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Vishay General Semiconductor - Diodes Division 3KASMC22AHE3/57T
- Part No.:
- 3KASMC22AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHE3/57T.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
3KASMC22AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC22AHE3/57T datasheet, 3KASMC22AHE3/57T pinout, 3KASMC22AHE3/57T application, or 3KASMC22AHE3/57T equivalent, key selection criteria include clamping voltage (35.5 V at IPPM), AEC-Q101 qualification, MSL Level 1 rating, unidirectional polarity, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB mounting.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping performance across -65 °C to +185 °C operating range, with low incremental surge resistance and sub-nanosecond response time to transient events. Its 10/1000 μs waveform capability supports robust protection against inductive switching spikes and ESD-induced surges.
The device operates exclusively in unidirectional mode, with cathode denoted by color band, and is optimized for high-reliability automotive applications requiring compliance with AEC-Q101 and JEDEC J-STD-020 (peak reflow 260 °C). It delivers 84.5 A peak pulse current (IPPM) while maintaining clamping voltage ≤35.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum reverse working voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR (min/max) | 24.4 V / 26.9 V - breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 35.5 V - clamping voltage at 84.5 A peak pulse; limits downstream voltage stress during transients. |
| PPPM | 3000 W - peak pulse power handling per 10/1000 μs waveform; supports high-energy surge suppression. |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating. |
| RθJA | 77.5 °C/W - thermal resistance junction-to-ambient on standard pad layout; informs heatsinking requirements. |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress-test standard including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference. | Provides low VF (3.5 V @ 100 A) path during surge conduction; requires low-inductance grounding. |
| Cathode | Current exit terminal in forward bias; marked by color band; connected to protected line (e.g., signal or power rail). | Defines unidirectional clamping direction; must be placed between transient source and IC input. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable leakage (<1 μA at VWM) and long-term reliability at TJ = 150 °C. |
| High-temperature operation | Rated up to TJ = 185 °C - eliminates need for external derating in engine-control units and ADAS modules. |
| Peak pulse power | 3000 W (10/1000 μs) - suppresses ISO 7637-2 Pulse 1/2a/5a transients without failure. |
| Clamping performance | VC = 35.5 V at IPPM = 84.5 A - maintains <1.6× VWM ratio for tight protection margins on 24 V rails. |
| Manufacturing compliance | MSL Level 1 (260 °C peak reflow), JESD201 Class 2 whisker resistance, and AEC-Q101 qualification ensure production robustness. |
Applications
| Automotive Powertrain Control | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and gate drivers in engine control units exposed to load-dump and inductive kickback from solenoids and fuel injectors. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 24 V supply rail and MCU input, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or permanent damage to 3.3 V/5 V logic interfaces. |
Use Scenario: Safeguarding analog outputs of pressure and temperature sensors in factory automation PLCs subjected to relay contact bounce and motor drive noise. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA current loop output lines, absorbing fast-rising EFT bursts. Use Value: Maintains signal integrity with <1 μA leakage at 22 V, ensuring measurement accuracy remains unaffected during normal operation. |
| Automotive ADAS Camera Modules | Telecom Power Interface |
Use Scenario: Shielding FPD-Link III serial data lines and power inputs in rear-view and surround-view camera ECUs mounted near motors and inverters. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) unidirectional clamp on 12 V bias rail and differential video lines. Use Value: Clamps ISO 16750-2 pulses without distorting high-speed video signals due to fast response and minimal parasitic loading. |
Use Scenario: Front-end protection for PoE-powered network switches and base station RF modules facing lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input stage, coordinated with upstream GDT and downstream polymer PTC. Use Value: Handles 3000 W surges while surviving repeated 8.3 ms half-sine wave tests (IFSM = 200 A), ensuring field longevity. |
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 | Lower PPPM (400 W), higher RθJA (100 °C/W), same DO-214AC (SMA) package but smaller footprint and lower surge rating. | Not AEC-Q101 qualified; suitable for consumer-grade 24 V systems but not automotive under-hood use. | Select SMAJ22A only for cost-sensitive, non-automotive applications where 3000 W surge immunity is unnecessary. |
| SMCJ22A | Same DO-214AB (SMC) package, 3000 W PPPM, but VBR = 24.4–26.9 V and VC = 35.5 V identical; differs in marking code and tape/reel packaging (e.g., SMCJ22AHE3/57T). | Functionally identical clamping behavior and thermal specs; fully interchangeable in layout and electrical design. | SMCJ22A is a direct functional match with identical electrical and mechanical specs - verify reel code compatibility for procurement. |
Compared with SMAJ22A and SMCJ22A, the 3KASMC22AHE3/57T provides guaranteed AEC-Q101 qualification and tighter manufacturing controls for automotive deployment, while matching SMCJ22A's surge capability and thermal performance - making it preferred for mission-critical vehicle subsystems.
Availability
3KASMC22AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor interface protection, ADAS camera module design, and telecom DC power interface applications requiring stable component supply, long lifecycle support, and AEC-Q101 compliance.
Supply support for 3KASMC22AHE3/57T 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, high-temperature operation, and automotive qualification.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for AEC-Q101-compliant overvoltage protection in harsh automotive and industrial environments where thermal stability and surge immunity are critical.
FAQ
What is the clamping voltage of the 3KASMC22AHE3/57T at its rated peak pulse current?
The 3KASMC22AHE3/57T has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 84.5 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures reliable protection of downstream 24 V-rated components without exceeding safe voltage thresholds. The 3KASMC22AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC22AHE3/57T qualified for automotive applications?
Yes, the 3KASMC22AHE3/57T is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). It is rated for continuous operation up to TJ = 185 °C and meets MSL Level 1 reflow requirements - making it suitable for engine control units, ADAS modules, and other under-hood automotive systems.
What package type does the 3KASMC22AHE3/57T use, and what are its key mechanical features?
The 3KASMC22AHE3/57T uses the DO-214AB (SMC) surface-mount package, with dimensions of 6.22 mm × 5.59 mm × 2.90 mm. Key features include UL 94 V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and cathode identification via molded color band. The 3KASMC22AHE3/57T also passes JESD201 Class 2 whisker testing.
How does the 3KASMC22AHE3/57T compare to the SMAJ22A in terms of surge handling capability?
The 3KASMC22AHE3/57T delivers 3000 W peak pulse power (10/1000 μs), whereas the SMAJ22A is rated for only 400 W under the same waveform. This 7.5× higher energy absorption makes the 3KASMC22AHE3/57T suitable for severe automotive transients like load dump and ISO 7637-2 Pulse 5a, while the SMAJ22A is limited to lighter-duty consumer or industrial applications.
What is the maximum reverse leakage current of the 3KASMC22AHE3/57T at its stand-off voltage?
The 3KASMC22AHE3/57T exhibits a maximum reverse leakage current (IR) of 1.0 μA at its 22 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated junction temperature (TJ = 150 °C), leakage remains ≤10 μA - confirming stable performance in high-temperature environments. This low leakage preserves signal integrity in precision sensor and communication circuits.
3KASMC22AHE3/57T 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:
- 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 (SMCJ)
3KASMC22AHE3/57T FAQ
1.How can I place an order for 3KASMC22AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHE3/57T 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 3KASMC22AHE3/57T reliable?
The price and inventory of 3KASMC22AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC22AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHE3/57T?
3KASMC22AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHE3/57T 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 3KASMC22AHE3/57T?
For technical support, including 3KASMC22AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC22AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHE3/57T 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 3KASMC22AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHE3/57T?
All 3KASMC22AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHE3/57T, 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 3KASMC22AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC22AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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