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Vishay General Semiconductor - Diodes Division SMAJ26CHE3/5A
- Part No.:
- SMAJ26CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CHE3/5A.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,245
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Product details
Overview
SMAJ26CHE3/5A from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified bi-directional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features a 26 V stand-off voltage (VWM), 46.6 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - optimized for protecting MOSFETs, sensor signal lines, and microcontroller I/O against ESD and load-switching transients.
For engineers reviewing the SMAJ26CHE3/5A datasheet, SMAJ26CHE3/5A pinout, SMAJ26CHE3/5A application, or SMAJ26CHE3/5A equivalent, this device is selected for robust surge immunity in automotive body electronics, industrial PLC I/O modules, and telecom power rail protection where AEC-Q101 qualification, low leakage (<1 µA at VWM), and stable clamping under repetitive surges are critical.
Technical Context
The SMAJ26CHE3/5A operates as a bi-directional avalanche diode, exhibiting symmetrical breakdown behavior in both polarities with a minimum breakdown voltage (VBR) of 28.9 V and maximum of 35.3 V at 1 mA test current. Its junction capacitance is not specified in the datasheet, but typical values for SMAJ-series bi-directional parts at 1 MHz and VWM are below 200 pF - suitable for signal-line protection without compromising data integrity.
Thermally, it delivers RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C. The HE3 suffix confirms high-reliability automotive grade compliance, including JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 24 V automotive systems. |
| VC (Clamping Voltage) | 46.6 V at 8.6 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; ensures downstream ICs rated ≥50 V remain unharmed. |
| IPPM (Peak Pulse Current) | 8.6 A - Maximum non-repetitive surge current the device can safely shunt without degradation; validated per Fig. 3 waveform. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capability for 10/1000 µs transients; derates to 300 W above 78 V, but SMAJ26CHE3/5A maintains full rating. |
| TJ Range | –55 °C to +150 °C - Full operational temperature range compatible with under-hood automotive environments and industrial enclosures. |
| Leakage Current (ID) | <1 µA at 26 V - Negligible standby power loss and minimal interference on high-impedance sensor inputs. |
| AEC-Q101 Qualified | Yes - Validated for automotive reliability including HTOL, TC, UHAST, and ESD testing; required for body control modules and ADAS subsystems. |
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 serves as input/output; no cathode band - enables placement flexibility and eliminates orientation errors in automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and ESD robustness - reduces qualification burden for Tier 1 suppliers. |
| 400 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/3a transients and IEC 61000-4-5 surges without failure - supports design compliance with automotive EMC standards. |
| Low incremental surge resistance | Enables tight clamping with minimal voltage overshoot during fast-rising transients - improves protection margin for sensitive 3.3 V/5 V logic interfaces. |
| MSL Level 1, 260 °C reflow compatible | Withstands lead-free soldering profiles without delamination or parameter shift - simplifies manufacturing integration in high-volume SMT lines. |
| Glass passivated junction | Provides stable electrical characteristics and long-term reliability under thermal stress and humidity exposure - critical for 15+ year automotive service life. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects 24 V supply rails and CAN/LIN bus signal lines from load-dump and inductive switching transients in door module ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector interface to clamp ±100 V transients within 1 ns response time. Use Value: Prevents latch-up or permanent damage to MCU GPIOs and transceiver ICs while maintaining signal integrity across 500 kbps CAN FD links. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Primary front-end surge suppression element before optocoupler or Schmitt-trigger input stage. Use Value: Ensures >100,000 surge cycles without parameter drift, eliminating false triggering and unplanned downtime in mission-critical processes. |
| Telecom Power Supply Input | Automotive Sensor Signal Conditioning |
Use Scenario: Guards AC/DC adapter secondary-side 24 V output against lightning-induced surges entering via Ethernet or PoE ports. IC Role / Device Role / Timing Role: Secondary-stage TVS parallel to bulk capacitor to absorb residual energy after primary MOV clamping. Use Value: Limits voltage excursion to ≤47 V during 10/1000 µs 1 kV surges, preserving DC-DC converter ICs and downstream PMICs. |
Use Scenario: Protects analog outputs of pressure/temperature sensors connected to vehicle battery-supplied harnesses. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp on 0–5 V ratiometric output lines exposed to engine bay noise. Use Value: Maintains <1 µA leakage at 26 V to avoid loading sensor bridge circuits, ensuring <0.1% measurement error over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3/5A | Uni-directional variant; cathode-banded; VBR min/max tighter (28.9 V / 31.9 V); same VC = 42.1 V at 9.5 A. | Requires correct polarity alignment; suited for DC rails with defined ground reference, e.g., 24 V supply to MCU VCC. | Select when unidirectional clamping suffices and layout allows orientation-aware placement. |
| SMCJ26CAHE3/5A | DO-214AB (SMC) package; higher PPPM = 1500 W; same VWM/VC; larger footprint (7.11 mm × 6.22 mm vs. SMA's 4.5 mm × 2.79 mm). | Used where higher surge energy (e.g., ISO 16750-2 long-duration pulses) demands greater power dissipation. | Choose only if PCB space permits and system-level surge testing exceeds 400 W requirements. |
Compared with SMAJ26CHE3/5A, the uni-directional SMAJ26AHE3/5A offers slightly lower clamping but requires polarity-aware routing, while the SMCJ26CAHE3/5A provides 3.75× higher surge power at the cost of 2.5× board area - making SMAJ26CHE3/5A the optimal balance of AEC-Q101 compliance, compactness, and 400 W protection for space-constrained automotive and industrial nodes.
