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Vishay General Semiconductor - Diodes Division SMAJ26CHE3/61
- Part No.:
- SMAJ26CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CHE3/61.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,831
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Product details
Overview
SMAJ26CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features a 26 V stand-off voltage (VWM), 46.6 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMAJ26CHE3/61 datasheet, SMAJ26CHE3/61 pinout, SMAJ26CHE3/61 application, or SMAJ26CHE3/61 equivalent, this device serves as a robust, RoHS-compliant surge protection solution for automotive sensor interfaces, industrial I/O lines, and telecom power rails where high-reliability transient suppression and MSL Level 1 solderability are required.
Technical Context
The SMAJ26CHE3/61 employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced surges. Its bi-directional configuration enables symmetric clamping across both polarities without polarity marking, supporting AC-coupled or floating signal paths.
Rated for 150 °C maximum junction temperature and 120 °C/W junction-to-ambient thermal resistance, it delivers stable clamping performance under repetitive surge conditions when mounted on 0.2" × 0.2" copper pads - with derating applied above 25 °C ambient per Fig. 2 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VC @ IPPM | 46.6 V - Clamped voltage at 8.6 A peak pulse current (10/1000 µs); ensures downstream ICs see <47 V during worst-case surge. |
| PPPM | 400 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing on protected lines. |
| IPPM | 8.6 A - Peak surge current supported at VC; correlates to ~1.2 kV open-circuit surge voltage into 50 Ω source impedance. |
| TJ max. | 150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments with proper PCB thermal design. |
| MSL Level | Level 1 (per J-STD-020) - No floor life limitation; supports standard reflow without baking, simplifying SMT manufacturing. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Bi-directional surge path | Either terminal may serve as anode or cathode; clamps positive and negative transients equally - no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under humidity and thermal cycling. |
| 400 W peak pulse power (≤78 V) | Provides single-event surge immunity exceeding IEC 61000-4-5 requirements for industrial and automotive subsystems. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD22-B102; compatible with lead-free reflow profiles up to 260 °C peak. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including temperature cycling, mechanical shock, and accelerated life testing per AEC specification. |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed electronic modules in automotive and industrial enclosures. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity by limiting voltage excursions to ≤46.6 V during 10/1000 µs surges, preventing latch-up or damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, positioned upstream of optocoupler or Schmitt-trigger input stages. Use Value: Withstands repeated 400 W surges without degradation, enabling >100,000 switching cycles in factory automation environments. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Guarding 24–48 V DC power inputs in base station remote radio units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line transient suppressor on primary DC input, coordinated with upstream fuses and secondary filtering. Use Value: Fast sub-nanosecond response and low clamping ratio (VC/VWM = 1.79) minimize energy delivered to downstream DC/DC converters. |
Use Scenario: ESD protection for USB 2.0 data lines (D+/D−) and VBUS in portable docking stations and hub designs. IC Role / Device Role / Timing Role: Bi-directional TVS placed adjacent to USB connector to absorb ±15 kV contact discharge per IEC 61000-4-2. Use Value: Low capacitance (~100 pF at VWM, typical per Fig. 4) preserves signal rise/fall times without degrading USB 480 Mbps eye diagram. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3/61 | Unidirectional variant; includes cathode band marking and forward voltage drop (~3.5 V at 25 A). | Required only where DC bias polarity is fixed and reverse conduction must be blocked (e.g., 24 V supply rail with ground-referenced load). | Select SMAJ26AHE3/61 only if unidirectional blocking is needed; SMAJ26CHE3/61 is preferred for AC, floating, or bidirectional signal lines. |
| SMBJ26CHE3/61 | Same VWM and VC, but higher 600 W PPPM rating and SMB (DO-214AA) package with larger thermal pad area. | Better suited for higher-energy surge environments (e.g., PoE injectors, motor drives) where 400 W is marginal. | Choose SMBJ26CHE3/61 when board space allows larger footprint and system-level surge testing exceeds IEC 61000-4-5 Level 4. |
Compared with SMAJ26AHE3/61 and SMBJ26CHE3/61, the SMAJ26CHE3/61 uniquely balances bi-directional symmetry, AEC-Q101 qualification, and compact DO-214AC packaging - making it optimal for space-constrained automotive and industrial signal line protection where polarity-agnostic clamping is essential.
Availability
SMAJ26CHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom power rail applications requiring stable component supply, AEC-Q101 compliance, and MSL Level 1 manufacturability.
Supply support for SMAJ26CHE3/61 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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMAJ series was developed specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What does the "HE3" suffix indicate in SMAJ26CHE3/61?
The HE3 suffix in SMAJ26CHE3/61 denotes high-reliability, automotive-grade qualification per AEC-Q101, RoHS compliance, and JESD201 Class 2 whisker resistance. It distinguishes this part from commercial-grade E3 variants and confirms suitability for under-hood and safety-critical vehicle systems.
Is SMAJ26CHE3/61 unidirectional or bi-directional?
SMAJ26CHE3/61 is a bi-directional TVS diode - confirmed by the "C" in its part number and absence of cathode band marking. It provides symmetrical clamping for both positive and negative transients, making it ideal for AC-coupled signals, differential buses, and floating power domains.
What is the maximum clamping voltage of SMAJ26CHE3/61 at rated surge current?
The maximum clamping voltage (VC) of SMAJ26CHE3/61 is 46.6 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per the Electrical Characteristics table on page 2 of Vishay document 88390 and defines the upper voltage limit imposed on protected circuits during surge events.
Can SMAJ26CHE3/61 be used in place of SMAJ26AHE3/61?
No - SMAJ26CHE3/61 is bi-directional while SMAJ26AHE3/61 is unidirectional. Substituting SMAJ26CHE3/61 for SMAJ26AHE3/61 may allow unintended reverse conduction in DC-biased circuits. The reverse is also invalid due to polarity marking and forward voltage characteristics unique to the "A" variant.
What PCB pad layout is recommended for optimal thermal and surge performance of SMAJ26CHE3/61?
Vishay specifies mounting SMAJ26CHE3/61 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W pulse power and thermal resistance (RθJA = 120 °C/W). Smaller pads reduce surge capability and increase junction temperature during repetitive events.
SMAJ26CHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ26CHE3/61 FAQ
1.How can I place an order for SMAJ26CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CHE3/61 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 SMAJ26CHE3/61 reliable?
The price and inventory of SMAJ26CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ26CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CHE3/61?
SMAJ26CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CHE3/61 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 SMAJ26CHE3/61?
For technical support, including SMAJ26CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CHE3/61 requirements.
6.How does Aetrix verify that SMAJ26CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ26CHE3/61 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 SMAJ26CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ26CHE3/61?
All SMAJ26CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CHE3/61, 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 SMAJ26CHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ26CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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