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Vishay General Semiconductor - Diodes Division 3KASMC15HE3/57T
- Part No.:
- 3KASMC15HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15HE3/57T.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
3KASMC15HE3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 15 V stand-off voltage, 16.7–18.5 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 123 A peak surge current, and 24.4 V clamping voltage at IPPM - deployed for automotive power rail and sensor line protection against load dump and inductive switching transients.
For engineers reviewing the 3KASMC15HE3/57T datasheet, 3KASMC15HE3/57T pinout, 3KASMC15HE3/57T application, or 3KASMC15HE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C operation, MSL Level 1 moisture sensitivity, and DO-214AB thermal performance with RθJA = 77.5 °C/W.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time under high-energy transients. Its junction design supports stable clamping up to 185 °C junction temperature and meets JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements.
The device operates exclusively in unidirectional mode with cathode band marking, delivers 24.4 V clamping at 123 A IPPM, and maintains ≤1.0 μA reverse leakage at 15 V VWM and ≤10 μA at TJ = 150 °C - enabling robust protection in automotive ECUs and industrial motor drives where reliability under thermal stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; sets threshold for protection activation on 12 V automotive systems. |
| VBR (min/max) | 16.7 V / 18.5 V at IT = 1 mA - verified breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 24.4 V at 123 A - clamping voltage defines worst-case overvoltage seen by downstream ICs during 3000 W transient events. |
| PPPM | 3000 W (10/1000 μs) - peak pulse power rating determines survivability against ISO 7637-2 Pulse 5a load dump surges. |
| TJ max. | 185 °C - enables operation in under-hood environments without derating in engine control modules and battery management units. |
| IR @ VWM | ≤1.0 μA at 25 °C; ≤10 μA at 150 °C - ultra-low leakage preserves signal integrity and minimizes standby power loss in always-on circuits. |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead spacing for automated assembly. |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by molded band. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 2 for whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path. | Provides reference node for clamping action; must be routed with low-inductance path to minimize voltage overshoot during surge. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 12 V rail or sensor input). | Marked by color band; defines polarity-sensitive placement - reverse orientation disables protection function entirely. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for ECU, ADAS, and body control module deployment. |
| Junction passivation | Optimized anisotropic rectifier process reduces parameter drift over lifetime and improves stability under repeated surge stress. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/85 % RH - eliminates bake-out requirement prior to reflow, reducing manufacturing cost and risk. |
| Low RSURGE | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 16750-2 pulses), improving protection margin for 3.3 V/5 V logic interfaces. |
| TJ = 185 °C capability | Enables direct mounting near heat sources (e.g., power MOSFETs or DC-DC converters) without thermal derating penalties in compact layouts. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed ECUs in engine compartments. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and upstream fuse or DC-DC input. Use Value: Limits voltage to ≤24.4 V during 3000 W surges, preventing damage to 36 V-rated regulators and microcontrollers. |
Use Scenario: Protecting analog sensor inputs (e.g., pressure, temperature) from ESD and inductive kickback in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage TVS placed at connector interface, shunting transients before signal conditioning amplifiers. Use Value: Maintains ≤1.0 μA leakage at 15 V, avoiding DC offset errors in precision 24-bit ADC front-ends. |
| Automotive Lighting Driver Protection | Telecom Power Supply Input Protection |
|
Use Scenario: Safeguarding LED driver ICs from back-EMF generated by relay-controlled headlamp loads in vehicle lighting modules. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly at driver IC supply pins to clamp sub-100 ns spikes. Use Value: Achieves clamping within <1 ps response time, limiting overvoltage to 24.4 V before driver internal FETs fail. |
Use Scenario: Guarding AC-DC adapter outputs against lightning-induced surges entering telecom base station power supplies. IC Role / Device Role / Timing Role: Primary-stage TVS on +12 V/24 V output rail, coordinated with MOV and fuse for staged protection. Use Value: Delivers 3000 W pulse handling with 77.5 °C/W RθJA, enabling natural convection cooling without heatsink in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR = 16.7–18.5 V; no AEC-Q101 qualification. | Limited to consumer/industrial use; not suitable for automotive under-hood locations due to 150 °C TJ max. | Select when cost sensitivity outweighs automotive qualification and higher surge immunity is unnecessary. |
| 1.5KE15A | Through-hole DO-201AE package; same 15 V VWM; PPPM = 1500 W; VBR = 16.7–18.5 V; AEC-Q101 not claimed. | Requires manual or wave soldering; incompatible with SMT-only lines; lower power handling limits use in high-energy systems. | Choose only for legacy through-hole designs where board real estate and assembly process preclude SMT adoption. |
Compared with SMAJ15A and 1.5KE15A, the 3KASMC15HE3/57T provides 7.5× higher peak pulse power, AEC-Q101 validation, and DO-214AB thermal performance - making it the sole option for new automotive SMT designs requiring 3000 W surge immunity and 185 °C operation.
Availability
3KASMC15HE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply inputs requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC15HE3/57T 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 efficiency, and automotive-grade qualification.
The 3KASMC series was engineered specifically for high-reliability automotive and industrial transient suppression, targeting under-hood and factory-floor environments where extended temperature operation and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC15HE3/57T at its rated peak pulse current?
The 3KASMC15HE3/57T has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 123 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 3000 W transient event and is confirmed in the Vishay datasheet Document Number 89962, Table on page 2.
Is the 3KASMC15HE3/57T qualified for automotive applications?
Yes, the 3KASMC15HE3/57T is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet revision 05-Mar-13 (Document Number 89962). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, confirming suitability for automotive electronic control units and ADAS subsystems.
What package type does the 3KASMC15HE3/57T use, and what are its key mechanical features?
The 3KASMC15HE3/57T uses the DO-214AB (SMC) surface-mount package, with dimensions of 7.75 mm × 6.22 mm and 2.06 mm lead spacing. Its molding compound meets UL 94 V-0 flammability rating, leads are matte tin-plated per J-STD-002, and it achieves MSL Level 1 per J-STD-020 - supporting lead-free reflow without preconditioning.
Does the 3KASMC15HE3/57T support bidirectional transient suppression?
No, the 3KASMC15HE3/57T is unidirectional only, as confirmed in the "FEATURES" section of the Vishay datasheet. It protects against positive transients on the cathode side relative to anode and must be oriented with the cathode band toward the protected line - bidirectional operation requires separate devices like the SMBJ15CA.
What is the maximum junction temperature rating for the 3KASMC15HE3/57T?
The 3KASMC15HE3/57T is rated for a maximum junction temperature (TJ) of +185 °C, enabling reliable operation in high-temperature environments such as engine control modules and power inverters. This rating is specified in the "PRIMARY CHARACTERISTICS" table and validated under AEC-Q101 thermal stress testing.
3KASMC15HE3/57T 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
3KASMC15HE3/57T FAQ
1.How can I place an order for 3KASMC15HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15HE3/57T 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 3KASMC15HE3/57T reliable?
The price and inventory of 3KASMC15HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC15HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15HE3/57T?
3KASMC15HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15HE3/57T 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 3KASMC15HE3/57T?
For technical support, including 3KASMC15HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15HE3/57T requirements.
6.How does Aetrix verify that 3KASMC15HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC15HE3/57T 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 3KASMC15HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC15HE3/57T?
All 3KASMC15HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15HE3/57T, 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 3KASMC15HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC15HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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