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Vishay General Semiconductor - Diodes Division 5KASMC28AHM3/57
- Part No.:
- 5KASMC28AHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC28AHM3/57.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,405
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Product details
Overview
5KASMC28AHM3/57 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 5000 W peak pulse power (10/1000 µs), 110.1 V clamping voltage at 50 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 5KASMC28AHM3/57 datasheet, 5KASMC28AHM3/57 pinout, 5KASMC28AHM3/57 application, or 5KASMC28AHM3/57 equivalent, key selection criteria include clamping performance under 50 A surge current, thermal resistance (RθJA = 100 °C/W), TJ = 185 °C operation, DO-214AB package compatibility, and uni-directional polarity for DC rail protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching transients and lightning-induced surges. Its junction temperature rating up to +185 °C supports operation in under-hood automotive environments and industrial power supplies with elevated ambient conditions.
The device operates exclusively in unidirectional configuration, with cathode marked by a band, and is optimized for clamping during positive-going overvoltage events on DC lines. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements, ensuring robust solderability and long-term interconnect integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Ensures predictable turn-on threshold across production lot and temperature range. |
| VC @ IPPM | 110.1 V at 50 A (10/1000 µs) - Clamping voltage limits downstream IC stress during worst-case surge events. |
| PPPM | 5000 W - Peak pulse power handling capability enables protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +185 °C - Supports extended lifetime in high-temperature automotive and industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance informs PCB pad layout design for reliable power dissipation without heatsink. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by color band. Compliant with UL 94 V-0 flammability rating and halogen-free (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms clamping loop with cathode during surge event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V supply); conducts surge current to ground when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR tolerance and low leakage (<2 µA at VWM) across temperature and life cycle. |
| 185 °C junction rating | Allows uninterrupted operation in engine control units, motor drives, and industrial PLCs without thermal shutdown. |
| 5000 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for 4 kV/2 Ω coupling network testing. |
| Low clamping ratio (VC/VBR ≈ 3.2) | Minimizes overvoltage overshoot during fast transients, protecting sensitive gate drivers and microcontrollers. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free assembly without moisture-related popcorning or delamination. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs and body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp transients above 28 V. Use Value: Withstands 5000 W surges and operates reliably up to +185 °C, meeting AEC-Q101 for under-hood deployment. |
Use Scenario: Safeguarding gate driver inputs and feedback sensors in variable-frequency AC drives. IC Role / Device Role / Timing Role: Surge shunt on DC bus and control signal lines to prevent false triggering or latch-up. Use Value: 110.1 V clamping at 50 A ensures MOSFET/IGBT gate oxide remains below breakdown during switching noise events. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
|
Use Scenario: Front-end protection of 48 V PoE-powered switches and base station power converters. IC Role / Device Role / Timing Role: Primary-level TVS on input bulk capacitor node to absorb lightning-induced common-mode surges. Use Value: 100 °C/W RθJA allows direct mounting on standard FR-4 pads without thermal vias in space-constrained modules. |
Use Scenario: Overvoltage safeguard for microcontroller I/O and relay coil flyback in smart HVAC and washing machine boards. IC Role / Device Role / Timing Role: Uni-directional clamp on 12 V/24 V control rails to suppress inductive kickback from solenoids and fans. Use Value: Fast response (<1 ns) and low IR (≤2 µA) preserve standby power budget while maintaining surge readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A (ON Semiconductor) | Same DO-214AA package; lower PPPM = 600 W; VC = 45.4 V @ 13.3 A | Rated for lower-energy transients; suitable for consumer-grade I/O protection but not automotive load dump. | Select SMBJ28A only where surge energy is ≤600 W and AEC-Q101 is not required. |
| SMCJ28A (Littelfuse) | DO-214AB package identical to 5KASMC28AHM3/57; PPPM = 1500 W; VC = 47.7 V @ 31.5 A | Lacks AEC-Q101 qualification and 185 °C rating; intended for industrial/commercial use only. | Choose SMCJ28A for cost-sensitive non-automotive designs needing same footprint but lower surge rating. |
Compared with SMBJ28A and SMCJ28A, the 5KASMC28AHM3/57 delivers 3.3× higher peak power (5000 W), AEC-Q101 validation, and extended +185 °C operation-making it the sole option qualified for under-hood automotive surge protection where reliability and thermal headroom are critical.
Availability
5KASMC28AHM3/57 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power supply prototyping requiring stable component supply and long-term lifecycle support.
Supply support for 5KASMC28AHM3/57 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, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade performance.
The 5KASMCxxA series was engineered specifically for high-energy transient suppression in harsh-environment applications, combining AEC-Q101 qualification, 185 °C operation, and DO-214AB rugged packaging for automotive and industrial power systems.
FAQ
What is the clamping voltage of the 5KASMC28AHM3/57 at its rated peak pulse current?
The 5KASMC28AHM3/57 has a maximum clamping voltage (VC) of 110.1 V when subjected to a 50 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The 5KASMC28AHM3/57 maintains this clamping performance across its full operating temperature range.
Is the 5KASMC28AHM3/57 suitable for automotive applications?
Yes, the 5KASMC28AHM3/57 is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications such as engine control units, body electronics, and ADAS power supplies. Its DO-214AB package and halogen-free HM3 construction further align with automotive manufacturing and compliance requirements.
What does the "HM3/57" suffix indicate in 5KASMC28AHM3/57?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, and AEC-Q101-qualified construction with JESD201 Class 2 whisker resistance. The "/57" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel-standard for automated SMT placement in high-volume production of the 5KASMC28AHM3/57.
How does the thermal resistance of the 5KASMC28AHM3/57 affect PCB layout?
The 5KASMC28AHM3/57 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout. To avoid exceeding the +185 °C maximum junction temperature, designers must ensure adequate copper area and thermal relief; adding thermal vias or increasing pad size reduces RθJA and improves sustained power handling of the 5KASMC28AHM3/57.
Can the 5KASMC28AHM3/57 be used in bidirectional configurations?
No, the 5KASMC28AHM3/57 is specified for unidirectional operation only, with polarity indicated by a cathode band. It is not rated for reverse-biased surge suppression. For bidirectional protection, a separate device such as the 5KASMC28CA (center-tapped or dual-diode configuration) would be required-not the 5KASMC28AHM3/57.
5KASMC28AHM3/57 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 5000W (5kW)
- 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)
5KASMC28AHM3/57 FAQ
1.How can I place an order for 5KASMC28AHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC28AHM3/57 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 5KASMC28AHM3/57 reliable?
The price and inventory of 5KASMC28AHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC28AHM3/57 is usually 5 days.
3.What payment methods are accepted for 5KASMC28AHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC28AHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC28AHM3/57?
5KASMC28AHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC28AHM3/57 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 5KASMC28AHM3/57?
For technical support, including 5KASMC28AHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC28AHM3/57 requirements.
6.How does Aetrix verify that 5KASMC28AHM3/57 is sourced from the original manufacturer or authorized distributors?
All 5KASMC28AHM3/57 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 5KASMC28AHM3/57 meets industry standards.
7.What is the process for return or replacement of 5KASMC28AHM3/57?
All 5KASMC28AHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC28AHM3/57, 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 5KASMC28AHM3/57 part is unused and in its original packaging.
Return procedure for 5KASMC28AHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC28AHM3/57 Tags
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