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Vishay General Semiconductor - Diodes Division 3KASMC22AHE3_B/H
- Part No.:
- 3KASMC22AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHE3_B/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,556
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Product details
Overview
3KASMC22AHE3_B/H 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, 25.7 V nominal breakdown voltage at 1 mA, 35.5 V clamping voltage at 84.5 A peak pulse current, and 3000 W peak pulse power with 10/1000 μs waveform - deployed for automotive sensor line protection and MOSFET gate clamp circuits.
For engineers reviewing the 3KASMC22AHE3_B/H datasheet, 3KASMC22AHE3_B/H pinout, 3KASMC22AHE3_B/H application, or 3KASMC22AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C maximum junction temperature, and SMC package thermal resistance of 18.3 °C/W junction-to-leads.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature operation up to 185 °C, with low incremental surge resistance and fast response time suitable for suppressing inductive switching transients. Its unidirectional configuration provides forward conduction path during overvoltage events while maintaining low leakage (<1.0 μA at 22 V).
The device meets MSL level 1 per J-STD-020, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and passes JESD 201 class 2 whisker testing. The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum reverse stand-off voltage before significant leakage; defines safe operating window for protected signal lines. |
| VBR (nom) | 25.7 V at 1 mA - guaranteed breakdown onset; ensures predictable clamping initiation during ESD or load dump. |
| VC @ IPPM | 35.5 V at 84.5 A - peak clamped voltage limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 3000 W (10/1000 μs) - handles high-energy transients common in automotive 12 V systems and industrial motor drives. |
| TJ max | +185 °C - enables use in under-hood automotive environments and high-power industrial enclosures without derating. |
| Polarity | Unidirectional - provides forward conduction path; required for DC-biased lines such as power supply rails or gate drivers. |
| RθJL | 18.3 °C/W - low junction-to-lead thermal resistance supports reliable power dissipation when mounted on PCB copper pours. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded epoxy case meeting UL 94 V-0; cathode indicated by color band; terminals are matte tin-plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal during clamping | Connected to protected line's lower-potential side (e.g., ground-referenced signal or return path). |
| Cathode | Reverse-biased terminal during normal operation; clamping node | Connected to protected line's higher-potential side (e.g., 12 V rail or sensor output); color band identifies this end. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<1.0 μA) and long-term reliability at TJ = 150 °C and above. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| 3000 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge events without degradation. |
| Low RθJL = 18.3 °C/W | Allows effective heat transfer to PCB copper, supporting sustained 6.0 W power dissipation at TL = 75 °C. |
| MSL Level 1, 260 °C reflow compatible | Permits single-pass lead-free reflow assembly without moisture-induced damage or delamination. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Clamp |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between sensor output and microcontroller ADC input. Use Value: Clamps transients to ≤35.5 V, preventing ADC saturation and latch-up while maintaining <1.0 μA leakage at 22 V operating bias. | Use Scenario: Snubbing Miller-induced voltage spikes across high-side N-channel MOSFET gates in 3-phase inverters. IC Role / Device Role / Timing Role: Unidirectional TVS connected from gate to source to clamp positive-going overshoot during fast switching. Use Value: Limits gate-source voltage to 35.5 V during 84.5 A surge, preserving gate oxide integrity and enabling robust 100 kHz+ PWM operation. |
| Automotive Power Supply Rail Clamp | Telecom Line Interface Surge Suppression |
Use Scenario: Secondary protection on 12 V battery-fed ECUs after primary fuse and LC filter, guarding against ISO 16750-2 jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly across input rail and chassis ground. Use Value: Absorbs 3000 W pulses without failure, maintaining 22 V system compatibility and surviving repeated 185 °C junction temperature excursions. | Use Scenario: Protecting RS-485 transceiver inputs in outdoor base station equipment subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS on differential pair lines referenced to local ground plane. Use Value: Delivers 35.5 V clamping at 84.5 A with <10 ns response, preserving signal integrity while meeting IEC 61000-4-5 Level 4 immunity requirements. |
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 | Lower PPPM (400 W), same VWM (22 V), SMC package, non-AEC-Q101 | Not qualified for automotive; suitable for consumer/industrial secondary protection only | Select when AEC-Q101 is not required and surge energy is limited to <400 W. |
| SMCJ22AHE3_A/H | Same VWM (22 V), identical AEC-Q101 qualification and SMC package, but 1500 W PPPM rating | Limited to lower-energy transients; cannot replace 3KASMC22AHE3_B/H in ISO 7637-2 Pulse 5a scenarios | Choose where cost sensitivity outweighs need for full 3000 W capability and thermal margin. |
Compared with SMAJ22A-E3/5AT and SMCJ22AHE3_A/H, the 3KASMC22AHE3_B/H delivers 7.5× higher peak pulse power and automotive-grade reliability at identical footprint - critical for under-hood ECU designs requiring sustained 185 °C operation and ISO-compliant surge handling.
