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Vishay General Semiconductor - Diodes Division 3KASMC33AHE3_B/I
- Part No.:
- 3KASMC33AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC33AHE3_B/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
3KASMC33AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 33 V stand-off voltage, 3000 W peak pulse power (10/1000 μs), 53.3 V clamping voltage at 56.3 A surge current, and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of sensor signal lines and MOSFET gates.
For engineers reviewing the 3KASMC33AHE3_B/I datasheet, 3KASMC33AHE3_B/I pinout, 3KASMC33AHE3_B/I application, or 3KASMC33AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, 77.5 °C/W junction-to-ambient thermal resistance, and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature operation up to TJ = 185 °C, with low incremental surge resistance and fast response time critical for suppressing inductive switching transients. Its unidirectional architecture provides forward conduction capability while clamping reverse surges.
The device is characterized by a 0.091 %/°C temperature coefficient of breakdown voltage and exhibits 1.0 μA maximum reverse leakage at 33 V stand-off voltage, enabling reliable protection in automotive and industrial environments where thermal derating and low standby leakage are essential.
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) | 36.7 V - Minimum breakdown voltage at 1.0 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 53.3 V - Clamping voltage at 56.3 A peak pulse current; determines maximum transient voltage seen by downstream ICs. |
| PPPM | 3000 W - Peak pulse power handling with 10/1000 μs waveform; supports robust protection against ISO 7637-2 Load Dump and similar transients. |
| TJ max. | +185 °C - Maximum junction temperature rating; enables use in under-hood automotive applications without thermal derating penalties. |
| RθJA | 77.5 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs heatsinking requirements for sustained power dissipation. |
| Polarity | Unidirectional - Allows forward conduction during normal operation while clamping reverse transients; requires correct cathode orientation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded case meeting UL 94 V-0 flammability rating; cathode indicated by color band; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return node; completes clamping loop during surge events. |
| Cathode | Protected line connection / clamping output | Connected to the signal or power line requiring protection; voltage clamped to VC when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT; supports PPAP documentation. |
| Junction passivation | Optimized die passivation reduces leakage drift and improves long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 - no floor life limitation; can be mounted directly after opening tape-and-reel packaging. |
| Low VF at 100 A | 3.5 V maximum forward voltage enables efficient clamping during high-current surges without excessive self-heating. |
| 10/1000 μs waveform support | Rated for industry-standard lightning and load-dump transient profiles; validated per ANSI/IEEE C62.35 definitions. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input to clamp transients before they reach precision ADC front-end. Use Value: Maintains signal integrity with ≤53.3 V clamping at 56.3 A, preventing latch-up or damage to 3.3 V/5 V interface ICs under ISO 16750-2 pulses. |
Use Scenario: Safeguarding gate drivers and IGBTs in variable-frequency drives subjected to inductive kickback from motor windings. IC Role / Device Role / Timing Role: TVS connected across gate-source terminals to suppress Miller-induced voltage spikes during high dv/dt switching. Use Value: Fast response and low Rsurge limit gate overvoltage to safe levels (<60 V), avoiding unintended turn-on or oxide breakdown. |
| Telecom Line Interface Protection | Computer Power Rail Protection |
|
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from ESD and surge events on field wiring in outdoor base stations. IC Role / Device Role / Timing Role: Primary protection device on differential data lines, upstream of secondary polymer-based TVS or GDT. Use Value: 3000 W peak power rating handles multiple 10/1000 μs surges per IEC 61000-4-5 Level 4 without degradation. |
Use Scenario: Guarding +12 V and +5 V rails in server motherboards against hot-swap transients and backplane coupling noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC-DC converter outputs to absorb energy from sudden load changes or cable disconnection. Use Value: 185 °C TJ rating ensures stability during sustained high-temperature operation in densely packed server chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), same VWM/VBR range, non-AEC-Q101. | Not qualified for automotive under-hood use; suitable for consumer or industrial board-level protection where space is constrained. | Select when cost or board area is prioritized over automotive qualification and surge robustness. |
| SMCJ33A (Littelfuse) | Same SMC package, 33 V VWM, 3000 W PPPM, but rated to 175 °C TJ max and not AEC-Q101 qualified by default. | Lacks automotive qualification out-of-box; requires additional validation for automotive deployment. | Choose if sourcing flexibility is needed and AEC-Q101 compliance can be verified separately via lot testing. |
Compared with SMAJ33A-E3/5A and SMCJ33A, the 3KASMC33AHE3_B/I delivers higher thermal endurance (185 °C vs. 150–175 °C), guaranteed AEC-Q101 qualification, and MSL Level 1 handling - making it the preferred choice for mission-critical automotive and industrial designs requiring zero reflow risk and long-term reliability validation.
