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Vishay General Semiconductor - Diodes Division 5KASMC22AHM3_A/H
- Part No.:
- 5KASMC22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC22AHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,049
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Product details
Overview
5KASMC22AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-reliability overvoltage protection in automotive and industrial systems. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 35.5 V max under 140.8 A surge current, and operates up to 185 °C junction temperature. Used to protect MOSFETs, sensor signal lines, and ICs against inductive switching transients.
For engineers reviewing the 5KASMC22AHM3_A/H datasheet, 5KASMC22AHM3_A/H pinout, 5KASMC22AHM3_A/H application, or 5KASMC22AHM3_A/H equivalent, key selection criteria include its 22 V stand-off voltage, AEC-Q101 qualification, SMC (DO-214AB) package, 100 °C/W junction-to-ambient thermal resistance, and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under high-temperature stress. Its 185 °C maximum junction temperature and MSL Level 1 rating support automotive under-hood deployment without derating penalties.
The device exhibits low incremental surge resistance and fast response time-critical for clamping sub-microsecond transients induced by inductive load switching. Clamping voltage is specified at 35.5 V for 140.8 A (10/1000 μs), with 0.086 %/°C temperature coefficient of breakdown voltage.
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 triggering above system operating voltage |
| VC @ IPPM | 35.5 V at 140.8 A - Clamping level limits downstream component stress during 5000 W surge events |
| PPPM | 5000 W (10/1000 μs) - Supports robust protection against automotive load-dump and ISO 7637-2 pulses |
| TJ max | +185 °C - Enables placement near heat sources in engine control units and power modules |
| RθJA | 100 °C/W - Requires minimum recommended pad layout for thermal management in PCB designs |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during clamping | Connected to protected circuit's ground or low-side reference; defines unidirectional conduction path |
| Cathode | Current exit point during clamping | Connected to protected line (e.g., sensor supply or signal); marked by visible band on case |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable leakage and breakdown behavior across 185 °C operation |
| Peak pulse power | 5000 W capability enables single-device protection against severe transients per ISO 7637-2 Pulse 5a |
| Thermal reliability | MSL Level 1 rating and 260 °C lead-free reflow compatibility support automated assembly without popcorn risk |
| Clamping performance | Low VC/VBR ratio (1.38×) minimizes let-through energy during surge events |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 22 V. Use Value: Withstands 5000 W pulses and operates reliably at 185 °C, eliminating need for derating in under-hood modules. | Use Scenario: Shielding analog sensor signal lines (e.g., pressure, temperature) from ESD and inductive coupling in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground to suppress fast transients without distorting millivolt-level signals. Use Value: 35.5 V clamping voltage prevents damage to precision ADC inputs while maintaining signal integrity. |
| Motor Drive Gate Protection | Telecom DC Power Input Stage |
Use Scenario: Safeguarding high-side MOSFET gate drivers in BLDC inverters from shoot-through-inducing voltage spikes. IC Role / Device Role / Timing Role: TVS placed across gate-source terminals to clamp transient overvoltage before driver IC exceeds absolute maximum ratings. Use Value: Fast response time and low incremental resistance limit gate overshoot to safe levels during rapid switching transitions. | Use Scenario: Front-end protection for 48 V telecom power supplies exposed to lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Primary surge suppression device on DC input rail, coordinated with upstream MOVs and fuses. Use Value: AEC-Q101 qualification and 5000 W rating provide field-proven reliability in harsh outdoor infrastructure environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower peak pulse power (600 W), same VWM and package (SMB/DO-214AA) | Not rated for 185 °C operation; limited to commercial/industrial ambient conditions | Select when cost sensitivity outweighs automotive-grade thermal and surge requirements |
| 5.0SMDJ22A | Higher PPPM (5000 W), same VWM, larger SMD package (SMC/DO-214AB identical footprint) | Same AEC-Q101 qualification but higher VC (37.5 V) increases let-through stress on protected circuit | Choose if board layout allows identical SMC footprint and higher clamping voltage is acceptable |
Compared with SMBJ22A and 5.0SMDJ22A, the 5KASMC22AHM3_A/H provides optimal balance of automotive-grade thermal margin (185 °C), precise 35.5 V clamping, and SMC footprint compatibility-making it preferred for space-constrained, high-reliability power electronics where both surge immunity and long-term stability are critical.
Availability
5KASMC22AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, motor drive gate protection, and telecom DC power input stage applications requiring stable component supply and AEC-Q101 compliance.
Supply support for 5KASMC22AHM3_A/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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 5KASMC series is engineered specifically for high-energy transient suppression in demanding automotive and industrial environments, combining PAR® technology with AEC-Q101 validation and extended temperature operation.
FAQ
What is the maximum clamping voltage of the 5KASMC22AHM3_A/H under full-rated surge current?
The 5KASMC22AHM3_A/H has a maximum clamping voltage (VC) of 35.5 V when subjected to its peak pulse current (IPPM) of 140.8 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and reflects worst-case let-through voltage during surge events. The 5KASMC22AHM3_A/H maintains this specification across its qualified operating temperature range, supporting predictable protection design.
Is the 5KASMC22AHM3_A/H suitable for automotive under-hood applications?
Yes, the 5KASMC22AHM3_A/H is explicitly qualified to AEC-Q101 and rated for operation up to +185 °C junction temperature-making it suitable for under-hood automotive applications such as engine control units, body controllers, and ADAS power modules. Its MSL Level 1 rating and 260 °C reflow compatibility further ensure robustness in high-temperature manufacturing and field environments.
What does the "HM3_A/H" suffix indicate in the 5KASMC22AHM3_A/H part number?
The "HM3_A/H" suffix in 5KASMC22AHM3_A/H denotes halogen-free, RoHS-compliant construction (HM3), revision code "A", and packaging in 7-inch plastic tape and reel (H). The base "HM3" confirms compliance with JESD201 Class 2 whisker testing and UL 94 V-0 flammability rating-key requirements for automotive and industrial deployments where material safety and long-term reliability are mandated.
How does the thermal resistance of the 5KASMC22AHM3_A/H affect PCB layout?
The 5KASMC22AHM3_A/H has a typical RθJA of 100 °C/W when mounted on the minimum recommended pad layout. To maintain safe junction temperatures under sustained power dissipation, designers must follow Vishay's specified copper pad dimensions and thermal vias. Using the infinite heatsink condition (RθJM = 20.8 °C/W) is not practical in most SMT applications, so the 100 °C/W value governs real-world thermal design for the 5KASMC22AHM3_A/H.
Does the 5KASMC22AHM3_A/H support bidirectional transient suppression?
No, the 5KASMC22AHM3_A/H is a unidirectional TVS diode only, as confirmed in the Vishay datasheet. It conducts during positive transients on the cathode relative to anode and blocks in the reverse direction. For bidirectional protection, two 5KASMC22AHM3_A/H devices would need back-to-back configuration, or a dedicated bidirectional part like 5KASMC22CA must be selected instead.
5KASMC22AHM3_A/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):
- 140.8A
- Power - Peak Pulse:
- 5000W (5kW)
- 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)
5KASMC22AHM3_A/H FAQ
1.How can I place an order for 5KASMC22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC22AHM3_A/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 5KASMC22AHM3_A/H reliable?
The price and inventory of 5KASMC22AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC22AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC22AHM3_A/H?
5KASMC22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC22AHM3_A/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 5KASMC22AHM3_A/H?
For technical support, including 5KASMC22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC22AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC22AHM3_A/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 5KASMC22AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC22AHM3_A/H?
All 5KASMC22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC22AHM3_A/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 5KASMC22AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC22AHM3_A/H Tags
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