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Vishay General Semiconductor - Diodes Division 5KASMC17AHM3_A/H
- Part No.:
- 5KASMC17AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC17AHM3_A/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,041
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Product details
Overview
5KASMC17AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown (VBR at 1 mA), 27.6 V clamping voltage at 181.2 A peak pulse current (10/1000 µs), and 5000 W peak pulse power. It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive power line protection.
For engineers reviewing the 5KASMC17AHM3_A/H datasheet, 5KASMC17AHM3_A/H pinout, 5KASMC17AHM3_A/H application, or 5KASMC17AHM3_A/H equivalent, key selection criteria include its 17 V VWM rating, low 27.6 V VC under 181.2 A surge, TJ = 185 °C capability, MSL Level 1 qualification, and halogen-free, RoHS-compliant HM3 packaging with matte tin terminals.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to transients. Its unidirectional polarity enables clamping only during reverse overvoltage events, with low incremental surge resistance ensuring minimal voltage overshoot during 10/1000 µs surges.
The device is characterized by a typical thermal resistance of 100 °C/W (junction-to-ambient, mounted on minimum pad layout) and 20.8 °C/W (junction-to-mount), supporting reliable operation in thermally constrained automotive and industrial PCB layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 12 V automotive systems. |
| VBR (min/typ/max) | 18.9 / 19.9 / 20.9 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC at IPPM | 27.6 V at 181.2 A (10/1000 µs) - Clamping voltage directly limits stress on downstream MOSFETs or ICs during ESD/lightning surges. |
| PPPM | 5000 W (10/1000 µs) - High-energy surge handling suitable for load-dump and inductive switching protection. |
| TJ max. | +185 °C - Enables use in engine bay or powertrain modules where ambient temperatures exceed 125 °C. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including HTGB, HTRB, and TCT. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; supports automated assembly. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; completes clamping path during reverse overvoltage. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply); conducts when voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling and humidity exposure. |
| High-temperature operation | TJ = 185 °C capability allows placement near heat sources (e.g., power converters) without derating penalties. |
| Low clamping ratio | VC/VBR ≈ 1.38 - Tight clamping margin preserves margin between protected IC's absolute maximum rating and clamped voltage. |
| Fast response time | < 1.0 ps - Sub-nanosecond turn-on prevents voltage overshoot from damaging sensitive gate oxides in MOSFETs. |
| MSL Level 1 | Reflow-compatible up to 260 °C peak - Eliminates moisture sensitivity concerns during standard SMT reflow processes. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before they reach DC/DC controllers or microcontrollers. Use Value: 27.6 V clamping voltage ensures downstream 36 V-rated regulators remain within safe operating area during 120 V/50 ms load dump events. |
Use Scenario: Safeguarding analog sensor signal lines (e.g., pressure, temperature) in factory automation PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential pair or single-ended output to suppress sub-microsecond spikes without distorting signal integrity. Use Value: 100 °C/W RθJA enables direct mounting on sensor board edge without heatsink, reducing BOM count while maintaining <100 ns response. |
| Telecom Power Supply Input | Consumer Device USB Port Protection |
Use Scenario: Front-end surge suppression on AC/DC adapter outputs feeding telecom base station control boards. IC Role / Device Role / Timing Role: Primary TVS on +48 V DC input rail, coordinated with secondary GDT or MOV for multi-stage protection per IEC 61000-4-5. Use Value: 5000 W PPPM rating handles combination wave (1.2/50 µs voltage + 8/20 µs current) surges up to 4 kV without degradation. |
Use Scenario: Overvoltage protection on VBUS line of USB-C ports in portable monitors or docking stations subject to hot-plug transients. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, placed immediately after connector to limit VBUS excursions during cable insertion/removal. Use Value: AEC-Q101 qualification ensures robustness against repeated mechanical stress and thermal cycling during field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | Same VWM (17 V), but lower PPPM (600 W), smaller SMB package (DO-214AA), RθJA = 150 °C/W. | Limited to low-energy transients (e.g., ESD only); unsuitable for load dump or high-current inductive switching. | Select SMBJ17A only for space-constrained consumer designs with <1 kV surge requirements. |
| 5.0SMDJ17A | Same VWM (17 V), higher PPPM (5000 W), larger SMC-like package (DO-214AB), but TJ max = 150 °C and not AEC-Q101 qualified. | Acceptable for industrial non-automotive use; lacks automotive qualification and high-temp margin for under-hood deployment. | Choose 5.0SMDJ17A for cost-sensitive industrial applications where AEC-Q101 and 185 °C operation are not required. |
Compared with SMBJ17A and 5.0SMDJ17A, the 5KASMC17AHM3_A/H delivers superior thermal robustness (185 °C vs. ≤150 °C), automotive qualification, and identical high-power surge capability in the same SMC footprint-enabling drop-in replacement in AEC-Q101-compliant designs without layout change.
