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Vishay General Semiconductor - Diodes Division SMC3K30CAHM3_A/H
- Part No.:
- SMC3K30CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K30CAHM3_A/H.pdf
- Description:
- 3KW, 30V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:144
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Product details
Overview
SMC3K30CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 48.4 V under 62.0 A surge current, and features a 33.3–36.8 V breakdown voltage range with ≤1.0 μA leakage at 30 V stand-off. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines against ISO 7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMC3K30CAHM3_A datasheet, SMC3K30CAHM3_A pinout, SMC3K30CAHM3_A application, or SMC3K30CAHM3_A equivalent, key selection criteria include its 30 V stand-off voltage, bidirectional clamping behavior, SMC (DO-214AB) package compatibility, and compliance with ISO 16750-2 Pulse b load dump requirements in 12 V battery systems.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages and diverting surge current away from sensitive downstream circuitry. Its low incremental surge resistance (≈0.78 Ω, derived from ΔV/ΔI = (48.4 V − 30 V)/62.0 A) ensures minimal voltage overshoot during high-current events like inductive switching or ESD.
The device is optimized for automotive-grade reliability: it meets AEC-Q101 stress testing, achieves MSL Level 1 moisture sensitivity, withstands 30 kV HBM ESD per IEC 61000-4-2, and maintains stable clamping performance across −55 °C to +175 °C junction temperature range - critical for under-hood and powertrain applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 30 V - maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 33.3–36.8 V at 1.0 mA - voltage at which device enters avalanche conduction; ensures predictable turn-on during transients. |
| Clamping Voltage (VC) | 48.4 V at 62.0 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge; determines stress on downstream components. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - maximum transient energy absorption capability; enables protection against ISO 7637-2 Pulse 1 (−150 V, 2 ms). |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in harsh environments including engine control units and battery management systems. |
| ESD Withstand | 30 kV contact/air per IEC 61000-4-2 - protects against human-body-model electrostatic discharge during handling and system integration. |
| 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. |
Pinout & Package
SMC3K30CAHM3_A uses the SMC (DO-214AB) package: a two-terminal, non-polarized, surface-mount plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking is present due to bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal in unidirectional convention; functionally interchangeable in bidirectional operation | Both terminals behave identically - either can connect to line or ground; no DC bias dependency for clamping action. |
| Anode (A) | Cathode-side terminal in unidirectional convention; functionally interchangeable in bidirectional operation | Enables symmetrical clamping for AC-coupled or floating signal lines without requiring orientation-aware PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects both positive and negative transients on same line - eliminates need for dual-device configurations in differential or AC signal paths. |
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling - supports ASIL-B system integration. |
| 3000 W peak pulse power | Handles severe load dump and inductive kick events in 12 V systems without degradation - exceeds ISO 16750-2 Pulse b energy requirements. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V or 5 V logic interfaces safely within absolute maximum ratings during surge. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance - suitable for high-reliability industrial and automotive production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control modules against load dump pulses per ISO 16750-2 Pulse b (101 V, 400 ms). IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at power entry point to clamp surges before reaching LDOs and microcontrollers. Use Value: Limits rail voltage to ≤48.4 V during 62 A transients, preventing latch-up or permanent damage to downstream 40 V-rated power management ICs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to CAN or LIN buses against ISO 7637-2 Pulse 3b (150 V, 150 ns). IC Role / Device Role / Timing Role: Low-capacitance (≈120 pF at 0 V) bidirectional clamp on sensor output line, placed adjacent to connector interface. Use Value: Clamps fast-rising transients to ±42 V while preserving signal integrity - avoids distortion of mV-level sensor signals due to excessive capacitance or slow response. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Input-stage protection for USB-C PD adapters exposed to lightning-induced surges on AC mains input rectified to 30–40 V DC bus. IC Role / Device Role / Timing Role: Primary TVS on bulk capacitor input node, coordinated with MOV and fuse for staged overvoltage defense. Use Value: Absorbs 3000 W surges without thermal runaway - maintains VWM = 30 V margin above nominal 24 V adapter output, enabling reliable hold-off during brownouts. |
Use Scenario: Protection of 48 V PoE-powered equipment front-end against induced surges on Ethernet cable pairs carrying DC power. IC Role / Device Role / Timing Role: Bidirectional clamp across power pair (VDD/GND) in midspan injector or powered device, rated for continuous 48 V operation. Use Value: Withstands 30 kV ESD events and clamps 8/20 μs surges to ≤64.0 V - ensures uninterrupted operation of IEEE 802.3af/at-compliant PHYs and controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Same VWM (30 V) and bidirectional configuration, but lower PPPM (400 W) and higher VC (48.4 V @ 8.3 A); SOD-123 package (smaller footprint, lower thermal mass). | Limited to low-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 1 or load dump. | Select SMAJ30CA only for space-constrained consumer electronics where surge energy is <50 mJ and automotive qualification is not required. |
| SMCJ30CA | Identical VWM (30 V), VBR (33.3–36.8 V), and SMC package; same PPPM (3000 W) but slightly higher VC (49.9 V @ 60.1 A); also AEC-Q101 qualified. | Functionally interchangeable in all SMC-layout designs; minor clamping voltage difference has negligible impact on protected circuit margins. | SMCJ30CA is a direct functional alternative with identical mechanical fit and nearly identical electrical performance - suitable for second-source procurement without redesign. |
Compared with SMC3K30CAHM3_A, SMAJ30CA offers smaller size but insufficient surge capacity for automotive use, while SMCJ30CA provides virtually identical protection performance in the same SMC package - making it the preferred drop-in alternative when supply chain flexibility is needed.
