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Diodes Incorporated SMAJ26CA-13
- Part No.:
- SMAJ26CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CA-13.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
SMAJ26CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 26V reverse standoff voltage (VRWM), 28.9–31.9V breakdown voltage (VBR) at 1mA, 42.1V maximum clamping voltage (VC) at 9.5A peak pulse current (IPP), and operates from –55°C to +150°C - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMAJ26CA-13 datasheet, SMAJ26CA-13 pinout, SMAJ26CA-13 application, or SMAJ26CA-13 equivalent, key selection criteria include clamping performance under 8.3ms surge, bidirectional symmetry for AC-coupled interfaces, RoHS-compliant matte tin termination, and compatibility with automated SMT reflow per MIL-STD-202.
Technical Context
This bi-directional TVS uses glass-passivated silicon junctions to achieve fast response (<1 ps) and low dynamic impedance during ESD or lightning-induced transients. Its symmetrical I-V characteristics enable protection of balanced lines (e.g., RS-485, CAN FD) without polarity concerns, and its 400W peak pulse rating is derated linearly above 25°C ambient per JEDEC-defined 8.3ms half-sine waveform.
The device exhibits <5 µA reverse leakage at VRWM and maintains stable clamping up to 150°C junction temperature. Its unidirectional counterpart (SMAJ26A-13) shares identical package and thermal specs but lacks reverse conduction capability - critical for AC signal path protection where voltage polarity reverses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 8.3ms surge events without failure; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| Reverse Standoff Voltage | 26 V - maximum continuous DC or RMS AC voltage before significant leakage; sets operating margin for 24V systems. |
| Breakdown Voltage | 28.9–31.9 V @ 1 mA - tight VBR tolerance ensures predictable turn-on across production lots and temperature. |
| Clamping Voltage | 42.1 V @ 9.5 A - limits downstream IC stress during 10/1000µs surge; enables safe operation of 36V-rated controllers. |
| Junction Temp Range | –55°C to +150°C - qualified for under-hood automotive and industrial motor drive environments. |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD outline; compatible with IPC-7351B footprint and standard pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band omitted (bi-directional symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional terminal pair | No polarity distinction - either pin serves as anode or cathode depending on instantaneous voltage polarity; enables AC line protection without orientation constraints. |
| Case | Non-electrical mechanical interface | Plastic body provides thermal path to PCB copper; no electrical connection - requires no ground tie or isolation clearance beyond standard creepage rules. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR and low leakage over lifetime; resists moisture ingress and metallurgical degradation in humid environments. |
| Bi-directional symmetry | Supports protection of differential buses (e.g., CAN, RS-485) without external polarity management or dual-device placement. |
| RoHS-compliant matte tin plating | Ensures solderability after long-term storage and compatibility with lead-free reflow profiles (J-STD-020C Level 1). |
| 400W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to 2 kV line-to-earth (open-circuit). |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24V DC input rails against load dump and alternator ripple in motor driver PCBs. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and gate drivers. Use Value: Limits transient excursions to ≤42.1V, preventing latch-up or oxide breakdown in 36V-rated MOSFET drivers and microcontrollers. | Use Scenario: Surge suppression on LIN bus and sensor supply lines exposed to battery transients in door modules. IC Role / Device Role / Timing Role: Bidirectional shunt protector for low-speed serial communication lines with ±12V common-mode swing. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) by clamping within 1 ns without polarity-dependent delay. |
| Telecom Power Feeds | Smart Energy Meters |
Use Scenario: Input-stage protection for PoE-powered remote units subjected to induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: First-line TVS on 48V DC feed before DC-DC regulation and Ethernet PHY interface. Use Value: Absorbs 400W surges while holding clamping voltage below 50V - preserving IEEE 802.3af/at compliance margins. | Use Scenario: Protection of metering IC supply pins against EFT bursts and fast transients on AC mains-connected auxiliary rails. IC Role / Device Role / Timing Role: Secondary-level clamp on isolated 5V/3.3V rails derived from switched-mode power supplies. Use Value: Provides sub-100ns response to 5kV EFT (IEC 61000-4-4) with <5 µA leakage at 26V - minimizing standby power impact. |
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-13 | Unidirectional; same VRWM/VBR/VC/IPP but conducts only in reverse bias. | Requires correct polarity placement; unsuitable for AC or differential signals. | Select only when protecting DC rails with fixed polarity and space-constrained layouts. |
| SMBJ26CA-13 | Same electrical specs but SMB (DO-214AA) package - 5.3mm width vs. SMA's 4.3mm; 600W PPK rating. | Higher surge capacity but larger footprint; may require PCB redesign. | Choose when system-level surge testing exceeds 400W or thermal dissipation demands lower junction rise. |
Compared with SMAJ26A-13, the SMAJ26CA-13 eliminates polarity dependency for AC-coupled interfaces; versus SMBJ26CA-13, it trades 200W extra surge headroom for 20% smaller board area - optimal for compact 24V industrial controllers.
Availability
SMAJ26CA-13 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for SMAJ26CA-13 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability, high-surge industrial and automotive applications where consistent clamping performance and AEC-Q200 readiness are required.
FAQ
What is the meaning of the "C" suffix in SMAJ26CA-13?
The "C" denotes bi-directional functionality: the device clamps voltage surges of either polarity symmetrically, unlike unidirectional variants (e.g., SMAJ26A-13) that conduct only when cathode is positive relative to anode. This makes it ideal for protecting AC-coupled or differential signal lines without polarity constraints.
Does SMAJ26CA-13 meet AEC-Q200 stress test requirements?
SMAJ26CA-13 is not AEC-Q200 qualified as a standalone part; however, Diodes Incorporated offers the automotive-grade variant SMAJ26CAQ-13, which undergoes full AEC-Q200 testing including temperature cycling, humidity bias, and surge endurance. For non-automotive industrial use, the standard part meets IEC 61000-4-5 and IEC 61000-4-4.
How does the clamping voltage change with temperature?
Clamping voltage (VC) increases approximately +0.1% per °C rise in junction temperature. At 125°C, VC rises to ~43.8V (vs. 42.1V at 25°C) at 9.5A IPP. Designers must account for this drift when setting downstream voltage tolerances in high-ambient environments like engine compartments.
Can SMAJ26CA-13 be used in parallel for higher surge handling?
Parallel use is not recommended due to mismatched dynamic impedance causing current imbalance. Even minor VBR variation between units leads to one device absorbing >80% of the surge. For higher power, select a single higher-rated device such as SMBJ26CA-13 or SMCJ26CA-13 instead of paralleling SMAJ units.
SMAJ26CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- 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:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMAJ)
SMAJ26CA-13 FAQ
1.How can I place an order for SMAJ26CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CA-13 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 reliable?
The price and inventory of SMAJ26CA-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ26CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CA-13?
SMAJ26CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CA-13 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?
For technical support, including SMAJ26CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CA-13 requirements.
6.How does Aetrix verify that SMAJ26CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ26CA-13 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 meets industry standards.
7.What is the process for return or replacement of SMAJ26CA-13?
All SMAJ26CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CA-13, 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 part is unused and in its original packaging.
Return procedure for SMAJ26CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26CA-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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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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