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Vishay General Semiconductor - Diodes Division SMAJ26CAHE3_A/I
- Part No.:
- SMAJ26CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CAHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
SMAJ26CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V maximum clamping voltage (VC) at 9.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ26CAHE3_A/I datasheet, SMAJ26CAHE3_A/I pinout, SMAJ26CAHE3_A/I application, or SMAJ26CAHE3_A/I equivalent, this AEC-Q101 qualified, RoHS-compliant bidirectional TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and load-switching transient suppression in harsh environments.
Technical Context
This device operates as a voltage-clamping protector: when reverse voltage exceeds VWM = 26 V, it avalanches to limit transient energy, delivering 42.1 V clamping at 9.5 A IPPM under 10/1000 μs waveform. Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
Thermally, it sustains operation up to TJ = 150 °C with RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and handles 40 A non-repetitive forward surge (IFSM). The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 42.1 V at 9.5 A - Measured clamping voltage under standardized 10/1000 μs surge; directly limits downstream IC stress. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; supports repetitive transients up to 0.01% duty cycle. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); validates robustness against inductive switch-off events. |
| TJ max. | 150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial ambient conditions. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with standard SMT pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC) - molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (peak reflow 260 °C), no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during positive transient | One end of symmetrical PN junction; conducts during +ve surges relative to cathode side in unidirectional mode - but undefined polarity in bidirectional SMAJ26CAHE3_A/I. |
| Cathode | Current exit terminal during negative transient | Other end of symmetrical junction; conducts during −ve surges - functionally interchangeable with anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| 400 W peak pulse power (10/1000 μs) | Clamps high-energy transients such as ISO 7637-2 Pulse 1/2a without failure - protects MOSFET gates and microcontroller I/Os. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during clamping - reduces risk of latch-up or oxide breakdown in protected ICs. |
| MSL Level 1 rating | Enables direct placement into high-temperature reflow profiles without pre-baking - simplifies manufacturing for high-volume automotive PCBs. |
| Glass-passivated junction | Ensures stable leakage (<1 μA at VWM) and long-term parameter stability under thermal/humidity stress. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed at power input stage, upstream of LDOs and DC-DC converters. Use Value: Limits transients to ≤42.1 V during 100 V/400 ms load dump events, preventing brownout resets and permanent damage to 3.3 V/5 V logic. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors from ESD and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal and return paths, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity by clamping fast transients within 1 ns response time while adding <1 pF capacitance - no bandwidth degradation. |
| Consumer USB Port Surge Suppression | Telecom DSL Line Interface Protection |
Use Scenario: Safeguarding USB 2.0 data lines (D+/D−) and VBUS in portable docking stations against hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector, referenced to ground. Use Value: Clamps ±15 kV air discharge to <20 V peak with sub-nanosecond response - preserves signal eye diagram and prevents PHY latch-up. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers and receivers exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary surge limiter in hybrid coupler interface, coordinated with gas discharge tube (GDT) secondary protection. Use Value: Absorbs 10/700 μs telecom surges up to 1.2 kV with 400 W capability - extends GDT lifetime and avoids false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-E3/61 | Same electrical specs and SMA package; commercial-grade (non-AEC-Q101), RoHS-compliant, supplied in 7" tape/reel (1800 pcs). | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules. | Select when cost-sensitive industrial or consumer designs do not require AEC-Q101 validation. |
| SMAJ26CAHM3_A/I | Identical AEC-Q101 qualification and packaging; halogen-free molding compound (per IEC 61249-2-21), same 13" tape/reel (7500 pcs). | Meets stricter environmental mandates (e.g., EU automotive OEM green procurement policies). | Choose for programs requiring halogen-free compliance without sacrificing reliability or form factor. |
Compared with SMAJ26CAHE3_A/I, the E3 variant trades automotive qualification for lower cost in non-automotive settings, while the HM3 variant adds halogen-free construction for eco-sensitive deployments - all three share identical clamping behavior, package footprint, and thermal performance.
Availability
SMAJ26CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom line card designs requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMAJ26CAHE3_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 reliability, efficiency, and application-specific optimization.
The SMAJ series was engineered specifically for high-energy transient suppression in automotive, industrial, and communications systems - balancing low clamping voltage, fast response, and rugged surface-mount packaging.
FAQ
What is the clamping voltage of SMAJ26CAHE3_A/I at its rated peak pulse current?
The SMAJ26CAHE3_A/I has a maximum clamping voltage (VC) of 42.1 V at 9.5 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88390, Rev. 09-Jan-2024), ensuring predictable overvoltage limiting for downstream circuitry. The SMAJ26CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMAJ26CAHE3_A/I suitable for automotive applications?
Yes, SMAJ26CAHE3_A/I is AEC-Q101 qualified, making it suitable for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. Its qualification covers stress tests such as high-temperature reverse bias, temperature cycling, and ESD immunity. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction - a key differentiator from commercial-grade variants like SMAJ26CA-E3/61.
What does the "CA" suffix indicate in SMAJ26CAHE3_A/I?
The "CA" suffix in SMAJ26CAHE3_A/I designates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" types (e.g., SMAJ26A), SMAJ26CAHE3_A/I has no cathode marking and functions identically in either polarity, ideal for AC signal lines, differential buses, or floating power domains where polarity cannot be guaranteed.
What is the maximum operating temperature for SMAJ26CAHE3_A/I?
The SMAJ26CAHE3_A/I has a maximum junction temperature (TJ) of +150 °C and an operating/storage temperature range of −55 °C to +150 °C. This rating enables reliable deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Thermal derating curves in the datasheet confirm sustained operation at full power up to 125 °C ambient when mounted on recommended copper pad layouts.
How does SMAJ26CAHE3_A/I differ from SMAJ26AHE3_A/I?
SMAJ26CAHE3_A/I is bidirectional, while SMAJ26AHE3_A/I is unidirectional - resulting in distinct circuit roles. The "CA" version clamps transients equally in both directions with no polarity marking; the "A" version requires correct orientation (cathode band toward higher potential) and only clamps reverse surges. Their VWM, VBR, and VC values are closely matched, but the SMAJ26CAHE3_A/I eliminates layout polarity constraints in AC-coupled or differential applications.
SMAJ26CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 9.5A
- 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)
SMAJ26CAHE3_A/I FAQ
1.How can I place an order for SMAJ26CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CAHE3_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 SMAJ26CAHE3_A/I reliable?
The price and inventory of SMAJ26CAHE3_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 SMAJ26CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ26CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CAHE3_A/I?
SMAJ26CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CAHE3_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 SMAJ26CAHE3_A/I?
For technical support, including SMAJ26CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ26CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ26CAHE3_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 SMAJ26CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ26CAHE3_A/I?
All SMAJ26CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CAHE3_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 SMAJ26CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ26CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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