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Diodes Incorporated SMAJ26CA-13-F
- Part No.:
- SMAJ26CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CA-13-F.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:22,592
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Product details
Overview
SMAJ26CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 26V reverse standoff voltage (VRWM), 42.1V maximum clamping voltage at 9.5A peak pulse current, and fast response time (<1.0 ps) to ESD and surge events. Used in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the SMAJ26CA-13-F datasheet, SMAJ26CA-13-F pinout, SMAJ26CA-13-F application, or SMAJ26CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, unidirectional vs. bidirectional polarity requirements, JEDEC-standard SMA package thermal performance, and AEC-Q101 qualification status for automotive use cases.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ±8/20 µs surges and ±15 kV contact ESD per IEC 61000-4-2 without polarity-sensitive layout constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5 µA at VRWM).
The device complies with J-STD-020 moisture sensitivity level 1 and achieves 1.0W steady-state power dissipation at TL = +75°C. Thermal derating follows a linear curve above ambient, maintaining clamping integrity up to TJ = +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 8.3 ms half-sine surge without failure under defined test conditions |
| Reverse Standoff Voltage (VRWM) | 26 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Clamping Voltage (VC) | 42.1 V @ 9.5 A - Limits transient voltage seen by downstream circuitry during specified surge event |
| Breakdown Voltage (VBR) | 28.9–31.9 V @ 1.0 mA - Confirmed avalanche onset range ensuring reliable triggering margin |
| Leakage Current (IR) | <5 µA @ 26 V - Minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.29–2.92 mm body width and 4.00–4.60 mm length |
Pinout & Package
Two-terminal SMA (DO-214AC) package with cathode band omitted for bidirectional configuration. Terminals are matte tin-plated for RoHS-compliant solderability per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in either direction; no polarity marking required |
| Case | Thermal and mechanical interface | Molded plastic UL 94V-0 housing providing insulation and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables protection against IEC 61000-4-5 Level 4 (4 kV line-to-line) surges in compact footprint |
| Glass passivated die | Ensures long-term parameter stability and resistance to humidity-induced degradation |
| Bidirectional symmetry | Eliminates need for orientation-aware PCB layout and supports AC-coupled or floating signal paths |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive "Green" definitions (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Automotive Infotainment Power Rail | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting 12V supply inputs of head unit MCUs and display drivers from load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of LDO regulators and PMICs to limit voltage excursion below 45V. Use Value: Clamps 40A 8.3ms surge to ≤42.1V, preserving regulator input rating and avoiding brownout resets. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD and inductive switching noise in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional shunt protector mounted directly at connector entry point with minimal trace inductance. Use Value: Symmetric clamping maintains common-mode noise rejection while limiting differential overshoot to <±45V. |
| Telecom PoE Midspan Injector | Medical Sensor Signal Conditioning |
Use Scenario: Overvoltage protection on 48V DC power feed lines of IEEE 802.3af/at midspan PSE equipment. IC Role / Device Role / Timing Role: Secondary surge clamp after primary MOV stage, handling residual fast-rising transients. Use Value: Fast response (<1 ps) captures sub-microsecond spikes missed by slower bulk protectors, reducing stress on Ethernet PHY ICs. | Use Scenario: Shielding analog front-end amplifiers and ADC inputs in portable diagnostic devices from ESD during probe handling. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS placed adjacent to connector pins to minimize signal distortion. Use Value: 42.1V clamping prevents amplifier saturation and preserves 16-bit measurement linearity during ±8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-13-F | Unidirectional version; same VRWM, VC, and package but includes cathode band marking | Requires explicit polarity alignment; unsuitable for AC or floating differential signals | Select only when protecting DC rails with known fixed polarity and space-constrained layouts |
| SMBJ26CA-13-F | Same electrical specs but SMB (DO-214AA) package; 25% larger footprint and higher thermal mass | Better power handling margin at elevated ambient; requires revised PCB pad layout | Prefer when board-level thermal management is limited or surge repetition rate exceeds 4 pulses/minute |
Compared with SMAJ26CA-13-F, the unidirectional SMAJ26A-13-F offers identical clamping but mandates correct orientation, while SMBJ26CA-13-F trades board area for improved thermal derating-critical for high-temperature industrial enclosures.
Availability
SMAJ26CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and medical sensor interfaces requiring stable component supply and full RoHS 3 compliance.
Supply support for SMAJ26CA-13-F 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200 standards.
This part belongs to the SMAJ series of surface-mount TVS diodes engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure where compact size and repeatable clamping performance are critical.
FAQ
What is the meaning of the 'C' suffix in SMAJ26CA-13-F?
The 'C' denotes bidirectional configuration, confirming symmetrical clamping behavior for both positive and negative transients. Unlike unidirectional variants (e.g., SMAJ26A-13-F), it lacks a cathode band and does not require polarity-specific PCB placement. This enables simplified layout for AC-coupled or floating signal lines such as CAN bus or RS-485 interfaces.
Is SMAJ26CA-13-F qualified for automotive applications?
No-SMAJ26CA-13-F is the standard commercial-grade variant. For automotive use, Diodes offers the pin-compatible SMAJ26CAQ-13-F, which is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949-certified facilities. The 'Q' suffix explicitly indicates automotive qualification; this distinction is documented in Diodes' product definitions portal.
How does the SMA package affect thermal performance in high-current surge events?
The SMA (DO-214AC) package delivers 1.0W steady-state dissipation at TL = +75°C, with linear derating above that temperature. During 400W transient events, heat is localized at the junction and conducted through leads; its small thermal mass limits sustained energy absorption but enables rapid response. Layout best practices-such as using ≥250 mil copper pours on both terminals-significantly improve pulse-handling capability.
Can SMAJ26CA-13-F be used in parallel for higher surge current handling?
Not recommended without derating and matching. Variations in breakdown voltage (28.9–31.9V) cause uneven current sharing during surges, risking thermal runaway in the lower-VBR device. If higher IPP is required, select a single higher-rated device like SMAJ33CA-13-F (IPP = 7.5A) or SMBJ26CA-13-F (IPP = 11.2A), both with tighter VBR tolerance and improved thermal mass.
SMAJ26CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ26CA-13-F FAQ
1.How can I place an order for SMAJ26CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CA-13-F 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 SMAJ26CA-13-F reliable?
The price and inventory of SMAJ26CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ26CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CA-13-F?
SMAJ26CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CA-13-F 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 SMAJ26CA-13-F?
For technical support, including SMAJ26CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CA-13-F requirements.
6.How does Aetrix verify that SMAJ26CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ26CA-13-F 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 SMAJ26CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ26CA-13-F?
All SMAJ26CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CA-13-F, 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 SMAJ26CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ26CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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