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Vishay General Semiconductor - Diodes Division 3KASMC22AHE3_B/I
- Part No.:
- 3KASMC22AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHE3_B/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC22AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 22 V stand-off voltage (VWM), 25.7 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC22AHE3_B/I datasheet, 3KASMC22AHE3_B/I pinout, 3KASMC22AHE3_B/I application, or 3KASMC22AHE3_B/I equivalent, key selection criteria include clamping voltage (35.5 V at 84.5 A), unidirectional polarity, AEC-Q101 qualification, RoHS compliance, and SMC package thermal resistance (RθJL = 18.3 °C/W).
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 meets MSL Level 1 per J-STD-020 (260 °C peak reflow), features matte tin-plated leads solderable per J-STD-002/JESD22-B102, and is qualified to AEC-Q101 - confirming suitability for automotive powertrain and body electronics where reliability under thermal stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (nom) | 25.7 V at 1 mA - precise breakdown threshold enabling predictable surge turn-on |
| VC @ IPPM | 35.5 V at 84.5 A - clamping voltage limits downstream IC stress during 10/1000 μs transients |
| PPPM | 3000 W - peak pulse power handling capacity for short-duration inductive spikes |
| TJ max | +185 °C - enables operation in under-hood automotive environments without derating |
| RθJL | 18.3 °C/W - low junction-to-lead thermal resistance supports high-surge-current dissipation |
| Polarity | Unidirectional - allows forward conduction while protecting against reverse transients |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, cathode indicated by color band. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), with recommended minimum pad layout per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-side reference; completes clamping loop during transient events |
| Cathode | Protected line connection / surge sink | Connected to protected signal/power line; conducts surge current into anode when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±0.086 %/°C across -65 °C to +185 °C operating range |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy load-dump and inductive kick events without degradation |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking or special handling prior to assembly |
| Matte tin-plated leads | Ensures reliable solder joint formation per J-STD-002 and passes JESD22-B102 whisker testing |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and CAN transceiver I/O lines from load-dump transients and relay coil flyback in under-hood ECUs. IC Role / Device Role: Unidirectional TVS clamp placed between protected line and chassis ground to divert surge energy away from sensitive ASICs. Use Value: Clamps 35.5 V at 84.5 A, limiting voltage seen by downstream 3.3 V/5 V logic to safe levels during 100 V/100 ms load-dump events. | Use Scenario: Safeguarding analog input channels and digital enable signals on motor driver boards exposed to inductive switching noise. IC Role / Device Role: Standoff-rated TVS on signal lines interfacing with Hall-effect sensors and encoder feedback circuits. Use Value: 22 V VWM ensures no leakage during normal 24 V system operation; 185 °C rating maintains protection integrity near heat-generating IGBT modules. |
| Automotive Camera Module Power Input | Telecom Base Station DC Power Interface |
Use Scenario: Securing 5 V or 12 V power inputs to rear-view and surround-view camera modules subject to ISO 7637-2 Pulse 5a/b transients. IC Role / Device Role: Primary overvoltage suppression element placed upstream of DC-DC converters and image sensor power regulators. Use Value: 3000 W PPPM rating absorbs repetitive 10/1000 μs pulses without parameter shift; AEC-Q101 qualification confirms long-term field reliability. | Use Scenario: Protecting -48 V DC power distribution points in telecom base station cabinets from lightning-induced surges on outdoor feeder lines. IC Role / Device Role: Secondary surge clamp complementing primary gas discharge tube (GDT) protection on DC input bus. Use Value: Fast response time and low clamping voltage (35.5 V) prevent overvoltage propagation to downstream DC/DC modules during combined GDT-TVS staged protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller thermal mass), same VWM/VBR range | Not AEC-Q101 qualified; limited to consumer/industrial use below 150 °C | Select when space-constrained layouts require smaller footprint and automotive qualification is unnecessary |
| SMCJ22A (Littelfuse) | Same SMC package, 3000 W PPPM, but VBR min = 24.4 V (vs. 24.4 V min for 3KASMC22A), no AEC-Q101 documentation confirmed | Used in industrial power supplies; lacks published automotive qualification evidence | Select if AEC-Q101 is not required and alternate sourcing from Littelfuse is preferred for supply chain diversification |
Compared with SMAJ22A-E3/5A and SMCJ22A, the 3KASMC22AHE3_B/I delivers higher thermal robustness (185 °C vs. 150 °C), verified AEC-Q101 qualification, and tighter VBR tolerance (24.4–26.9 V vs. broader ranges), making it the only choice for mission-critical automotive power rail protection.
