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Vishay General Semiconductor - Diodes Division SMC3K90CAHM3_A/H
- Part No.:
- SMC3K90CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K90CAHM3_A/H.pdf
- Description:
- 3KW, 90V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
SMC3K90CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for automotive-grade overvoltage protection. It features 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR), 146 V clamping voltage at 20.5 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed on power rails and signal lines of automotive ECUs and sensor interfaces.
For engineers reviewing the SMC3K90CAHM3_A datasheet, SMC3K90CAHM3_A pinout, SMC3K90CAHM3_A application, or SMC3K90CAHM3_A equivalent, key selection criteria include ISO 7637-2 Pulse 1/2a/3a/3b compliance, 30 kV ESD immunity per IEC 61000-4-2, thermal resistance (RthJA = 90 °C/W), and bidirectional clamping behavior in 12 V battery systems.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding VBR, it avalanches to divert surge current away from downstream ICs or MOSFETs. Its low incremental surge resistance ensures stable clamping under high-current pulses like ISO 16750-2 Pulse b (load dump).
Designed for automotive environments, it supports junction temperatures from –55 °C to +175 °C, meets MSL Level 1 reflow (260 °C peak), and passes JESD 201 Class 2 whisker testing. The halogen-free, RoHS-compliant HM3_A suffix confirms AEC-Q101 qualification and UL 497B safety recognition (E136766).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC operating margin for 12 V automotive systems. |
| VBR (min/max) | 100 V / 111 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM (10/1000 μs) | 146 V at 20.5 A - Clamping voltage under standardized surge; limits downstream voltage stress to ≤146 V during 10/1000 μs transients. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; enables robust protection against inductive switching spikes. |
| ESD Rating | ±30 kV (contact & air) - Human Body Model (HBM) immunity per IEC 61000-4-2; protects against electrostatic discharge during handling and operation. |
| TJ max. | +175 °C - Maximum junction temperature; supports under-hood deployment in engine control modules and body electronics. |
| RthJA | 90 °C/W - Junction-to-ambient thermal resistance on FR4 PCB; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal (non-marked end) | Connected to protected line; forms symmetrical bidirectional clamp with anode terminal - no polarity dependency in layout. |
| Anode (A) | Cathode-side terminal (non-marked end) | Connected to ground or reference rail; completes low-impedance surge path during both positive and negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - eliminates need for dual-diode configurations. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - required for ECU, ADAS, and infotainment modules. |
| 30 kW surge rating (8/20 μs) | Supports high-energy lightning-induced surges per IEC 61000-4-5; clamps at 189 V (8/20 μs) with 159 A peak current. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of protection stage. |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and industrial equipment requiring certified transient suppressors in primary circuits. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against load dump (ISO 16750-2 Pulse b) and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly at power entry point before DC/DC converter input. Use Value: Limits voltage excursion to ≤146 V during 10/1000 μs surges, preventing latch-up or damage to upstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to cable ESD and field wiring transients. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across signal and return paths to clamp ±30 kV HBM events and 1 kV ring wave surges. Use Value: Maintains signal integrity by clamping transients below 189 V (8/20 μs), avoiding saturation or offset errors in precision amplifiers and ADC drivers. |
| Telecom Line Surge Protection | Consumer Device USB/Power Port Protection |
|
Use Scenario: Front-end protection of Ethernet PHY power pins and auxiliary bias rails in PoE-powered network switches compliant with IEC 61000-4-5. IC Role / Device Role / Timing Role: High-power TVS placed between isolated DC-DC output and PHY IC supply, referenced to local ground plane. Use Value: Absorbs up to 3000 W of surge energy while holding clamping voltage below 146 V - preserving PHY IC reliability under repeated lightning surges. |
Use Scenario: Overvoltage suppression on USB-C VBUS and 5 V auxiliary power inputs in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Bidirectional clamp between input rail and chassis ground, sized to handle hot-plug inrush and ESD coupling. Use Value: Provides ±30 kV contact ESD immunity and clamps 100 V transients to 146 V within 1 ns - preventing USB controller reset or port disable events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Same VWM (90 V) and bidirectional configuration, but SMB package (lower PPPM = 600 W, RthJA = 110 °C/W). | Limited to lower-energy transients (e.g., board-level ESD only); unsuitable for ISO 7637-2 Pulse 1 or load dump. | Select SMBJ90CA only when space-constrained layouts prohibit SMC footprint and surge energy remains below 600 W. |
| SMCJ90CA | Identical SMC package and 3000 W rating, but non-AEC-Q101 qualified and no UL 497B recognition. | Acceptable for industrial/commercial use where automotive qualification or safety certification is not mandated. | Choose SMCJ90CA for cost-sensitive non-automotive designs requiring same electrical performance without AEC-Q101 or UL compliance. |
Compared with SMBJ90CA and SMCJ90CA, the SMC3K90CAHM3_A uniquely combines AEC-Q101 qualification, UL 497B safety listing, and 3000 W surge capability in the SMC footprint - making it the sole option for production automotive power rail protection requiring full ISO 7637-2 and IEC 61000-4-2 compliance.
