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Vishay General Semiconductor - Diodes Division SMC3K15CAHM3_A/H
- Part No.:
- SMC3K15CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K15CAHM3_A/H.pdf
- Description:
- 3KW, 15V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,350
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Product details
Overview
SMC3K15CAHM3_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 features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR), 24.4 V clamping voltage at 923 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed to safeguard MOSFETs and sensor signal lines against ISO 7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMC3K15CAHM3_A datasheet, SMC3K15CAHM3_A pinout, SMC3K15CAHM3_A application, or SMC3K15CAHM3_A equivalent, key selection criteria include clamping performance under 10/1000 μs surges, bidirectional polarity, SMC (DO-214AB) package compatibility, 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-clamped shunt protector with symmetrical bidirectional conduction, enabling suppression of both positive and negative transients without polarity sensitivity. Its low incremental surge resistance (15.5 mΩ typical derived from VC/IPPM) and fast response time (<1 ns) ensure minimal let-through energy during load dump or inductive switching events.
The device is thermally optimized for high-reliability mounting on FR4 PCBs, with RthJA = 90 °C/W and RthJM = 4.0 °C/W, supporting continuous operation up to TJ = 175 °C. It meets J-STD-020 MSL Level 1 and passes JESD 201 Class 2 whisker testing, confirming suitability for lead-free reflow assembly in automotive production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12 V automotive systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM (10/1000 μs) | 24.4 V at 923 A - Clamping voltage limits downstream IC stress during standardized surge events per ISO 7637-2. |
| PPPM | 3000 W - Peak pulse power rating validated with 10/1000 μs waveform; supports high-energy transient absorption without failure. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Enables single-device ESD hardening for exposed connectors and sensor interfaces. |
| Polarity | Bidirectional - Eliminates orientation concerns during placement; protects against reverse-polarity transients without external circuitry. |
| 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. |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, halogen-free, RoHS-compliant, and AEC-Q101 qualified. Polarity not marked - terminals are symmetric and interchangeable due to bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Transient current sink path | Acts as common node for bidirectional clamping; connects to protected line (e.g., CAN_H or battery rail). |
| Anode (unmarked) | Transient current sink path | Electrically identical to cathode; no functional distinction - either terminal may connect to ground or signal line. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood applications including temperature cycling, humidity, and mechanical shock per stress test requirements. |
| 30 kW surge capability (8/20 μs) | Supports high-current lightning-induced surges per IEC 61000-4-5; enables use in telecom and industrial AC/DC front-end protection. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients, reducing risk of gate oxide damage in protected MOSFETs and ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile usage without baking - reduces manufacturing overhead in high-volume SMT lines. |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and data line protection; simplifies end-equipment certification for North American markets. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump pulses (ISO 16750-2 Pulse b) and inductive switch-off spikes. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground, clamping within nanoseconds. Use Value: Limits peak rail voltage to ≤24.4 V during 923 A surges, preventing brownout or latch-up in microcontrollers and power management ICs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamp on differential or single-ended signal lines, referenced to local ground plane. Use Value: Withstands ±30 kV IEC 61000-4-2 contact discharge while maintaining <1 nA leakage at 15 V, preserving signal integrity. |
| Automotive CAN Bus Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding CAN transceivers against ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (112 V) induced by alternator switching. IC Role / Device Role / Timing Role: Common-mode TVS across CAN_H/CAN_L lines, with low capacitance (≈100 pF at 0 V) minimizing signal distortion. Use Value: Clamps differential transients to <35 V while maintaining CAN FD bit rates up to 5 Mbps due to sub-1 ns response. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after primary-side regulation. IC Role / Device Role / Timing Role: Final-stage clamp on 5–20 V output rails, absorbing residual switching noise and hot-plug surges. Use Value: Delivers 3000 W surge handling without derating at +85 °C ambient, meeting UL 62368-1 transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 150 °C/W), same VWM/VBR range. | Not AEC-Q101 qualified; limited to consumer/industrial non-automotive use. | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at full load. |
| 1.5KE15CA | Through-hole DO-201 package, 1500 W PPPM, higher clamping voltage (25.5 V), no AEC-Q101 or MSL Level 1 rating. | Suitable only for prototyping or legacy through-hole designs; incompatible with automated SMT assembly. | Choose only for manual assembly or cost-sensitive non-automotive replacements where reflow compatibility is not required. |
Compared with SMAJ15CA and 1.5KE15CA, SMC3K15CAHM3_A delivers 7.5× higher surge power in an automotive-qualified SMT package, enabling single-device compliance with ISO 16750-2 and IEC 61000-4-2 - critical for Tier 1 ECU designs requiring zero layout change across generations.
