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Vishay General Semiconductor - Diodes Division SM5S22-001HE3_A/I
- Part No.:
- SM5S22-001HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S22-001HE3_A/I.pdf
- Description:
- TVS DIODE DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
SM5S22-001HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in DO-218AB package, rated for 22 V stand-off voltage (VWM), 25.7 V nominal breakdown (VBR), 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection. It operates up to TJ = 175 °C with low leakage (<10 μA at VWM) and clamps transients to ≤35.5 V at 101 A.
For engineers reviewing the SM5S22-001HE3_A/I datasheet, SM5S22-001HE3_A/I pinout, SM5S22-001HE3_A/I application, or SM5S22-001HE3_A/I equivalent, key selection criteria include unidirectional polarity, 3600 W surge rating, DO-218AB thermal performance (RθJM = 0.45 °C/W), AEC-Q101 qualification, and compliance with ISO7637-2 load dump waveforms.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its junction design enables reliable operation at TJ = 175 °C and meets MSL Level 1 per J-STD-020 with 245 °C reflow peak.
The device features a metal heatsink as anode terminal, enabling efficient thermal conduction to PCB copper. Its clamping behavior is characterized under standardized 10/1000 μs and 10/10 000 μs waveforms, with verified performance across -55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse working voltage before clamping begins; defines system operating margin. |
| VBR (nom) | 25.7 V - Breakdown voltage at 5 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 35.5 V - Clamping voltage at 101 A peak pulse; limits downstream IC stress during load dump events. |
| PPPM (10/1000 μs) | 3600 W - Peak pulse power handling; supports high-energy automotive transients without failure. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot engine-control electronics. |
| RθJM | 0.45 °C/W - Junction-to-mount thermal resistance; confirms effective heat transfer to PCB heatsink pad. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct orientation in series with protected line. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with integral metal heatsink acting as anode terminal; meets UL 94 V-0, RoHS-compliant, and JESD 201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current sink | Connected to protected line; carries full surge current into heatsink/anode during clamping. |
| Lead 2 / Metal Heatsink (anode) | Common reference & thermal path | Serves as both circuit return and primary thermal interface to PCB copper; must be soldered to large copper area. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive underhood applications including temperature cycling, humidity, and mechanical shock. |
| Junction passivation | Reduces surface leakage and improves long-term stability at 175 °C junction temperature. |
| ISO7637-2 compliance | Meets Pulse 5a/b load dump requirements when mounted per recommended footprint and thermal layout. |
| MSL Level 1 rating | Enables single-pass reflow at 245 °C peak without moisture-induced damage. |
| Low VF at high IF | ≤2.0 V forward voltage at 100 A pulse (300 μs); minimizes conduction loss during bidirectional fault conditions. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Power Line |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control units against alternator load dump surges up to 35 V and 100+ A. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤35.5 V, preventing overvoltage damage to downstream LDOs and microcontrollers while sustaining 3600 W surge energy. |
Use Scenario: Shields 12 V power feeding isolated CAN transceivers in body control modules from ignition-induced spikes. IC Role / Device Role / Timing Role: Standoff-clamp protector on VCC line upstream of CAN bus power regulator. Use Value: Maintains <10 μA leakage at 22 V to avoid quiescent current penalty, while clamping fast transients within ISO7637-2 Pulse 1/2a limits. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Supply | Electric Power Steering (EPS) Motor Driver Board |
Use Scenario: Safeguards 12 V input to image sensor power management ICs in rear-view or surround-view cameras exposed to vehicle battery fluctuations. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main camera module power rail. Use Value: Delivers 175 °C operation capability to survive under-hood ambient temperatures, with RθJM = 0.45 °C/W ensuring stable junction temp during repeated surges. |
Use Scenario: Protects H-bridge gate driver supplies in EPS systems subjected to motor regeneration spikes and load dump. IC Role / Device Role / Timing Role: High-power TVS on 12 V auxiliary rail feeding motor control logic and sensors. Use Value: Handles 500 A IFSM non-repetitive surge and sustains 2800 W (10/10 000 μs) for extended load dump events without degradation. |
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 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free, matte tin termination, and AEC-Q101 qualification - identical electrical and thermal performance. | No functional difference; HM3 replaces HE3 in new designs per Vishay's "Not For New Designs" notice. | Select SM5S22AHM3 for new automotive designs requiring latest material compliance and long-term supply assurance. |
| SMAJ22A | Lower PPPM (400 W vs. 3600 W), SMA package (RθJA ≈ 65 °C/W vs. DO-218AB's 0.45 °C/W RθJM), no AEC-Q101 qualification. | Suitable only for low-energy industrial or consumer transients; not rated for automotive load dump or 175 °C operation. | Use SMAJ22A only in cost-sensitive, non-automotive applications where surge energy is <500 W and ambient <125 °C. |
Compared with SM5S22-001HE3_A/I, SM5S22AHM3 offers identical protection performance with updated environmental compliance, while SMAJ22A provides significantly lower surge capacity and thermal robustness - making it unsuitable for AEC-Q101 or high-energy automotive use cases.
