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Vishay General Semiconductor - Diodes Division 3KASMC24AHM3/57T
- Part No.:
- 3KASMC24AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24AHM3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC24AHM3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) designed for high-reliability overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 µs), clamps at 38.9 V under 77.1 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and sensor signal lines in engine control units and motor drives.
For engineers reviewing the 3KASMC24AHM3/57T datasheet, 3KASMC24AHM3/57T pinout, 3KASMC24AHM3/57T application, or 3KASMC24AHM3/57T equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, AEC-Q101 qualification, 24 V stand-off voltage, low 1.0 µA reverse leakage at VWM, and 18.3 °C/W junction-to-lead thermal resistance for thermal-aware PCB layout.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast transient response. Its unidirectional architecture provides forward conduction capability while clamping reverse transients above 26.7 V breakdown voltage, with 38.9 V clamping voltage measured at 77.1 A IPPM under standardized 10/1000 µs waveform conditions.
The device meets MSL Level 1 per J-STD-020 (260 °C peak reflow), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing - confirming suitability for automated SMT assembly and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on across production lots. |
| PPPM | 3000 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy ESD and load-dump suppression. |
| IPPM | 77.1 A - Peak pulse current corresponding to 3000 W at 38.9 V clamping; used for surge current path sizing and trace width calculation. |
| VC | 38.9 V - Maximum clamping voltage at IPPM; determines protected circuit's maximum transient exposure level. |
| TJ max. | 185 °C - Maximum junction temperature rating; enables operation in under-hood automotive and industrial power converter environments. |
| RθJL | 18.3 °C/W - Junction-to-lead thermal resistance; critical for estimating temperature rise under DC bias or repetitive surges. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by molded band. Dimensions: 6.22 mm × 5.59 mm × 2.41 mm (L × W × H); RoHS-compliant, AEC-Q101 qualified, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional configuration; carries forward surge current during clamping. |
| Cathode | Transient clamping terminal | Connected to protected line (e.g., 24 V supply); initiates avalanche breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - required for ECUs and ADAS modules. |
| 185 °C junction rating | Enables uninterrupted operation in high-ambient environments such as engine compartments and industrial motor controllers without derating. |
| 3000 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events without degradation in 24 V systems. |
| Low 1.0 µA reverse leakage at VWM | Minimizes standby power loss and avoids false triggering in always-on circuits like CAN bus nodes and sensor interfaces. |
| DO-214AB (SMC) package | Standardized footprint compatible with high-volume SMT assembly; supports >200 A IFSM surge handling via optimized leadframe thermal path. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 24 V PLC I/O Module |
|---|---|
Use Scenario: Protection of 24 V supply rail against alternator load dump transients and inductive switching spikes from solenoids and fuel injectors. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and main regulator input to clamp transients before they reach downstream PMICs and microcontrollers. Use Value: Clamps to 38.9 V at 77.1 A, limiting stress on 40 V-rated input capacitors and ensuring regulator survival during 120 V/50 ms load dump events. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Front-end transient suppressor on each 24 V digital input channel, mounted directly at connector entry point. Use Value: Fast response time and low clamping voltage preserve signal integrity for 24 V TTL-compatible inputs while meeting IEC 61000-4-4 EFT immunity requirements. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Input Stage |
Use Scenario: Overvoltage protection for LIN bus transceivers and LED driver ICs powered from vehicle battery with variable voltage (9–16 V). IC Role / Device Role / Timing Role: Local TVS on 12/24 V supply pins of LIN transceivers and LED drivers to prevent latch-up during jump-start or battery reversal events. Use Value: 24 V VWM allows full margin above nominal 12 V systems while supporting dual-voltage BCM designs; 185 °C rating accommodates under-dash mounting. |
Use Scenario: Primary surge suppression on 24 V DC input of telecom remote radio head (RRH) power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense in multi-stage protection scheme, absorbing bulk energy before downstream MOVs and GDTs. Use Value: 3000 W PPPM and 77.1 A IPPM enable single-device handling of 10/1000 µs surges up to 3 kV (line-to-ground), reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5AT | Lower PPPM (400 W), higher VC (38.9 V same but at only 10.3 A), DO-214AC (SMA) package with smaller thermal mass. | Not AEC-Q101 qualified; limited to consumer/industrial use where automotive reliability is not mandated. | Select when cost sensitivity outweighs surge energy requirements and AEC-Q101 compliance is unnecessary. |
| SMCJ24A | Same DO-214AB package and 3000 W rating, but VBR min/max = 26.7–29.5 V identical; differs in MSL rating (MSL 2a vs. HM3's MSL 1) and whisker test compliance (Class 1 vs. Class 2). | Approved for less demanding reflow profiles and shorter shelf-life storage; may require tighter process controls in high-volume automotive SMT lines. | Select when MSL 1 and JESD 201 Class 2 whisker performance are not required, and standard industrial qualification suffices. |
Compared with SMAJ24A-E3/5AT and SMCJ24A, the 3KASMC24AHM3/57T offers superior thermal robustness (RθJL = 18.3 °C/W), guaranteed AEC-Q101 qualification, and MSL Level 1 compatibility - making it the preferred choice for mission-critical automotive and high-reliability industrial deployments where long-term field stability is non-negotiable.