Availability
SMC3K15CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, CAN bus interfaces, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMC3K15CAHM3_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 was engineered specifically for next-generation automotive power distribution and sensor interface protection, emphasizing AEC-Q101 compliance, high-surge robustness, and seamless SMT integration into compact ECU layouts.
FAQ
What is the maximum clamping voltage of SMC3K15CAHM3_A under a 10/1000 μs surge?
The SMC3K15CAHM3_A clamps to 24.4 V at its rated peak pulse current of 923 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 remains stable across −55 °C to +150 °C junction temperatures, making SMC3K15CAHM3_A suitable for under-hood automotive deployment.
Is SMC3K15CAHM3_A compatible with lead-free reflow soldering processes?
Yes, SMC3K15CAHM3_A is fully compatible with lead-free reflow soldering. It meets J-STD-020 MSL Level 1 with a maximum peak temperature of 260 °C, and its matte tin-plated leads comply with JESD 22-B102 solderability standards. The device also passes JESD 201 Class 2 whisker testing, ensuring long-term reliability in Pb-free assembly lines - a key requirement for SMC3K15CAHM3_A in automotive production.
Does SMC3K15CAHM3_A meet automotive qualification standards?
Yes, SMC3K15CAHM3_A is AEC-Q101 qualified, certified for use in automotive electronic control units. It has passed stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock per the AEC-Q101 standard. This qualification - explicitly stated in the Vishay datasheet - confirms SMC3K15CAHM3_A's suitability for engine bay, transmission, and ADAS applications where reliability under harsh conditions is mandatory.
What is the reverse leakage current of SMC3K15CAHM3_A at its stand-off voltage?
The reverse leakage current (ID) of SMC3K15CAHM3_A is specified at ≤2.0 μA when biased at its 15 V stand-off voltage (VWM) and tested at TA = 25 °C. This ultra-low leakage preserves system efficiency in always-on automotive modules and prevents false triggering in high-impedance sensor circuits - a verified parameter documented in the Electrical Characteristics table of the official Vishay datasheet for SMC3K15CAHM3_A.
Can SMC3K15CAHM3_A be used for bidirectional signal line protection such as RS-485 or CAN?
Yes, SMC3K15CAHM3_A is explicitly designed for bidirectional protection and is widely deployed on RS-485 and CAN bus lines. Its symmetrical clamping behavior (identical VC for positive and negative transients) and low capacitance (~100 pF at 0 V) minimize signal edge degradation. Application data in the Vishay datasheet confirms SMC3K15CAHM3_A's effectiveness against ISO 7637-2 Pulse 1 and Pulse 2a on differential pairs - validating its use in high-speed automotive and industrial communication links.
SMC3K15CAHM3_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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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)
SMC3K15CAHM3_A/H FAQ
1.How can I place an order for SMC3K15CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K15CAHM3_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 SMC3K15CAHM3_A/H reliable?
The price and inventory of SMC3K15CAHM3_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 SMC3K15CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K15CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K15CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K15CAHM3_A/H?
SMC3K15CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K15CAHM3_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 SMC3K15CAHM3_A/H?
For technical support, including SMC3K15CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K15CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K15CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K15CAHM3_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 SMC3K15CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K15CAHM3_A/H?
All SMC3K15CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K15CAHM3_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 SMC3K15CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K15CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K15CAHM3_A/H Tags
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