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Microchip Technology SMAJ26CAE3/TR13
- Part No.:
- SMAJ26CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CAE3/TR13.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,623
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Product details
Overview
SMAJ26CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. 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, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial I/O modules and telecom interface circuits.
For engineers reviewing the SMAJ26CAE3/TR13 datasheet, SMAJ26CAE3/TR13 pinout, SMAJ26CAE3/TR13 application, or SMAJ26CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte-tin plating, DO-214AC package compatibility, IEC61000-4-2/4-4/4-5 compliance, and 10.7 A surge current handling at 46.6 V clamping.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with <100 ps theoretical response time for unidirectional mode and <5 ns for bidirectional conduction - enabling effective suppression of fast-rising ESD events per IEC61000-4-2 Level 4 (±15 kV contact). Its 26 V VWM ensures reliable blocking during normal operation while allowing conduction only above 28.9 V VBR.
The device delivers 500 W peak pulse power at 25 °C with 0.01% duty cycle, supported by thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 (1 oz Cu). It maintains stable performance across -65 °C to +150 °C operating temperature range and meets moisture sensitivity Level 1 per J-STD-020B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before clamping begins; sets safe operating margin for 24 V DC systems. |
| VBR min @ IBR | 28.9 V @ 1 mA - Minimum voltage at which avalanche breakdown initiates; defines lower bound of clamping onset threshold. |
| VC @ IPP | 46.6 V @ 10.7 A - Maximum clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure. |
| PPP | 500 W - Peak pulse power dissipation capability; enables robust protection against high-energy transients like lightning-induced surges. |
| IPP | 10.7 A - Peak pulse current handled at VC; directly correlates with surge energy absorption capacity (W × s). |
| ID @ VWM | 1 µA - Maximum leakage current at rated standoff voltage; ensures minimal power loss and no interference with low-power sensor circuits. |
| Operating Temp | -65 °C to +150 °C - Wide temperature range supports deployment in automotive engine bays and industrial outdoor enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy body meeting UL94V-0; cathode band omitted on bidirectional devices; marking reads "26CAe3".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminals | Identical symmetrical terminals - no polarity marking; conducts equally in both directions above ±28.9 V breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| RoHS-compliant matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and eliminates lead-based contamination in final assemblies. |
| IEC61000-4-5 Class 1 support (42 Ω source) | Validated for secondary lightning surge immunity up to 42 Ω source impedance - critical for telecom line card interfaces. |
| DO-214AC footprint compatibility | Direct replacement for industry-standard SMA packages; enables drop-in layout reuse across multiple TVS families. |
| 100% temperature cycling screening option | Available with MA prefix for avionics-grade reliability (-55 °C to +125 °C, 10 cycles), though not standard on SMAJ26CAE3/TR13. |
Applications
| Industrial PLC I/O Protection | Telecom Ethernet Port Surge Suppression |
|---|---|
Use Scenario: 24 V DC input/output channels in programmable logic controllers exposed to inductive load switching and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp transients before reaching isolation amplifiers or digital I/O drivers. Use Value: Limits voltage excursion to ≤46.6 V during 10.7 A surges, preventing latch-up or gate oxide damage in downstream ASICs and optocouplers. |
Use Scenario: RJ45 Ethernet ports on enterprise switches subjected to ESD events and induced surges from nearby AC mains or lightning. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs (e.g., TX+/TX−) to absorb common-mode transients before magnetics or PHY ICs. Use Value: Meets IEC61000-4-2 Level 4 (±15 kV contact) and IEC61000-4-5 Class 1 (42 Ω source), preserving signal integrity and PHY longevity. |
| Automotive Body Control Module Power Rails | Medical Sensor Interface Protection |
Use Scenario: 12–24 V supply inputs in BCMs facing load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary fuse and LC filter, shunting residual spikes to chassis ground. Use Value: Withstands 500 W pulses and operates from -65 °C to +150 °C, supporting under-hood thermal requirements and transient resilience. |
Use Scenario: Low-voltage analog front-ends (e.g., ECG, EEG sensors) connected to patient cables susceptible to ESD and electrostatic coupling. IC Role / Device Role / Timing Role: High-impedance, low-leakage (1 µA) TVS on signal inputs to prevent amplifier saturation or ADC offset shift. Use Value: Sub-µA standby current avoids loading sensitive mV-level biopotential signals; fast <5 ns response prevents transient-induced data corruption. |
