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Vishay General Semiconductor - Diodes Division 3KASMC30AHM3/57T
- Part No.:
- 3KASMC30AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHM3/57T.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,222
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Product details
Overview
3KASMC30AHM3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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 MOSFETs and ICs against inductive switching transients in engine control units and motor drives.
For engineers reviewing the 3KASMC30AHM3/57T datasheet, 3KASMC30AHM3/57T pinout, 3KASMC30AHM3/57T application, or 3KASMC30AHM3/57T equivalent, key selection criteria include its 30 V stand-off voltage, AEC-Q101 qualification, DO-214AB (SMC) package thermal performance, and verified clamping behavior under repetitive surge stress per JESD22-B102 and J-STD-020 MSL Level 1.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture provides fast response time (<1 ns) and precise reverse-biased clamping without forward conduction during normal operation.
Rated for 185 °C maximum junction temperature and qualified to AEC-Q101, the 3KASMC30AHM3/57T supports automotive-grade reliability under thermal cycling and humidity exposure. Its 77.5 °C/W junction-to-ambient thermal resistance assumes mounting on minimum recommended pad layout per Vishay specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 30 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| Breakdown Voltage (VBR) | 33.3–36.8 V at 1.0 mA - Ensures reliable turn-on within tight tolerance before destructive overvoltage occurs. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Sustains high-energy transients like ISO 7637-2 Pulse 5a without degradation. |
| Clamping Voltage (VC) | 48.4 V at 62.0 A - Limits downstream voltage stress to protect 40 V-rated MOSFETs and logic interfaces. |
| Junction Temperature Range | −65 °C to +185 °C - Enables deployment in under-hood ECUs and industrial inverters with no derating up to 150 °C ambient. |
| Surge Current (IPPM) | 62.0 A (10/1000 μs) - Validates immunity to load dump and inductive kick events per SAE J1113-11. |
| Thermal Resistance (RθJA) | 77.5 °C/W - Requires PCB copper area ≥0.126″ × 0.185″ (3.2 mm × 4.7 mm) for thermal compliance at full power. |
Pinout & Package
Package: DO-214AB (SMC), RoHS-compliant, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode during surge. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., battery rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including powertrain and body control modules per stress test requirements. |
| 185 °C junction rating | Eliminates derating in high-temp environments such as engine compartments and industrial motor controllers. |
| 3000 W peak pulse power | Handles ISO 16750-2 load dump surges and SAE J1113-11 inductive switch transients without failure. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast-rising transients, preserving signal integrity on sensitive inputs. |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without dry pack or baking, reducing manufacturing cost and cycle time. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protection of microcontroller power supply and gate driver circuits against alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and local regulator input. Use Value: Clamps 48.4 V at 62 A to prevent damage to 5 V LDOs and 3.3 V MCU cores during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding IGBT gate drivers and current-sense amplifiers from commutation spikes on 300–400 V DC bus lines. IC Role / Device Role / Timing Role: High-power transient suppressor mounted directly across bus rail and ground plane. Use Value: Limits voltage overshoot to ≤48.4 V during 62 A surge, maintaining gate oxide integrity and analog measurement accuracy. |
| Telecom Power Supply Input | Consumer Appliance Main Board |
Use Scenario: Input-stage protection for AC/DC front-end converters exposed to lightning-induced surges on PoE or AC mains lines. IC Role / Device Role / Timing Role: Primary-level TVS in series with fuse and common-mode choke on secondary-side DC output. Use Value: Absorbs 3000 W pulses without thermal runaway, ensuring continuity of 48 V telecom equipment during EN 61000-4-5 testing. |
Use Scenario: Surge suppression on main board power rails of washing machines and HVAC controllers subject to relay contact bounce and pump motor back-EMF. IC Role / Device Role / Timing Role: Standoff-rated protector on 24 V auxiliary supply feeding MCU and display interface. Use Value: Withstands repeated 62 A surges at 185 °C junction temperature, extending field life beyond 10 years in harsh home environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Lower PPPM (400 W), higher RθJA (110 °C/W), same DO-214AC (SMA) footprint but smaller thermal mass. | Not AEC-Q101 qualified; limited to consumer/industrial use below 150 °C ambient. | Select SMAJ30A only for cost-sensitive non-automotive designs where surge energy is <10% of 3KASMC30AHM3/57T capability. |
| SMCJ30A | Same DO-214AB (SMC) package and 3000 W rating, but lower TJ max (175 °C) and no AEC-Q101 certification. | Acceptable for industrial motor drives but not approved for automotive safety-critical systems per OEM requirements. | Choose SMCJ30A when AEC-Q101 is not mandated and 10 °C junction margin reduction is acceptable. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30AHM3/57T provides superior thermal endurance (185 °C), automotive qualification, and tighter clamping (48.4 V vs. ≥53 V for SMCJ30A), making it the only option for under-hood ECU protection requiring zero derating at 125 °C ambient.
