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Vishay General Semiconductor - Diodes Division 3KASMC22AHM3_B/I
- Part No.:
- 3KASMC22AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHM3_B/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,802
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Product details
Overview
3KASMC22AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 22 V stand-off voltage, 3000 W peak pulse power (10/1000 μs), 185 °C max junction temperature, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC22AHM3_B/I datasheet, 3KASMC22AHM3_B/I pinout, 3KASMC22AHM3_B/I application, or 3KASMC22AHM3_B/I equivalent, key selection criteria include clamping voltage at rated surge current, thermal resistance (RθJL = 18.3 °C/W), unidirectional polarity, MSL Level 1 rating, and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive transient stress. Its 185 °C TJ max enables operation in high-temperature engine bay and powertrain environments without derating penalties typical of lower-rated devices.
The device exhibits low incremental surge resistance and fast response time, enabling effective suppression of ESD and load-dump transients on signal and power lines. Clamping voltage is specified at 35.5 V for 84.5 A peak pulse current (10/1000 μs), with VBR = 24.4–26.9 V at 1 mA test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/typ/max) | 24.4 / 25.7 / 26.9 V at 1 mA - Ensures reliable breakdown onset within tight tolerance band |
| VC @ IPPM | 35.5 V at 84.5 A - Clamping voltage limits downstream IC stress during 10/1000 μs surge |
| PPPM | 3000 W (10/1000 μs) - Supports robust protection against ISO 7637-2 Pulse 5a/b load dump events |
| RθJL | 18.3 °C/W - Enables efficient heat transfer to PCB copper, critical for sustained surge handling |
| TJ max | +185 °C - Qualified for under-hood automotive applications without thermal derating below 150 °C |
| Polarity | Unidirectional - Protects only against positive transients relative to cathode; requires correct orientation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), halogen-free and RoHS-compliant per HM3 suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane for clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable leakage (<1 μA at VWM) and consistent VBR over temperature and lifetime |
| AEC-Q101 qualification (HM3 suffix) | Validated reliability for automotive powertrain, body control, and ADAS modules |
| 3000 W peak pulse power (10/1000 μs) | Meets stringent ISO 7637-2 Pulse 5a (load dump) immunity requirements |
| Low RθJL = 18.3 °C/W | Minimizes junction temperature rise during repeated surges, extending device life |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly without moisture sensitivity concerns |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of MCU I/O and CAN transceiver power rails against alternator load dump and inductive switching spikes in engine control units. IC Role / Device Role: Primary clamping element placed between 12 V supply rail and ground, shunting surge energy away from sensitive logic. Use Value: Withstands 3000 W pulses and operates up to +185 °C, eliminating need for derating in high-ambient under-hood locations. | Use Scenario: Safeguarding PLC analog input channels and gate driver supplies from motor back-EMF transients in variable frequency drives. IC Role / Device Role: Unidirectional TVS placed across sensor supply lines to clamp positive-going voltage excursions exceeding 22 V. Use Value: 35.5 V clamping voltage ensures downstream op-amps and ADCs remain within absolute maximum ratings during 84.5 A surges. |
| Automotive Body Electronics | Telecom Power Interface |
Use Scenario: ESD and surge protection for LIN bus transceivers and door module microcontrollers exposed to human contact and cable coupling. IC Role / Device Role: Localized TVS on each LIN node's VCC and data line, leveraging low capacitance and fast response. Use Value: Meets AEC-Q101 requirements and provides <1 μA leakage at 22 V, preserving battery drain budgets in always-on modules. | Use Scenario: Front-end protection of PoE-powered equipment DC inputs against lightning-induced surges on outdoor telecom lines. IC Role / Device Role: First-stage clamping device on 24–48 V DC input, coordinated with upstream GDT or MOV. Use Value: 3000 W rating and 18.3 °C/W RθJL allow dissipation of multiple high-energy transients without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22AHE3_A/H | Lower PPPM (400 W), same VWM (22 V), SMA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to consumer/industrial use | Select when space-constrained and surge energy is ≤400 W |
| SMCJ22AHE3_A/H | Same PPPM (3000 W), same SMC package, but HE3 (not HM3) - RoHS-compliant but not halogen-free | Identical automotive suitability except halogen content; may not meet strict OEM green material specs | Select when halogen-free requirement is waived and cost optimization is prioritized |
Compared with 3KASMC22AHM3_B/I, SMAJ22AHE3_A/H offers reduced surge capacity and no automotive qualification, while SMCJ22AHE3_A/H matches performance but lacks halogen-free certification-making 3KASMC22AHM3_B/I the sole option meeting full AEC-Q101 + halogen-free + 3000 W spec.