Availability
SM5S22-001HE3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, ADAS camera power conditioning, and electric power steering systems requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for SM5S22-001HE3_A/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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM5SxxA family delivers high-power transient suppression in thermally optimized DO-218AB packages, engineered specifically for automotive load dump and ISO7637-2 compliance in under-hood environments.
FAQ
What is the maximum clamping voltage of the SM5S22-001HE3_A/I at its rated peak pulse current?
The SM5S22-001HE3_A/I clamps to a maximum of 35.5 V at its specified peak pulse current of 101 A under the 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number 88382, page 2) and defines the upper voltage limit imposed on protected circuits during worst-case transients.
Is the SM5S22-001HE3_A/I qualified for automotive applications?
Yes, the SM5S22-001HE3_A/I is AEC-Q101 qualified and explicitly designed for automotive use, including under-hood engine control units and body electronics. Its 175 °C junction rating, ISO7637-2 compliance, and MSL Level 1 reflow capability confirm suitability for production automotive systems.
What does the "HE3_A/I" suffix mean in SM5S22-001HE3_A/I?
The "HE3" suffix denotes RoHS-compliant, halogen-free construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance; "A" indicates ±5 % VBR tolerance and unidirectional polarity; "I" specifies the preferred packaging code for 13″ tape-and-reel delivery with anode oriented toward sprocket holes.
Can the SM5S22-001HE3_A/I replace the SM5S22A in existing designs?
Yes - SM5S22-001HE3_A/I is a direct replacement for SM5S22A, sharing identical electrical specifications, DO-218AB package dimensions, pinout, and thermal characteristics. The "-001" denotes a specific manufacturing lot or revision variant fully aligned with the base SM5S22A specification.
What is the thermal resistance from junction to mount (RθJM) for the SM5S22-001HE3_A/I?
The SM5S22-001HE3_A/I has a typical RθJM of 0.45 °C/W, measured per JEDEC 51-14 using the Transient Dual Interface Method. This low value reflects the DO-218AB package's metal heatsink anode, which must be soldered to a large PCB copper area to achieve rated thermal performance.
SM5S22-001HE3_A/I 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:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 91A
- 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
SM5S22-001HE3_A/I FAQ
1.How can I place an order for SM5S22-001HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S22-001HE3_A/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 SM5S22-001HE3_A/I reliable?
The price and inventory of SM5S22-001HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S22-001HE3_A/I is usually 5 days.
3.What payment methods are accepted for SM5S22-001HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S22-001HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S22-001HE3_A/I?
SM5S22-001HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S22-001HE3_A/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 SM5S22-001HE3_A/I?
For technical support, including SM5S22-001HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S22-001HE3_A/I requirements.
6.How does Aetrix verify that SM5S22-001HE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM5S22-001HE3_A/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 SM5S22-001HE3_A/I meets industry standards.
7.What is the process for return or replacement of SM5S22-001HE3_A/I?
All SM5S22-001HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S22-001HE3_A/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 SM5S22-001HE3_A/I part is unused and in its original packaging.
Return procedure for SM5S22-001HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S22-001HE3_A/I Tags
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