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Vishay General Semiconductor - Diodes Division SM5S26AHE3_A/I
- Part No.:
- SM5S26AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S26AHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
SM5S26AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 26 V stand-off voltage (VWM), 30.4 V nominal breakdown voltage (VBR), 86 V maximum clamping voltage at 150 A peak pulse current, 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for under-hood automotive applications.
For engineers reviewing the SM5S26AHE3_A/I datasheet, SM5S26AHE3_A/I pinout, SM5S26AHE3_A/I application, or SM5S26AHE3_A/I equivalent, key selection criteria include clamping performance under ISO 7637-2 load dump transients, TJ = 175 °C operation, DO-218AB package thermal resistance (RθJM = 0.45 °C/W), and unidirectional polarity with heatsink-as-anode configuration.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its junction design supports 175 °C continuous operation and meets MSL Level 1 per J-STD-020 with 245 °C reflow peak.
The device delivers 3600 W surge capability using a 10/1000 μs waveform and maintains clamping voltage ≤ 86 V at 150 A IPPM. It is qualified to AEC-Q101 and rated for automotive load dump protection per ISO 7637-2 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines system working voltage margin. |
| VBR (nom) | 30.4 V - Breakdown voltage at 5 mA test current; triggers clamping during overvoltage events. |
| VC @ IPPM | 86 V - Clamping voltage at 150 A peak pulse current; limits downstream voltage stress during transients. |
| PPPM (10/1000 μs) | 3600 W - Peak pulse power handling capacity; sustains high-energy automotive load dump surges. |
| TJ max | 175 °C - Maximum junction temperature; enables placement near hot engine compartments. |
| RθJM | 0.45 °C/W - Junction-to-mount thermal resistance; supports efficient heat transfer to PCB copper or heatsink. |
| Polarity | Unidirectional - Anode connected to heatsink; blocks reverse voltage until breakdown threshold is exceeded. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with matte tin-plated leads, UL 94 V-0 rating, and AEC-Q101 qualification. Heatsink tab serves as anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive surge return path | Primary thermal and electrical connection point; must be soldered to large copper area for thermal management. |
| Cathode (Lead 1) | Transient voltage sensing and clamping node | Connected to protected line (e.g., 12 V battery rail); conducts during overvoltage to shunt energy to ground/anode. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Reduces surface leakage and improves long-term reliability in humid/high-T environments. |
| TJ = 175 °C operation | Enables direct mounting in under-hood locations without derating for ambient temperature. |
| MSL Level 1 compliance | Allows single-reflow assembly without moisture sensitivity concerns (peak 245 °C). |
| ISO 7637-2 compliance | Validated for automotive load dump immunity testing per industry-standard surge waveform. |
| Low VF (≤2.0 V @ 100 A) | Minimizes forward conduction loss during high-current surge events, reducing self-heating. |
Applications
| Automotive Battery Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protects 12 V battery-fed circuits against load dump transients up to 35 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes on main power rail before they reach downstream regulators and microcontrollers. Use Value: Limits clamped voltage to ≤86 V while absorbing 3600 W surge energy, preventing latch-up or damage to 36 V-rated components. |
Use Scenario: Shields ECU power inputs from alternator-induced surges during ignition cycling and load switching. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at board-level input filter stage to reduce stress on DC/DC converters and CAN transceivers. Use Value: Maintains <10 μA leakage at 26 V, preserving low-power sleep mode integrity while delivering 150 A surge current capability. |
| Body Control Module (BCM) Power Supply | Advanced Driver Assistance Systems (ADAS) Camera Power Line |
Use Scenario: Guards BCM 12 V supply against inductive kickback from relays, motors, and solenoids. IC Role / Device Role / Timing Role: Primary overvoltage clamp on fused power distribution node feeding multiple subsystems. Use Value: Achieves 0.45 °C/W junction-to-mount thermal resistance, enabling reliable operation without external heatsinks. |
Use Scenario: Safeguards ADAS camera module power input from transients induced by nearby high-current actuators. IC Role / Device Role / Timing Role: Final-stage TVS on camera power rail, positioned after bulk capacitance to suppress residual ringing and overshoot. Use Value: AEC-Q101 qualification ensures functional safety compliance; 175 °C rating supports compact placement near image sensor ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S26AHM3 | Same VWM/VBR/VC specs; HM3 suffix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified variant with identical DO-218AB package. | No functional difference; intended as direct replacement for HE3-series in new designs where halogen-free materials are mandated. | Select SM5S26AHM3 for new designs requiring halogen-free compliance; SM5S26AHE3_A/I remains valid for legacy builds with existing HE3 sourcing. |
| SMAJ26A | Lower PPPM (400 W vs. 3600 W); SMA package (DO-214AC) with higher RθJA (60 °C/W vs. 0.45 °C/W); no AEC-Q101 qualification. | Suitable only for low-energy industrial or consumer applications-not automotive load dump. | Use SMAJ26A only in non-automotive, lower-surge environments; avoid where ISO 7637-2 or 175 °C operation is required. |
Compared with SM5S26AHE3_A/I, SM5S26AHM3 offers identical electrical and thermal performance with updated material compliance, while SMAJ26A provides basic TVS functionality at significantly reduced surge capacity and temperature capability-making it unsuitable for automotive under-hood deployment.
