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Vishay General Semiconductor - Diodes Division 3KASMC24HE3/57T
- Part No.:
- 3KASMC24HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24HE3/57T.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,888
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Product details
Overview
3KASMC24HE3/57T 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 38.9 V under 77.1 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 3KASMC24HE3/57T datasheet, 3KASMC24HE3/57T pinout, 3KASMC24HE3/57T application, or 3KASMC24HE3/57T equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, AEC-Q101 qualification, 24 V stand-off voltage, low 1.0 μA leakage at VWM, and thermal resistance of 77.5 °C/W (junction-to-ambient).
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response (<1 ns), with clamping performance validated per ANSI/IEEE C62.35 standards. Its unidirectional polarity and 26.7–29.5 V breakdown range (VBR) ensure precise overvoltage thresholding for 24 V nominal systems.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports MSL Level 1 reflow (260 °C peak), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 - confirming suitability for automated SMT assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; matches 24 V system rail tolerance. |
| VBR (min/max) | 26.7 V / 29.5 V at 1.0 mA - Confirmed breakdown threshold ensures reliable turn-on margin above VWM. |
| PPPM | 3000 W (10/1000 μs) - Enables suppression of high-energy transients like ISO 7637-2 Pulse 5a without failure. |
| VC @ IPPM | 38.9 V at 77.1 A - Clamping voltage stays within safe SOA limits for downstream 40 V-rated MOSFETs and controllers. |
| IR @ VWM | 1.0 μA - Negligible leakage preserves battery drain budget in always-on automotive modules. |
| TJ max. | 185 °C - Supports operation in under-hood environments without derating in most PCB layouts. |
| RθJA | 77.5 °C/W - Predictable thermal rise on standard 1 oz copper pads enables accurate junction temp estimation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Dimensions: 6.22 mm × 5.59 mm × 2.90 mm (L × W × H), RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Accepts surge current during clamping; must be routed with low-inductance trace to minimize VL overshoot. |
| Cathode | High-side connection to protected line (e.g., 24 V rail) | Connected via shortest possible path to source of transient; color band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD - eliminates need for additional qualification effort. |
| 185 °C junction rating | Enables direct placement near heat sources (e.g., power inductors, MOSFETs) without thermal derating in engine bay applications. |
| 3000 W peak pulse power | Withstands multiple ISO 7637-2 Pulse 5a events (100 V, 500 ms) without degradation when mounted per recommended pad layout. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - reduces manufacturing overhead. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., relay coil flyback), improving protection margin. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protection of 24 V supply rail against load dump and inductive kickback from fuel injector solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transients to ≤38.9 V, keeping downstream 40 V-input buck controller within absolute maximum ratings. |
Use Scenario: Guarding gate driver ICs and IGBTs from voltage spikes during PWM switching in 24 V servo amplifiers. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus to suppress commutation spikes before they reach power stage. Use Value: Sub-1 ns response time prevents latch-up in sensitive CMOS gate drivers during fast dV/dt events. |
| Telecom Remote Radio Head (RRH) | Commercial HVAC Control Board |
Use Scenario: Safeguarding RS-485 transceivers and microcontroller I/O lines powered from 24 V auxiliary supply. IC Role / Device Role / Timing Role: Local TVS at connector entry point, shunting surges induced by nearby lightning-induced coupling. Use Value: 1.0 μA leakage avoids signal integrity issues on bias networks; DO-214AB footprint fits tight board spacing. |
Use Scenario: Protecting thermostat interface circuits and relay coils from back-EMF in 24 V HVAC control panels. IC Role / Device Role / Timing Role: TVS installed across relay coil terminals to absorb energy and extend contact life. Use Value: 200 A IFSM rating handles repeated 8.3 ms surges without parameter shift - critical for daily cycling reliability. |
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 | Lower PPPM (400 W), higher VC (38.9 V same, but lower IPPM = 10.3 A), DO-214AC (SMA) package | Not AEC-Q101 qualified; limited to consumer/industrial use below 150 °C | Select only if cost-sensitive, non-automotive, and surge energy is <10% of 3KASMC24HE3/57T capability. |
| SMCJ24A | Same DO-214AB package and 3000 W rating, but VBR min/max = 26.7–29.5 V identical; not AEC-Q101 qualified per datasheet | Lacks automotive qualification documentation; may require customer requalification for automotive programs | Use where AEC-Q101 is not mandated but mechanical and electrical specs match exactly. |
Compared with SMAJ24A and SMCJ24A, the 3KASMC24HE3/57T provides guaranteed AEC-Q101 compliance, 185 °C operation, and MSL Level 1 handling - making it the only choice for production automotive ECUs without added validation burden.