Availability
SMC3K30CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power supplies, and sensor interface modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SMC3K30CAHM3_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 belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for AEC-Q101-compliant overvoltage protection in demanding 12 V and 24 V automotive power networks and industrial control systems.
FAQ
What is the maximum clamping voltage of SMC3K30CAHM3_A under a 10/1000 μs surge?
The SMC3K30CAHM3_A clamps to a maximum of 48.4 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 62.0 A. This value is measured per ANSI/IEEE C62.35 standards and represents the highest voltage the protected circuit will experience during such a transient event. The SMC3K30CAHM3_A maintains this clamping performance across its full operating temperature range.
Is SMC3K30CAHM3_A suitable for protecting CAN bus lines?
Yes, SMC3K30CAHM3_A is suitable for CAN bus protection when applied across the CAN_H/CAN_L differential pair or referenced to ground, provided layout minimizes parasitic inductance. Its bidirectional operation handles both polarities of ESD and fast transients, and its 120 pF junction capacitance at 0 V introduces negligible signal distortion at CAN FD speeds up to 5 Mbps. The SMC3K30CAHM3_A must be placed close to the connector with short, symmetric traces for optimal effectiveness.
Does SMC3K30CAHM3_A require derating at elevated ambient temperatures?
Yes, SMC3K30CAHM3_A requires thermal derating above TA = 25 °C. Its peak pulse power rating decreases linearly per the derating curve in Figure 1 of the datasheet, reaching ~70 % of 3000 W at 100 °C ambient. This is due to junction-to-ambient thermal resistance (RthJA) of 90 °C/W. For high-temperature applications, ensure adequate PCB copper area and consider junction temperature limits (TJ max = 175 °C) when calculating safe surge repetition rates. The SMC3K30CAHM3_A datasheet provides full derating guidance.
What does the "HM3_A" suffix indicate in SMC3K30CAHM3_A?
"HM3_A" denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified variant with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The "H" identifies the halogen-free molding compound, "M3" specifies the lead finish and plating process, and "A" indicates tape-and-reel packaging per JEDEC standards. This suffix confirms the SMC3K30CAHM3_A meets stringent automotive and industrial environmental and reliability requirements.
How does SMC3K30CAHM3_A perform under ISO 7637-2 Pulse 3a and 3b conditions?
Per Vishay's characterization data, the SMC3K30CAHM3_A clamps to −36 V and +42 V under ISO 7637-2 Pulse 3a (−220 V, 150 ns) and Pulse 3b (150 V, 150 ns), respectively. These values reflect actual measured clamping performance on a 12 V system and confirm its ability to suppress fast, high-amplitude transients common in automotive wiring harnesses. The SMC3K30CAHM3_A maintains consistent response across 5000 pulse cycles without parameter shift.
SMC3K30CAHM3_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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
SMC3K30CAHM3_A/H FAQ
1.How can I place an order for SMC3K30CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K30CAHM3_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 SMC3K30CAHM3_A/H reliable?
The price and inventory of SMC3K30CAHM3_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 SMC3K30CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K30CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K30CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K30CAHM3_A/H?
SMC3K30CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K30CAHM3_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 SMC3K30CAHM3_A/H?
For technical support, including SMC3K30CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K30CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K30CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K30CAHM3_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 SMC3K30CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K30CAHM3_A/H?
All SMC3K30CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K30CAHM3_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 SMC3K30CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K30CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K30CAHM3_A/H Tags
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