Availability
SMAJ26CHE3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power rail stabilization requiring stable component supply across extended product lifecycles.
Supply support for SMAJ26CHE3/5A 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 SMAJ series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment electronics, emphasizing stable clamping, low leakage, and reflow-ready packaging for next-generation vehicle ECUs and smart infrastructure systems.
FAQ
What is the clamping voltage of SMAJ26CHE3/5A at its rated peak pulse current?
The SMAJ26CHE3/5A has a maximum clamping voltage (VC) of 46.6 V at 8.6 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per Figure 1 and Table 1 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ26CHE3/5A maintains this clamping performance across its full operating temperature range.
Is SMAJ26CHE3/5A suitable for automotive applications?
Yes, SMAJ26CHE3/5A is explicitly qualified to AEC-Q101 standards and carries the HE3 suffix denoting high-reliability automotive grade. It passes stress tests including high-temperature operating life, temperature cycling, and unbiased HAST - making it approved for use in body control modules, sensor interfaces, and infotainment power supplies. The SMAJ26CHE3/5A meets all requirements for under-hood and cabin-mounted automotive electronics.
What does the "HE3" suffix mean in SMAJ26CHE3/5A?
The "HE3" suffix in SMAJ26CHE3/5A indicates RoHS-compliant, high-reliability/automotive-grade construction. It signifies AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and enhanced process controls versus commercial-grade "E3" variants. The SMAJ26CHE3/5A is built to withstand automotive thermal, mechanical, and chemical stresses over 15+ years - distinguishing it from standard industrial TVS diodes.
How does SMAJ26CHE3/5A differ from SMAJ26AHE3/5A?
SMAJ26CHE3/5A is bi-directional with no polarity marking, while SMAJ26AHE3/5A is uni-directional and marked with a cathode band. Their clamping voltages differ: SMAJ26CHE3/5A clamps at 46.6 V (8.6 A), whereas SMAJ26AHE3/5A clamps at 42.1 V (9.5 A). Both share identical VWM = 26 V and AEC-Q101 qualification, but SMAJ26CHE3/5A is preferred for AC-coupled or polarity-agnostic protection points like CAN bus lines.
What is the maximum operating temperature for SMAJ26CHE3/5A?
The SMAJ26CHE3/5A has a maximum junction temperature (TJ) rating of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. This specification is confirmed in the "Maximum Ratings" table of Vishay document 88390 and enables deployment in engine bay, transmission control, and industrial motor drive environments where ambient temperatures exceed 125 °C. The SMAJ26CHE3/5A sustains full electrical performance across this entire range.
SMAJ26CHE3/5A 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)
SMAJ26CHE3/5A FAQ
1.How can I place an order for SMAJ26CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CHE3/5A 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 SMAJ26CHE3/5A reliable?
The price and inventory of SMAJ26CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ26CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CHE3/5A?
SMAJ26CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CHE3/5A 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 SMAJ26CHE3/5A?
For technical support, including SMAJ26CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CHE3/5A requirements.
6.How does Aetrix verify that SMAJ26CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ26CHE3/5A 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 SMAJ26CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ26CHE3/5A?
All SMAJ26CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CHE3/5A, 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 SMAJ26CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ26CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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