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Microchip Technology SMAJ26E3/TR13
- Part No.:
- SMAJ26E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26E3/TR13.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,313
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Product details
Overview
SMAJ26E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary and secondary lightning surge protection, ESD/EFT immunity per IEC61000-4-2/4-4, and inductive switching transient clamping. It features a 26 V reverse standoff voltage (VWM), 28.9 V minimum breakdown voltage (VBR), 46.6 V maximum clamping voltage (VC) at 10.7 A peak pulse current (IPP), and 500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the SMAJ26E3/TR13 datasheet, SMAJ26E3/TR13 pinout, SMAJ26E3/TR13 application, or SMAJ26E3/TR13 equivalent, this device serves as a RoHS-compliant, tape-and-reel packaged (TR13) TVS for DC power rail and signal line protection in industrial control, automotive body electronics, and telecom interface circuits where fast response (<100 ps theoretical) and stable clamping under repetitive surges are required.
Technical Context
This unidirectional TVS operates with cathode-banded polarity and uses an avalanche breakdown mechanism to clamp transients before sensitive downstream components experience overvoltage stress. Its low thermal resistance (15 °C/W junction-to-lead) enables effective heat dissipation during high-energy 10/1000 µs surges, while its DO-214AC (SMA) package supports automated SMT assembly and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
The SMAJ26E3/TR13 delivers consistent clamping performance across -65 °C to +150 °C operating temperature range and maintains <1 µA standby leakage current at rated VWM. Its 10.7 A IPP rating corresponds directly to 500 W peak power dissipation under standardized test conditions, enabling reliable coordination with upstream fuses or PTCs in overvoltage protection networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets upper limit for protected circuit operating voltage. |
| VBR min @ IBR | 28.9 V @ 1 mA - Minimum voltage at which avalanche breakdown begins; ensures predictable turn-on margin above VWM. |
| VC @ IPP | 46.6 V @ 10.7 A - Maximum clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs. |
| PPP | 500 W - Peak pulse power handling capability; determines survivability against standardized lightning-induced transients (IEC61000-4-5). |
| IPP | 10.7 A - Peak current the device safely shunts at VC; used to size series impedance and verify coordination with system-level protection architecture. |
| ID @ VWM | <1 µA - Reverse leakage current at rated standoff voltage; ensures negligible power loss and no interference in low-power sensor or bias circuits. |
| Response Time | <100 ps theoretical - Time from transient onset to clamping initiation; enables protection against sub-nanosecond ESD events per IEC61000-4-2. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case with matte-tin-plated C-bend leads. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path | Connected to protected line (e.g., VIN, signal); conducts surge current toward ground when VAK exceeds VBR. |
| Cathode | Reference node / clamping reference | Connected to system ground or low-impedance return; establishes clamping voltage relative to this node; marked by band. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating; eliminates lead-based solder compatibility concerns in modern assembly lines. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel per EIA-481-1-A; enables high-throughput pick-and-place placement without manual handling or static exposure. |
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning protection with 12 Ω source impedance up to 12 V VWM; SMAJ26E3/TR13 covers Class 2 (16 V) and Class 1 (30 V) thresholds, supporting broad system-level certification. |
| Moisture Sensitivity Level 1 | No dry pack or baking required prior to reflow; reduces manufacturing overhead and eliminates moisture-related popcorning risk during soldering. |
| Low thermal resistance (15 °C/W) | Enables efficient heat transfer from junction to PCB copper; sustains repeated 500 W surges without thermal runaway when mounted on FR4 with recommended footprint. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input/output channels in programmable logic controllers exposed to inductive kickback from solenoids and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between channel and ground to clamp negative-going transients before they reach isolation amplifiers or microcontroller GPIOs. Use Value: Limits transient voltage to ≤46.6 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while surviving >10,000 surges per MIL-STD-750 Method 2026. |
Use Scenario: LIN bus or switched 12 V supply lines in door modules, seat controls, or lighting drivers subject to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on power rail, positioned upstream of LDOs and CAN/LIN transceivers to absorb energy before regulation stage. Use Value: Clamps 10/1000 µs surges to 46.6 V at 10.7 A, maintaining safe operating area for downstream 40 V-rated regulators and ensuring functional safety compliance per ISO 16750-2. |
| Telecom Interface Protection | Medical Sensor Signal Conditioning |
Use Scenario: RS-485 or Ethernet PHY lines in networked medical or building automation equipment connected to long cable runs susceptible to induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (e.g., SMAJ26CA) used in differential pair protection; SMAJ26E3/TR13 applied to single-ended bias rails or shield connections. Use Value: Provides <100 ps response to ESD events per IEC61000-4-2 Level 4 (8 kV contact), preserving signal integrity and avoiding false triggering in high-impedance receiver inputs. |