Availability
3KASMC22AHM3_B/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive interfaces, and telecom power input protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for 3KASMC22AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure focused on reliability and automotive-grade quality.
The 3KASMCxxA family is engineered specifically for high-energy transient suppression in harsh automotive and industrial environments, emphasizing high-temperature operation, AEC-Q101 qualification, and robust surge handling in compact SMC packages.
FAQ
What is the clamping voltage of the 3KASMC22AHM3_B/I at its rated peak pulse current?
The 3KASMC22AHM3_B/I has a maximum clamping voltage (VC) of 35.5 V at 84.5 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The 3KASMC22AHM3_B/I maintains this clamping performance across its full operating temperature range up to +185 °C.
Is the 3KASMC22AHM3_B/I suitable for automotive applications?
Yes, the 3KASMC22AHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials per the HM3 suffix. Its 185 °C maximum junction temperature, MSL Level 1 rating, and 3000 W surge capability make it suitable for engine control units, body electronics, and ADAS modules. The 3KASMC22AHM3_B/I meets automotive reliability and environmental stress requirements without derating in most under-hood deployments.
What does the "HM3" suffix indicate in 3KASMC22AHM3_B/I?
The "HM3" suffix in 3KASMC22AHM3_B/I denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this variant from HE3 (RoHS-compliant but not halogen-free) and confirms compliance with automotive material restrictions. The 3KASMC22AHM3_B/I also passes JESD201 Class 2 whisker testing and supports lead-free reflow up to 260 °C.
How does the thermal resistance of the 3KASMC22AHM3_B/I affect its surge handling capability?
The 3KASMC22AHM3_B/I has a typical junction-to-leads thermal resistance (RθJL) of 18.3 °C/W, enabling efficient heat transfer from the silicon die to the PCB copper. This low RθJL allows the 3KASMC22AHM3_B/I to sustain repeated 3000 W surges without excessive junction temperature rise, directly supporting reliability in high-duty-cycle automotive and industrial applications where thermal management is constrained.
What is the reverse leakage current of the 3KASMC22AHM3_B/I at its stand-off voltage?
The 3KASMC22AHM3_B/I exhibits a maximum reverse leakage current (IR) of 1.0 μA at 22 V (VWM) and 25 °C, and ≤5.0 μA at TJ = 150 °C. This ultra-low leakage preserves system power budget in always-on automotive modules and ensures minimal impact on high-impedance sensor bias networks. The 3KASMC22AHM3_B/I maintains this performance across its full -65 °C to +185 °C operating range.
3KASMC22AHM3_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)
3KASMC22AHM3_B/I FAQ
1.How can I place an order for 3KASMC22AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHM3_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 3KASMC22AHM3_B/I reliable?
The price and inventory of 3KASMC22AHM3_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 3KASMC22AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHM3_B/I?
3KASMC22AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHM3_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 3KASMC22AHM3_B/I?
For technical support, including 3KASMC22AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC22AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHM3_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 3KASMC22AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHM3_B/I?
All 3KASMC22AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHM3_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 3KASMC22AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC22AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC22AHM3_B/I Tags
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