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Vishay General Semiconductor - Diodes Division SMC3K30CAHM3/9A
- Part No.:
- SMC3K30CAHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K30CAHM3/9A.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,028
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Product details
Overview
SMC3K30CAHM3/9A from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 33.3–36.8 V breakdown voltage, and 48.4 V maximum clamping voltage at 62.0 A surge current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients.
For engineers reviewing the SMC3K30CAHM3/9A datasheet, SMC3K30CAHM3/9A pinout, SMC3K30CAHM3/9A application, or SMC3K30CAHM3/9A equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, 30 V stand-off voltage, 150 °C max junction temperature, and halogen-free RoHS-compliant construction with HM3 suffix.
Technical Context
The SMC3K30CAHM3/9A operates as a voltage-clamping TVS diode with avalanche breakdown mechanism, designed to shunt transient energy away from sensitive downstream circuitry during ESD or load-dump events. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients without thermal runaway.
It meets J-STD-020 MSL Level 1 moisture sensitivity and supports lead-free reflow up to 260 °C peak. The device is not recommended for bottom-side wave soldering due to thermal stress limitations, and its bidirectional configuration eliminates polarity marking on the SMC package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy transients common in automotive load-dump and industrial motor switching |
| Breakdown Voltage VBR | 33.3–36.8 V at 1.0 mA - defines reliable conduction onset above normal operating voltage |
| Stand-off Voltage VWM | 30 V - ensures no leakage conduction during nominal 30 V system operation |
| Maximum Clamping Voltage VC | 48.4 V at 62.0 A - limits protected circuit voltage to safe level during full-rated surge |
| Junction Temperature Range | −55 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Qualification & Compliance | AEC-Q101 qualified, UL 497B recognized (E136766), RoHS/halogen-free, JESD201 Class 2 whisker tested |
| Package | SMC (DO-214AB) - standardized 8.0 mm × 8.0 mm copper pad footprint with robust thermal dissipation |
Pinout & Package
SMC3K30CAHM3/9A uses the standard SMC (DO-214AB) surface-mount package: molded plastic case with matte tin-plated leads, 0.220–0.246 inch (5.59–6.22 mm) body width, and 0.305–0.320 inch (7.75–8.13 mm) length. Polarity is unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Both terminals are symmetric; either serves as current entry/exit depending on transient polarity |
| Anode (Cathode) | Transient current entry path | Identical terminal function to Cathode due to bidirectional construction; no functional distinction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 3000 W peak pulse power | Handles severe ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events in 12 V/24 V systems |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules per stress-test requirements |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking, simplifying SMT manufacturing flow |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates including China RoHS II and EU Directive 2011/65/EU |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from alternator load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed across input rails upstream of DC-DC converters. Use Value: Limits rail voltage to ≤48.4 V during 3000 W surges, preventing overvoltage damage to LDOs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended sensor output lines. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <1 pF capacitance at 0 V bias. |
| Consumer Power Adapter Input Stage | Telecom Line Interface Protection |
Use Scenario: Secondary-side surge protection in universal-input AC-DC adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS across DC bus after rectification, before primary controller feedback loop. Use Value: Withstands repeated 3000 W pulses without degradation, extending adapter field life in surge-prone regions. |
Use Scenario: Overvoltage protection on Ethernet PHY interface lines (e.g., PoE-powered devices) against induced surges. IC Role / Device Role / Timing Role: Bidirectional clamp on data pair lines referenced to local ground plane. Use Value: Provides symmetrical clamping (±48.4 V) without distorting 100BASE-TX signal integrity due to low CJ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K30CAHM3_A | Same electrical specs and AEC-Q101 qualification; updated suffix denotes revised internal test methodology per Vishay revision control | No functional difference; identical PCB layout and thermal profile | Preferred for new designs where latest revision compliance is required |
| SMAJ30CA | Lower 400 W peak power, SMA package (smaller thermal mass), 33.3–36.7 V VBR, 48.4 V VC | Suitable only for lower-energy transients (e.g., ESD, not load dump); limited to consumer-grade ambient conditions | Select when cost and board space constrain design, and surge threat level is below ISO 7637-2 Level III |
Compared with SMC3K30CAHM3/9A, SMC3K30CAHM3_A offers identical performance with updated process validation, while SMAJ30CA trades 87% lower surge capacity and reduced thermal robustness for compact size-making it viable only in non-automotive, low-risk applications.
Availability
SMC3K30CAHM3/9A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, consumer power adapters, and telecom line protection requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K30CAHM3/9A 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 and automotive-grade qualification.
The SMC3K30CAHM3/9A belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial controls, and infrastructure equipment.
FAQ
What does the "HM3" suffix indicate in SMC3K30CAHM3/9A?
The HM3 suffix in SMC3K30CAHM3/9A denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial-grade M3-suffix parts and confirms compliance with automotive reliability standards.
Is SMC3K30CAHM3/9A suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, SMC3K30CAHM3/9A is rated for 3000 W peak pulse power with a 10/1000 μs waveform and clamps to 48.4 V at 62.0 A-meeting the energy and voltage-limiting requirements of ISO 7637-2 Pulse 5a for 12 V systems. Its 150 °C junction rating supports under-hood deployment.
Does SMC3K30CAHM3/9A have polarity markings on the package?
No, SMC3K30CAHM3/9A is a bidirectional TVS and carries no polarity marking on the SMC (DO-214AB) package body. Both terminals are functionally identical, allowing placement without orientation concern on PCBs protecting AC or floating nodes.
What is the maximum allowable PCB temperature during reflow for SMC3K30CAHM3/9A?
The SMC3K30CAHM3/9A meets J-STD-020 MSL Level 1 and supports lead-free reflow with a maximum peak temperature of 260 °C. No floor-life limitation applies, and pre-baking is not required prior to assembly.
How does SMC3K30CAHM3/9A differ from SMC3K30CA-M3/9A?
SMC3K30CAHM3/9A includes AEC-Q101 qualification, JESD201 Class 2 whisker testing, and automotive-grade screening, whereas SMC3K30CA-M3/9A is commercial-grade with identical electrical specs but no automotive qualification. Both share the same SMC package and 30 V stand-off rating.
SMC3K30CAHM3/9A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K30CAHM3/9A FAQ
1.How can I place an order for SMC3K30CAHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K30CAHM3/9A 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 SMC3K30CAHM3/9A reliable?
The price and inventory of SMC3K30CAHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K30CAHM3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K30CAHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K30CAHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K30CAHM3/9A?
SMC3K30CAHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K30CAHM3/9A 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 SMC3K30CAHM3/9A?
For technical support, including SMC3K30CAHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K30CAHM3/9A requirements.
6.How does Aetrix verify that SMC3K30CAHM3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K30CAHM3/9A 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 SMC3K30CAHM3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K30CAHM3/9A?
All SMC3K30CAHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K30CAHM3/9A, 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 SMC3K30CAHM3/9A part is unused and in its original packaging.
Return procedure for SMC3K30CAHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K30CAHM3/9A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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