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Vishay General Semiconductor - Diodes Division 5KASMC33AHM3/9A
- Part No.:
- 5KASMC33AHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC33AHM3/9A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,860
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Product details
Overview
5KASMC33AHM3/9A 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 with 5000 W peak pulse power (10/1000 µs), 33 V stand-off voltage (VWM), and 53.3 V maximum clamping voltage (VC) at 93.8 A peak pulse current. It operates up to 185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 5KASMC33AHM3/9A datasheet, 5KASMC33AHM3/9A pinout, 5KASMC33AHM3/9A application, or 5KASMC33AHM3/9A equivalent, key selection considerations include its unidirectional polarity, low incremental surge resistance, fast response time, and compliance with MSL Level 1 (260 °C reflow).
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and high-temperature operation up to 185 °C. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20.8 °C/W junction-to-mount (RθJM) support reliable thermal performance on standard PCB pad layouts.
The device delivers 5000 W peak pulse power per IEC 61000-4-5 (10/1000 µs waveform), with 2.0 µA max reverse leakage at VWM = 33 V and 50 µA at TJ = 150 °C - enabling robust protection of sensitive ICs and MOSFETs against inductive switching transients and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - breakdown voltage tolerance ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 53.3 V at 93.8 A - clamping voltage limits transient energy delivered to downstream components during 5000 W surge. |
| PPPM | 5000 W (10/1000 µs) - peak pulse power rating validated per ANSI/IEEE C62.35, suitable for automotive load-dump and ISO 7637-2 compliance. |
| TJ max | 185 °C - enables use in under-hood automotive modules and industrial environments without derating. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114. |
| Package | DO-214AB (SMCJ) - industry-standard surface-mount outline with cathode band marking and matte tin-plated leads solderable per J-STD-002. |
Pinout & Package
DO-214AB (SMCJ) package: molded epoxy case meeting UL 94 V-0 flammability rating; cathode indicated by color band; terminals are matte tin-plated, whisker-tested per JESD201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration; forms return path for surge current. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., power rail or signal); conducts surge current to ground when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term stability under repeated surge stress and high-temperature bias. |
| Peak pulse power | 5000 W (10/1000 µs) supports protection against severe transients like ISO 16750-2 load dump without external heat sinking. |
| Clamping ratio | VC/VBR ≈ 1.37 - low ratio minimizes voltage overshoot across protected devices during fast-rising transients. |
| Thermal robustness | RθJM = 20.8 °C/W enables effective heat transfer to PCB copper when mounted per recommended pad layout. |
| Process qualification | HM3 suffix denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive production use. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 33 V. Use Value: Withstands 5000 W pulses and operates reliably at 185 °C, eliminating need for derating in under-hood modules. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair to suppress sub-100 ns transients without signal distortion. Use Value: 2.0 µA leakage at 33 V preserves signal integrity in high-impedance sensor front-ends. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Guarding DC input ports of base station power supplies against lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail, coordinated with upstream MOVs and downstream regulators. Use Value: 53.3 V clamping voltage ensures downstream DC-DC converters remain within absolute maximum ratings during 5000 W surges. |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers from mains-borne transients (IEC 61000-4-4/5). IC Role / Device Role / Timing Role: Unidirectional TVS across bulk capacitor input to absorb repetitive switching spikes and surge energy. Use Value: AEC-Q101 qualification and MSL Level 1 compatibility ensure robustness through automated SMT reflow and field lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same VWM (33 V), lower PPPM = 600 W, DO-214AA (SMB) package, RθJA = 140 °C/W | Suitable for lower-energy surges (e.g., IEC 61000-4-2 ESD only); not rated for ISO 16750-2 load dump | Select when space-constrained layouts require smaller footprint and surge requirements are ≤600 W. |
| 5.0SMDJ33A | Same VWM (33 V), higher PPPM = 5000 W, DO-214AB package, but VC = 53.3 V identical; TJ max = 175 °C | Compatible for same high-energy applications but lacks AEC-Q101 qualification and HM3 halogen-free compliance | Choose when automotive qualification is not required and cost optimization is prioritized over process compliance. |
Compared with SMBJ33A and 5.0SMDJ33A, the 5KASMC33AHM3/9A uniquely combines 5000 W surge capability, 185 °C operation, AEC-Q101 qualification, and halogen-free HM3 construction - making it the only option qualified for high-reliability automotive power modules requiring full load-dump immunity and extended temperature life.
