My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC30AHM3_A/I
- Part No.:
- 3KASMC30AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHM3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,013
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC30AHM3_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, 48.4 V clamping voltage at 62 A peak pulse current, 3000 W peak pulse power (10/1000 μs), and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 3KASMC30AHM3_A/I datasheet, 3KASMC30AHM3_A/I pinout, 3KASMC30AHM3_A/I application, or 3KASMC30AHM3_A/I equivalent, this device serves as a high-reliability, high-temperature (TJ = 185 °C) surge protector for DC power rails and signal lines exposed to inductive switching transients in automotive ECUs, industrial motor drives, and sensor interfaces.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress and high ambient temperature operation. Its unidirectional polarity and low incremental surge resistance enable precise clamping with minimal overshoot during fast-rising transients.
Designed per ANSI/IEEE C62.35 standards, it delivers stable clamping performance across -65 °C to +185 °C operating junction temperature range and meets J-STD-020 MSL Level 1 (260 °C peak reflow), supporting robust automated assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on above system overvoltage thresholds. |
| VC @ IPPM | 48.4 V - Clamping voltage at 62 A peak pulse current (10/1000 μs); limits downstream IC stress during worst-case surge events. |
| PPPM | 3000 W - Peak pulse power handling capability; supports protection against ISO 7637-2 Pulse 1/2a/5a and similar automotive transients. |
| TJ max. | +185 °C - Maximum junction temperature rating; enables deployment in engine bay, transmission control, and under-hood modules. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TCT, and ESD testing; required for functional safety-critical applications. |
| RθJA | 77.5 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or lower-potential rail; forms low-impedance path to shunt surge energy. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 24 V supply or CAN_H); clamps voltage when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term stability under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without popcorn or delamination risk; eliminates pre-bake requirement. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions, improving clamping precision for fast transients like ESD or load dump. |
| Uni-directional polarity | Provides asymmetric protection ideal for DC power rails where reverse polarity is not expected or blocked elsewhere. |
| 185 °C junction capability | Enables placement near heat sources (e.g., power MOSFETs, inductors) without derating, reducing board area and BOM count. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) and body control modules (BCMs) against ISO 7637-2 load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp transients within safe voltage window. Use Value: Limits peak voltage to ≤48.4 V during 62 A surges, preventing damage to downstream PMICs, microcontrollers, and gate drivers. |
Use Scenario: Safeguarding analog and digital signal lines (e.g., LIN, PWM, thermistor inputs) in factory automation sensors exposed to relay coil kickback. IC Role / Device Role / Timing Role: Fast-response clamping element connected in parallel with sensitive input pins to divert surge energy before IC latch-up. Use Value: Sub-nanosecond response time and 48.4 V clamping ensure signal integrity retention and eliminate false triggering in feedback loops. |
| Telecom DC Power Input Protection | Motor Drive Control Board Protection |
Use Scenario: Securing 48 V DC input stages of base station power supplies and remote radio units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end TVS in multi-stage protection architecture, absorbing bulk surge energy before secondary MOV or GDT stages. Use Value: 3000 W peak power rating handles high-energy transients while maintaining low leakage (<1 μA at 30 V) for standby efficiency. |
Use Scenario: Shielding gate driver ICs and current sense amplifiers on BLDC motor control boards from commutation noise and back-EMF spikes. IC Role / Device Role / Timing Role: Localized clamping device mounted adjacent to power stage to minimize loop inductance and improve transient suppression efficacy. Use Value: DO-214AB footprint allows compact placement near MOSFETs; 185 °C rating permits operation in proximity to heated heatsinks. |
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 peak pulse power (400 W), higher clamping voltage (48.4 V vs. 49.9 V), same DO-214AC (SMA) package but smaller thermal mass. | Not AEC-Q101 qualified; suitable only for commercial/industrial use, not automotive. | Select SMAJ30A only for cost-sensitive non-automotive designs where 400 W surge capacity suffices and AEC qualification is unnecessary. |
| SMCJ30A | Same DO-214AB (SMC) package, identical 30 V VWM, but lower peak pulse power (1500 W) and higher clamping voltage (49.9 V). | Lacks AEC-Q101 qualification; used in industrial controls but not approved for automotive safety-critical nodes. | Choose SMCJ30A when full 3000 W capability is not required and AEC-Q101 compliance is not mandated by system-level functional safety requirements. |
Compared with SMAJ30A and SMCJ30A, the 3KASMC30AHM3_A/I delivers 100 % higher peak pulse power, tighter clamping consistency, and formal AEC-Q101 qualification-making it the sole option for ASIL-B/C-compliant automotive power rail protection where thermal robustness and surge margin are critical.
Availability
3KASMC30AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drive systems, and telecom power supply designs requiring stable component supply, high-temperature reliability, and AEC-Q101 compliance.
Supply support for 3KASMC30AHM3_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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC series is part of Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for demanding automotive environments requiring extended temperature operation and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the 3KASMC30AHM3_A/I under surge conditions?
The 3KASMC30AHM3_A/I has a maximum clamping voltage (VC) of 48.4 V at 62 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components experience no more than 48.4 V during standardized surge events, making it suitable for protecting 3.3 V to 24 V logic and power circuits.
Is the 3KASMC30AHM3_A/I qualified for automotive applications?
Yes, the 3KASMC30AHM3_A/I is fully AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM/MM). It is approved for use in automotive powertrain, chassis, and body electronics where reliability under harsh thermal and electrical conditions is mandatory.
What package type does the 3KASMC30AHM3_A/I use, and what are its key mechanical features?
The 3KASMC30AHM3_A/I uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It features UL 94 V-0 compliant molding compound, JESD 201 Class 2 whisker resistance, and a cathode identification band. The package supports MSL Level 1 reflow up to 260 °C.
How does the 3KASMC30AHM3_A/I compare to standard SMAJ or SMCJ series TVS diodes?
The 3KASMC30AHM3_A/I offers higher peak pulse power (3000 W vs. 400 W for SMAJ30A and 1500 W for SMCJ30A), tighter clamping voltage tolerance, and formal AEC-Q101 qualification-unlike most SMAJ/SMCJ variants. Its 185 °C junction rating also exceeds typical 150–175 °C limits, enabling under-hood deployment where other TVS diodes would require derating.
What is the reverse leakage current specification for the 3KASMC30AHM3_A/I at rated stand-off voltage?
At VWM = 30 V and TA = 25 °C, the 3KASMC30AHM3_A/I exhibits a maximum reverse leakage current (IR) of 1.0 μA. At elevated temperature (TJ = 150 °C), leakage remains ≤15 μA, ensuring minimal standby power loss and stable biasing in precision analog circuits.
3KASMC30AHM3_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)
3KASMC30AHM3_A/I FAQ
1.How can I place an order for 3KASMC30AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHM3_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 3KASMC30AHM3_A/I reliable?
The price and inventory of 3KASMC30AHM3_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 3KASMC30AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHM3_A/I?
3KASMC30AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHM3_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 3KASMC30AHM3_A/I?
For technical support, including 3KASMC30AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC30AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHM3_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 3KASMC30AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHM3_A/I?
All 3KASMC30AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHM3_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 3KASMC30AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC30AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHM3_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 …
