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Vishay General Semiconductor - Diodes Division SM5S22AHE3_A/K
- Part No.:
- SM5S22AHE3_A/K
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S22AHE3_A/K.pdf
- Description:
- TVS DIODE 22VWM DO-218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,917
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Product details
Overview
SM5S22AHE3_A/K from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in DO-218AB package, designed for automotive load dump protection. It features 22 V stand-off voltage (VWM), 25.7 V nominal breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), 101 A clamping current (IPPM), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM5S22AHE3_A/K datasheet, SM5S22AHE3_A/K pinout, SM5S22AHE3_A/K application, or SM5S22AHE3_A/K equivalent, key selection criteria include unidirectional polarity, 175 °C junction rating, low leakage (<10 μA at VWM), ISO7637-2 compliance, and DO-218AB thermal performance with RθJM = 0.45 °C/W.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature transients. Its junction passivation enables reliable operation up to TJ = 175 °C and meets MSL Level 1 (245 °C peak reflow).
The device is optimized for automotive load dump suppression per ISO7637-2, with 3600 W surge capability at 10/1000 μs and 2800 W at 10/10 000 μs waveforms. Polarity is fixed: heatsink serves as anode, cathode is marked on case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; defines system bus voltage compatibility. |
| VBR (nom) | 25.7 V - Breakdown voltage at 5 mA test current; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 35.5 V - Clamping voltage at 101 A peak pulse; limits downstream voltage stress during surge. |
| PPPM (10/1000 μs) | 3600 W - Peak pulse power handling; supports high-energy automotive load dump transients. |
| TJ max | 175 °C - Maximum junction temperature; enables placement near hot engine compartments. |
| RθJM | 0.45 °C/W - Junction-to-mount thermal resistance; critical for heatsink-coupled PCB layout design. |
| ID @ VWM | <10 μA - Reverse leakage at rated stand-off; minimizes quiescent power loss in battery-sensitive systems. |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads, UL 94 V-0 molding compound, and JESD201 Class 2 whisker resistance. Mounting pad follows IPC-7351 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive terminal / thermal interface | Electrically connected to metal heatsink base; must be soldered to large copper pour for thermal management. |
| Cathode (Lead 1) | Transient current return path | Marked side of package; connects to protected line (e.g., 12 V rail); carries full surge current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Junction passivation | Enables stable VBR drift <0.086 %/°C and low leakage at 175 °C - essential for long-life under-hood deployment. |
| ISO7637-2 compliance | Meets Pulse 5a/b load dump requirements when mounted with proper heatsinking and trace inductance control. |
| MSL Level 1 | Rated for peak reflow at 245 °C - compatible with standard lead-free SMT assembly without moisture sensitivity concerns. |
Applications
| Automotive 12 V Power Distribution | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against alternator load dump surges up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤35.5 V at 101 A, preventing damage to downstream LDOs and microcontrollers. |
Use Scenario: Safeguarding ECU sensor power inputs exposed to inductive switching noise from solenoids and fuel injectors. IC Role / Device Role / Timing Role: Fast-response transient suppressor located at board edge connector, shunting surge energy to chassis ground. Use Value: Sub-1 ns response time and 3600 W surge capacity absorb repetitive 10/1000 μs spikes without degradation. |
| Start-Stop System Battery Interface | ADAS Camera Power Rail Protection |
Use Scenario: Securing start-stop system voltage regulators during repeated engine cranking and restart cycles. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V feed, thermally coupled to metal chassis via anode heatsink. Use Value: 175 °C operation and 0.45 °C/W RθJM enable stable clamping performance across -40 °C to +150 °C ambient. |
Use Scenario: Shielding high-resolution camera modules from EMI-induced transients on power lines routed near radar antennas. IC Role / Device Role / Timing Role: Low-leakage (≤10 μA) TVS placed upstream of image sensor power conditioning ICs. Use Value: Prevents false resets and pixel corruption by clamping sub-100 ns spikes while adding negligible standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S22AHM3_A/K | Same electrical specs and DO-218AB package; HM3 suffix indicates updated material formulation with enhanced halogen-free compliance. | Identical use cases; preferred for new designs due to "Not For New Designs" status of HE3 variant. | Select SM5S22AHM3_A/K for production ramp; SM5S22AHE3_A/K remains viable for legacy BOM continuity. |
| SMAJ22A | Lower PPPM (400 W), SMA package (RθJA ≈ 60 °C/W), no AEC-Q101 qualification, higher leakage (≤50 μA). | Limited to non-automotive industrial or consumer applications with lower surge energy and ambient temperature. | Only consider SMAJ22A if cost is primary constraint and automotive qualification, thermal performance, or ISO7637-2 compliance are not required. |
Compared with SM5S22AHE3_A/K, SM5S22AHM3_A/K offers identical protection performance with improved environmental compliance, while SMAJ22A provides basic clamping at reduced surge capacity and reliability - making it unsuitable for automotive load dump duty.
