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Vishay General Semiconductor - Diodes Division 3KASMC24AHE3/57T
- Part No.:
- 3KASMC24AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC24AHE3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
3KASMC24AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-reliability clamping of voltage transients on power and signal lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 3000 W peak pulse power (10/1000 μs), 38.9 V maximum clamping voltage at 77.1 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the 3KASMC24AHE3/57T datasheet, 3KASMC24AHE3/57T pinout, 3KASMC24AHE3/57T application, or 3KASMC24AHE3/57T equivalent, key selection criteria include clamping performance under 10/1000 μs surge, TJ = 185 °C junction rating, uni-directional polarity, MSL Level 1 reflow compatibility, and DO-214AB mechanical footprint compliance.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping across -65 °C to +185 °C operating range. Its low incremental surge resistance and fast response time enable effective protection against inductive switching spikes and lightning-induced transients on DC power rails and sensor interfaces.
The device operates exclusively in uni-directional mode with cathode band marking, requires no external biasing, and is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine). Thermal resistance is 77.5 °C/W (junction-to-ambient) and 18.3 °C/W (junction-to-leads) under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on threshold. |
| VC @ IPPM | 38.9 V - Clamped voltage at 77.1 A peak pulse current (10/1000 μs); determines protected circuit's maximum transient exposure. |
| PPPM | 3000 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +185 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronic components including temperature cycling and HTRB. |
| MSL Level | Level 1 (260 °C peak) - Compatible with standard lead-free reflow profiles without moisture sensitivity concerns. |
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 lower-potential side of protected line (e.g., GND or return path). |
| Cathode | Current exit terminal during forward conduction; clamping node | Connected to higher-potential side (e.g., VCC or signal line); marked by band; conducts during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and leakage over lifetime and temperature. |
| High-temperature operation | TJ = 185 °C rating enables deployment in engine control units, powertrain modules, and industrial motor drives. |
| Clamping efficiency | Low VC/VBR ratio (~1.46) minimizes voltage overshoot during surge events, protecting downstream MOSFETs and ICs. |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) supports repeated load-dump and inductive kick energy absorption. |
| Automotive qualification | AEC-Q101 compliance confirms reliability for safety-critical automotive subsystems without additional qualification effort. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Uni-directional TVS clamping device placed between battery rail and DC-DC input. Use Value: Limits transient voltage to ≤38.9 V during 3000 W surges, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response clamping diode on signal line between sensor and ADC input. Use Value: Sub-nanosecond response and 1.0 μA IR at 24 V ensure minimal signal distortion and long-term stability. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding 24–48 V PoE-powered equipment inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage upstream of isolation and regulation. Use Value: 3000 W PPPM and DO-214AB thermal mass sustain multiple IEC 61000-4-5 surges without degradation. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Flyback suppression diode across motor terminals or H-bridge outputs. Use Value: 200 A IFSM rating handles repetitive 8.3 ms surges; 185 °C TJ allows placement near hot motor housings. |
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), smaller SMA package (DO-214AC), VBR 26.7–29.7 V, same VWM | Not suitable for 3000 W surge environments; limited thermal mass for repetitive events | Select when board space is constrained and surge energy is ≤400 W (e.g., low-power IoT nodes). |
| SMCJ24A | Same DO-214AB package, identical VWM/VBR/VC specs, but rated for 1500 W PPPM (not 3000 W) | Lacks margin for high-energy automotive load dump per ISO 7637-2 Pulse 5a | Choose only if system-level testing confirms 1500 W clamping suffices and cost is prioritized over headroom. |
Compared with SMAJ24A and SMCJ24A, the 3KASMC24AHE3/57T delivers 2× and 2× higher peak pulse power respectively, enabling single-device compliance with stringent automotive and industrial surge standards without parallel stacking or derating.
Availability
3KASMC24AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply, AEC-Q101 assurance, and high-energy transient immunity.
Supply support for 3KASMC24AHE3/57T 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive-grade qualification.
The 3KASMC series was developed specifically for high-temperature, high-energy transient suppression in automotive power systems and industrial automation, addressing demand for AEC-Q101-compliant, 185 °C-rated TVS diodes in standard SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC24AHE3/57T under a 10/1000 μs surge?
The 3KASMC24AHE3/57T exhibits a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 77.1 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 24 V-rated components. The 3KASMC24AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC24AHE3/57T suitable for automotive applications?
Yes, the 3KASMC24AHE3/57T is AEC-Q101 qualified and rated for TJ = 185 °C, making it suitable for under-hood and powertrain applications including body control modules, lighting drivers, and ADAS sensor power supplies. Its DO-214AB package meets MSL Level 1 and its 3000 W PPPM supports ISO 7637-2 Pulse 5a load dump immunity. The 3KASMC24AHE3/57T is explicitly listed in Vishay's automotive-grade product portfolio.
What does the "HE3/57T" suffix indicate in 3KASMC24AHE3/57T?
The "HE3/57T" suffix denotes Vishay's packaging and reel configuration: "HE3" identifies the base P/NHM3 variant (RoHS-compliant, AEC-Q101 qualified, JESD 201 Class 2 whisker resistant), while "57T" specifies 7-inch plastic tape-and-reel delivery with 850 units per reel. This matches the ordering information in Document 89962 and confirms the 3KASMC24AHE3/57T is supplied in standard SMC-compatible format.
How does the thermal performance of the 3KASMC24AHE3/57T compare to smaller packages?
The 3KASMC24AHE3/57T in DO-214AB (SMC) offers RθJA = 77.5 °C/W and RθJL = 18.3 °C/W - significantly better than SMA (DO-214AC) or SOD-123 packages due to larger copper area and thermal mass. This enables sustained power dissipation up to 6.0 W on infinite heatsink and supports repeated high-energy surges without thermal runaway. The 3KASMC24AHE3/57T leverages this advantage in motor drive and power supply protection where thermal cycling is frequent.
Can the 3KASMC24AHE3/57T be used in bi-directional configurations?
No, the 3KASMC24AHE3/57T is specified for uni-directional polarity only, as confirmed in the Vishay datasheet revision 05-Mar-13. It features a cathode band marking and is not characterized for reverse-biased clamping. For bi-directional protection, a pair of uni-directional devices or a dedicated bi-directional TVS (e.g., 3KASMC24CA) must be used. The 3KASMC24AHE3/57T's design and qualification apply solely to uni-directional operation.
3KASMC24AHE3/57T 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)
3KASMC24AHE3/57T FAQ
1.How can I place an order for 3KASMC24AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC24AHE3/57T 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 3KASMC24AHE3/57T reliable?
The price and inventory of 3KASMC24AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC24AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC24AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC24AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC24AHE3/57T?
3KASMC24AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC24AHE3/57T 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 3KASMC24AHE3/57T?
For technical support, including 3KASMC24AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC24AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC24AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC24AHE3/57T 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 3KASMC24AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC24AHE3/57T?
All 3KASMC24AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC24AHE3/57T, 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 3KASMC24AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC24AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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