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Microchip Technology SMAJ26CE3/TR13
- Part No.:
- SMAJ26CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CE3/TR13.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,236
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Product details
Overview
SMAJ26CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for IEC 61000-4-2/4-4/4-5-compliant ESD, EFT, and secondary lightning protection. 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 - deployed in telecom line interfaces, industrial sensor inputs, and automotive body control modules.
For engineers reviewing the SMAJ26CE3/TR13 datasheet, SMAJ26CE3/TR13 pinout, SMAJ26CE3/TR13 application, or SMAJ26CE3/TR13 equivalent, this page delivers verified electrical parameters, bidirectional TVS-specific design context, RoHS-compliant packaging details, and validated alternative parts for surge protection layout reuse and BOM flexibility.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with no cathode marking, enabling AC-coupled signal line protection without polarity concerns. Its <100 ps theoretical response time (unidirectional) and <5 ns for bidirectional operation ensures sub-nanosecond clamping onset during fast transients like ESD contact discharge.
The device uses a silicon avalanche diode structure housed in a DO-214AC (SMA) package with void-free epoxy body (UL94V-0), C-bend leads, and matte-tin plating. Thermal resistance is 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 with recommended footprint - critical for sustained 5 W steady-state dissipation at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V reverse standoff voltage - defines maximum continuous operating voltage before leakage exceeds 1 µA; sets safe margin below system rail in 24 V industrial buses. |
| VBR min @ IBR | 28.9 V at 1 mA - guaranteed avalanche initiation threshold; ensures predictable turn-on before downstream IC damage thresholds. |
| VC @ IPP | 46.6 V at 10.7 A (10/1000 µs) - clamping voltage limits transient overvoltage seen by protected circuitry; stays below typical 50 V MOSFET gate oxide rating. |
| PPP | 500 W peak pulse power - supports high-energy surges per IEC61000-4-5 Class 3 (42 Ω source, 1 kV) without degradation. |
| IPP | 10.7 A peak pulse current - quantifies maximum surge current the device can shunt while maintaining VC ≤ 46.6 V. |
| TJ range | –65 °C to +150 °C operating temperature - enables use in under-hood automotive or outdoor industrial enclosures without derating. |
| Moisture Sensitivity | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow, simplifying SMT assembly logistics. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional configuration with no polarity marking. Body dimensions: 4.93–5.48 mm length × 2.57–2.79 mm width × 2.26 mm height (max); lead pitch 3.99–4.50 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals - either terminal serves as cathode or anode depending on transient polarity; enables AC line protection without orientation constraints. |
| Case / Body | Thermal path & mechanical anchor | Void-free UL94V-0 epoxy body provides structural integrity and thermal conduction to PCB copper; wide leads enhance heat dissipation during repetitive surges. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression | Enables single-device protection of AC-coupled lines (e.g., RS-485, CAN, audio) without polarity-sensitive placement or external diodes. |
| RoHS-compliant "e3" suffix | Matte-tin-plated leads meet EU RoHS Directive 2011/65/EU and JEDEC J-STD-020B Level 1 moisture requirements - zero dry-pack needed. |
| IEC61000-4-5 Class 3 compliance | Validated for secondary lightning protection with 42 Ω source impedance up to 1 kV test level - suitable for industrial fieldbus and building automation interfaces. |
| Fast clamping response | <5 ns turn-on for bidirectional mode ensures protection against ESD events per IEC61000-4-2 ±8 kV contact discharge before IC latch-up occurs. |
| Tape-and-reel packaging | TR13 variant supplied in 13-inch reels (2500 pcs) per EIA-481-1-A - optimized for high-volume automated SMT placement with consistent feed reliability. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: 24 V analog sensor signals (e.g., pressure, temperature) routed through long harnesses exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry to clamp both positive and negative transients before reaching ADC input or op-amp front-end. Use Value: Maintains signal integrity by limiting transients to ≤46.6 V while surviving repeated 10.7 A surges - prevents ADC saturation and op-amp input stage damage. |
Use Scenario: LIN bus communication lines in door modules subjected to ESD events during assembly and service, plus battery reversal transients. IC Role / Device Role / Timing Role: Primary surge protection device across LIN differential pair, leveraging symmetrical clamping to handle both polarities without biasing. Use Value: Eliminates need for dual unidirectional TVS or external series resistors; reduces BOM count and PCB area while meeting ISO 10605 ±15 kV ESD requirement. |
| RS-485 Data Line Protection | Power-over-Ethernet (PoE) Interface |
|
Use Scenario: Industrial RS-485 transceivers connected to field wiring subject to induced lightning surges and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional TVS placed across A/B differential lines to clamp common-mode transients while preserving signal swing. Use Value: Clamps surges to ≤46.6 V within <5 ns, preventing transceiver latch-up and ensuring >10,000 surge cycles per IEC61000-4-5 Class 3 durability. |
