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Vishay General Semiconductor - Diodes Division 5KASMC20AHM3/57
- Part No.:
- 5KASMC20AHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC20AHM3/57.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,500
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Product details
Overview
5KASMC20AHM3/57 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 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 5000 W peak pulse power (10/1000 µs), 154.3 A peak pulse current, and clamps to ≤32.4 V at rated surge. It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the 5KASMC20AHM3/57 datasheet, 5KASMC20AHM3/57 pinout, 5KASMC20AHM3/57 application, or 5KASMC20AHM3/57 equivalent, key selection criteria include unidirectional polarity, DO-214AB (SMCJ) package compatibility, AEC-Q101 qualification, 185 °C junction temperature rating, and low clamping voltage under 5000 W transients.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to transient overvoltages. Its junction design delivers low incremental surge resistance and excellent clamping performance with <32.4 V clamping voltage at 154.3 A IPPM.
Rated for operation from –65 °C to +185 °C, it meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive reliability. The device is intended for single-polarity surge suppression where reverse leakage must remain ≤2.0 µA at 20 V and 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuit. |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on during surges. |
| PPPM | 5000 W - Peak pulse power handling capability with 10/1000 µs waveform; supports high-energy lightning or inductive-switching transients. |
| IPPM | 154.3 A - Peak surge current the device safely clamps without failure; determines minimum trace/solder joint robustness needed. |
| VC | ≤32.4 V - Clamping voltage at IPPM; defines maximum voltage imposed on downstream components during worst-case surge. |
| TJ max | +185 °C - Maximum junction temperature rating; enables use in under-hood automotive or high-ambient industrial environments. |
| Polarity | Unidirectional - Protects against positive transients only; requires correct orientation relative to DC bias. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during positive transients. |
| Cathode | High-side surge input terminal | Connected to line being protected; accepts transient energy and routes it to ground via anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validated for automotive-grade deployment including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak without preconditioning-compatible with standard SMT assembly. |
| Low clamping ratio (VC/VBR) | ~1.39 - Minimizes overvoltage exposure to protected ICs while maintaining robust surge margin. |
| 100 °C/W RθJA | Thermal resistance enables effective heat dissipation on standard PCB pad layouts without heatsinking. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power rail to clamp transients before they reach MCU or CAN transceivers. Use Value: Withstands 5000 W surges and operates up to 185 °C, meeting ISO 7637-2 Pulse 5a requirements for under-hood modules. |
Use Scenario: Surge suppression on 24 V control inputs of variable-frequency drives exposed to contactor switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between logic input and ground to prevent false triggering or latch-up. Use Value: 20 V VWM matches typical 24 V system tolerances; 32.4 V clamping protects 3.3 V/5 V interface ICs downstream. |
| Telecom Power Supply Outputs | Consumer Sensor Signal Lines |
Use Scenario: Secondary-side overvoltage protection on isolated DC/DC converters powering base station radios. IC Role / Device Role / Timing Role: Fast-response TVS shunting output rail to ground during transformer flyback overshoot or feedback loop faults. Use Value: 154.3 A IPPM handles multi-cycle surges; DO-214AB footprint allows compact placement near connector entry points. |
Use Scenario: ESD and surge protection for analog outputs of automotive cabin temperature or pressure sensors. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with sensor output traces to suppress coupling from nearby ignition systems. Use Value: Sub-2 µA leakage at 20 V preserves microamp-level sensor accuracy; AEC-Q101 ensures field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same DO-214AC (SMA) package; lower PPPM (400 W), higher VC (32.4 V), same VWM (20 V). | Not suitable for 5000 W transients; limited to low-energy ESD or board-level coupling events. | Select only when surge energy is ≤400 W and space constraints favor SMA over SMCJ. |
| SMCJ20A | Identical DO-214AB (SMCJ) package and 5000 W rating; differs in marking code and minor thermal resistance (RθJA = 100 °C/W vs. 95 °C/W). | Functionally interchangeable in all 5KASMC20AHM3/57 applications; no layout or derating changes required. | Preferred for second-source flexibility where Vishay's HM3 suffix (halogen-free, AEC-Q101) is not mandatory. |
Compared with SMAJ20A and SMCJ20A, the 5KASMC20AHM3/57 provides identical surge capability and packaging but adds halogen-free construction, tighter VBR tolerance (22.2–24.5 V), and explicit AEC-Q101 validation-making it optimal for automotive OEM and Tier 1 production programs requiring full compliance documentation.
