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Diodes Incorporated SMAJ26A-13-F
- Part No.:
- SMAJ26A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26A-13-F.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:1,006,586
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Product details
Overview
SMAJ26A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 26V reverse standoff voltage, 42.1V max clamping voltage at 9.5A peak pulse current, and SMA package. It protects DC power rails and signal lines in industrial power supplies, automotive ECUs, and USB interface circuits against ESD and lightning-induced surges.
For engineers reviewing the SMAJ26A-13-F datasheet, SMAJ26A-13-F pinout, SMAJ26A-13-F application, or SMAJ26A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under IEC 61000-4-5 surge waveforms, unidirectional polarity for DC-biased lines, and SMA thermal performance in high-density PCB layouts.
Technical Context
This TVS operates as a clamping device triggered by avalanche breakdown above its 26V standoff threshold. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5µA at 26V), while fast response time (<1.0ps) enables suppression of sub-nanosecond ESD transients per IEC 61000-4-2 Level 4.
The device handles 400W non-repetitive peak pulse power per 10/1000µs waveform, with derating to 1.0W steady-state dissipation at 75°C lead temperature. Its unidirectional configuration requires cathode-band orientation toward positive rail for proper DC line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10/1000µs surge events without failure |
| Reverse Standoff Voltage | 26V - maximum continuous DC voltage before clamping activation |
| Max Clamping Voltage | 42.1V @ 9.5A - limits transient voltage seen by downstream ICs during surge |
| Breakdown Voltage | 28.9–31.9V @ 1mA - defines precise avalanche onset range for design margining |
| Leakage Current | <5µA @ 26V - minimizes standby power loss in battery-powered systems |
| Package | SMA - surface-mount footprint compatible with automated assembly and 1.0W thermal dissipation |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band marking for polarity identification, 0.064g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms clamping path during overvoltage |
| Cathode | High-side connection point | Connected to protected line (e.g., 24V rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables compliance with IEC 61000-4-5 Level 3 (1kV/2Ω) surge testing on 24V industrial buses |
| Glass Passivated Die | Ensures stable VBR tolerance (±5%) and low parametric drift over 1000-hour HTOL stress |
| Fast Response Time | Sub-nanosecond turn-on supports protection of high-speed interfaces like RS-485 and CAN FD |
| RoHS & Halogen-Free | Meets IPC-J-STD-609 Class 3 moisture sensitivity and automotive PPAP material declarations |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input fuse and DC-DC converter input capacitor. Use Value: Limits transient voltage to ≤42.1V, preventing damage to 36V-rated input MOSFETs and enabling robust operation per EN 61000-4-4/5. | Use Scenario: LIN bus transceiver power rail in door module subjected to ESD and battery reversal events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V supply line upstream of LIN transceiver IC. Use Value: Suppresses 15kV contact ESD per ISO 10605 with <5µA leakage, preserving sleep-mode current budget. |
| USB-C Port ESD Protection | RS-485 Data Line Surge Suppression |
Use Scenario: VBUS line protection in USB-C receptacle on portable medical device requiring IEC 61000-4-2 Level 4 compliance. IC Role / Device Role / Timing Role: Secondary clamping device after polymer PTC, placed adjacent to USB controller VBUS pin. Use Value: Clamps 8kV ESD event to 42.1V within 1ns, preventing latch-up in USB PD controller with 5.5V absolute max rating. | Use Scenario: Termination point of RS-485 trunk line in factory automation network subject to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (paired with complementary device) on A/B differential pair common-mode path. Use Value: Handles 10/1000µs 1kV surge per IEC 61000-4-5 with 42.1V clamping, maintaining signal integrity below receiver common-mode limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-13-F | Bidirectional version with symmetric ±26V standoff and identical clamping (42.1V) | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY pairs) | Select when protecting bidirectional signals without DC bias; otherwise unidirectional SMAJ26A-13-F offers lower leakage |
| SMBJ26A-13-F | Same electrical specs but SMB package (higher 600W PPK, larger footprint, 1.5W PM(AV) | Preferred for higher-energy surge environments where board space allows larger package | Choose when system-level surge testing exceeds 400W requirements or thermal management permits larger footprint |
Compared with SMAJ26CA-13-F and SMBJ26A-13-F, SMAJ26A-13-F provides optimal balance of 400W surge handling, SMA board area efficiency, and <5µA leakage for DC-biased 24V industrial rails-making it the default choice where space and standby current are constrained.
Availability
SMAJ26A-13-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, USB-C port protection, and RS-485 data line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ26A-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 devices, with manufacturing certified to IATF 16949 and product qualification to AEC-Q101 for automotive-grade components.
The SMAJ series is engineered for robust transient suppression in harsh environments, targeting industrial automation, automotive electronics, and communications infrastructure where reliability under surge stress is critical.
FAQ
What is the maximum operating junction temperature for SMAJ26A-13-F?
The device operates from –55°C to +150°C junction temperature. This range supports deployment in under-hood automotive locations and industrial enclosures without active cooling, provided PCB copper area and airflow meet thermal derating curves shown in Figure 6 of DS19005 Rev. 19-2.
Does SMAJ26A-13-F meet AEC-Q101 qualification?
No-SMAJ26A-13-F is a standard-grade part. The automotive-qualified variant is SMAJ26AQ-13-F, which undergoes additional stress testing including HTGB, HTRB, and temperature cycling per AEC-Q101 Rev. E, and is manufactured in IATF 16949-certified facilities.
How does the SMA package affect thermal performance compared to SMB?
The SMA package delivers 1.0W steady-state power dissipation at 75°C lead temperature, versus 1.5W for SMB. This requires tighter thermal pad design-minimum 25 mm² copper area with 4 thermal vias-to maintain TJ < 150°C under full 400W pulse loading per JEDEC JESD24-10 guidelines.
Can SMAJ26A-13-F be used for bidirectional signal line protection?
No-it is unidirectional only. For bidirectional protection (e.g., RS-232, CAN, or Ethernet), use SMAJ26CA-13-F, which features symmetrical breakdown in both directions and identical clamping performance, or implement back-to-back SMAJ26A-13-F devices with external biasing.
SMAJ26A-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:
- 1
- Bidirectional Channels:
- -
- 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
SMAJ26A-13-F FAQ
1.How can I place an order for SMAJ26A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26A-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 SMAJ26A-13-F reliable?
The price and inventory of SMAJ26A-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 SMAJ26A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ26A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26A-13-F?
SMAJ26A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26A-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 SMAJ26A-13-F?
For technical support, including SMAJ26A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26A-13-F requirements.
6.How does Aetrix verify that SMAJ26A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ26A-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 SMAJ26A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ26A-13-F?
All SMAJ26A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26A-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 SMAJ26A-13-F part is unused and in its original packaging.
Return procedure for SMAJ26A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26A-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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