Availability
3KASMC24AHM3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial 24 V PLC I/O modules, and telecom power supply input stages requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for 3KASMC24AHM3/57T 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 TVS devices for automotive, industrial, and computing markets.
The 3KASMC series is part of Vishay's PAR® TVS platform, engineered specifically for high-temperature, high-surge environments - targeting under-hood automotive electronics and ruggedized industrial power systems where conventional TVS devices fail.
FAQ
What is the maximum clamping voltage of the 3KASMC24AHM3/57T under peak surge conditions?
The 3KASMC24AHM3/57T has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 77.1 A using the standardized 10/1000 µs waveform. This value is measured and guaranteed per Vishay Document Number 89962, ensuring predictable overvoltage limiting for protected downstream components in 24 V systems.
Is the 3KASMC24AHM3/57T qualified for automotive applications?
Yes, the 3KASMC24AHM3/57T is AEC-Q101 qualified and explicitly listed as such in Vishay's official documentation (Document Number 89962). It meets all stress tests required for automotive-grade discrete semiconductors, including temperature cycling, humidity, and mechanical shock - making it suitable for engine control units, body control modules, and ADAS power supplies.
What package type does the 3KASMC24AHM3/57T use, and what are its key assembly advantages?
The 3KASMC24AHM3/57T uses the DO-214AB (SMC) surface-mount package. Its key assembly advantages include MSL Level 1 moisture sensitivity rating (compatible with standard 260 °C peak reflow), matte tin-plated leads compliant with J-STD-002 solderability standards, and JESD 201 Class 2 whisker resistance - enabling reliable high-volume SMT manufacturing without post-reflow inspection concerns.
How does the 3KASMC24AHM3/57T compare to standard SMAJ or SMCJ series TVS diodes?
The 3KASMC24AHM3/57T shares the same 24 V stand-off and 3000 W surge rating as SMCJ24A but adds AEC-Q101 qualification, MSL Level 1, and JESD 201 Class 2 whisker compliance - features absent in standard SMCJ or SMAJ variants. Unlike SMAJ24A-E3/5AT, it delivers full 3000 W capability rather than 400 W, making it suitable for automotive load-dump and industrial surge events.
What is the thermal resistance from junction to leads (RθJL) for the 3KASMC24AHM3/57T, and why does it matter?
The 3KASMC24AHM3/57T has a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, as specified in Vishay Document Number 89962. This parameter matters because it directly impacts temperature rise under sustained DC leakage or repetitive surge conditions - enabling accurate thermal modeling for PCB copper pour design and ensuring safe operation at 185 °C maximum junction temperature.
3KASMC24AHM3/57T 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 77.1A
- 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)
3KASMC24AHM3/57T FAQ
1.How can I place an order for 3KASMC24AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24AHM3/57T 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 3KASMC24AHM3/57T reliable?
The price and inventory of 3KASMC24AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC24AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC24AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24AHM3/57T?
3KASMC24AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24AHM3/57T 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 3KASMC24AHM3/57T?
For technical support, including 3KASMC24AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC24AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC24AHM3/57T 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 3KASMC24AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC24AHM3/57T?
All 3KASMC24AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24AHM3/57T, 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 3KASMC24AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC24AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC24AHM3/57T Tags
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