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Vishay General Semiconductor - Diodes Division SMC3K54CAHM3_A/I
- Part No.:
- SMC3K54CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K54CAHM3_A/I.pdf
- Description:
- 3KW, 54V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,390
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Product details
Overview
SMC3K54CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for automotive and industrial overvoltage protection. It features 54 V standoff voltage (VWM), 60–66.3 V breakdown voltage (VBR), 87.1 V clamping voltage at 34.4 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed across power supply rails and sensor interfaces in 12 V battery systems.
For engineers reviewing the SMC3K54CAHM3_A datasheet, SMC3K54CAHM3_A pinout, SMC3K54CAHM3_A application, or SMC3K54CAHM3_A equivalent, key selection criteria include ISO 7637-2 Pulse 1/2a/3a/3b and ISO 16750-2 Pulse b compliance, 30 kV ESD immunity (IEC 61000-4-2), bidirectional clamping capability, thermal resistance of 90 °C/W (RthJA), and halogen-free, RoHS-compliant construction with MSL Level 1 rating.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive load switching or load dump events. Its bidirectional architecture enables symmetric clamping above and below ground, supporting both positive and negative surge suppression without polarity sensitivity.
It delivers 3000 W peak pulse power under 10/1000 μs waveform and sustains 265 A peak pulse current (8/20 μs), with low incremental surge resistance ensuring minimal voltage overshoot during high-current surges. Junction temperature range spans –55 °C to +175 °C, validated per AEC-Q101 for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V nominal systems or 12 V/24 V rail protection with headroom. |
| VBR (min/max) | 60.0 V / 66.3 V - breakdown threshold range at 1 mA test current; ensures reliable turn-on before system-level damage occurs. |
| VC @ IPPM (10/1000 μs) | 87.1 V at 34.4 A - clamping voltage under standard surge waveform; determines maximum stress imposed on downstream ICs like MCUs or CAN transceivers. |
| PPPM | 3000 W - peak pulse power handling capacity; supports robust protection against ISO 16750-2 Pulse b (load dump) and ISO 7637-2 transients. |
| TJ max. | +175 °C - maximum junction temperature; enables placement near heat sources (e.g., power converters) in engine control units and ADAS modules. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact/air) - protects signal lines from human-body-model electrostatic discharge 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 assembly and reflow profiles up to 260 °C. |
Pinout & Package
SMC3K54CAHM3_A uses the SMC (DO-214AB) package - a molded, halogen-free, RoHS-compliant case with matte tin-plated leads. Polarity is unmarked due to bidirectional functionality; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Surge current return path | Acts as common terminal for bidirectional clamping; connects to protected line (e.g., CAN_H or LIN bus) and ground reference via PCB trace. |
| Anode (unmarked) | Surge current return path | Functionally identical to cathode in bidirectional operation; no polarity marking required - simplifies layout and eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, LIN, RS-485) without polarity constraints or external diodes. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for powertrain and chassis ECUs. |
| 30 kV ESD immunity | Eliminates need for additional ESD protection on exposed connectors or buttons in infotainment and body control modules. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow soldering at 260 °C peak without baking - reduces manufacturing complexity and cost. |
| UL 497B recognition (E136766) | Confirms safety compliance for use in telecom and industrial equipment requiring certified transient protection components. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails in engine control units against load dump pulses per ISO 16750-2 Pulse b. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VCC and GND, clamping voltage spikes within 1 ns to prevent MCU brownout or latch-up. Use Value: Withstands 265 A peak current (8/20 μs) and maintains clamping below 113 V - preserving 5 V LDO input integrity and avoiding system reset. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on sensor output line, absorbing inductive kickback from nearby solenoids or relays. Use Value: 87.1 V clamping at 34.4 A (10/1000 μs) limits transient energy delivered to ADC front-end, preventing saturation or damage to precision op-amps. |
| Automotive CAN Bus Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding high-speed CAN FD transceivers (e.g., TJA1057) from ESD and ISO 7637-2 Pulse 1/2a transients in vehicle networking gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed across CAN_H/CAN_L differential pair, referenced to chassis ground. Use Value: 30 kV HBM ESD rating and sub-1 ns response time prevent bit errors or transceiver latch-up during hot-plug or static discharge events. |
Use Scenario: Protecting Ethernet PHY or PoE interface circuits in outdoor telecom cabinets from lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level surge suppressor on DC bias lines or data pairs, coordinated with secondary GDT or MOV stages. Use Value: 3000 W peak power rating and 113 V clamping (8/20 μs) limit let-through energy to <10 J - enabling robust cascade protection design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/5A | Unidirectional; lower PPPM (400 W); SMA package (smaller footprint, higher RthJA = 150 °C/W). | Limited to DC-biased lines only; unsuitable for AC or differential signals without added components. | Select when space-constrained and polarity is fixed; avoid for CAN/LIN or bidirectional sensor outputs. |
| 1.5KE54CA | Through-hole DO-201 package; same VWM/VBR/VC specs; higher RthJA (70 °C/W) but lower cost. | Not AEC-Q101 qualified; lacks MSL Level 1 and UL 497B certification. | Prefer for non-automotive industrial controls where reflow compatibility and automotive qualification are not required. |
Compared with SMC3K54CAHM3_A, SMAJ54A-E3/5A offers smaller size but sacrifices bidirectionality and surge capacity, while 1.5KE54CA provides equivalent electrical specs in through-hole form but omits automotive and safety certifications critical for OEM deployment.
