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Vishay General Semiconductor - Diodes Division 5KASMC17AHM3/9A
- Part No.:
- 5KASMC17AHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC17AHM3/9A.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,135
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Product details
Overview
5KASMC17AHM3/9A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge clamping with 5000 W peak pulse power (10/1000 µs), 27.6 V maximum clamping voltage at 181.2 A peak pulse current, and 17 V stand-off voltage. It operates up to 185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 5KASMC17AHM3/9A datasheet, 5KASMC17AHM3/9A pinout, 5KASMC17AHM3/9A application, or 5KASMC17AHM3/9A equivalent, key selection criteria include clamping voltage vs. surge current, unidirectional polarity constraint, thermal resistance (RθJA = 100 °C/W), MSL Level 1 rating, and halogen-free RoHS-compliant HM3 packaging for high-reliability PCB assembly.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve fast response time and low incremental surge resistance. Its 185 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments and industrial control systems exposed to repetitive transients.
The device delivers 5000 W peak pulse power per 10/1000 µs waveform with a clamping ratio (VC/VBR) of ~1.46, based on 18.9–20.9 V breakdown at 1 mA and 27.6 V clamping at 181.2 A. It exhibits ≤2.0 µA reverse leakage at 17 V and 25 °C, rising to ≤50 µA at 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 17 V - Maximum continuous reverse operating voltage before significant conduction begins |
| Breakdown Voltage (VBR) | 18.9–20.9 V at 1 mA - Confirmed avalanche initiation range for reliable triggering |
| Clamping Voltage (VC) | 27.6 V at 181.2 A - Peak voltage seen by protected circuit during 5000 W transient |
| Peak Pulse Power (PPPM) | 5000 W (10/1000 µs) - Energy-handling capacity for lightning/surge immunity per IEC 61000-4-5 |
| Junction Temperature (TJ) | −65 to +185 °C - Enables operation in engine control units and industrial motor drives |
| Thermal Resistance (RθJA) | 100 °C/W - Requires minimum pad layout per datasheet to sustain 6.5 W power dissipation |
| Polarity | Unidirectional - Cathode-banded; blocks reverse voltage only, not bidirectional surges |
| Package | DO-214AB (SMCJ) - Standardized SMT footprint with 0.320" body length and J-STD-020 MSL Level 1 |
Pinout & Package
DO-214AB (SMCJ) package with two terminals: cathode (marked by color band) and anode. Mounting requires minimum recommended pad layout per datasheet Figure 5; leads are matte tin plated and whisker-tested per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when VWM exceeded |
| Anode | Reference/ground return path | Typically tied to system ground; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics per stress test requirements |
| 185 °C junction capability | Enables placement near heat sources (e.g., power MOSFETs, DC-DC converters) without derating |
| 5000 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity with margin for design robustness |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling |
| Halogen-free, RoHS-compliant HM3 suffix | Complies with automotive material restrictions (e.g., VW 80101) and environmental directives |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller GPIO and CAN transceiver lines from load-dump and inductive switching transients in 12 V vehicle electrical systems. IC Role / Device Role: Primary clamping element placed between signal line and chassis ground to limit voltage excursion below IC absolute maximum ratings. Use Value: Clamps to 27.6 V at 181.2 A, ensuring downstream 3.3 V/5 V logic remains within safe operating area during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 24 V digital input optocouplers against field-wiring induced surges in factory automation cabinets. IC Role / Device Role: Front-end transient suppressor on dry-contact input channels subject to relay coil kickback and ESD. Use Value: Withstands 5000 W pulses while maintaining <2 µA leakage at 17 V, preserving input threshold accuracy and long-term sensor interface stability. |
| Telecom Base Station Power Supply | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding DC-DC converter feedback resistors and error amplifiers from AC line surge coupling via shared ground planes. IC Role / Device Role: Secondary-level clamping device across isolated 5 V bias rails feeding precision analog circuits. Use Value: 100 °C/W RθJA allows direct mounting on compact PCBs without heatsinks, reducing BOM count and board space. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards operating at ambient up to 85 °C. IC Role / Device Role: Unidirectional TVS placed across motor terminals to clamp flyback voltage during PWM switching. Use Value: 185 °C TJ rating ensures stable clamping performance even when mounted adjacent to motor driver ICs generating localized heat. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | Same VWM (17 V), lower PPPM (600 W), DO-214AA (SMB) package (smaller footprint, higher RθJA) | Suitable for lower-energy transients (IEC 61000-4-2 ESD only); not rated for 10/1000 µs surges | Select SMBJ17A only if surge energy is ≤600 W and board space is constrained |
| 5.0SMDJ17A | Same VWM (17 V), identical PPPM (5000 W), but DO-214AB package with different thermal profile (RθJA = 120 °C/W) | Requires larger copper area or thermal vias to match 5KASMC17AHM3/9A's 6.5 W dissipation capability | Choose 5.0SMDJ17A only if existing layout accommodates higher thermal resistance or additional cooling |
Compared with SMBJ17A and 5.0SMDJ17A, the 5KASMC17AHM3/9A offers superior thermal management (RθJA = 100 °C/W) and AEC-Q101 validation-critical for automotive and industrial deployments where sustained surge immunity and long-term reliability are non-negotiable.