Availability
3KASMC33AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drives, telecom line interfaces, and computer power rail protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 3KASMC33AHE3_B/I 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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMCxxA family is engineered for high-energy transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and industrial equipment demanding extended temperature operation and repeatable clamping behavior.
FAQ
What is the clamping voltage of the 3KASMC33AHE3_B/I at its rated peak pulse current?
The 3KASMC33AHE3_B/I has a maximum clamping voltage (VC) of 53.3 V at 56.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The 3KASMC33AHE3_B/I maintains this clamping performance across its specified operating temperature range.
Is the 3KASMC33AHE3_B/I qualified for automotive applications?
Yes, the 3KASMC33AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88480. It undergoes stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT) to meet automotive reliability standards. The 3KASMC33AHE3_B/I is intended for under-hood and body-control module applications requiring certified transient protection.
What package type does the 3KASMC33AHE3_B/I use, and what are its key mechanical features?
The 3KASMC33AHE3_B/I uses the SMC (DO-214AB) surface-mount package, with dimensions of 6.22 mm × 5.59 mm × 2.41 mm and a cathode band marking. Its molding compound meets UL 94 V-0 flammability rating, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. The 3KASMC33AHE3_B/I also passes JESD 201 Class 2 whisker testing.
Does the 3KASMC33AHE3_B/I have moisture sensitivity limitations for PCB assembly?
No - the 3KASMC33AHE3_B/I is rated MSL Level 1 per J-STD-020, meaning it has no floor life restriction and may be mounted directly after opening the tape-and-reel packaging without baking. This eliminates moisture-related popcorning risk during reflow, supporting high-yield manufacturing for automotive and industrial production. The 3KASMC33AHE3_B/I achieves this through optimized mold compound formulation and leadframe plating.
How does the temperature coefficient affect the breakdown voltage of the 3KASMC33AHE3_B/I?
The 3KASMC33AHE3_B/I has a typical temperature coefficient of breakdown voltage (αT) of 0.091 %/°C. This means VBR increases linearly with junction temperature: for example, at TJ = 125 °C, VBR rises ~9.1 % above its 25 °C value (36.7–40.6 V), reaching approximately 40.0–44.2 V. This positive TC ensures stable clamping margin across wide temperature ranges, and the 3KASMC33AHE3_B/I datasheet provides the exact formula for precise calculation.
3KASMC33AHE3_B/I 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 56.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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)
3KASMC33AHE3_B/I FAQ
1.How can I place an order for 3KASMC33AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC33AHE3_B/I 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 3KASMC33AHE3_B/I reliable?
The price and inventory of 3KASMC33AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC33AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC33AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC33AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC33AHE3_B/I?
3KASMC33AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC33AHE3_B/I 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 3KASMC33AHE3_B/I?
For technical support, including 3KASMC33AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC33AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC33AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC33AHE3_B/I 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 3KASMC33AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC33AHE3_B/I?
All 3KASMC33AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC33AHE3_B/I, 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 3KASMC33AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC33AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC33AHE3_B/I Tags
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