My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC30AHM3_A/H
- Part No.:
- 3KASMC30AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHM3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,504
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC30AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode 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_A/H datasheet, 3KASMC30AHM3_A/H pinout, 3KASMC30AHM3_A/H application, or 3KASMC30AHM3_A/H equivalent, this page provides verified electrical specs, DO-214AB package details, AEC-Q101 qualification status, thermal resistance data, and real-world use cases in automotive sensor power conditioning and DC bus overvoltage suppression.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 30 V standoff voltage (VWM) make it suitable for DC-biased rail protection where reverse conduction must be blocked during normal operation.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and achieves 185 °C maximum junction temperature - supporting under-hood automotive applications without derating penalties up to +150 °C ambient. Clamping voltage (VC = 48.4 V at IPPM) is specified at 62.0 A, ensuring predictable overvoltage limiting during ESD and load-dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse voltage before clamping begins; sets operating margin above nominal 24 V DC bus. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering before system damage thresholds. |
| PPPM (Peak Pulse Power) | 3000 W (10/1000 μs) - Sustains high-energy transients like ISO 7637-2 Pulse 5a without failure. |
| VC (Clamping Voltage) | 48.4 V at 62.0 A - Limits transient voltage seen by downstream MOSFET gate drivers or microcontrollers. |
| TJ max | 185 °C - Enables direct placement near heat sources (e.g., power inverters) without thermal derating loss. |
| RθJA | 77.5 °C/W - Predicts junction temperature rise under 6.0 W steady-state dissipation on standard PCB pads. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules requiring zero-failure reliability in harsh environments. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; defines clamping reference point for unidirectional operation. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term leakage stability at 150 °C ambient. |
| High-temperature capability | Rated for continuous operation up to TJ = 185 °C - eliminates need for oversized heatsinking in compact ECUs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 10605 ESD), improving clamping precision. |
| MSL Level 1 rating | Supports single-pass lead-free reflow at 260 °C without popcorn cracking or delamination. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing per stress test plan. |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump transients (ISO 7637-2 Pulse 5a) on 24 V supply lines feeding microcontroller power supplies and CAN transceivers. IC Role / Device Role / Timing Role: Unidirectional TVS diode providing primary overvoltage clamping at the input filter stage. Use Value: Clamps 3000 W surges to ≤48.4 V, preventing latch-up or burnout of 5 V LDOs and 3.3 V MCU cores. |
Use Scenario: Protects analog output lines (e.g., throttle position sensor, coolant temp sensor) from coupled transients on adjacent harnesses. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp placed at connector interface to limit voltage excursion to <50 V. Use Value: Maintains signal integrity below ADC input damage threshold while surviving repeated 1 kV EFT bursts. |
| Industrial Motor Drive DC Bus Clamp | Telecom Power Supply Input Protection |
Use Scenario: Installed across 48 V DC bus in brushless motor controllers to absorb regenerative energy spikes during rapid deceleration. IC Role / Device Role / Timing Role: High-power TVS acting as passive crowbar to divert surge current away from IGBT gate drivers. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling protection without active switching components. |
Use Scenario: Mounted at AC/DC front-end of telecom base station power supplies to suppress lightning-induced surges on -48 V return paths. IC Role / Device Role / Timing Role: Unidirectional rail clamp referenced to system ground, handling repetitive 10/1000 μs transients. Use Value: Delivers 3000 W peak power rating with <1 ns response time, meeting ITU-T K.20 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Lower PPPM (400 W), same DO-214AC (SMA) package, VWM = 30 V, VC = 48.4 V at 8.3 A | Not qualified to AEC-Q101; limited to commercial/industrial use; insufficient for automotive load-dump duty cycles | Select only for cost-sensitive non-automotive designs where peak surge energy is ≤400 W. |
| SMCJ30A | Same DO-214AB (SMC) package, AEC-Q101 qualified, PPPM = 1500 W, VC = 48.4 V at 31.0 A | Half the peak pulse power rating; suitable for lower-energy transients (e.g., ESD-only) but not ISO 7637-2 Pulse 5a | Choose when space-constrained layouts require SMC footprint but full 3000 W rating is unnecessary. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30AHM3_A/H uniquely combines AEC-Q101 qualification, 3000 W PPPM, and 185 °C TJ max in the DO-214AB package - making it the only option for high-reliability automotive power rail protection under sustained thermal stress.
Availability
3KASMC30AHM3_A/H 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, AEC-Q101 compliance, and high-temperature surge resilience.
Supply support for 3KASMC30AHM3_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 reliability and high-temperature performance.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for automotive and industrial systems demanding AEC-Q101 qualification, 185 °C operation, and 3000 W surge handling in compact SMC packages.
FAQ
What is the clamping voltage of the 3KASMC30AHM3_A/H under maximum surge conditions?
The 3KASMC30AHM3_A/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 62.0 A using a 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 transients. The 3KASMC30AHM3_A/H maintains this clamping performance across its full operating temperature range up to 185 °C junction temperature.
Is the 3KASMC30AHM3_A/H suitable for automotive applications?
Yes, the 3KASMC30AHM3_A/H is AEC-Q101 qualified and rated for TJ = 185 °C, making it fully compliant for under-hood automotive use including engine control units, transmission control modules, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 and supports lead-free reflow at 260 °C. The 3KASMC30AHM3_A/H is explicitly validated for ISO 7637-2 load-dump immunity and ESD robustness per ISO 10605.
What is the standoff voltage (VWM) and breakdown voltage (VBR) range for the 3KASMC30AHM3_A/H?
The 3KASMC30AHM3_A/H has a reverse stand-off voltage (VWM) of 30 V and a breakdown voltage (VBR) range of 33.3 V to 36.8 V at 1 mA test current. This 3.3–6.8 V margin between VWM and VBR ensures reliable blocking during normal 24 V system operation while guaranteeing consistent avalanche initiation during overvoltage events. The 3KASMC30AHM3_A/H datasheet specifies these values at TA = 25 °C with derating curves provided for elevated temperatures.
Does the 3KASMC30AHM3_A/H have a unidirectional or bidirectional configuration?
The 3KASMC30AHM3_A/H is a unidirectional TVS diode, as confirmed in the Vishay datasheet "Features" section and electrical characteristics table. It conducts only in reverse bias above VBR and blocks forward current like a standard rectifier. This configuration is intended for DC power rail protection where polarity is fixed - such as 24 V battery feeds in automotive systems. The 3KASMC30AHM3_A/H cathode is marked by a color band on the DO-214AB package body.
What package type and mounting specifications apply to the 3KASMC30AHM3_A/H?
The 3KASMC30AHM3_A/H uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Its mechanical outline matches JEDEC DO-214AB dimensions: 7.11 mm × 6.22 mm × 2.41 mm. The recommended pad layout is defined in the datasheet, and the device meets UL 94 V-0 flammability rating. The 3KASMC30AHM3_A/H is supplied in 7″ tape-and-reel (H code) with 850 units per reel.
3KASMC30AHM3_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)
3KASMC30AHM3_A/H FAQ
1.How can I place an order for 3KASMC30AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHM3_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 3KASMC30AHM3_A/H reliable?
The price and inventory of 3KASMC30AHM3_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 3KASMC30AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHM3_A/H?
3KASMC30AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHM3_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 3KASMC30AHM3_A/H?
For technical support, including 3KASMC30AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC30AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHM3_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 3KASMC30AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHM3_A/H?
All 3KASMC30AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHM3_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 3KASMC30AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC30AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHM3_A/H 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 …