Availability
5KASMC33AHM3/9A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom line card surge suppression, and consumer power adapter input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for 5KASMC33AHM3/9A 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive-grade qualification.
The 5KASMC series is part of Vishay's PAR® (Protection Against Transients) family, engineered specifically for high-energy transient suppression in harsh environments including automotive engine control units, industrial motor drives, and telecom infrastructure.
FAQ
What is the clamping voltage of the 5KASMC33AHM3/9A at its rated peak pulse current?
The 5KASMC33AHM3/9A has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 93.8 A, measured using a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table of the Vishay datasheet (Doc. #89432) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 5KASMC33AHM3/9A maintains this clamping performance across its full operating temperature range.
Is the 5KASMC33AHM3/9A suitable for automotive applications?
Yes, the 5KASMC33AHM3/9A 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 control modules, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 reflow requirements, and the HM3 suffix confirms halogen-free, RoHS-compliant construction - all verified in Vishay Document #89432. The 5KASMC33AHM3/9A is explicitly listed in the AEC-Q101 qualified products table.
What does the "HM3/9A" suffix mean in 5KASMC33AHM3/9A?
The "HM3" suffix indicates halogen-free, RoHS-compliant construction and AEC-Q101 qualification; "9A" specifies the packaging format: 13-inch diameter plastic tape and reel containing 3500 units. This ordering code is defined in the Ordering Information section of the Vishay datasheet (Doc. #89432). The 5KASMC33AHM3/9A is distinct from variants like HM3/57 (7-inch reel, 850 units) and carries full traceability for automotive production use.
How does the thermal resistance of the 5KASMC33AHM3/9A affect PCB layout?
The 5KASMC33AHM3/9A has a typical junction-to-mount thermal resistance (RθJM) of 20.8 °C/W, meaning effective heat transfer requires adequate copper area beneath the cathode/anode pads per Vishay's recommended mounting pad layout. Its junction-to-ambient resistance (RθJA) is 100 °C/W on minimum pad layout - so doubling copper area can reduce temperature rise by ~20–30 °C. For high-reliability designs, the 5KASMC33AHM3/9A should be placed near thermal vias or ground planes to sustain 5000 W pulses without exceeding 185 °C junction temperature.
What is the reverse leakage current specification for the 5KASMC33AHM3/9A at elevated temperature?
At VWM = 33 V and TJ = 150 °C, the 5KASMC33AHM3/9A exhibits a maximum reverse leakage current (ID) of 50 µA, as specified in the Electrical Characteristics table (Document #89432). At room temperature (25 °C), the max leakage is 2.0 µA. This controlled leakage ensures minimal power loss in always-on automotive circuits while maintaining fast response and stable clamping behavior across the full -65 °C to +185 °C operating range of the 5KASMC33AHM3/9A.
5KASMC33AHM3/9A 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- 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)
5KASMC33AHM3/9A FAQ
1.How can I place an order for 5KASMC33AHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC33AHM3/9A 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 5KASMC33AHM3/9A reliable?
The price and inventory of 5KASMC33AHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC33AHM3/9A is usually 5 days.
3.What payment methods are accepted for 5KASMC33AHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC33AHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC33AHM3/9A?
5KASMC33AHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC33AHM3/9A 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 5KASMC33AHM3/9A?
For technical support, including 5KASMC33AHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC33AHM3/9A requirements.
6.How does Aetrix verify that 5KASMC33AHM3/9A is sourced from the original manufacturer or authorized distributors?
All 5KASMC33AHM3/9A 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 5KASMC33AHM3/9A meets industry standards.
7.What is the process for return or replacement of 5KASMC33AHM3/9A?
All 5KASMC33AHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC33AHM3/9A, 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 5KASMC33AHM3/9A part is unused and in its original packaging.
Return procedure for 5KASMC33AHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC33AHM3/9A Tags
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