Availability
SM5S26AHE3_A/I is available at Aetrix Electronics and suitable for automotive battery rail protection, engine control unit (ECU) input protection, and body control module (BCM) power supply applications requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SM5S26AHE3_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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on automotive, industrial, and computing applications.
The SM5SxxA family is engineered specifically for high-energy automotive transient suppression, targeting load dump and inductive switching protection in AEC-Q101-compliant systems operating up to 175 °C junction temperature.
FAQ
What is the clamping voltage of SM5S26AHE3_A/I at its rated peak pulse current?
The SM5S26AHE3_A/I has a maximum clamping voltage (VC) of 86 V at 150 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per standard test conditions and ensures downstream components see limited overvoltage stress during ISO 7637-2 load dump events. The SM5S26AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SM5S26AHE3_A/I qualified for automotive applications?
Yes, SM5S26AHE3_A/I is AEC-Q101 qualified and rated for TJ = -55 °C to +175 °C operation. It meets ISO 7637-2 surge requirements for automotive load dump protection and is packaged in DO-218AB with MSL Level 1 reflow compatibility. The SM5S26AHE3_A/I is explicitly designated for under-hood and powertrain-related applications requiring high-reliability transient suppression.
What does the "HE3_A/I" suffix mean in SM5S26AHE3_A/I?
The "HE3" suffix denotes RoHS-compliant, halogen-free construction with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards; "A" indicates ±5 % VBR tolerance and unidirectional polarity; "I" specifies the preferred packaging code (750-piece 13″ tape-and-reel, anode toward sprocket hole). The full designation SM5S26AHE3_A/I uniquely identifies this qualified automotive-grade variant.
How does SM5S26AHE3_A/I compare to standard SMAJ series TVS diodes?
SM5S26AHE3_A/I delivers 3600 W peak pulse power (10/1000 μs), nine times higher than SMAJ26A's 400 W rating, and uses DO-218AB packaging with 0.45 °C/W junction-to-mount thermal resistance versus SMAJ26A's DO-214AC package and 60 °C/W RθJA. The SM5S26AHE3_A/I is AEC-Q101 qualified and rated for 175 °C operation-capabilities absent in the SMAJ series. These differences make SM5S26AHE3_A/I suitable for demanding automotive load dump, unlike SMAJ26A.
Can SM5S26AHE3_A/I be used in bidirectional configurations?
No, SM5S26AHE3_A/I is unidirectional only, with the heatsink tab serving as the anode. It blocks reverse voltage up to 26 V and clamps positive transients on the cathode side. For bidirectional protection, a separate device such as SMBJ26CA or paired unidirectional units would be required. The SM5S26AHE3_A/I datasheet explicitly states "Available in unidirectional polarity only" and defines polarity as "heatsink is anode."
SM5S26AHE3_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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 86A
- 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
SM5S26AHE3_A/I FAQ
1.How can I place an order for SM5S26AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S26AHE3_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 SM5S26AHE3_A/I reliable?
The price and inventory of SM5S26AHE3_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 SM5S26AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM5S26AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S26AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S26AHE3_A/I?
SM5S26AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S26AHE3_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 SM5S26AHE3_A/I?
For technical support, including SM5S26AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S26AHE3_A/I requirements.
6.How does Aetrix verify that SM5S26AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM5S26AHE3_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 SM5S26AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM5S26AHE3_A/I?
All SM5S26AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S26AHE3_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 SM5S26AHE3_A/I part is unused and in its original packaging.
Return procedure for SM5S26AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S26AHE3_A/I Tags
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