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Vishay General Semiconductor - Diodes Division 5KASMC24AHM3/9A
- Part No.:
- 5KASMC24AHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC24AHM3/9A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
5KASMC24AHM3/9A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge protection on power and signal lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 5000 W peak pulse power (10/1000 µs), 128.5 A peak pulse current (IPPM), and clamps to ≤38.9 V at rated surge current - deployed in automotive ECUs, industrial sensor interfaces, and telecom power rails.
For engineers reviewing the 5KASMC24AHM3/9A datasheet, 5KASMC24AHM3/9A pinout, 5KASMC24AHM3/9A application, or 5KASMC24AHM3/9A 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 = 100 °C/W.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its unidirectional architecture provides low clamping voltage and fast response (<1 ns) to transient overvoltages induced by inductive switching or ESD events.
Rated for 185 °C maximum junction temperature and qualified per AEC-Q101, it supports automotive under-hood and industrial high-temperature environments. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements, with matte tin-plated terminals solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients without premature leakage. |
| VC (Clamping Voltage) | ≤38.9 V at 128.5 A IPPM - Limits downstream voltage stress during 5000 W surge; critical for MOSFET/IC overvoltage survival. |
| PPPM (Peak Pulse Power) | 5000 W (10/1000 µs waveform) - Sustains high-energy lightning/surge events common in automotive ISO 7637-2 and IEC 61000-4-5 test profiles. |
| TJ max. | 185 °C - Enables reliable operation in engine control units, motor drives, and industrial power supplies where ambient exceeds 125 °C. |
| Polarity | Unidirectional - Protects DC-biased lines only; requires correct cathode orientation relative to system ground reference. |
| Package | DO-214AB (SMCJ) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; supports automated placement and reflow. |
Pinout & Package
DO-214AB (SMCJ) package with two terminals: cathode (marked by color band) and anode. Mounting pad layout per Vishay specification supports thermal dissipation on minimum recommended copper area or infinite heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when voltage exceeds VBR; polarity-sensitive installation required. |
| Anode | Reference / ground return | Typically tied to system ground plane; completes conduction path during clamping; must maintain low-inductance connection for effective suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validated for automotive applications including engine management, ADAS sensors, and infotainment power rails. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; compatible with high-volume SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce), enhancing protection fidelity. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental compliance mandates without compromising surge robustness or thermal performance. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protection of 12 V supply rail against load dump and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role: Primary clamping element placed between battery input and LDO/regulator input stage. Use Value: Clamps 5000 W surges to ≤38.9 V, preventing damage to microcontrollers and CAN transceivers while maintaining AEC-Q101 compliance. |
Use Scenario: Shielding 4–20 mA analog sensor outputs from field-induced transients in factory automation systems. IC Role / Device Role: Bidirectional protection on signal line (with series resistor), referenced to local ground. Use Value: Fast response and low clamping voltage preserve signal integrity across 0–10 V or 4–20 mA ranges during 2 kV EFT bursts. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Safeguarding AC/DC converter primary-side inputs against lightning-induced surges per IEC 61000-4-5 Level 4. IC Role / Device Role: First-line defense upstream of bridge rectifier and bulk capacitor. Use Value: 5000 W rating and 185 °C junction capability ensure sustained operation in outdoor telecom cabinets with wide ambient swings. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role: Flyback diode replacement with superior surge handling and tighter voltage control. Use Value: Unidirectional clamping limits reverse voltage spike to ≤38.9 V, protecting MOSFET gate drivers and MCU I/O pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A (Vishay) | Same DO-214AC (SMA) package; lower PPPM (400 W); VWM = 24 V; VC = 38.9 V at 10.3 A. | Limited to low-energy transients (e.g., board-level ESD); unsuitable for load dump or lightning surges. | Select when space-constrained layouts require smaller footprint and surge energy is <500 W. |
| SMCJ24A (Littelfuse) | DO-214AB package; identical VWM/VBR/VC specs; 5000 W rating; AEC-Q101 qualified; RθJA ≈ 100 °C/W. | Functionally interchangeable; minor differences in leakage current (ID = 2 μA vs. 5KASMC24AHM3/9A's 2 μA at 150 °C). | Drop-in alternative if dual-sourcing or inventory flexibility is required; verify tape/reel packaging compatibility. |
Compared with SMAJ24A-E3/5A and SMCJ24A, the 5KASMC24AHM3/9A delivers identical clamping performance in the same DO-214AB package but with Vishay-specific process enhancements for higher temperature stability and lower surge resistance - making it preferred for mission-critical automotive and industrial deployments.
