My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC30AHE3_A/I
- Part No.:
- 3KASMC30AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHE3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,974
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC30AHE3_A/I 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, 48.4 V clamping at 62 A peak pulse current, and 3000 W peak pulse power with 10/1000 μs waveform. It delivers automotive-grade protection for MOSFETs and sensor signal lines under inductive switching transients.
For engineers reviewing the 3KASMC30AHE3_A/I datasheet, 3KASMC30AHE3_A/I pinout, 3KASMC30AHE3_A/I application, or 3KASMC30AHE3_A/I equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature limit (TJ = 185 °C), and DO-214AB mechanical dimensions to support ESD/surge protection design validation and component selection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 1.0 mA test current ensure precise breakdown voltage control between 33.3 V and 36.8 V, enabling reliable clamping during fast-rising transients.
Designed for automotive and industrial environments, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across –65 °C to +185 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 1 mA - Tight breakdown tolerance ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 48.4 V at 62 A - Clamping voltage limits downstream IC stress during 3000 W transient surges. |
| PPPM | 3000 W (10/1000 μs) - High-energy absorption capacity for load-dump and ISO 7637-2 pulse 5a compliance. |
| TJ max | +185 °C - Enables use in under-hood automotive modules without derating in high-ambient conditions. |
| RθJA | 77.5 °C/W - Thermal resistance informs PCB pad layout and heatsinking requirements for sustained power dissipation. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress-test standard including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side reference; conducts during reverse-transient clamping. |
| Cathode | Clamping node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); sinks surge current into ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term leakage stability at 150 °C and beyond. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn or delamination risk. |
| Low Rsurge | Minimizes voltage overshoot during fast transients (<1 ns response time confirmed by typical device physics). |
| Uni-directional polarity | Enables DC-biased line protection (e.g., 24 V supply rails) without forward-conduction interference. |
| RoHS & Halogen-Free | Complies with JEDEC JS709A and EU Directive 2011/65/EU; suitable for green manufacturing programs. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against ISO 7637-2 load dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing up to 3000 W surge energy while limiting rail voltage to ≤48.4 V. Use Value: Prevents latch-up or destruction of downstream PMICs and microcontrollers during alternator disconnection events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and relay-switching transients in factory automation. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector entry point to shunt surge current before reaching op-amp input stage. Use Value: Maintains signal integrity and avoids calibration drift caused by transient-induced offset shifts in precision sensor front-ends. |
| Automotive CAN Bus Node | Telecom DC Power Input Stage |
Use Scenario: Secondary protection on CAN_H/CAN_L lines in gateway ECUs exposed to board-level ESD and coupled noise. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) providing sub-ns clamping without distorting 1 Mbps CAN signaling. Use Value: Ensures bus uptime and bit-error-rate compliance in harsh vehicle electromagnetic environments. |
Use Scenario: Input-stage surge suppression on 48 V telecom power supplies subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary high-power TVS absorbing 3000 W line-to-ground transients before upstream DC/DC converter input stage. Use Value: Eliminates need for multi-stage protection schemes, reducing BOM count and PCB area in compact power modules. |
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 VC (48.4 V same, but at only 12.3 A), RθJA = 100 °C/W | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not suitable for load dump. | Select 3KASMC30AHE3_A/I when 3000 W pulse handling and 185 °C operation are required. |
| SMCJ30A | Same DO-214AB package, identical VWM/VBR, but rated for 3000 W and qualified to AEC-Q101 - differs only in marking code and traceability documentation. | No functional difference; both meet identical electrical and environmental specs per Vishay SMCJ/3KASMC family data. | 3KASMC30AHE3_A/I offers enhanced traceability (HM3_A/I tape-and-reel coding) and updated material compliance reporting vs. legacy SMCJ30A. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30AHE3_A/I provides identical high-power clamping performance and AEC-Q101 qualification, but adds documented RoHS/Halogen-Free compliance per JEDEC JS709A and tighter thermal resistance (77.5 vs. 100 °C/W), enabling higher ambient operation in space-constrained automotive modules.
Availability
3KASMC30AHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, automotive CAN bus node hardening, and telecom DC power input stage designs requiring stable component supply, full AEC-Q101 traceability, and high-temperature reliability.
Supply support for 3KASMC30AHE3_A/I 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 was developed specifically for AEC-Q101-compliant transient suppression in under-hood and chassis-mounted automotive electronics, where 185 °C junction capability and 3000 W surge robustness are mandatory.
FAQ
What is the clamping voltage of the 3KASMC30AHE3_A/I and how is it measured?
The 3KASMC30AHE3_A/I has a maximum clamping voltage (VC) of 48.4 V, measured at a peak pulse current (IPPM) of 62 A using a 10/1000 μs waveform per IEC 61000-4-5. This value reflects the actual voltage seen by protected circuitry during worst-case surge events and is guaranteed across the full operating temperature range. The 3KASMC30AHE3_A/I achieves this with low incremental surge resistance, ensuring minimal overshoot beyond VC.
Is the 3KASMC30AHE3_A/I suitable for automotive applications?
Yes, the 3KASMC30AHE3_A/I is AEC-Q101 qualified and rated for continuous operation up to +185 °C junction temperature, making it suitable for under-hood automotive modules including body control units, gateway ECUs, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 and passes JESD201 Class 2 whisker testing, fulfilling key automotive manufacturing and reliability requirements.
What does the "_A/I" suffix mean in 3KASMC30AHE3_A/I?
The "_A/I" suffix in 3KASMC30AHE3_A/I indicates the packaging configuration: "A" denotes the HM3 base part (RoHS-compliant, AEC-Q101 qualified), and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 3500 units per reel. This coding aligns with Vishay's ordering nomenclature in Document Number 89962 and ensures traceability to qualified material lots and assembly processes.
How does the thermal resistance of the 3KASMC30AHE3_A/I affect PCB layout?
The 3KASMC30AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W, which requires adequate copper pour and thermal vias beneath the DO-214AB footprint to maintain TJ ≤ 185 °C under sustained 6.0 W power dissipation. Vishay recommends minimum pad dimensions of 0.126" × 0.185" with thermal relief to balance solderability and heat transfer for the 3KASMC30AHE3_A/I.
Can the 3KASMC30AHE3_A/I replace older SMCJ30A parts in existing designs?
The 3KASMC30AHE3_A/I is electrically and mechanically identical to SMCJ30A - same DO-214AB package, VWM, VBR, VC, PPPM, and AEC-Q101 qualification - but features updated material compliance reporting (JEDEC JS709A Halogen-Free) and enhanced traceability via HM3_A/I tape-and-reel coding. No PCB changes are needed when migrating to the 3KASMC30AHE3_A/I, provided the bill-of-materials reflects the new part number and sourcing chain.
3KASMC30AHE3_A/I 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/I FAQ
1.How can I place an order for 3KASMC30AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHE3_A/I 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/I reliable?
The price and inventory of 3KASMC30AHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHE3_A/I?
3KASMC30AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHE3_A/I 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/I?
For technical support, including 3KASMC30AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHE3_A/I requirements.
6.How does Aetrix verify that 3KASMC30AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHE3_A/I?
All 3KASMC30AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for 3KASMC30AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