Use Scenario: Analog front-end of patient monitoring devices where ECG/EEG electrodes connect via long cables acting as antennas for RF and EFT noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on amplifier supply rails and sensor bias lines to suppress sub-microsecond transients without injecting offset or degrading CMRR. Use Value: Maintains baseline stability in µV-level measurements by limiting clamping-induced current injection and eliminating post-surge recovery drift typical of higher-leakage suppressors. |
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 | No "e3" RoHS suffix; SnPb terminations; same electrical specs and DO-214AC package. | Required only where legacy SnPb assembly or non-RoHS compliance is mandated (e.g., aerospace repair, military depot). | Select SMAJ26A if Pb-containing solder process is used and RoHS exemption applies; otherwise prefer SMAJ26E3/TR13 for new designs. |
| SMBJ26A | Same VWM/VC/IPP, but SMB (DO-214AA) package: 3.5 mm width vs. SMA's 2.8 mm; 600 W rating (higher PPP margin). | Used where board space allows wider footprint and higher surge margin is needed (e.g., outdoor telecom enclosures). | Choose SMBJ26A when layout permits larger pad area and system-level testing requires >500 W headroom; SMAJ26E3/TR13 remains optimal for space-constrained industrial PCBs. |
Compared with SMAJ26A and SMBJ26A, SMAJ26E3/TR13 offers RoHS compliance and compact DO-214AC packaging ideal for high-density SMT layouts, while retaining identical clamping performance and thermal robustness-making it the preferred choice for new industrial and automotive designs requiring regulatory alignment and miniaturization.
Availability
SMAJ26E3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom interface circuits requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ26E3/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was developed specifically for surface-mount transient suppression in harsh environments, emphasizing fast response, repeatable clamping, and robust thermal performance in compact DO-214AC packages.
FAQ
What is the clamping voltage of SMAJ26E3/TR13 at its rated peak pulse current?
The SMAJ26E3/TR13 has a maximum clamping voltage (VC) of 46.6 V when subjected to its rated 10.7 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring compatibility with 3.3 V, 5 V, and 24 V system components downstream of the device.
Is SMAJ26E3/TR13 unidirectional or bidirectional?
SMAJ26E3/TR13 is a unidirectional transient voltage suppressor, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only in reverse bias (anode-to-cathode) above its breakdown voltage and must be installed with the cathode band oriented toward ground. For bidirectional protection, Microsemi offers SMAJ26CA, which clamps symmetrically for AC or differential signal lines.
What does the "TR13" suffix mean in SMAJ26E3/TR13?
The "TR13" suffix in SMAJ26E3/TR13 specifies tape-and-reel packaging: 2500 units per 13-inch reel conforming to EIA-481-1-A standards. This format enables automated SMT placement, ensures electrostatic-safe handling, and supports just-in-time inventory management for high-volume production. The "e3" denotes RoHS-compliant matte-tin plating.
Can SMAJ26E3/TR13 be used for IEC61000-4-5 lightning surge protection?
Yes, SMAJ26E3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. It meets Class 1 (30 V VWM max) and Class 2 (16 V VWM max) requirements, making it suitable for 24 V industrial power rails and 12 V automotive subsystems where coordinated protection with upstream fuses is implemented.
What is the maximum operating temperature range for SMAJ26E3/TR13?
SMAJ26E3/TR13 operates reliably from -65 °C to +150 °C, covering extended industrial and under-hood automotive environments. Its thermal resistance of 15 °C/W (junction-to-lead) and 80 °C/W (junction-to-ambient on FR4) ensures stable clamping performance across this full range, provided the PCB layout follows Microsemi's recommended pad dimensions and copper pour guidelines.
SMAJ26E3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- 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:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ26E3/TR13 FAQ
1.How can I place an order for SMAJ26E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26E3/TR13 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 SMAJ26E3/TR13 reliable?
The price and inventory of SMAJ26E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ26E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26E3/TR13?
SMAJ26E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26E3/TR13 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 SMAJ26E3/TR13?
For technical support, including SMAJ26E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26E3/TR13 requirements.
6.How does Aetrix verify that SMAJ26E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ26E3/TR13 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 SMAJ26E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ26E3/TR13?
All SMAJ26E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26E3/TR13, 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 SMAJ26E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ26E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26E3/TR13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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