Availability
3KASMC30AHM3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive DC buses, and telecom power supply inputs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for 3KASMC30AHM3/57T 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC30AHM3/57T belongs to Vishay's PAR® TVS family engineered specifically for high-temperature, high-surge automotive power rail protection - emphasizing AEC-Q101 compliance, 185 °C operation, and repeatable clamping performance under thermal stress.
FAQ
What is the clamping voltage of the 3KASMC30AHM3/57T at its rated peak pulse current?
The 3KASMC30AHM3/57T clamps at 48.4 V when subjected to its specified peak pulse current of 62.0 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay Document Number 89962, ensuring predictable overvoltage limiting for downstream 40 V-rated components. The 3KASMC30AHM3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC30AHM3/57T qualified for automotive applications?
Yes, the 3KASMC30AHM3/57T is fully AEC-Q101 qualified per Vishay's documentation and meets all stress test requirements for automotive electronics, including temperature cycling, humidity bias, and mechanical shock. Its 185 °C junction rating and DO-214AB packaging make the 3KASMC30AHM3/57T suitable for engine control units, body control modules, and ADAS power supplies.
What package type does the 3KASMC30AHM3/57T use, and what are its key assembly features?
The 3KASMC30AHM3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD22-B102. It is rated MSL Level 1 (peak reflow 260 °C) and passes JESD201 Class 2 whisker testing. The 3KASMC30AHM3/57T requires minimum pad dimensions of 0.126″ × 0.185″ for thermal reliability.
How does the 3KASMC30AHM3/57T compare to standard SMAJ-series TVS diodes?
The 3KASMC30AHM3/57T delivers 7.5× higher peak pulse power (3000 W vs. 400 W for SMAJ30A), 185 °C junction rating (vs. 150 °C), and AEC-Q101 qualification - features absent in SMAJ-series devices. Unlike the SMAJ30A, the 3KASMC30AHM3/57T uses DO-214AB for superior thermal dissipation and is validated for automotive under-hood deployment.
What is the maximum reverse leakage current of the 3KASMC30AHM3/57T at its stand-off voltage?
At 30 V stand-off voltage (VWM) and 25 °C ambient, the 3KASMC30AHM3/57T exhibits a maximum reverse leakage current of 1.0 μA. At elevated temperature (TJ = 150 °C), leakage increases to 15 μA - a value explicitly specified in Vishay Document Number 89962 and critical for low-power always-on automotive circuits. This parameter is guaranteed for every 3KASMC30AHM3/57T unit.
3KASMC30AHM3/57T 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)
3KASMC30AHM3/57T FAQ
1.How can I place an order for 3KASMC30AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHM3/57T 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 3KASMC30AHM3/57T reliable?
The price and inventory of 3KASMC30AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC30AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHM3/57T?
3KASMC30AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHM3/57T 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 3KASMC30AHM3/57T?
For technical support, including 3KASMC30AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC30AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHM3/57T 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 3KASMC30AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHM3/57T?
All 3KASMC30AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHM3/57T, 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 3KASMC30AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC30AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHM3/57T Tags
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