Availability
SMC3K90CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and telecom power rail protection 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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for AEC-Q101-compliant automotive transient suppression with emphasis on ISO 7637-2 and ISO 16750-2 compliance.
FAQ
What is the clamping voltage of SMC3K90CAHM3_A under a 10/1000 μs surge?
The SMC3K90CAHM3_A clamps at 146 V when subjected to its rated peak pulse current of 20.5 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet (Document Number: 98241, Rev. 09-Jan-2024). The clamping voltage defines the maximum voltage seen by downstream circuitry during such transients, ensuring compatibility with 12 V system components rated for ≤150 V absolute maximum.
Is SMC3K90CAHM3_A qualified for automotive applications?
Yes, the SMC3K90CAHM3_A is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet and verified via the HM3_A suffix designation. It meets automotive environmental stress requirements including temperature cycling, humidity bias, and mechanical shock testing. This qualification makes SMC3K90CAHM3_A suitable for use in engine control units, body control modules, and ADAS sensors where reliability under harsh conditions is mandatory.
Does SMC3K90CAHM3_A have polarity markings on the package?
No, the SMC3K90CAHM3_A is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) package. Its symmetrical construction allows installation in either orientation across protected lines and ground - simplifying PCB layout and eliminating risk of reverse placement. Polarity identification is unnecessary because both terminals behave identically under positive and negative transients.
What standards does SMC3K90CAHM3_A meet for ESD and surge immunity?
The SMC3K90CAHM3_A meets IEC 61000-4-2 for ESD immunity (±30 kV contact and air discharge) and complies with ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) for automotive transient immunity. These certifications are documented in the Vishay datasheet and supported by test data showing clamping voltages under each pulse profile - confirming suitability for front-end protection in automotive and industrial environments.
What is the thermal resistance of SMC3K90CAHM3_A, and how does it affect layout?
The SMC3K90CAHM3_A has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. This value guides copper pour sizing and thermal relief design: for repeated surge events, designers should allocate ≥200 mm² of 2 oz. copper connected to both terminals to maintain junction temperature below 175 °C. The low RthJM (4.0 °C/W) also supports effective heat transfer to internal ground planes in multilayer boards.
SMC3K90CAHM3_A/H 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:
- -
- 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/H FAQ
1.How can I place an order for SMC3K90CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K90CAHM3_A/H 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/H reliable?
The price and inventory of SMC3K90CAHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMC3K90CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K90CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K90CAHM3_A/H?
SMC3K90CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K90CAHM3_A/H 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/H?
For technical support, including SMC3K90CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K90CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K90CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K90CAHM3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of SMC3K90CAHM3_A/H?
All SMC3K90CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K90CAHM3_A/H, 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/H part is unused and in its original packaging.
Return procedure for SMC3K90CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K90CAHM3_A/H Tags
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