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Vishay General Semiconductor - Diodes Division SMC3K17CAHM3_A/H
- Part No.:
- SMC3K17CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K17CAHM3_A/H.pdf
- Description:
- 3KW, 17V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:1,655
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Product details
Overview
SMC3K17CAHM3_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), 18.9–20.9 V breakdown voltage, and 27.6 V clamping voltage at 811 A peak pulse current. It protects sensitive ICs and MOSFETs in automotive power systems against ISO 7637-2 and ISO 16750-2 transients.
For engineers reviewing the SMC3K17CAHM3_A datasheet, SMC3K17CAHM3_A pinout, SMC3K17CAHM3_A application, or SMC3K17CAHM3_A equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional clamping behavior, 175 °C junction temperature rating, UL 497B recognition, and compliance with IEC 61000-4-2 ESD (30 kV contact/air).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages by entering avalanche conduction. Its bidirectional architecture enables symmetrical clamping across both polarities without polarity marking, supporting robust protection of differential or AC-coupled signal paths.
It delivers 3000 W peak pulse power under 10/1000 μs waveform and sustains 30 kW under 8/20 μs surge conditions, with low incremental surge resistance ensuring minimal voltage overshoot during fast-rising transients. Thermal design is supported by RthJM = 4.0 °C/W and RthJA = 90 °C/W on standard FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 18.9–20.9 V at 1.0 mA test current - defines minimum voltage at which avalanche conduction begins, ensuring reliable triggering before downstream device damage. |
| Stand-off Voltage VWM | 17 V - maximum continuous reverse operating voltage; system must operate below this to avoid leakage-induced power loss or false triggering. |
| Clamping Voltage VC | 27.6 V at 811 A (10/1000 μs) - actual voltage seen by protected circuit during worst-case surge; critical for ensuring downstream ICs remain within absolute maximum ratings. |
| Peak Pulse Power PPPM | 3000 W (10/1000 μs) - energy-handling capacity defining survivability against common automotive load dump and switching surges. |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in under-hood automotive environments and industrial power supplies with wide thermal excursions. |
| ESD Withstand | 30 kV per IEC 61000-4-2 (contact & air) - provides immunity to human-body-model electrostatic discharge events without degradation. |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0. Bidirectional construction means no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Transient current sink node | Connected to protected line; conducts surge current to ground during overvoltage event - terminal identity defined by internal die symmetry, not external marking. |
| Anode (A) | Transient current source node | Connected to reference (typically ground); completes low-impedance path during bidirectional clamping - functionally identical to cathode under reverse polarity surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or unmarked DC lines without polarity concerns - eliminates need for dual-diode configurations or orientation checks during assembly. |
| 30 kW surge capability (8/20 μs) | Supports compliance with ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge immunity testing - essential for 12 V automotive battery rail protection. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on protected devices - e.g., 27.6 V clamp ensures 3.3 V or 5 V logic interfaces remain safely within safe operating area during transients. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns - reduces manufacturing risk and eliminates bake requirements. |
| UL 497B recognition (E136766) | Validates safety compliance for telecom and industrial interface protection - satisfies regulatory requirements for field-installable equipment and data line surge protectors. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2 Pulse b) and inductive switching spikes (ISO 7637-2 Pulse 1/2a/3a/3b). IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground, clamping surges within nanoseconds. Use Value: Prevents latch-up or gate oxide rupture in MCU power inputs and CAN transceivers by limiting rail voltage to ≤27.6 V during 811 A transients. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to microcontrollers in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential or single-ended signal lines exposed to ESD and cable discharge events. Use Value: Maintains signal integrity by suppressing ±30 kV ESD strikes without forward conduction into low-voltage analog front-ends (<5 V supply rails). |
| Telecom Data Line Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Front-end protection of Ethernet PHYs, RS-485 transceivers, or PoE injectors subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary surge suppression element placed before isolation transformers or common-mode chokes on data lines. Use Value: Absorbs up to 30 kW (8/20 μs) without failure, enabling compliance with Telcordia GR-1089-CORE and ITU-T K.21. |
Use Scenario: Input-stage transient suppression in AC/DC adapters for smart home devices, preventing surge propagation from mains input to secondary-side controllers. IC Role / Device Role / Timing Role: Secondary-side TVS across DC bus after rectification, protecting switching FETs and feedback optocouplers from reflected transients. Use Value: Clamps 17 V nominal DC bus to 27.6 V during 10/1000 μs surges, avoiding overvoltage shutdown or capacitor over-stress in compact 5 W–30 W adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Lower peak pulse power (400 W), SMA package (smaller footprint, higher thermal resistance), same VBR range (18.9–20.9 V). | Not suitable for automotive load dump or high-current industrial surges; limited to low-energy ESD and signal-line protection. | Select SMC3K17CAHM3_A when >1 kW surge handling or AEC-Q101 qualification is required; SMAJ17CA fits space-constrained consumer PCBs. |
| 1.5KE18CA | Through-hole DO-201 package, 1500 W rating (10/1000 μs), higher VC (30.0 V at 500 A), no AEC-Q101 or MSL-1 rating. | Lacks automotive qualification and surface-mount compatibility; suited for legacy industrial power supplies with manual assembly. | Choose SMC3K17CAHM3_A for automated SMT production, high-reliability automotive use, or where 3000 W headroom is needed; 1.5KE18CA remains viable for cost-sensitive through-hole designs. |
Compared with SMAJ17CA and 1.5KE18CA, SMC3K17CAHM3_A uniquely combines 3000 W surge capability, AEC-Q101 qualification, MSL Level 1 reflow compatibility, and bidirectional SMC packaging - making it the only option meeting full ISO 16750-2 Pulse b and IEC 61000-4-2 requirements in a production-ready SMT form factor.