Availability
3KASMC24HE3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom remote radio heads, and commercial HVAC control boards requiring stable component supply and long-term lifecycle support.
Supply support for 3KASMC24HE3/57T 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, rectifiers, and protection devices for demanding environments.
The 3KASMC series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive power systems and high-temperature industrial controls - emphasizing thermal robustness, surge endurance, and process consistency.
FAQ
What is the clamping voltage of the 3KASMC24HE3/57T under maximum surge conditions?
The 3KASMC24HE3/57T clamps to 38.9 V when subjected to its rated peak pulse current of 77.1 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 05-Mar-13, ensuring predictable overvoltage limiting for 40 V-rated downstream components. The 3KASMC24HE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC24HE3/57T qualified for automotive applications?
Yes, the 3KASMC24HE3/57T is explicitly AEC-Q101 qualified, as stated in the Vishay datasheet (Document Number: 89962). It has passed stress tests including high-temperature operating life, temperature cycling, and ESD - making it approved for use in engine control units, body control modules, and other automotive electronic systems requiring zero-defect reliability.
What package does the 3KASMC24HE3/57T use, and what are its key mounting requirements?
The 3KASMC24HE3/57T uses the DO-214AB (SMC) surface-mount package, with dimensions of 6.22 mm × 5.59 mm × 2.90 mm. Vishay specifies a minimum pad layout for optimal thermal and surge performance, and the device meets MSL Level 1 - allowing standard reflow profiles with 260 °C peak temperature. The cathode is marked by a color band on the 3KASMC24HE3/57T body.
How does the 3KASMC24HE3/57T compare to standard SMAJ-series TVS diodes?
The 3KASMC24HE3/57T delivers 3000 W peak pulse power versus 400 W for SMAJ24A, uses the larger DO-214AB (not DO-214AC) package for better thermal dissipation, and is AEC-Q101 qualified - whereas SMAJ24A is not. The 3KASMC24HE3/57T also supports 185 °C operation and MSL Level 1, making it unsuitable for direct substitution in legacy SMAJ footprints or non-automotive designs.
What is the maximum reverse leakage current of the 3KASMC24HE3/57T at its stand-off voltage?
The 3KASMC24HE3/57T exhibits a maximum reverse leakage current of 1.0 μA at its 24 V stand-off voltage (VWM) and 25 °C ambient temperature, as specified in the Vishay datasheet. This ultra-low leakage remains stable up to 150 °C (5.0 μA), supporting energy-efficient always-on automotive modules where standby current budgets are tightly constrained.
3KASMC24HE3/57T 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:
- 43V
- Current - Peak Pulse (10/1000µs):
- 69.8A
- 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)
3KASMC24HE3/57T FAQ
1.How can I place an order for 3KASMC24HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24HE3/57T 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 3KASMC24HE3/57T reliable?
The price and inventory of 3KASMC24HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC24HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC24HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24HE3/57T?
3KASMC24HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24HE3/57T 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 3KASMC24HE3/57T?
For technical support, including 3KASMC24HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24HE3/57T requirements.
6.How does Aetrix verify that 3KASMC24HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC24HE3/57T 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 3KASMC24HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC24HE3/57T?
All 3KASMC24HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24HE3/57T, 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 3KASMC24HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC24HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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