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Vishay General Semiconductor - Diodes Division 3KASMC30AHE3_A/H
- Part No.:
- 3KASMC30AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHE3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,150
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Product details
Overview
3KASMC30AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 30 V stand-off voltage, 33.3–36.8 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 µs), 62.0 A peak surge current, and 48.4 V clamping voltage at IPPM - deployed for automotive power line and sensor signal line protection.
For engineers reviewing the 3KASMC30AHE3_A/H datasheet, 3KASMC30AHE3_A/H pinout, 3KASMC30AHE3_A/H application, or 3KASMC30AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C operation, MSL Level 1 compliance, and DO-214AB thermal performance under high-energy transients.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress at junction temperatures up to 185 °C. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and lightning-induced transients on DC power rails and low-voltage signal paths.
The device operates exclusively in unidirectional mode with cathode band marking, requires no bias circuitry, and is optimized for mounting on minimum recommended SMC pad layout per J-STD-020. Thermal resistance is 77.5 °C/W (junction-to-ambient) and 18.3 °C/W (junction-to-leads), enabling robust derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 36 V nominal systems. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - verified breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 48.4 V - clamping voltage at 62.0 A peak pulse; limits transient overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 3000 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy automotive load dump events. |
| TJ max. | 185 °C - enables use in under-hood automotive modules without thermal derating penalties up to extreme ambient conditions. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard. |
| MSL Level | Level 1 (260 °C peak reflow) - supports standard lead-free SMT assembly without moisture sensitivity concerns. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during reverse transient events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., battery rail or sensor output); conducts surge current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage (<1.0 µA at VWM) and long-term reliability at 185 °C. |
| Clamping performance | 48.4 V VC at 62.0 A IPPM provides predictable overvoltage limiting for 3.3 V/5 V/12 V logic and power stages. |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) supports repeated motor driver switching and alternator load dump recovery. |
| Automotive qualification | AEC-Q101 certification covers HTGB, HTRB, TCT, and ESD testing - required for front-end power electronics in vehicles. |
| Thermal design support | RθJA = 77.5 °C/W and RθJL = 18.3 °C/W enable accurate PCB thermal modeling for high-power density layouts. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power input and ground, activated within nanoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or gate oxide damage in MCU power supplies and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs from EMI and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS connected across differential or single-ended signal lines to chassis ground. Use Value: Maintains signal integrity below 1 MHz while suppressing >1 kV fast transients without loading the sensor output impedance. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Stage |
Use Scenario: Safeguarding PoE-powered switch ports and base station DC inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input bus, coordinated with upstream fuses and secondary-stage MOVs. Use Value: Absorbs 3000 W peak energy without degradation, meeting IEC 61000-4-5 Level 4 requirements for telecom infrastructure. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback during PWM commutation. Use Value: Withstands 200 A IFSM pulses and maintains clamping stability after 10⁴+ cycles, extending MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same DO-214AC (SMA) package; lower PPPM (400 W), higher RθJA (110 °C/W), VBR = 33.3–37.1 V. | Limited to low-energy consumer interfaces; unsuitable for automotive load dump or industrial 200 A surge events. | Select only for cost-sensitive, non-automotive designs where 3000 W capability is unnecessary. |
| SMCJ30A | Same DO-214AB (SMC) package; identical VWM/VBR/VC specs, but rated for 3000 W and AEC-Q101 qualified only in HM3 suffix variants. | Functionally interchangeable in layout and clamping behavior; differs in material categorization and whisker test compliance (HM3_X vs. HM3_A/H). | Valid alternative if HM3_A/H suffix is unavailable; verify revision code and RoHS/AEC documentation match project requirements. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30AHE3_A/H delivers superior thermal robustness (RθJL = 18.3 °C/W), guaranteed AEC-Q101 qualification for automotive, and tighter manufacturing control under Vishay's PAR® platform - making it preferred for mission-critical power rail protection where surge repetition and junction temperature stability are design constraints.
Availability
3KASMC30AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom DC power systems, and consumer appliance motor drives requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 3KASMC30AHE3_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 high-reliability, high-temperature, and automotive-qualified components.
The 3KASMC series belongs to Vishay's PAR® (Passivated Anisotropic Rectifier) TVS platform, engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial power systems.
FAQ
What is the polarity configuration of the 3KASMC30AHE3_A/H?
The 3KASMC30AHE3_A/H is a unidirectional TVS diode, with the cathode marked by a color band on the DO-214AB (SMC) package body. It conducts only during reverse-biased overvoltage events and blocks forward current like a standard rectifier - essential for protecting positive-rail circuits without interfering with normal DC operation.
Is the 3KASMC30AHE3_A/H qualified for automotive applications?
Yes, the 3KASMC30AHE3_A/H is AEC-Q101 qualified and rated for TJ = 185 °C operation, making it suitable for under-hood and powertrain-related automotive modules. Its qualification includes high-temperature reverse bias (HTRB), temperature cycling (TCT), and electrostatic discharge (ESD) testing per the AEC standard.
What is the clamping voltage of the 3KASMC30AHE3_A/H at its rated peak pulse current?
The 3KASMC30AHE3_A/H has a maximum clamping voltage (VC) of 48.4 V at its rated peak pulse current (IPPM) of 62.0 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does the 3KASMC30AHE3_A/H meet moisture sensitivity level requirements for SMT assembly?
Yes, the 3KASMC30AHE3_A/H meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. No dry-pack or baking is required prior to standard lead-free reflow soldering, simplifying manufacturing flow for high-volume production.
How does the thermal resistance of the 3KASMC30AHE3_A/H impact PCB layout decisions?
The 3KASMC30AHE3_A/H has RθJA = 77.5 °C/W and RθJL = 18.3 °C/W, indicating that copper pour area under the leads significantly improves heat dissipation. Layouts should follow Vishay's recommended DO-214AB pad dimensions (0.126" min. width, 0.185" max. length) to achieve specified thermal performance and avoid exceeding TJ = 185 °C under sustained surge duty.
3KASMC30AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 62A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
3KASMC30AHE3_A/H FAQ
1.How can I place an order for 3KASMC30AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHE3_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 3KASMC30AHE3_A/H reliable?
The price and inventory of 3KASMC30AHE3_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 3KASMC30AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHE3_A/H?
3KASMC30AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHE3_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 3KASMC30AHE3_A/H?
For technical support, including 3KASMC30AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC30AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHE3_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 3KASMC30AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHE3_A/H?
All 3KASMC30AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHE3_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 3KASMC30AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC30AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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