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Vishay General Semiconductor - Diodes Division 3KASMC30HE3_A/H
- Part No.:
- 3KASMC30HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30HE3_A/H.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC30HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount 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), 185 °C maximum junction temperature, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC30HE3_A/H datasheet, 3KASMC30HE3_A/H pinout, 3KASMC30HE3_A/H application, or 3KASMC30HE3_A/H equivalent, this device serves as a high-reliability clamping solution for inductive load switching transients on power rails and signal lines in harsh-temperature environments.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation, enabling stable operation up to TJ = 185 °C and meeting MSL Level 1 (260 °C reflow peak). Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and precise clamping during ESD or lightning-induced surges.
The device delivers 48.4 V maximum clamping voltage at 62.0 A peak pulse current (10/1000 µs), with only 1.0 µA reverse leakage at 30 V and 25 °C - critical for low-power sensor interface protection where standby current integrity is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 3.3 V–24 V rail protection. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and production lot. |
| PPPM | 3000 W (10/1000 µs) - Sustains high-energy transients common in automotive load-dump or inductive kick scenarios. |
| VC @ IPPM | 48.4 V at 62.0 A - Clamping voltage directly limits downstream IC stress; enables robust protection of 40 V-rated MOSFETs or controllers. |
| TJ max. | 185 °C - Supports under-hood automotive placement without derating; exceeds standard industrial temperature requirements. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per AEC specification. |
| RθJA | 77.5 °C/W - Thermal resistance informs PCB pad layout design; requires minimum recommended copper area for full 6.0 W dissipation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return path | Enables unidirectional clamping from cathode to anode; must be tied to lowest potential node in protected path. |
| Cathode | Clamping output terminal; connected to protected line (e.g., 12 V rail or CAN_H) | Reverse-biased during normal operation; conducts only when transient exceeds VWM, shunting surge to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces parameter drift over time and temperature; maintains VBR stability across 1000+ hours at 150 °C. |
| TJ = 185 °C capability | Eliminates need for thermal derating in engine-control units or powertrain modules operating near heat sources. |
| 3000 W peak pulse power (10/1000 µs) | Handles ISO 7637-2 Pulse 5a (load dump) without failure, supporting 12 V and 24 V vehicle architectures. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; no moisture sensitivity handling required. |
| Low IR (1.0 µA @ 30 V, 25 °C) | Minimizes quiescent current drain in always-on automotive modules such as body control units or telematics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between power input and bulk capacitor. Use Value: Limits voltage excursion to ≤48.4 V during 3000 W surges, preventing damage to 40 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loop) and digital I/O (CAN, LIN) from ESD and inductive coupling in factory automation sensors. IC Role / Device Role / Timing Role: Standby-mode transient suppressor on signal line, grounded at system reference. Use Value: Sub-1 ns response and 1.0 µA leakage preserve signal fidelity and battery life in low-power wireless sensor nodes. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding AC/DC adapter inputs against lightning-induced surges (IEC 61000-4-5 Level 3, 2 kV line-earth). IC Role / Device Role / Timing Role: Primary-stage TVS on secondary-side DC bus feeding telecom shelf management circuits. Use Value: 3000 W rating absorbs multi-kA surges without degradation; AEC-Q101 qualification adds long-term reliability margin beyond commercial grade. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine drive boards). IC Role / Device Role / Timing Role: Flyback clamp across motor terminals or H-bridge supply rail. Use Value: 185 °C junction rating allows mounting near motor drivers without thermal derating; DO-214AB footprint supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 33.3–37.1 V; RθJA = 110 °C/W | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load-dump or lightning events | Select when cost-sensitive, low-surge environments require smaller footprint and thermal budget permits higher junction rise. |
| SMCJ30A | Same DO-214AB (SMC) package; identical PPPM (3000 W); VBR 33.3–37.1 V; TJ max. = 175 °C; not AEC-Q101 qualified | Meets industrial but not automotive qualification requirements; lacks extended temperature validation | Choose for non-automotive industrial designs where AEC-Q101 is not mandated and 175 °C suffices. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30HE3_A/H provides superior thermal robustness (185 °C vs. 150–175 °C), automotive qualification, and tighter thermal resistance (77.5 °C/W), making it the preferred choice for under-hood and safety-critical systems requiring long-term reliability.
Availability
3KASMC30HE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom power supply input applications requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for 3KASMC30HE3_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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-qualified solutions.
The 3KASMC series is designed specifically for demanding transient suppression in automotive and industrial environments, combining high pulse power, extended junction temperature, and AEC-Q101 validation into a single DO-214AB platform.
FAQ
What is the clamping voltage of the 3KASMC30HE3_A/H at its rated peak pulse current?
The 3KASMC30HE3_A/H has a maximum clamping voltage (VC) of 48.4 V at 62.0 A peak pulse current (IPPM), measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The 3KASMC30HE3_A/H achieves this clamping performance while maintaining low incremental surge resistance.
Is the 3KASMC30HE3_A/H suitable for automotive applications?
Yes, the 3KASMC30HE3_A/H is AEC-Q101 qualified and rated for TJ = 185 °C, making it suitable for under-hood automotive applications including engine control units, body electronics, and ADAS power supplies. Its DO-214AB package meets MSL Level 1, and its 3000 W peak pulse power handles ISO 7637-2 load-dump transients. The 3KASMC30HE3_A/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What is the reverse leakage current specification for the 3KASMC30HE3_A/H at 30 V and 25 °C?
The 3KASMC30HE3_A/H exhibits a maximum reverse leakage current (IR) of 1.0 µA at VWM = 30 V and TA = 25 °C. At elevated temperature (TJ = 150 °C), leakage increases to 15 µA - still well below typical thresholds that would impact low-power sensor or always-on module operation. This low leakage is enabled by the device's passivated anisotropic rectifier structure.
Does the 3KASMC30HE3_A/H have a bidirectional configuration option?
No, the 3KASMC30HE3_A/H is unidirectional only, as confirmed in the Vishay datasheet revision 05-Mar-13. Polarity is indicated by a cathode band, and the device functions as a reverse-biased clamp. For bidirectional protection, Vishay offers separate part numbers (e.g., 3KASMC30CA), but the 3KASMC30HE3_A/H itself is strictly unidirectional and must be oriented correctly in-circuit.
What is the thermal resistance junction-to-ambient (RθJA) for the 3KASMC30HE3_A/H?
The 3KASMC30HE3_A/H has a typical thermal resistance of RθJA = 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's DO-214AB footprint guidelines. This value assumes standard FR-4 PCB with specified copper area; actual RθJA will improve with enhanced thermal pads or internal planes. The 3KASMC30HE3_A/H also specifies RθJL = 18.3 °C/W for junction-to-leads conduction.
3KASMC30HE3_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:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 56.1A
- 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)
3KASMC30HE3_A/H FAQ
1.How can I place an order for 3KASMC30HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30HE3_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 3KASMC30HE3_A/H reliable?
The price and inventory of 3KASMC30HE3_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 3KASMC30HE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC30HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30HE3_A/H?
3KASMC30HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30HE3_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 3KASMC30HE3_A/H?
For technical support, including 3KASMC30HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30HE3_A/H requirements.
6.How does Aetrix verify that 3KASMC30HE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC30HE3_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 3KASMC30HE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC30HE3_A/H?
All 3KASMC30HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30HE3_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 3KASMC30HE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC30HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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