My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM8S26-E3/2D
- Part No.:
- SM8S26-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S26-E3/2D.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,154
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM8S26-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 12 V/24 V systems. It features a 26.0 V stand-off voltage (VWM), 46.6 V maximum clamping voltage (VC) at 142 A peak pulse current (IPPM), and 6600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C.
For engineers reviewing the SM8S26-E3/2D datasheet, SM8S26-E3/2D pinout, SM8S26-E3/2D application, or SM8S26-E3/2D equivalent, key selection criteria include its AEC-Q101 qualification, DO-218AB package thermal performance (RθJC = 0.90 °C/W), low leakage (<10 μA at VWM), and ISO7637-2 compliance for automotive transients.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability under high-temperature stress. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to metal chassis for efficient thermal dissipation in engine bay environments.
The device delivers 6600 W surge capability with 10/1000 μs waveform and sustains 5200 W with 10/10 000 μs waveform-critical for extended load dump events. Its 175 °C junction rating and MSL Level 1 qualification support reflow compatibility and long-term reliability in automotive power electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Reverse stand-off voltage; defines maximum continuous operating voltage before clamping begins |
| VC @ IPPM | 46.6 V - Clamping voltage at 142 A; limits downstream voltage stress during 10/1000 μs transients |
| IPPM (10/1000 μs) | 142 A - Peak pulse current handling; supports robust protection against ISO7637-2 Pulse 5a/b load dump |
| TJ max. | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; allows precise thermal design when mounted on heatsink |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors (HTOL, TC, HTRB, etc.) |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; compatible with standard 245 °C peak reflow profile |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads; UL 94 V-0 molding compound; 2.605 g unit weight; designed for mechanical robustness and thermal transfer via metal heatsink contact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected circuit ground or low-side return path; requires PCB copper pour for thermal conduction |
| Lead 2 / Metal Heatsink | Cathode | Primary heat-dissipating surface; must be soldered directly to large copper area or external heatsink for RθJC = 0.90 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature junction rating | 175 °C operation enables placement near engines, alternators, and power modules without derating |
| Low reverse leakage | <10 μA at VWM = 26 V reduces standby power loss in always-on automotive modules |
| ISO7637-2 compliance | Validated for Pulse 5a/b load dump waveforms ensures system-level EMC robustness in 12 V/24 V vehicles |
| Passivated anisotropic rectifier | Stable breakdown characteristics over lifetime and temperature; eliminates parametric drift in harsh environments |
| DO-218AB mechanical robustness | UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance ensure long-term field reliability |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle electrical systems during alternator load dump events (ISO7637-2 Pulse 5). IC Role / Device Role / Timing Role: Primary transient suppression device placed at battery input of power distribution modules and body control units. Use Value: Limits clamped voltage to 46.6 V at 142 A, preventing damage to downstream DC/DC converters and microcontrollers rated ≤ 48 V. |
Use Scenario: Safeguarding ECU power rails against inductive switching transients from fuel injectors, solenoids, and relays. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed adjacent to ECU input filter capacitors. Use Value: Sub-1 ns response time and 0.90 °C/W thermal resistance maintain safe junction temperature during repeated 100 A surges. |
| Commercial Vehicle Power Management | Start-Stop System Battery Interface |
Use Scenario: Securing power inputs of telematics gateways and ADAS domain controllers in trucks and buses. IC Role / Device Role / Timing Role: High-energy TVS integrated into front-end protection stage of multi-rail power supply. Use Value: 6600 W peak power rating handles extended 10/10 000 μs transients common in heavy-duty vehicle alternator regulation faults. |
Use Scenario: Protecting battery monitoring ICs and charge controllers during aggressive start-stop cycling with regenerative braking spikes. IC Role / Device Role / Timing Role: Stand-off voltage-matched TVS (VWM = 26 V) placed between LiFePO4/AGM battery and PMIC input. Use Value: 10 μA leakage at 26 V minimizes quiescent current drain while maintaining full AEC-Q101 qualification for 15+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/5BT | Lower PPPM (400 W vs. 6600 W); SMA package (RθJC ≈ 40 °C/W); bidirectional option available | Not suitable for load dump; limited to low-energy ESD/surge (IEC61000-4-2/4-4) | Select only for non-automotive, low-power signal-line protection where space constraints prohibit DO-218AB |
| TPSMD26A | Same DO-218AB package; lower IPPM (120 A); higher VC (48.4 V); not AEC-Q101 qualified | Lacks automotive qualification and ISO7637-2 validation; intended for industrial/commercial use only | Acceptable for cost-sensitive non-automotive 24 V systems where AEC-Q101 is not mandated |
Compared with SMAJ26A-E3/5BT and TPSMD26A, the SM8S26-E3/2D provides 16.5× higher surge power, certified automotive qualification, and thermal performance enabling direct heatsink mounting-making it the only viable choice for OEM-grade load dump protection.
