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Vishay General Semiconductor - Diodes Division 3KASMC33AHE3_A/I
- Part No.:
- 3KASMC33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC33AHE3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,632
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Product details
Overview
3KASMC33AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 33 V stand-off voltage, 53.3 V clamping voltage at 56.3 A peak pulse current, and 3000 W peak pulse power with 10/1000 µs waveform. It operates up to 185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC33AHE3_A/I datasheet, 3KASMC33AHE3_A/I pinout, 3KASMC33AHE3_A/I application, or 3KASMC33AHE3_A/I equivalent, this device serves as a high-reliability, high-temperature TVS for inductive load switching transients on power rails and signal lines in automotive ECUs, industrial sensors, and telecom interfaces.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and elevated ambient temperatures. Its unidirectional polarity and low incremental surge resistance enable precise overvoltage clamping on DC-biased lines without forward conduction during normal operation.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability and exhibits 77.5 °C/W typical junction-to-ambient thermal resistance when mounted on minimum recommended pad layout. Its 1.0 mA test current ensures consistent breakdown voltage verification across production lots.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum reverse working voltage before clamping begins; defines safe operating range for protected circuit. |
| VBR min/max | 36.7 V / 40.6 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 53.3 V at 56.3 A - Clamping voltage limits downstream component stress during 3000 W surge events. |
| PPPM | 3000 W - Peak pulse power handling with 10/1000 µs waveform supports IEC 61000-4-5 Level 4 immunity. |
| TJ max | 185 °C - Enables use in under-hood automotive environments without derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
| Package | DO-214AB (SMC) - Industry-standard SMT outline with 7.11 mm × 6.22 mm footprint and cathode band marking. |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by molded band. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential rail in unidirectional clamp configuration. |
| Cathode | Current exit point during clamping | Connected to protected line; color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term stability under thermal cycling and humidity. |
| High-temperature operation | Rated for continuous operation up to 185 °C junction temperature-no derating required below that limit. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a). |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak without moisture sensitivity concerns. |
| Uni-directional polarity | Prevents unintended conduction on DC-biased lines while delivering robust reverse surge suppression. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 33 V. Use Value: Limits peak voltage to 53.3 V during 3000 W pulses, protecting downstream regulators and microcontrollers rated for ≤60 V absolute maximum. |
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between sensor output and ground to absorb ESD and cable discharge events. Use Value: Clamps transients within nanoseconds while maintaining signal integrity due to minimal leakage (<1 μA at 33 V). |
| Telecom Interface Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Guarding RS-485 transceiver inputs against lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Standoff-rated TVS on differential bus lines referenced to local ground plane. Use Value: Withstands repeated 10/1000 µs surges up to 56.3 A while maintaining <1 µA leakage at 33 V, preserving common-mode rejection. |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Unidirectional clamp on regulated 5 V or 12 V output rail to prevent damage from feedback loop failure. Use Value: Delivers 3000 W pulse handling in compact SMC package-enables cost-effective, space-efficient protection without heatsinking. |
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-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower 400 W PPPM; 53.3 V VC at 7.5 A. | Lower surge capacity suits consumer-grade designs with less stringent IEC 61000-4-5 requirements. | Select when board space allows SMA footprint and surge energy is limited to ≤400 W. |
| 1.5KE33A (ON Semiconductor) | Through-hole DO-201AD package; 1500 W PPPM; 53.3 V VC at 28.3 A; higher RθJA (65 °C/W). | Requires through-hole assembly; not suitable for fully SMT automotive modules. | Choose only for legacy through-hole designs where rework tolerance and manual assembly are acceptable. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, the 3KASMC33AHE3_A/I delivers triple the pulse power (3000 W vs. 400 W/1500 W) in an AEC-Q101-qualified SMT package, enabling single-device compliance with automotive load dump standards without parallel devices or heatsinking.
Availability
3KASMC33AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom infrastructure equipment requiring stable component supply and full AEC-Q101 traceability.
Supply support for 3KASMC33AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMCxxA series was designed specifically for high-temperature, high-surge automotive and industrial applications where traditional TVS diodes fail under sustained thermal stress or repetitive transients.
FAQ
What is the clamping voltage of the 3KASMC33AHE3_A/I under maximum surge conditions?
The 3KASMC33AHE3_A/I has a maximum clamping voltage (VC) of 53.3 V at 56.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees controlled voltage limiting during standardized surge events. The 3KASMC33AHE3_A/I maintains this clamping performance across its full operating temperature range up to 185 °C junction temperature.
Is the 3KASMC33AHE3_A/I suitable for automotive applications?
Yes, the 3KASMC33AHE3_A/I is AEC-Q101 qualified and rated for 185 °C maximum junction temperature, making it suitable for under-hood and transmission-control module applications. Its DO-214AB (SMC) package meets MSL Level 1 and supports lead-free reflow up to 260 °C. The 3KASMC33AHE3_A/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix for transient voltage suppression.
What does the "_A/I" suffix mean in 3KASMC33AHE3_A/I?
The "_A/I" suffix in 3KASMC33AHE3_A/I indicates the packaging configuration: "I" denotes 13-inch diameter plastic tape and reel with 3500 units per reel. The "A" denotes revision level A of the base HM3 package variant, which is RoHS-compliant and AEC-Q101 qualified. The "HE3" portion reflects Vishay's internal manufacturing and testing code for this specific lot-controlled release of the 3KASMC33AHE3_A/I.
How does the 3KASMC33AHE3_A/I compare to standard SMAJ-series TVS diodes?
The 3KASMC33AHE3_A/I provides 3000 W peak pulse power-7.5× higher than the 400 W rating of SMAJ33A-while sharing the same 33 V stand-off voltage and 53.3 V clamping voltage. It also features enhanced thermal capability (185 °C TJ max vs. 150 °C) and AEC-Q101 qualification, whereas most SMAJ devices are commercial-grade. The 3KASMC33AHE3_A/I uses DO-214AB (SMC), slightly larger than DO-214AC (SMA), but offers superior surge robustness for mission-critical designs.
What is the reverse leakage current of the 3KASMC33AHE3_A/I at rated stand-off voltage?
The 3KASMC33AHE3_A/I specifies a maximum reverse leakage current (IR) of 1.0 µA at 33 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperature (150 °C), leakage remains ≤15 µA, ensuring minimal power loss and signal interference in always-on automotive modules. This low leakage is confirmed in the Electrical Characteristics table on page 2 of Vishay document 89962.
3KASMC33AHE3_A/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:
- 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):
- 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 (SMCJ)
3KASMC33AHE3_A/I FAQ
1.How can I place an order for 3KASMC33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC33AHE3_A/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_A/I reliable?
The price and inventory of 3KASMC33AHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC33AHE3_A/I?
3KASMC33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC33AHE3_A/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_A/I?
For technical support, including 3KASMC33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC33AHE3_A/I requirements.
6.How does Aetrix verify that 3KASMC33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC33AHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC33AHE3_A/I?
All 3KASMC33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC33AHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for 3KASMC33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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