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Vishay General Semiconductor - Diodes Division 3KASMC30AHE3_B/H
- Part No.:
- 3KASMC30AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHE3_B/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,385
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Product details
Overview
3KASMC30AHE3_B/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 clamping 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 operates up to +185 °C junction temperature - enabling robust protection of 30 V nominal DC systems such as automotive body control modules and industrial PLC I/O circuits.
For engineers reviewing the 3KASMC30AHE3_B/H datasheet, 3KASMC30AHE3_B/H pinout, 3KASMC30AHE3_B/H application, or 3KASMC30AHE3_B/H equivalent, key selection criteria include its 30 V stand-off voltage, 33.3–36.8 V breakdown range at 1 mA, unidirectional polarity, AEC-Q101 qualification, and SMC package thermal performance with RθJA = 77.5 °C/W.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and high-temperature operation. Its 185 °C maximum junction temperature and MSL Level 1 rating support reflow soldering at 260 °C peak and long-term reliability in under-hood automotive environments.
The device exhibits low incremental surge resistance and fast response time, enabling effective suppression of transients induced by inductive load switching (e.g., solenoid drivers) and ESD events on 30 V supply lines. Clamping voltage is specified at 48.4 V for 62.0 A (10/1000 μs), with typical VBR temperature coefficient of +0.090 %/°C.
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 30 V systems. |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V at 1 mA - Ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC @ IPPM | ≤48.4 V at 62.0 A - Limits downstream component stress during worst-case 3000 W surge events. |
| PPPM | 3000 W (10/1000 μs) - Supports high-energy transients per ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Level 4. |
| TJ max | +185 °C - Enables deployment in high-ambient locations like engine compartments without derating. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected circuit ground or low-side return path; must handle full surge current. |
| Cathode | Current exit terminal during clamping | Connected to protected line (e.g., 30 V rail); polarity marking ensures correct orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces leakage drift and improves long-term stability under thermal cycling and humidity exposure. |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in 12/24/30 V automotive and industrial power distribution networks. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision and system immunity. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use with guaranteed reliability across temperature, humidity, and mechanical stress tests. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects microcontroller I/O and power supply inputs from load dump and inductive kickback in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 30 V battery rail and local LDO/regulator input. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs during ISO 7637-2 Pulse 5a (load dump) events up to 60 V. | Use Scenario: Shields 24–30 V digital input channels from field-wiring surges caused by relay coil de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage protection element on channel-level front-end, upstream of optocoupler or signal conditioner. Use Value: Limits transient voltage to ≤48.4 V, ensuring compatibility with standard 50 V-rated input protection circuitry and maintaining SIL-2 functional safety margins. |
| Telecom Power Supply Front-End | EV Onboard Charger (OBC) Auxiliary Rail |
Use Scenario: Guards AC/DC converter primary-side bias rails against line-to-line and line-to-ground surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level clamping device after MOV-based primary protection, handling residual fast transients. Use Value: Provides precise, low-leakage clamping (≤1 μA at 30 V) without loading the 30 V auxiliary supply during normal operation. | Use Scenario: Safeguards 30 V auxiliary power rail feeding gate drivers and MCU in high-voltage EV charging systems. IC Role / Device Role / Timing Role: High-reliability TVS on isolated 30 V secondary side, operating continuously at elevated ambient temperatures. Use Value: Maintains clamping integrity up to +185 °C junction temperature, supporting OBC thermal design without derating or forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3_A/H | Lower PPPM (600 W), same VWM/VBR, SMB package (smaller footprint, higher RθJA) | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not ISO 7637-2 Pulse 5a | Select when space-constrained and surge energy is limited to ≤600 W. |
| SMCJ30AHE3_A/H | Same PPPM (3000 W), identical VWM/VBR, same SMC package, but non-AEC-Q101 rated | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated | Select when AEC-Q101 is unnecessary and cost optimization is prioritized. |
Compared with SMBJ30AHE3_A/H and SMCJ30AHE3_A/H, the 3KASMC30AHE3_B/H uniquely combines 3000 W surge capability, AEC-Q101 qualification, and 185 °C operation - making it the only option qualified for high-energy, high-temperature automotive power rail protection without derating.
Availability
3KASMC30AHE3_B/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital input protection, and telecom power supply front-end designs requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC30AHE3_B/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, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-grade performance.
The 3KASMCxxA family is engineered specifically for high-energy transient suppression in harsh-environment applications - targeting automotive power distribution, industrial automation, and telecom infrastructure where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC30AHE3_B/H under maximum surge conditions?
The 3KASMC30AHE3_B/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 62.0 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 48.4 V during worst-case transient events. The 3KASMC30AHE3_B/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC30AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC30AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix HE3. It meets all required stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The 3KASMC30AHE3_B/H is explicitly designated for automotive use in the datasheet and supports under-hood deployment up to +185 °C junction temperature.
What does the 'HE3_B/H' suffix indicate in 3KASMC30AHE3_B/H?
The 'HE3' suffix denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. 'B/H' specifies revision level 'B' and packaging in 7-inch plastic tape and reel (850 units per reel). The 3KASMC30AHE3_B/H is distinct from HM3 variants, which add halogen-free material compliance while retaining identical electrical and thermal specifications.
Can the 3KASMC30AHE3_B/H be used in bidirectional configurations?
No, the 3KASMC30AHE3_B/H is unidirectional only, as clearly stated in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. It conducts in reverse-bias mode during overvoltage events and blocks forward current. For bidirectional protection, two 3KASMC30AHE3_B/H devices must be connected in series opposing configuration - but this is not recommended due to increased forward voltage drop and layout complexity. Use dedicated bidirectional TVS parts instead.
What is the thermal resistance of the 3KASMC30AHE3_B/H, and how does it affect PCB layout?
The 3KASMC30AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per the datasheet. To maintain safe junction temperature under 3000 W surge duty, ensure adequate copper area (≥100 mm² per terminal) and avoid thermal bottlenecks. The 3KASMC30AHE3_B/H's RθJL of 18.3 °C/W indicates efficient heat conduction to PCB leads, so optimizing trace width and via count beneath terminals directly improves thermal performance.
3KASMC30AHE3_B/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:
- 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):
- 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 (SMC)
3KASMC30AHE3_B/H FAQ
1.How can I place an order for 3KASMC30AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHE3_B/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_B/H reliable?
The price and inventory of 3KASMC30AHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHE3_B/H?
3KASMC30AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHE3_B/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_B/H?
For technical support, including 3KASMC30AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC30AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHE3_B/H?
All 3KASMC30AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for 3KASMC30AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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