Availability
5KASMC20AHM3/57 is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, and telecom power supply outputs requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for 5KASMC20AHM3/57 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for industrial, automotive, and computing applications.
The 5KASMCxxA series was developed specifically for high-reliability transient suppression in harsh-environment electronics, emphasizing AEC-Q101 compliance, 185 °C operation, and 5000 W surge immunity in the DO-214AB package.
FAQ
What is the maximum clamping voltage of the 5KASMC20AHM3/57 under rated surge conditions?
The 5KASMC20AHM3/57 clamps to a maximum of 32.4 V when subjected to its rated 154.3 A peak pulse current (10/1000 µs waveform). This value is measured per Figure 3 in the Vishay datasheet 89432 and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events. Designers must ensure downstream components tolerate this clamped voltage at the specified current level.
Is the 5KASMC20AHM3/57 suitable for automotive applications?
Yes, the 5KASMC20AHM3/57 is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature, making it suitable for under-hood and powertrain applications. Its DO-214AB package meets MSL Level 1, and its construction is halogen-free and RoHS-compliant-fulfilling key requirements for automotive OEM and Tier 1 production. The 5KASMC20AHM3/57 is explicitly validated for load dump and inductive switching transient protection per ISO 7637-2.
What does the "HM3/57" suffix indicate in 5KASMC20AHM3/57?
The "HM3" suffix denotes a halogen-free, RoHS-compliant, and AEC-Q101-qualified version of the device, with matte tin-plated leads passing JESD 201 Class 2 whisker testing. The "/57" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This ordering code ensures traceability and compliance alignment for high-reliability manufacturing environments using the 5KASMC20AHM3/57.
How does the 5KASMC20AHM3/57 compare to standard SMAJ-series TVS diodes?
The 5KASMC20AHM3/57 delivers 5000 W peak pulse power in a DO-214AB (SMCJ) package, whereas SMAJ20A offers only 400 W in the smaller DO-214AC (SMA) case. This makes the 5KASMC20AHM3/57 appropriate for high-energy transients like load dump, while SMAJ20A suits ESD or low-energy coupling. Both share 20 V VWM, but the 5KASMC20AHM3/57 has tighter VBR tolerance and AEC-Q101 validation not found in standard SMAJ parts.
What is the thermal resistance of the 5KASMC20AHM3/57, and how does it affect PCB layout?
The 5KASMC20AHM3/57 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout. This value guides copper area allocation: designers should follow Vishay's suggested DO-214AB mounting pad dimensions (0.185" × 0.126") to achieve rated power dissipation. Exceeding 6.5 W continuous power or allowing ambient temperatures above 125 °C requires additional thermal relief, as the 5KASMC20AHM3/57's 185 °C TJmax leaves limited margin under high-power surge repetition.
5KASMC20AHM3/57 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- 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)
5KASMC20AHM3/57 FAQ
1.How can I place an order for 5KASMC20AHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC20AHM3/57 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 5KASMC20AHM3/57 reliable?
The price and inventory of 5KASMC20AHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC20AHM3/57 is usually 5 days.
3.What payment methods are accepted for 5KASMC20AHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC20AHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC20AHM3/57?
5KASMC20AHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC20AHM3/57 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 5KASMC20AHM3/57?
For technical support, including 5KASMC20AHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC20AHM3/57 requirements.
6.How does Aetrix verify that 5KASMC20AHM3/57 is sourced from the original manufacturer or authorized distributors?
All 5KASMC20AHM3/57 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 5KASMC20AHM3/57 meets industry standards.
7.What is the process for return or replacement of 5KASMC20AHM3/57?
All 5KASMC20AHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC20AHM3/57, 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 5KASMC20AHM3/57 part is unused and in its original packaging.
Return procedure for 5KASMC20AHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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