Availability
SM8S26-E3/2D is available at Aetrix Electronics and suitable for automotive power distribution, engine control units, and commercial vehicle telematics requiring stable component supply across extended production lifecycles.
Supply support for SM8S26-E3/2D 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 SM8Sxx family was engineered specifically for automotive load dump and ISO7637-2 transient suppression, emphasizing high-temperature stability, AEC-Q101 compliance, and DO-218AB thermal efficiency.
FAQ
What is the clamping voltage of the SM8S26-E3/2D at its rated peak pulse current?
The SM8S26-E3/2D has a maximum clamping voltage (VC) of 46.6 V when subjected to its specified peak pulse current of 142 A using a 10/1000 μs waveform. This value is measured per the conditions defined in Vishay document 88387 and ensures downstream components see no more than 46.6 V during worst-case transients. The SM8S26-E3/2D maintains this clamping performance across its full operating temperature range.
Is the SM8S26-E3/2D qualified for automotive applications?
Yes, the SM8S26-E3/2D is AEC-Q101 qualified and explicitly validated for automotive use, including ISO7637-2 load dump compliance. Its 175 °C junction rating, MSL Level 1 reflow compatibility, and JESD201 Class 2 whisker resistance meet stringent automotive reliability requirements. The SM8S26-E3/2D is approved for deployment in ECUs, power distribution modules, and telematics systems.
What package does the SM8S26-E3/2D use, and how is it mounted?
The SM8S26-E3/2D uses the DO-218AB surface-mount package, featuring a metal heatsink terminal (cathode) and lead 1 (anode). Mounting requires soldering the metal heatsink to a large copper area or external heatsink to achieve the specified RθJC = 0.90 °C/W. The SM8S26-E3/2D's anode-heatsink polarity must be observed during PCB layout to ensure correct circuit integration.
Does the SM8S26-E3/2D meet RoHS and halogen-free requirements?
Yes, the SM8S26-E3/2D is RoHS-compliant per Directive 2011/65/EU and halogen-free per JEDEC JS709A standards. The "HE3" suffix confirms compliance with both requirements, and the device carries no restricted substances above threshold limits. This makes the SM8S26-E3/2D suitable for environmentally regulated automotive and industrial applications.
How does the SM8S26-E3/2D compare to the SM8S26A variant?
The SM8S26-E3/2D is the standard unidirectional version with VBR min/max = 28.9 V/35.3 V, while the SM8S26A offers tighter breakdown tolerance (28.9 V/31.9 V) and lower clamping voltage (42.1 V). Both share identical package, thermal specs, and AEC-Q101 qualification. The SM8S26-E3/2D is selected when broader VBR tolerance is acceptable and cost optimization is prioritized over minimal clamping margin.
SM8S26-E3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 142A
- Power - Peak Pulse:
- 6600W (6.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM8S26-E3/2D FAQ
1.How can I place an order for SM8S26-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S26-E3/2D 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 SM8S26-E3/2D reliable?
The price and inventory of SM8S26-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S26-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S26-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S26-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S26-E3/2D?
SM8S26-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S26-E3/2D 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 SM8S26-E3/2D?
For technical support, including SM8S26-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S26-E3/2D requirements.
6.How does Aetrix verify that SM8S26-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S26-E3/2D 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 SM8S26-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S26-E3/2D?
All SM8S26-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S26-E3/2D, 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 SM8S26-E3/2D part is unused and in its original packaging.
Return procedure for SM8S26-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S26-E3/2D Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