Availability
SMC3K54CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom line surge mitigation requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMC3K54CAHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMC3KxxCAHM3_A series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and ISO standard conformance are mandatory.
FAQ
What is the clamping voltage of SMC3K54CAHM3_A under a 10/1000 μs surge?
The SMC3K54CAHM3_A clamps to 87.1 V at 34.4 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the maximum voltage seen by downstream circuitry during that transient event. The clamping performance is guaranteed across the full operating temperature range and forms the basis for system-level overvoltage margin calculations in designs using SMC3K54CAHM3_A.
Is SMC3K54CAHM3_A suitable for automotive applications?
Yes, SMC3K54CAHM3_A is AEC-Q101 qualified and explicitly tested to ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) standards. Its –55 °C to +175 °C operating range, MSL Level 1 rating, and UL 497B recognition make it appropriate for engine control units, body electronics, and ADAS modules. All qualification data for SMC3K54CAHM3_A is documented in Vishay's official specification document 98241.
What does the "HM3_A" suffix indicate in SMC3K54CAHM3_A?
The "HM3_A" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability requirements. The "HM3" portion also confirms compliance with JESD 201 Class 2 whisker resistance testing. This suffix identifies the environmental and process qualifications of SMC3K54CAHM3_A - distinct from non-HM3 variants that may lack automotive or green manufacturing compliance.
How does SMC3K54CAHM3_A compare to unidirectional TVS diodes like SMAJ54A?
SMC3K54CAHM3_A is bidirectional and rated for 3000 W peak pulse power, whereas SMAJ54A is unidirectional with only 400 W rating. The bidirectional nature of SMC3K54CAHM3_A allows direct placement across differential lines (e.g., CAN_H/CAN_L) without polarity concerns, while SMAJ54A requires careful orientation and cannot protect AC-coupled signals. Both share 54 V VWM, but SMC3K54CAHM3_A's superior surge handling and automotive qualification make it the preferred choice for demanding applications.
What is the thermal resistance of SMC3K54CAHM3_A, and why does it matter?
SMC3K54CAHM3_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 parameter determines how much the junction temperature rises above ambient under sustained power dissipation - critical for reliability during repetitive surge events or elevated ambient conditions. For example, at 1 W average dissipation, junction temperature increases by 90 °C; proper PCB copper area and thermal vias help maintain SMC3K54CAHM3_A within its 175 °C TJ max limit.
SMC3K54CAHM3_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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 34.4A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K54CAHM3_A/I FAQ
1.How can I place an order for SMC3K54CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K54CAHM3_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 SMC3K54CAHM3_A/I reliable?
The price and inventory of SMC3K54CAHM3_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 SMC3K54CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K54CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K54CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K54CAHM3_A/I?
SMC3K54CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K54CAHM3_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 SMC3K54CAHM3_A/I?
For technical support, including SMC3K54CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K54CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K54CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K54CAHM3_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 SMC3K54CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K54CAHM3_A/I?
All SMC3K54CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K54CAHM3_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 SMC3K54CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K54CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K54CAHM3_A/I Tags
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