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Microchip Technology SMAJ11CE3/TR13
- Part No.:
- SMAJ11CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CE3/TR13.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,876
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Product details
Overview
SMAJ11CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 11 V reverse standoff voltage (VWM), 12.2 V minimum breakdown voltage (VBR), 20.1 V maximum clamping voltage (VC) at 24.9 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial I/O, telecom interfaces, and automotive body electronics.
For engineers reviewing the SMAJ11CE3/TR13 datasheet, SMAJ11CE3/TR13 pinout, SMAJ11CE3/TR13 application, or SMAJ11CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin plating for lead-free assembly.
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 and induced RF transients. Its silicon avalanche structure delivers stable clamping under repetitive surges up to 0.01% duty cycle, with junction-to-lead thermal resistance of 15 °C/W ensuring reliable power dissipation during transient overload.
The device meets IEC61000-4-5 secondary lightning immunity at Class 4 (42 Ω source) and Class 2 (12 Ω source), supporting protection of downstream CMOS, BiCMOS, and analog front-ends without polarity-sensitive layout constraints. Its 1.56 W steady-state power rating at 25 °C ambient and 5 W at 75 °C lead temperature defines safe continuous operation limits on FR4 PCBs with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Reverse Standoff) | 11 V - Maximum continuous DC or RMS voltage applied without triggering clamping; sets operating margin before avalanche onset. |
| VBR min @ IBR | 12.2 V @ 1 mA - Minimum voltage at which device enters controlled avalanche; ensures predictable turn-on threshold. |
| VC @ IPP | 20.1 V @ 24.9 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPP | 500 W - Peak pulse power handling capacity; defines survivability against standardized lightning and switching transients. |
| IPP | 24.9 A - Peak current supported at rated clamping voltage; used to size series impedance for targeted surge energy absorption. |
| ID @ VWM | 1 µA - Max leakage at standoff voltage; ensures negligible standby power loss and no false triggering in low-power systems. |
| Operating Temp | –65 °C to +150 °C - Full industrial temperature range support; enables deployment in under-hood automotive and outdoor telecom enclosures. |
Pinout & Package
Package: DO-214AC (SMAJ), surface-mount, void-free thermosetting epoxy case with C-bend leads, RoHS-compliant annealed matte-tin plating, moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient return path (bidirectional) | Provides symmetrical conduction path to ground or rail for positive/negative surges; no polarity marking required. |
| Cathode (banded end) | Transient return path (bidirectional) | Same functional role as anode in bidirectional configuration; band indicates cathode convention but does not imply unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| IEC61000-4-5 Class 4 compliance (42 Ω) | Supports secondary lightning protection in industrial control cabinets and building automation gateways. |
| RoHS-compliant "e3" suffix | Meets global environmental regulations with annealed matte-tin plating compatible with Pb-free reflow profiles. |
| DO-214AC thermal design | 15 °C/W junction-to-lead resistance enables 500 W pulse handling with minimal board-level copper area. |
| Fast response time | <5 ns bidirectional turn-on ensures suppression of sub-10 ns ESD events before IC latch-up occurs. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC sensor inputs and relay outputs exposed to load dump and inductive kickback in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp transients before reaching MCU GPIO or RS-485 transceivers. Use Value: 20.1 V clamping voltage prevents damage to 3.3 V/5 V logic interfaces while surviving 24.9 A surges per IEC61000-4-5. | Use Scenario: LIN bus and switched 12 V power lines in door modules and seat controllers subject to battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on supply rail and data line, operating symmetrically across ±12 V fault conditions. Use Value: –65 °C to +150 °C operating range ensures reliability in under-dash environments; DO-214AC package withstands automotive thermal cycling. |
| Telecom Ethernet Surge Protection | Medical Diagnostic Equipment Interfaces |
Use Scenario: Secondary surge protection on PoE-powered Ethernet PHY interfaces where primary protection resides upstream. IC Role / Device Role / Timing Role: Fast-clamping element across differential pairs or between signal and chassis ground to limit common-mode transients. Use Value: <5 ns response time captures fast-rising ESD events before PHY receiver input stages are overstressed. | Use Scenario: Patient-connected analog front-ends (ECG, EEG) requiring ultra-low leakage and high isolation integrity. IC Role / Device Role / Timing Role: Low-leakage (1 µA) bidirectional clamp on isolated sensor inputs to prevent baseline shift during ESD discharge. Use Value: 1 µA max standby current avoids DC offset errors in high-gain instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA | Same electrical specs and DO-214AC package; lacks "e3" RoHS suffix and TR13 tape-and-reel packaging. | No RoHS compliance or standardized reel quantity; suitable only for legacy non-RoHS production. | Select SMAJ11CE3/TR13 when lead-free assembly and traceable 2500-unit reels are required. |
| SMBJ11CA | Lower 400 W peak pulse power rating; identical VWM, VBR, VC, and DO-214AA package with slightly larger footprint. | Reduced surge margin in high-energy lightning environments; requires PCB layout revision due to different pad dimensions. | Choose SMBJ11CA only if system-level testing confirms 400 W suffices and board space allows DO-214AA mounting. |
Compared with SMAJ11CA and SMBJ11CA, SMAJ11CE3/TR13 uniquely combines RoHS compliance, 500 W surge rating, and EIA-481-1-A tape-and-reel packaging - making it optimal for volume industrial manufacturing with strict environmental and logistics requirements.