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-E3/5A (Vishay) | Unidirectional; same VWM/VBR/VC, but asymmetric conduction - requires correct polarity placement. | Requires explicit anode/cathode orientation; unsuitable for AC or floating lines without external diode pairing. | Select when protecting unidirectional DC rails where polarity is fixed and board space allows directional layout. |
| 1.5KE27CA (ON Semiconductor) | Through-hole DO-15 package; 1500 W rating; higher VC (45.7 V) but larger footprint and slower thermal response. | Not surface-mount compatible; used in legacy designs or high-energy surge zones where PCB real estate permits axial leads. | Choose for retrofitting through-hole boards or where >500 W surge margin is required despite packaging trade-offs. |
Compared with SMAJ26CAE3/TR13, SMAJ26A-E3/5A offers identical electrical specs but lacks bidirectional symmetry, while 1.5KE27CA provides higher pulse power at the cost of SMT compatibility and modern RoHS compliance.
Availability
SMAJ26CAE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, telecom Ethernet port surge suppression, and automotive body control module power rails requiring stable component supply and full RoHS compliance.
Supply support for SMAJ26CAE3/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 for robust, surface-mount transient suppression in harsh environments - targeting applications demanding fast response, high surge tolerance, and long-term stability under thermal cycling.
FAQ
What does the "CA" suffix indicate in SMAJ26CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ26CAE3/TR13 clamps transients equally in both polarities, unlike unidirectional variants (e.g., SMAJ26A). This eliminates polarity concerns during placement and enables protection of AC-coupled or floating signal paths without external diode pairing.
Is SMAJ26CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ26CAE3/TR13 is validated for IEC61000-4-5 secondary lightning surge immunity with 42 Ω source impedance (Class 1) and 12 Ω source impedance (Class 2), per Microsemi's datasheet. Its 46.6 V clamping voltage at 10.7 A ensures downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the thermal resistance of SMAJ26CAE3/TR13, and how does it affect PCB layout?
SMAJ26CAE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient of 80 °C/W on FR4 with 1 oz Cu and recommended footprint. To maintain reliability under repeated surges, designers must follow the specified pad layout (Page 5 of datasheet) - including minimum copper area and thermal vias - to avoid localized overheating and premature degradation.
Does SMAJ26CAE3/TR13 require a heatsink for 500 W pulse handling?
No external heatsink is required for single-event 500 W pulses (10/1000 µs), as SMAJ26CAE3/TR13 relies on short-duration thermal mass and PCB copper for heat dissipation. However, repetitive surges demand strict adherence to 0.01% duty cycle limits and proper board-level thermal design - exceeding this risks cumulative junction temperature rise beyond 150 °C.
How does the "TR13" suffix impact packaging and assembly for SMAJ26CAE3/TR13?
The "TR13" suffix indicates tape-and-reel packaging per EIA-481-1-A standard: 12 mm carrier tape, 2500 units per 13-inch reel. This format supports automated SMT placement and ensures consistent orientation and spacing - critical for high-speed pick-and-place machines in volume manufacturing of industrial and telecom equipment using SMAJ26CAE3/TR13.
SMAJ26CAE3/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:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- 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)
SMAJ26CAE3/TR13 FAQ
1.How can I place an order for SMAJ26CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CAE3/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 SMAJ26CAE3/TR13 reliable?
The price and inventory of SMAJ26CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ26CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CAE3/TR13?
SMAJ26CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CAE3/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 SMAJ26CAE3/TR13?
For technical support, including SMAJ26CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ26CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ26CAE3/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 SMAJ26CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ26CAE3/TR13?
All SMAJ26CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CAE3/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 SMAJ26CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ26CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26CAE3/TR13 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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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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