Use Scenario: 48 V DC power pairs in IEEE 802.3af/at PoE injectors and splitters exposed to hot-swap transients and cable ESD. IC Role / Device Role / Timing Role: Secondary protection stage after primary PoE controller, shunting residual surges that bypass upstream filtering. Use Value: Withstands 500 W peak pulses and maintains VC < 50 V - protects PoE PD controllers rated to 57 V absolute max, avoiding catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Same electrical specs (VWM=26 V, VC=46.6 V), but non-RoHS tin-lead plating and no "e3" suffix; not compliant with modern environmental mandates. | Restricted to legacy military/aerospace programs requiring MIL-PRF-19500 screening (JANTX), where RoHS exemption applies. | Select SMAJ26CA only if tin-lead solder process or JANTX qualification is mandatory; otherwise prefer SMAJ26CE3/TR13 for commercial/industrial use. |
| SMBJ26CA | DO-214AA (SMB) package - larger body (5.28 mm × 4.60 mm) and higher thermal mass; same VWM/VC, but 600 W PPP rating and 12.3 A IPP. | Used where higher surge margin or board-level thermal relief is needed; requires larger PCB footprint and different pad layout. | Choose SMBJ26CA when surge energy exceeds 500 W or ambient temperature exceeds 125 °C; otherwise SMAJ26CE3/TR13 offers optimal size/power density for space-constrained designs. |
Compared with SMAJ26CA and SMBJ26CA, SMAJ26CE3/TR13 uniquely combines RoHS compliance, DO-214AC compactness, and validated IEC61000-4-5 Class 3 performance - making it the preferred choice for new industrial and automotive electronics where regulatory alignment and miniaturization are prioritized.
Availability
SMAJ26CE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, RS-485 data lines, and Power-over-Ethernet interfaces requiring stable component supply, full RoHS compliance, and IEC61000-4-5 Class 3 surge immunity.
Supply support for SMAJ26CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMAJ series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - delivering 500 W pulse handling in the industry-standard DO-214AC footprint with robust thermal and environmental specifications.
FAQ
What does the "C" suffix in SMAJ26CE3/TR13 indicate?
The "C" suffix denotes bidirectional construction - meaning SMAJ26CE3/TR13 has symmetrical avalanche characteristics and no polarity marking, allowing it to protect AC-coupled or differential signal lines (e.g., RS-485, CAN) without regard to terminal orientation. This differs from unidirectional variants like SMAJ26A, which require correct cathode placement relative to ground.
Is SMAJ26CE3/TR13 RoHS compliant and lead-free?
Yes, SMAJ26CE3/TR13 is fully RoHS compliant, as confirmed by the "e3" suffix per Microsemi documentation. It features annealed matte-tin plating on C-bend leads, meets JEDEC J-STD-020B Level 1 moisture sensitivity, and requires no dry pack prior to reflow - satisfying EU Directive 2011/65/EU and global environmental requirements.
What is the clamping voltage of SMAJ26CE3/TR13 under a 10/1000 µs surge?
SMAJ26CE3/TR13 has a maximum clamping voltage (VC) of 46.6 V at 10.7 A peak pulse current (IPP) under the standardized 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMAJ26CE3/TR13 be used for IEC61000-4-5 secondary lightning protection?
Yes, SMAJ26CE3/TR13 is validated for IEC61000-4-5 secondary lightning protection with 42 Ω source impedance up to Class 3 (1 kV test level), as explicitly stated in the Microsemi datasheet. Its 500 W peak pulse power rating and 46.6 V clamping ensure reliable operation in industrial fieldbus and building automation applications exposed to induced surges.
What is the thermal resistance of SMAJ26CE3/TR13 and how does it affect PCB layout?
SMAJ26CE3/TR13 has a thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 with the recommended footprint. This means adequate copper pour and thermal vias under the leads are essential to maintain junction temperature below 150 °C during repetitive 5 W steady-state dissipation - refer to the pad layout on page 5 of the Microsemi datasheet for optimal thermal design.
SMAJ26CE3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ26CE3/TR13 FAQ
1.How can I place an order for SMAJ26CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CE3/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 SMAJ26CE3/TR13 reliable?
The price and inventory of SMAJ26CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ26CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CE3/TR13?
SMAJ26CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CE3/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 SMAJ26CE3/TR13?
For technical support, including SMAJ26CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ26CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ26CE3/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 SMAJ26CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ26CE3/TR13?
All SMAJ26CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CE3/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 SMAJ26CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ26CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26CE3/TR13 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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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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