Availability
3KASMC22AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive gate clamping, and telecom line interface surge suppression requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 3KASMC22AHE3_B/H 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 and automotive-grade solutions.
The 3KASMC series is designed specifically for high-energy transient suppression in harsh-environment applications - targeting automotive powertrain, ADAS, and industrial automation systems demanding AEC-Q101 compliance and 185 °C junction capability.
FAQ
What is the clamping voltage of the 3KASMC22AHE3_B/H at its rated peak pulse current?
The 3KASMC22AHE3_B/H has a maximum clamping voltage (VC) of 35.5 V at 84.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 35.5 V during worst-case surge events. The 3KASMC22AHE3_B/H maintains this clamping performance across its full operating temperature range up to TJ = 185 °C.
Is the 3KASMC22AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC22AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified construction. It is rated for TJ = -65 °C to +185 °C and meets MSL Level 1 per J-STD-020 - making the 3KASMC22AHE3_B/H suitable for engine control units, body control modules, and ADAS sensor interfaces.
What package type does the 3KASMC22AHE3_B/H use, and what are its key mechanical features?
The 3KASMC22AHE3_B/H uses the SMC (DO-214AB) surface-mount package, with dimensions of 6.22 mm × 5.59 mm × 2.46 mm and UL 94 V-0 compliant molding compound. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 class 2 whisker testing. The cathode is marked by a visible color band, and the 3KASMC22AHE3_B/H is supplied in 7″ tape-and-reel format (850 units per reel).
How does the 3KASMC22AHE3_B/H differ from the SMCJ22AHE3_A/H in terms of surge capability?
The 3KASMC22AHE3_B/H delivers 3000 W peak pulse power (PPPM) with a 10/1000 μs waveform, whereas the SMCJ22AHE3_A/H is rated for 1500 W - exactly half. Both share identical VWM (22 V), AEC-Q101 qualification, and SMC packaging, but the 3KASMC22AHE3_B/H achieves higher energy handling via optimized junction passivation and thermal design. For ISO 7637-2 Pulse 5a compliance, the 3KASMC22AHE3_B/H is required.
What is the maximum junction temperature rating for the 3KASMC22AHE3_B/H, and why is it significant?
The 3KASMC22AHE3_B/H is rated for a maximum junction temperature (TJ max) of +185 °C, significantly exceeding standard industrial-grade TVS diodes (typically +150 °C). This enables reliable operation in under-hood automotive locations, high-power industrial enclosures, and other thermally aggressive environments. The 3KASMC22AHE3_B/H sustains full electrical specifications - including clamping voltage and leakage - up to this limit, validated per AEC-Q101 stress testing protocols.
3KASMC22AHE3_B/H 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/H FAQ
1.How can I place an order for 3KASMC22AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHE3_B/H 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/H reliable?
The price and inventory of 3KASMC22AHE3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHE3_B/H?
3KASMC22AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHE3_B/H 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/H?
For technical support, including 3KASMC22AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC22AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHE3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHE3_B/H?
All 3KASMC22AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHE3_B/H, 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/H part is unused and in its original packaging.
Return procedure for 3KASMC22AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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