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Vishay General Semiconductor - Diodes Division 3KASMC22AHM3_A/I
- Part No.:
- 3KASMC22AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHM3_A/I.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,897
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Product details
Overview
3KASMC22AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 35.5 V under 84.5 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC22AHM3_A/I datasheet, 3KASMC22AHM3_A/I pinout, 3KASMC22AHM3_A/I application, or 3KASMC22AHM3_A/I equivalent, this device serves as a high-reliability, AEC-Q101-qualified TVS for 22 V nominal DC bus lines where low clamping voltage, fast response, and MSL Level 1 solderability are critical.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable breakdown behavior and low incremental surge resistance. Its unidirectional configuration supports DC-biased protection paths, with a 24.4–26.9 V breakdown range at 1 mA test current and 1.0 μA max reverse leakage at 22 V standoff.
The DO-214AB (SMC) package enables high thermal dissipation (RθJL = 18.3 °C/W) and withstands 260 °C lead-free reflow per J-STD-020. It is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and meets AEC-Q101 stress testing requirements for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy surges without failure in automotive load-dump or ISO 7637-2 transient events |
| Stand-off Voltage (VWM) | 22 V - sets maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 24.4–26.9 V at 1 mA - defines reliable avalanche initiation threshold for clamping onset |
| Clamping Voltage (VC) | 35.5 V at 84.5 A - limits protected circuit voltage during worst-case surge, minimizing stress on downstream components |
| Junction Temperature Range | –65 °C to +185 °C - supports operation in engine compartments and industrial enclosures without derating |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and MSL Level 1 rating |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per AEC standard |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads; cathode indicated by color band; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Completes conduction path during surge, enabling low-impedance shunt to ground when clamping |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 22 V rail) | Receives transient energy and initiates avalanche breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable VBR over lifetime and temperature; prevents parametric drift in harsh environments |
| TJ = 185 °C capability | Enables placement near heat sources (e.g., power converters) without thermal derating penalties |
| 3000 W peak pulse power (10/1000 μs) | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surge immunity requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs and body control modules from load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rail to clamp surges before they reach LDOs and microcontrollers. Use Value: Clamps to 35.5 V at 84.5 A, limiting stress on 36 V-rated input stages while surviving repeated 185 °C junction conditions. |
Use Scenario: Safeguarding IGBT gate drivers and current-sense amplifiers in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-response surge suppressor on DC link sensing lines and auxiliary supply rails. Use Value: Sub-nanosecond response and low Rsurge ensure clamping occurs before sensitive analog front-ends saturate or latch up. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Shielding PoE-powered Ethernet switches from lightning-induced surges on 24–48 V auxiliary supplies. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC distribution net, upstream of DC/DC converters. Use Value: 3000 W rating handles multi-kV induced transients; DO-214AB footprint allows dense layout without compromising thermal relief. |
Use Scenario: Securing microcontroller I/O and relay driver circuits in washing machines and HVAC controllers subject to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS on 22 V logic supply rail feeding motor drivers and sensor interfaces. Use Value: 22 V VWM ensures no leakage during normal operation; 1.0 μA max IR at 22 V preserves low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5AT (Vishay) | Lower PPPM (400 W), same DO-214AC (SMA) package, VC = 35.5 V at 11.8 A | Targeted for lower-energy transients (IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 load dump | Select 3KASMC22AHM3_A/I when >1 kW surge handling and 185 °C operation are required. |
| 1.5KE22A (ON Semiconductor) | Higher VC (36.5 V at 82.2 A), axial-leaded DO-201AD package, no AEC-Q101 qualification | Not suitable for automated SMT assembly; lacks automotive reliability validation and MSL Level 1 compliance | Choose 3KASMC22AHM3_A/I for surface-mount production, automotive qualification, and tighter thermal design margins. |
Compared with SMAJ22A-E3/5AT and 1.5KE22A, the 3KASMC22AHM3_A/I provides triple the peak pulse power in an automotive-qualified SMT package with superior thermal robustness - making it the preferred choice for high-reliability 22 V rail protection where space, solderability, and transient severity are critical constraints.
Availability
3KASMC22AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, telecom power interfaces, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for 3KASMC22AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and ruggedized packaging.
The 3KASMC series was engineered specifically for high-temperature, high-surge automotive and industrial applications - delivering AEC-Q101-qualified transient protection with extended junction temperature capability and industry-leading pulse power density.
FAQ
What is the clamping voltage of the 3KASMC22AHM3_A/I under maximum surge conditions?
The 3KASMC22AHM3_A/I clamps to 35.5 V at its rated peak pulse current of 84.5 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and represents the maximum voltage seen across the device during worst-case surge events - ensuring downstream 36 V-rated components remain within safe operating limits. The 3KASMC22AHM3_A/I maintains this performance across its full –65 °C to +185 °C operating range.
Is the 3KASMC22AHM3_A/I qualified for automotive use?
Yes, the 3KASMC22AHM3_A/I is AEC-Q101 qualified and explicitly listed as such in Vishay's documentation (Document Number: 89962). It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - confirming suitability for under-hood and chassis-mounted automotive applications where reliability and thermal stability are mandatory.
What does the "_A/I" suffix mean in 3KASMC22AHM3_A/I?
The "_A/I" suffix in 3KASMC22AHM3_A/I indicates the packaging configuration: "A" denotes the base revision level of the HM3 package, and "I" specifies 13-inch diameter plastic tape-and-reel delivery with a 3500-unit base quantity. This matches Vishay's ordering code convention shown in the "Ordering Information" section of Document 89962.
Can the 3KASMC22AHM3_A/I replace the 3KASMC22A without layout changes?
Yes - the 3KASMC22AHM3_A/I shares identical DO-214AB (SMC) mechanical dimensions, pad layout, and polarity marking (cathode band) with the base 3KASMC22A. The HM3 suffix confirms RoHS-compliant, AEC-Q101-qualified construction with MSL Level 1 rating, making it a direct drop-in replacement in both form and function for new designs and legacy board re-spins.
What is the maximum reverse leakage current of the 3KASMC22AHM3_A/I at 22 V and 25 °C?
The maximum reverse leakage current (IR) of the 3KASMC22AHM3_A/I is 1.0 μA at VWM = 22 V and TA = 25 °C, as specified in the Electrical Characteristics table of Document 89962. At elevated temperatures (e.g., 150 °C), leakage rises to 10 μA - still well within safe limits for low-power standby circuits powered from the same rail.
3KASMC22AHM3_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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 76.1A
- 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)
3KASMC22AHM3_A/I FAQ
1.How can I place an order for 3KASMC22AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHM3_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 3KASMC22AHM3_A/I reliable?
The price and inventory of 3KASMC22AHM3_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 3KASMC22AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHM3_A/I?
3KASMC22AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHM3_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 3KASMC22AHM3_A/I?
For technical support, including 3KASMC22AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC22AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHM3_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 3KASMC22AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHM3_A/I?
All 3KASMC22AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHM3_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 3KASMC22AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC22AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC22AHM3_A/I Tags
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