Availability
SMAJ11CE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom Ethernet surge protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ11CE3/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 surface-mount transient suppression in harsh environments, delivering 500 W surge capability in compact DO-214AC packages with extended temperature and reliability screening options.
FAQ
What does the "CE3/TR13" suffix mean in SMAJ11CE3/TR13?
The "C" denotes bidirectional configuration, "E3" indicates RoHS-compliant matte-tin plating per JEDEC standards, and "TR13" specifies EIA-481-1-A tape-and-reel packaging with 2500 units per 13-inch reel. SMAJ11CE3/TR13 thus provides full environmental compliance and automated assembly readiness - critical for high-volume industrial manufacturing where SMAJ11CE3/TR13 must meet both regulatory and production-line requirements.
How does SMAJ11CE3/TR13 differ from unidirectional SMAJ11A variants?
SMAJ11CE3/TR13 provides symmetrical clamping for both positive and negative transients, eliminating polarity-dependent placement constraints - unlike unidirectional SMAJ11A, which requires correct anode/cathode orientation relative to ground. SMAJ11CE3/TR13's bidirectional behavior makes it ideal for AC-coupled lines, floating sensors, or dual-rail systems where SMAJ11CE3/TR13 simplifies layout and improves fault tolerance.
Is SMAJ11CE3/TR13 compliant with IEC61000-4-5 for secondary lightning protection?
Yes, SMAJ11CE3/TR13 is certified for IEC61000-4-5 secondary lightning protection at Class 4 (42 Ω source impedance) and Class 2 (12 Ω source impedance), supporting peak currents up to 24.9 A. This validation means SMAJ11CE3/TR13 can be deployed in industrial control panels and building management systems where SMAJ11CE3/TR13 must absorb lightning-induced surges without degradation.
What is the thermal resistance and power derating behavior of SMAJ11CE3/TR13?
SMAJ11CE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient resistance of 80 °C/W on FR4 with recommended footprint. Its 500 W peak rating derates linearly above 25 °C ambient, maintaining 5 W steady-state dissipation at 75 °C lead temperature - allowing SMAJ11CE3/TR13 to sustain repeated surges in thermally constrained enclosures without thermal runaway.
Can SMAJ11CE3/TR13 replace SMAJ11CA in existing designs?
Yes, SMAJ11CE3/TR13 is a direct drop-in replacement for SMAJ11CA in terms of electrical specs, DO-214AC package, and pinout - with added RoHS compliance and standardized 2500-unit reel packaging. No PCB changes are needed, and SMAJ11CE3/TR13 maintains identical clamping performance while meeting modern environmental and logistics requirements.
SMAJ11CE3/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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 24.9A
- 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)
SMAJ11CE3/TR13 FAQ
1.How can I place an order for SMAJ11CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CE3/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 SMAJ11CE3/TR13 reliable?
The price and inventory of SMAJ11CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ11CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CE3/TR13?
SMAJ11CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CE3/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 SMAJ11CE3/TR13?
For technical support, including SMAJ11CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ11CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ11CE3/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 SMAJ11CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ11CE3/TR13?
All SMAJ11CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CE3/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 SMAJ11CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ11CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11CE3/TR13 Tags
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