5 A (10/1000 μs) - limits transient voltage seen by protected IC to safe margin below absolute max ratings |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - sustains high-energy load dump and inductive switching surges without failure |
| ESD Rating | 30 kV per IEC 61000-4-2 (contact & air) - eliminates need for additional ESD diodes on exposed connectors or buttons |
| Operating Temperature | −55 °C to +175 °C - supports under-hood placement in engine control modules and battery management systems |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 solderability and JESD 22-B102 thermal shock testing; bidirectional polarity - no cathode marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal during negative transient | Connects to line being protected; forms low-impedance path to ground when reverse voltage exceeds VBR |
| Cathode (K) | Current entry terminal during positive transient | Connects to line being protected; identical physical terminal to Anode in bidirectional configuration - no polarity distinction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis applications including engine control units and brake ECUs |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 3b, 150 ns rise time) |
| MSL Level 1 rating | Supports lead-free reflow assembly at peak 260 °C without popcorn cracking or delamination |
| UL 497B recognition (E136766) | Confirms compliance with safety standards for telecom and industrial interface protection circuits |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) in vehicle body control modules subject to ISO 7637-2 Pulse 1 (−150 V) and Pulse 3b (150 V). IC Role / Device Role / Timing Role: Shunt clamping device placed between signal line and ground, activated within <1 ns to limit transient voltage to ≤146 V. Use Value: Prevents latch-up or gate oxide rupture in 3.3 V/5 V microcontrollers and analog front-ends during load dump events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across input terminals, clamping spikes up to 3000 W without degradation over 10⁵ cycles. Use Value: Eliminates false triggering and extends mean time between failures (MTBF) in factory automation environments. |
| Telecom Interface Protection | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers in base station equipment against lightning-induced surges per IEC 61000-4-5 (8/20 μs, 159 A). IC Role / Device Role / Timing Role: Primary-level surge arrestor mounted at board edge, limiting common-mode transients before they reach isolation barriers. Use Value: Maintains signal integrity while meeting EN 61000-4-5 Level 4 immunity requirements without adding bulk capacitance. |
Use Scenario: Front-end protection for AC-DC adapters in smart home hubs, absorbing line-to-ground surges from mains switching transients. IC Role / Device Role / Timing Role: Bidirectional clamp across primary-side rectifier output, suppressing ringing and overvoltage during MOSFET turn-off. Use Value: Reduces need for oversized input capacitors and improves efficiency by minimizing voltage stress on primary-side FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA | Same VWM (90 V) and VBR (100–111 V), but lower PPPM (400 W) and smaller SMA package (DO-214AC) | Limited to low-energy consumer electronics; insufficient for ISO 7637-2 Pulse 1 or automotive load dump | Select only for space-constrained non-automotive designs where peak surge energy remains below 400 W |
| SMCJ90CA | Identical SMC package and 3000 W rating, but standard HM3 (not HM3_A) suffix - lacks AEC-Q101 qualification and JESD 201 Class 2 whisker test | Acceptable for industrial use but not certified for automotive production; may require additional qualification testing | Choose SMC3K90CAHM3_A when AEC-Q101 compliance and automotive traceability are mandatory |
Compared with SMAJ90CA and SMCJ90CA, the SMC3K90CAHM3_A uniquely combines AEC-Q101 qualification, 30 kV ESD immunity, and full ISO 7637-2 compliance in a single qualified part - eliminating dual-part validation and ensuring supply chain continuity for Tier 1 automotive programs.
Availability
SMC3K90CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom interface hardening requiring stable component supply across multi-year production cycles.
Supply support for SMC3K90CAHM3_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, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant automotive transient suppression with enhanced surge robustness and process-controlled clamping consistency.
FAQ
What is the clamping voltage of SMC3K90CAHM3_A at its rated peak pulse current?
The SMC3K90CAHM3_A has a maximum clamping voltage (VC) of 146 V at 20.5 A under the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 146 V during standardized surge events - critical for safeguarding 100 V-rated components in 12 V automotive systems. The SMC3K90CAHM3_A maintains this performance across its full operating temperature range.
Is SMC3K90CAHM3_A suitable for ISO 16750-2 Pulse b load dump protection?
Yes, the SMC3K90CAHM3_A is explicitly validated for ISO 16750-2 Pulse b (load dump) in 12 V battery systems, with typical clamping performance shown in Figure 7 of the datasheet. Its 3000 W peak pulse power rating and low thermal resistance (RthJM = 4.0 °C/W) enable it to absorb the full energy of the 101 V, 400 ms pulse without degradation. The SMC3K90CAHM3_A meets this requirement without derating at ambient temperatures up to +125 °C.
Does SMC3K90CAHM3_A have a marked polarity on the package?
No, the SMC3K90CAHM3_A is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Both terminals are functionally identical - either can be connected to the line being protected and the other to ground. This simplifies PCB layout and eliminates orientation errors during automated assembly. The SMC3K90CAHM3_A achieves symmetrical clamping behavior due to its internal back-to-back Zener structure.
What is the maximum junction temperature rating for SMC3K90CAHM3_A?
The SMC3K90CAHM3_A has a maximum junction temperature (TJ max.) of +175 °C, verified per AEC-Q101 stress testing. This allows direct mounting near heat-generating components such as power MOSFETs or DC-DC converters in engine control units. Derating curves in Figure 2 confirm usable power dissipation down to 50% of rated PPPM at TJ = 150 °C - a key advantage of the SMC3K90CAHM3_A over lower-TJ alternatives.
How does the HM3_A suffix differentiate SMC3K90CAHM3_A from standard SMCJ variants?
The HM3_A suffix on SMC3K90CAHM3_A denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - features absent in standard SMCJ90CA parts. Unlike generic SMCJ devices, the SMC3K90CAHM3_A carries UL 497B safety recognition (E136766) and is manufactured under automotive-grade process controls. These distinctions make the SMC3K90CAHM3_A the only choice for production automotive applications requiring full compliance documentation and long-term supply assurance.
SMC3K90CAHM3_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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- 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)
SMC3K90CAHM3_A/I FAQ
1.How can I place an order for SMC3K90CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K90CAHM3_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 SMC3K90CAHM3_A/I reliable?
The price and inventory of SMC3K90CAHM3_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 SMC3K90CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K90CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K90CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K90CAHM3_A/I?
SMC3K90CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K90CAHM3_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 SMC3K90CAHM3_A/I?
For technical support, including SMC3K90CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K90CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K90CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K90CAHM3_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 SMC3K90CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K90CAHM3_A/I?
All SMC3K90CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K90CAHM3_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 SMC3K90CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K90CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K90CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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