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Vishay General Semiconductor - Diodes Division 3KASMC15AHM3_A/H
- Part No.:
- 3KASMC15AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHM3_A/H.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,050
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Product details
Overview
3KASMC15AHM3_A/H 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 24.4 V under 123 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC15AHM3_A/H datasheet, 3KASMC15AHM3_A/H pinout, 3KASMC15AHM3_A/H application, or 3KASMC15AHM3_A/H equivalent, key selection criteria include its DO-214AB (SMC) package, 15 V stand-off voltage, AEC-Q101 qualification, 1.0 mA breakdown test current, and 1.0 μA max reverse leakage at VWM.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across -65 °C to +185 °C operating range. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and lightning-induced transients on DC power lines and signal paths.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), with thermal resistance RθJA = 77.5 °C/W and RθJL = 18.3 °C/W - confirming suitability for PCB-mounted applications without forced cooling under typical automotive derating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V automotive systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - verified breakdown threshold ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 μs) - enables protection against severe load-dump and ISO 7637-2 Pulse 5a transients. |
| VC @ IPPM | 24.4 V at 123 A - low clamping voltage limits stress on downstream 24 V-rated components. |
| IR @ VWM | ≤1.0 μA at 25 °C - negligible leakage preserves battery life in always-on automotive modules. |
| TJ max | +185 °C - supports under-hood placement without thermal derating penalties in engine control units. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to the circuit node requiring overvoltage clamping; polarity must match DC rail orientation. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and leakage performance over lifetime and temperature cycling. |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in 12 V/24 V vehicle electrical systems. |
| Uni-directional polarity only | Simplifies layout and eliminates risk of reverse-bias failure in DC-coupled protection schemes. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination. |
| HM3 suffix compliance | Meets JESD201 Class 2 whisker resistance - critical for long-term reliability in vibration-prone environments. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting engine control unit (ECU) 12 V supply against load dump and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps transients to ≤24.4 V within nanoseconds, preventing damage to 36 V-rated LDOs and microcontrollers. |
Use Scenario: Safeguarding IGBT gate drivers and bus voltage monitors in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC link to absorb commutation spikes. Use Value: 3000 W rating handles repetitive 10/1000 μs surges from inductive motor back-EMF without degradation. |
| Telecom Power Interface | Consumer Appliance Main Board |
Use Scenario: Input-stage protection for PoE-powered network switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input before DC/DC conversion. Use Value: 185 °C TJ max allows operation near heat-generating Ethernet PHYs without thermal shutdown. |
Use Scenario: Overvoltage safeguard for smart appliance main board DC rails during relay coil de-energization. IC Role / Device Role / Timing Role: Clamp device across solenoid driver outputs to suppress flyback spikes. Use Value: Low 1.0 μA leakage avoids standby current accumulation in energy-efficient designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T (Vishay) | Lower PPPM (400 W), same DO-214AC (SMA) package, 15 V VWM, not AEC-Q101 qualified. | Suitable for cost-sensitive consumer electronics; insufficient for automotive load-dump immunity. | Select when budget constraints outweigh automotive qualification needs and surge energy is ≤400 W. |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201AE package, 1500 W PPPM, 15 V VWM, no AEC-Q101, higher VC (24.9 V). | Requires PCB through-hole real estate; limited to lower-energy transients and non-automotive use cases. | Choose only if legacy through-hole assembly is mandated and 3000 W capability is not required. |
Compared with SMAJ15A-E3/57T and 1.5KE15A, the 3KASMC15AHM3_A/H provides triple the peak pulse power in a surface-mount AEC-Q101-qualified package - making it the sole option among the three for ISO 16750-2 compliant automotive power line protection.
Availability
3KASMC15AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor controllers, telecom power interfaces, and consumer appliance main boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC15AHM3_A/H 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, efficiency, and application-specific optimization.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the 3KASMC15AHM3_A/H under maximum surge current?
The 3KASMC15AHM3_A/H has a maximum clamping voltage (VC) of 24.4 V at 123 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream 24 V-rated components remain within safe operating limits during transient events. The 3KASMC15AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC15AHM3_A/H qualified for automotive applications?
Yes, the 3KASMC15AHM3_A/H is AEC-Q101 qualified, meeting stress test requirements for high-reliability automotive use including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). Its 185 °C maximum junction temperature and DO-214AB package with MSL Level 1 rating further validate its suitability for under-hood and powertrain applications.
What does the "HM3_A/H" suffix indicate in 3KASMC15AHM3_A/H?
The "HM3" denotes Vishay's RoHS-compliant, AEC-Q101-qualified DO-214AB (SMC) package with matte tin plating and JESD201 Class 2 whisker resistance. The "_A/H" suffix specifies tape-and-reel packaging: "H" indicates 7-inch diameter reel with 850 units per reel, per Vishay's ordering code convention in document 89962.
Can the 3KASMC15AHM3_A/H be used in bidirectional configurations?
No, the 3KASMC15AHM3_A/H is unidirectional only, as explicitly stated in the datasheet. It conducts in reverse breakdown mode to clamp positive transients on a DC rail referenced to ground. For bidirectional protection, two 3KASMC15AHM3_A/H devices must be connected in series opposing configuration - but this is not recommended due to mismatched VBR and increased footprint versus purpose-built bidirectional TVS devices.
What is the thermal resistance of the 3KASMC15AHM3_A/H, and how does it affect PCB layout?
The 3KASMC15AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W and junction-to-leads (RθJL) of 18.3 °C/W. To maintain safe operation under repeated surges, PCB layout must follow Vishay's recommended minimum pad dimensions (0.126" × 0.060") and use copper pour on both sides connected via multiple vias - otherwise, thermal derating will reduce effective surge handling below 3000 W.
3KASMC15AHM3_A/H 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)
3KASMC15AHM3_A/H FAQ
1.How can I place an order for 3KASMC15AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHM3_A/H 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 3KASMC15AHM3_A/H reliable?
The price and inventory of 3KASMC15AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHM3_A/H?
3KASMC15AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHM3_A/H 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 3KASMC15AHM3_A/H?
For technical support, including 3KASMC15AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC15AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHM3_A/H 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 3KASMC15AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHM3_A/H?
All 3KASMC15AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHM3_A/H, 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 3KASMC15AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC15AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC15AHM3_A/H Tags
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