Availability
SMC3K17CAHM3_A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, telecom infrastructure interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K17CAHM3_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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 175 °C operation are mandatory.
FAQ
What is the maximum clamping voltage of SMC3K17CAHM3_A under a 10/1000 μs surge?
The maximum clamping voltage of SMC3K17CAHM3_A is 27.6 V when subjected to an 811 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and represents the highest voltage the device allows across its terminals during that specific surge condition - critical for verifying compatibility with downstream IC voltage tolerances. SMC3K17CAHM3_A maintains this performance across its full operating temperature range.
Is SMC3K17CAHM3_A qualified for automotive applications?
Yes, SMC3K17CAHM3_A is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature operating life, and mechanical shock - all required for automotive under-hood and cabin electronics. Its −55 °C to +175 °C junction temperature range and compliance with ISO 7637-2 and ISO 16750-2 further validate its suitability for engine control modules, body controllers, and ADAS sensors. SMC3K17CAHM3_A carries the HM3 suffix confirming halogen-free, RoHS-compliant, and whisker-resistant construction.
What does the "CA" in SMC3K17CAHM3_A signify?
The "CA" in SMC3K17CAHM3_A denotes bidirectional configuration - indicating the device provides symmetrical transient suppression for both positive and negative voltage excursions. This contrasts with "A"-suffixed variants (e.g., SMC3K17AHM3_A), which are unidirectional and require correct polarity placement. The bidirectional nature of SMC3K17CAHM3_A eliminates orientation dependency during PCB assembly and simplifies protection of AC-coupled or differential signal paths.
Can SMC3K17CAHM3_A be used in place of SMC3K15CAHM3_A or SMC3K18CAHM3_A?
SMC3K17CAHM3_A is not a direct replacement for SMC3K15CAHM3_A or SMC3K18CAHM3_A due to differences in breakdown voltage (18.9–20.9 V vs. 16.7–18.5 V and 20.0–22.1 V respectively) and corresponding clamping voltages (27.6 V vs. 24.4 V and 29.2 V). Substituting requires verification that the protected circuit's voltage margins accommodate the new VBR and VC values. SMC3K17CAHM3_A should only replace other variants when its specific 17 V stand-off and 27.6 V clamping characteristics match the system's transient design targets.
What is the thermal resistance from junction to mount (RthJM) for SMC3K17CAHM3_A?
The thermal resistance from junction to mount (RthJM) for SMC3K17CAHM3_A is 4.0 °C/W, measured using JEDEC® 51-14 Transient Dual Interface Method (TDIM) on a standard copper pad. This low value enables efficient heat transfer to the PCB copper pour or heatsink, supporting sustained surge duty cycles and high ambient temperature operation. When designing thermal layout for SMC3K17CAHM3_A, ensure adequate copper area beneath the SMC footprint to realize this RthJM performance in practice.
SMC3K17CAHM3_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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 109A
- 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)
SMC3K17CAHM3_A/H FAQ
1.How can I place an order for SMC3K17CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K17CAHM3_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 SMC3K17CAHM3_A/H reliable?
The price and inventory of SMC3K17CAHM3_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 SMC3K17CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K17CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K17CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K17CAHM3_A/H?
SMC3K17CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K17CAHM3_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 SMC3K17CAHM3_A/H?
For technical support, including SMC3K17CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K17CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K17CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K17CAHM3_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 SMC3K17CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K17CAHM3_A/H?
All SMC3K17CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K17CAHM3_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 SMC3K17CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K17CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K17CAHM3_A/H Tags
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