Availability
3KASMC22AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive I/O protection, and telecom DC power interface applications requiring stable component supply, AEC-Q101 validation, and high-temperature reliability.
Supply support for 3KASMC22AHE3_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, TVS devices, and optoelectronics with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMC series is designed specifically for high-energy transient suppression in harsh-environment applications - targeting automotive powertrain, ADAS, and industrial automation systems where 185 °C operation and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the 3KASMC22AHE3_B/I under a 10/1000 μs surge?
The 3KASMC22AHE3_B/I has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 84.5 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe voltage limits during transient events. The 3KASMC22AHE3_B/I achieves this clamping performance while maintaining low incremental surge resistance and stable behavior up to 185 °C junction temperature.
Is the 3KASMC22AHE3_B/I qualified to AEC-Q101?
Yes, the 3KASMC22AHE3_B/I is explicitly AEC-Q101 qualified, as confirmed in the Vishay document 88480 (Revision: 19-Jan-2024). The HE3 suffix denotes RoHS-compliant and AEC-Q101-qualified construction. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating the 3KASMC22AHE3_B/I for automotive powertrain and body electronics applications.
What package type does the 3KASMC22AHE3_B/I use, and what are its key mechanical features?
The 3KASMC22AHE3_B/I uses the SMC (DO-214AB) surface-mount package, measuring 7.75 mm × 6.22 mm × 2.62 mm. Key mechanical features include UL 94 V-0 compliant molding compound, matte tin-plated leads qualified per J-STD-002 and JESD22-B102 (Class 2 whisker test), and a cathode identification band. The 3KASMC22AHE3_B/I's RθJL of 18.3 °C/W supports efficient heat transfer to PCB copper during high-current surges.
How does the 3KASMC22AHE3_B/I differ from the 3KASMC22AHM3_B/I variant?
The 3KASMC22AHE3_B/I and 3KASMC22AHM3_B/I share identical electrical specifications and SMC packaging, but differ in material composition: the HE3 suffix indicates RoHS-compliant construction, while HM3 adds halogen-free compliance per IEC 61249-2-21. Both are AEC-Q101 qualified and rated for 185 °C operation. The 3KASMC22AHE3_B/I is suitable for general automotive applications; the HM3 version is selected when halogen-free requirements apply, such as in certain EU or Tier 1 OEM specifications.
What is the thermal resistance from junction to ambient (RθJA) for the 3KASMC22AHE3_B/I?
The typical thermal resistance from junction to ambient air (RθJA) for the 3KASMC22AHE3_B/I is 77.5 °C/W, measured under standard JEDEC conditions (single device on FR-4 board with minimum recommended pad layout). This value reflects natural convection cooling; actual thermal performance improves significantly with copper pour or thermal vias. For high-reliability designs, the lower RθJL of 18.3 °C/W is more relevant when estimating surge energy dissipation into PCB traces - a key parameter for the 3KASMC22AHE3_B/I in automotive and industrial applications.
3KASMC22AHE3_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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- 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)
3KASMC22AHE3_B/I FAQ
1.How can I place an order for 3KASMC22AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHE3_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 3KASMC22AHE3_B/I reliable?
The price and inventory of 3KASMC22AHE3_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 3KASMC22AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHE3_B/I?
3KASMC22AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHE3_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 3KASMC22AHE3_B/I?
For technical support, including 3KASMC22AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC22AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHE3_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 3KASMC22AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHE3_B/I?
All 3KASMC22AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHE3_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 3KASMC22AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC22AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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