Availability
SM5S22AHE3_A/K is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit (ECU) protection, and start-stop system interfaces requiring stable component supply and AEC-Q101 assurance.
Supply support for SM5S22AHE3_A/K 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 and automotive-grade validation.
The SM5SxxA family is engineered specifically for high-energy automotive transient suppression, targeting load dump, inductive switching, and ISO7637-2 compliance in harsh under-hood environments.
FAQ
What is the polarity configuration of the SM5S22AHE3_A/K?
The SM5S22AHE3_A/K is unidirectional, with the metal heatsink serving as the anode and Lead 1 (marked side) as the cathode. This configuration requires correct orientation during PCB layout to ensure proper clamping direction toward ground or chassis return. The polarity is fixed and cannot be reversed in circuit operation.
Is the SM5S22AHE3_A/K qualified for automotive applications?
Yes, the SM5S22AHE3_A/K is AEC-Q101 qualified and rated for operation from -55 °C to +175 °C junction temperature. It meets ISO7637-2 load dump requirements and is intended for under-hood automotive systems such as ECUs, body control modules, and start-stop power interfaces.
What does the "HE3" suffix mean in SM5S22AHE3_A/K?
The "HE3" suffix denotes RoHS-compliant, halogen-free construction with matte tin-plated leads and JESD201 Class 2 whisker resistance. The "H" confirms AEC-Q101 qualification, and "E3" specifies Pb-free, non-halogen termination meeting Vishay's material categorization standard.
How does the thermal performance of SM5S22AHE3_A/K compare to SMA package TVS diodes?
The SM5S22AHE3_A/K in DO-218AB achieves RθJM = 0.45 °C/W - significantly better than SMA packages (~5–10 °C/W). This allows effective heat transfer to a PCB copper pour or external heatsink, enabling sustained 3600 W surge handling where SMA devices would thermally saturate.
Why is SM5S22AHE3_A/K marked as "Not For New Designs"?
Vishay designates SM5S22AHE3_A/K as "Not For New Designs" because the newer SM5S22AHM3_A/K variant offers identical electrical performance with enhanced material compliance (e.g., updated halogen-free formulation). SM5S22AHE3_A/K remains fully supported for existing designs and legacy BOMs.
SM5S22AHE3_A/K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- 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):
- 101A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM5S22AHE3_A/K FAQ
1.How can I place an order for SM5S22AHE3_A/K through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S22AHE3_A/K 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 SM5S22AHE3_A/K reliable?
The price and inventory of SM5S22AHE3_A/K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S22AHE3_A/K is usually 5 days.
3.What payment methods are accepted for SM5S22AHE3_A/K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S22AHE3_A/K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S22AHE3_A/K?
SM5S22AHE3_A/K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S22AHE3_A/K 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 SM5S22AHE3_A/K?
For technical support, including SM5S22AHE3_A/K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S22AHE3_A/K requirements.
6.How does Aetrix verify that SM5S22AHE3_A/K is sourced from the original manufacturer or authorized distributors?
All SM5S22AHE3_A/K 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 SM5S22AHE3_A/K meets industry standards.
7.What is the process for return or replacement of SM5S22AHE3_A/K?
All SM5S22AHE3_A/K units undergo pre-shipment inspection (PSI). If there is an issue with SM5S22AHE3_A/K, 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 SM5S22AHE3_A/K part is unused and in its original packaging.
Return procedure for SM5S22AHE3_A/K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S22AHE3_A/K Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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