Availability
5KASMC17AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution units, industrial PLC I/O modules, telecom DC power inputs, and consumer USB-C power delivery systems requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for 5KASMC17AHM3_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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The 5KASMCxxA series was designed specifically for demanding automotive and industrial transient suppression, combining AEC-Q101 qualification, 185 °C operation, and 5 kW surge capability in standardized SMC packaging.
FAQ
What is the clamping voltage of the 5KASMC17AHM3_A/H under full-rated surge current?
The 5KASMC17AHM3_A/H has a maximum clamping voltage (VC) of 27.6 V when subjected to its peak pulse current (IPPM) of 181.2 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by protected circuitry during worst-case surge events. The 5KASMC17AHM3_A/H maintains this clamping performance across its full operating temperature range due to its low temperature coefficient of VBR (0.082 %/°C).
Is the 5KASMC17AHM3_A/H suitable for 24 V industrial systems?
No-the 5KASMC17AHM3_A/H is specified for 17 V stand-off voltage (VWM), making it appropriate for nominal 12 V systems such as automotive battery rails. For 24 V industrial applications, Vishay's 5KASMC24A (VWM = 24 V) or 5KASMC26A (VWM = 26 V) variants should be selected instead. Using the 5KASMC17AHM3_A/H on a 24 V bus would cause continuous leakage and premature failure due to exceeding VWM.
Does the 5KASMC17AHM3_A/H have bidirectional polarity?
No-the 5KASMC17AHM3_A/H is unidirectional only, as explicitly stated in the Vishay datasheet. It functions as a reverse-biased Zener-type clamp and must be installed with cathode toward the protected line and anode to ground. Bidirectional variants (e.g., 5KASMC17CA) exist in the same family but are distinct orderable parts with different marking codes and electrical behavior.
What does the "HM3_A/H" suffix indicate in 5KASMC17AHM3_A/H?
The "HM3" denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified SMC package with matte tin terminals meeting JESD 201 Class 2 whisker resistance. The "_A/H" indicates revision A and tape-and-reel packaging in 7-inch reels (H = 850 units per reel). This suffix confirms compliance with automotive material and assembly standards-not just environmental directives.
Can the 5KASMC17AHM3_A/H replace older SMAJ17A devices?
The 5KASMC17AHM3_A/H offers higher surge capability (5000 W vs. 400 W), higher temperature rating (185 °C vs. 150 °C), and AEC-Q101 qualification compared to SMAJ17A-but it uses the larger SMC (DO-214AB) package versus SMAJ's SMA (DO-214AC). Physical replacement requires PCB pad redesign. Electrical substitution is possible only if layout accommodates SMC dimensions and thermal management accounts for its higher power dissipation.
5KASMC17AHM3_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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 181.2A
- 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 (SMC)
5KASMC17AHM3_A/H FAQ
1.How can I place an order for 5KASMC17AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC17AHM3_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 5KASMC17AHM3_A/H reliable?
The price and inventory of 5KASMC17AHM3_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 5KASMC17AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC17AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC17AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC17AHM3_A/H?
5KASMC17AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC17AHM3_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 5KASMC17AHM3_A/H?
For technical support, including 5KASMC17AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC17AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC17AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC17AHM3_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 5KASMC17AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC17AHM3_A/H?
All 5KASMC17AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC17AHM3_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 5KASMC17AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC17AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC17AHM3_A/H Tags
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