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Vishay General Semiconductor - Diodes Division SMCJ30AHM3_A/H
- Part No.:
- SMCJ30AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30AHM3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,330
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Product details
Overview
SMCJ30AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 30 V standoff voltage, 48.4 V clamping voltage at 31 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMCJ30AHM3_A/H datasheet, SMCJ30AHM3_A/H pinout, SMCJ30AHM3_A/H application, or SMCJ30AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction, 1500 W 10/1000 μs surge capability, and verified clamping performance under standardized transient waveforms.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 30 V standoff, it avalanches to clamp transients at ≤48.4 V while diverting up to 31 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at 30 V), and thermal resistance of 75 °C/W enables reliable operation up to 150 °C junction temperature.
Designed for automated SMT assembly, the SMCJ30AHM3_A/H features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, meets MSL Level 1 per J-STD-020, and supports reflow profiles with peak temperature up to 260 °C - critical for high-volume automotive PCB manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 30 V - maximum continuous reverse operating voltage before clamping begins |
| Clamping Voltage (VC) | 48.4 V at 31 A IPPM - limits transient voltage seen by protected circuitry |
| Peak Pulse Power (PPPM) | 1500 W - energy-handling capacity for 10/1000 μs waveform per IEEE C62.35 |
| Breakdown Voltage (VBR) | 33.3–36.8 V at 1 mA - precise avalanche initiation range for predictable turn-on |
| Junction Temperature Range | −55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Leakage Current (ID) | ≤1.0 μA at 30 V - minimal standby power loss and signal integrity impact |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
SMCJ30AHM3_A/H uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode indicated by a band on the body. The package measures 7.11 mm × 6.22 mm × 2.62 mm and requires 8.0 mm × 8.0 mm copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage event |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements for green electronics manufacturing |
| Low incremental surge resistance | Enables tighter clamping (48.4 V) and faster response to sub-nanosecond transients |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and compatibility with standard reflow soldering without dry-baking |
| Glass passivated junction | Ensures stable VBR over time and improved resistance to humidity and contamination |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across power input prior to DC-DC converter. Use Value: Clamps 100 V/100 ms load dump spikes to ≤48.4 V, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to long harnesses. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS placed between signal line and ground. Use Value: Limits ESD (IEC 61000-4-2) and cable discharge events to <50 V, preserving ADC accuracy and sensor calibration stability. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC-DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5–20 V output rail to absorb flyback spikes from transformer leakage inductance. Use Value: Maintains regulated output within ±5% during 1500 W surge events, avoiding brownout resets in connected devices. | Use Scenario: Primary protection for Ethernet PHY interfaces exposed to induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage shunt device on MDI lines before common-mode chokes and integrated magnetics. Use Value: Absorbs >90% of 10/1000 μs telecom surge energy (ITU-T K.21), reducing stress on secondary protection ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3_A/H | Lower PPPM (400 W), same VWM (30 V), SMA package (smaller footprint, lower thermal mass) | Suitable only for lower-energy transients; not rated for automotive load dump | Select when space-constrained and surge energy is limited to <400 W |
| SMCJ30AHE3_A/H | Same electrical specs but commercial-grade (non-AEC-Q101), RoHS-compliant without halogen-free certification | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated | Select for cost-sensitive non-automotive designs requiring identical clamping performance |
Compared with SMCJ30AHM3_A/H, SMAJ30AHE3_A/H offers reduced surge handling in a smaller package, while SMCJ30AHE3_A/H provides identical protection without halogen-free compliance or AEC-Q101 validation - enabling trade-offs between automotive qualification, environmental compliance, and board area.
Availability
SMCJ30AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom line cards requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ30AHM3_A/H 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMCJ series was developed for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against repetitive surges and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMCJ30AHM3_A/H at its rated peak pulse current?
The SMCJ30AHM3_A/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 31 A under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience voltages exceeding 48.4 V during such transient events. The SMCJ30AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMCJ30AHM3_A/H qualified for automotive applications?
Yes, SMCJ30AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88394. This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics. The SMCJ30AHM3_A/H meets all requirements for use in engine control modules, body controllers, and ADAS power supplies.
What does the "HM3" suffix indicate in SMCJ30AHM3_A/H?
The "HM3" suffix in SMCJ30AHM3_A/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. Per Vishay's ordering nomenclature, "H" indicates the tape-and-reel packaging variant (7-inch reel, 850 units), "M3" specifies halogen-free molding compound and plating, and the underscore "_A/H" reflects revision level and reel size coding. This distinguishes SMCJ30AHM3_A/H from commercial variants like SMCJ30A-E3 or non-halogen-free AEC-Q101 versions.
How does SMCJ30AHM3_A/H differ from bidirectional SMCJ30CA variants?
SMCJ30AHM3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMCJ30CA is bidirectional, symmetric in both directions, and used in AC-coupled or floating signal paths. Their VWM (30 V), VC (48.4 V), and PPPM (1500 W) are identical, but SMCJ30AHM3_A/H cannot replace SMCJ30CA in AC applications without circuit redesign due to polarity dependence.
What thermal design guidance applies to SMCJ30AHM3_A/H on PCB?
For rated 1500 W pulse handling, SMCJ30AHM3_A/H requires mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay datasheet 88394. Its thermal resistance RθJA is 75 °C/W under these conditions; reducing pad area increases junction temperature rise and de-rates surge capability. The SMCJ30AHM3_A/H also has RθJL = 15 °C/W, supporting heat transfer through leads to internal ground planes in multilayer boards.
SMCJ30AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ30AHM3_A/H FAQ
1.How can I place an order for SMCJ30AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30AHM3_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 SMCJ30AHM3_A/H reliable?
The price and inventory of SMCJ30AHM3_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 SMCJ30AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ30AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30AHM3_A/H?
SMCJ30AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30AHM3_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 SMCJ30AHM3_A/H?
For technical support, including SMCJ30AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ30AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ30AHM3_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 SMCJ30AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ30AHM3_A/H?
All SMCJ30AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30AHM3_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 SMCJ30AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ30AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30AHM3_A/H Tags
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