Availability
5KASMC24AHM3/9A is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply, AEC-Q101 compliance, and high-temperature surge resilience.
Supply support for 5KASMC24AHM3/9A 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, with emphasis on reliability, high-temperature operation, and automotive-grade qualification.
The 5KASMCxxA family targets high-energy transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, 185 °C junction operation, and robust surge immunity in automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum junction temperature rating for the 5KASMC24AHM3/9A?
The 5KASMC24AHM3/9A is rated for a maximum junction temperature (TJ) of +185 °C, enabling use in under-hood automotive applications and high-ambient industrial environments. This rating is validated per AEC-Q101 stress testing and supported by thermal resistance values RθJA = 100 °C/W and RθJM = 20.8 °C/W. The 5KASMC24AHM3/9A maintains stable clamping performance up to this limit without parameter degradation.
Is the 5KASMC24AHM3/9A unidirectional or bidirectional?
The 5KASMC24AHM3/9A is a unidirectional TVS diode, meaning it conducts only when the cathode is positive relative to the anode - protecting DC-biased lines from positive-going transients. It does not suppress negative-going surges. Polarity is marked by a cathode band; incorrect orientation will prevent clamping. The 5KASMC24AHM3/9A is not suitable for AC line protection without external circuitry.
What does the "HM3/9A" suffix indicate in 5KASMC24AHM3/9A?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. The "/9A" specifies packaging: 3500 units per 13-inch diameter plastic tape-and-reel. This differs from /57 (850 units, 7-inch reel) and ensures compatibility with high-volume SMT pick-and-place equipment. The 5KASMC24AHM3/9A meets MSL Level 1 and requires no pre-baking.
How does the 5KASMC24AHM3/9A compare to standard SMAJ-series TVS diodes?
The 5KASMC24AHM3/9A delivers 5000 W peak pulse power in DO-214AB (SMCJ) package, whereas SMAJ24A offers only 400 W in smaller DO-214AC (SMA). This makes the 5KASMC24AHM3/9A suitable for load dump and lightning surges, while SMAJ24A is limited to board-level ESD. Both share 24 V VWM and ~38.9 V VC, but the 5KASMC24AHM3/9A adds AEC-Q101, 185 °C TJ, and lower surge resistance.
Can the 5KASMC24AHM3/9A be used in place of a standard rectifier diode?
No - the 5KASMC24AHM3/9A is a transient voltage suppressor, not a rectifier. It operates in reverse-bias avalanche mode only during overvoltage events and exhibits high leakage (>2 μA) above VWM. Using it as a rectifier would cause excessive power loss, thermal runaway, and failure. Rectification requires forward-conducting diodes like VS-15EWH06FN-M3; the 5KASMC24AHM3/9A serves exclusively for surge clamping.
5KASMC24AHM3/9A 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):
- -
- 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)
5KASMC24AHM3/9A FAQ
1.How can I place an order for 5KASMC24AHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC24AHM3/9A 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 5KASMC24AHM3/9A reliable?
The price and inventory of 5KASMC24AHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC24AHM3/9A is usually 5 days.
3.What payment methods are accepted for 5KASMC24AHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC24AHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC24AHM3/9A?
5KASMC24AHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC24AHM3/9A 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 5KASMC24AHM3/9A?
For technical support, including 5KASMC24AHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC24AHM3/9A requirements.
6.How does Aetrix verify that 5KASMC24AHM3/9A is sourced from the original manufacturer or authorized distributors?
All 5KASMC24AHM3/9A 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 5KASMC24AHM3/9A meets industry standards.
7.What is the process for return or replacement of 5KASMC24AHM3/9A?
All 5KASMC24AHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC24AHM3/9A, 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 5KASMC24AHM3/9A part is unused and in its original packaging.
Return procedure for 5KASMC24AHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC24AHM3/9A Tags
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