Availability
5KASMC17AHM3/9A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and consumer appliance motor controls requiring stable component supply across extended production lifecycles.
Supply support for 5KASMC17AHM3/9A 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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 5KASMC series is engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 compliance, 185 °C operation, and robust surge handling in compact SMCJ packages.
FAQ
What is the maximum clamping voltage of the 5KASMC17AHM3/9A under full-rated surge conditions?
The 5KASMC17AHM3/9A has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 181.2 A (10/1000 µs waveform). This value is measured per Figure 3 in the Vishay datasheet 89432 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 5KASMC17AHM3/9A maintains this clamping performance across its full operating temperature range.
Is the 5KASMC17AHM3/9A suitable for bidirectional transient protection?
No, the 5KASMC17AHM3/9A is unidirectional only, as confirmed in the Features section of the Vishay datasheet. It protects against positive transients on a line referenced to ground and cannot suppress negative-going surges. For bidirectional protection, a separate device such as a symmetric TVS array or a dedicated bidirectional part like SMAJ17A would be required. The 5KASMC17AHM3/9A must be installed with correct cathode orientation relative to the protected signal polarity.
Does the 5KASMC17AHM3/9A require derating at elevated ambient temperatures?
Yes, the 5KASMC17AHM3/9A must be derated above 25 °C ambient per Figure 2 in datasheet 89432. Its peak pulse power capability decreases linearly with increasing junction temperature, reaching ~70 % of 5000 W at 100 °C ambient (assuming typical board thermal conditions). Designers must apply the published derating curve and verify thermal design using RθJA = 100 °C/W and RθJM = 20.8 °C/W to ensure the 5KASMC17AHM3/9A stays within its 185 °C TJ limit.
What does the "HM3/9A" suffix indicate in the 5KASMC17AHM3/9A part number?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. The "/9A" indicates packaging in 13-inch plastic tape and reel with a base quantity of 3500 units, per Vishay's ordering information table. This distinguishes it from variants like /57 (7-inch reel, 850 units) and confirms full compliance with automotive material and assembly standards. The 5KASMC17AHM3/9A meets all requirements specified for the HM3 base P/N.
Can the 5KASMC17AHM3/9A replace older SMCJ-series TVS diodes in existing designs?
The 5KASMC17AHM3/9A is a direct form-fit-function replacement for legacy SMCJ17A devices in DO-214AB packages, sharing identical mechanical dimensions, pinout, and soldering requirements. However, it adds AEC-Q101 qualification, 185 °C operation, and improved thermal resistance. No PCB changes are needed, but designers should verify that the tighter VBR range (18.9–20.9 V) and lower leakage align with system-level surge margin requirements before migration to the 5KASMC17AHM3/9A.
5KASMC17AHM3/9A 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- 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)
5KASMC17AHM3/9A FAQ
1.How can I place an order for 5KASMC17AHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC17AHM3/9A 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 5KASMC17AHM3/9A reliable?
The price and inventory of 5KASMC17AHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC17AHM3/9A is usually 5 days.
3.What payment methods are accepted for 5KASMC17AHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC17AHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC17AHM3/9A?
5KASMC17AHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC17AHM3/9A 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 5KASMC17AHM3/9A?
For technical support, including 5KASMC17AHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC17AHM3/9A requirements.
6.How does Aetrix verify that 5KASMC17AHM3/9A is sourced from the original manufacturer or authorized distributors?
All 5KASMC17AHM3/9A 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 5KASMC17AHM3/9A meets industry standards.
7.What is the process for return or replacement of 5KASMC17AHM3/9A?
All 5KASMC17AHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC17AHM3/9A, 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 5KASMC17AHM3/9A part is unused and in its original packaging.
Return procedure for 5KASMC17AHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC17AHM3/9A Tags
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