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Microchip Technology SMAJ10E3/TR13
- Part No.:
- SMAJ10E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10E3/TR13.pdf
- Description:
- TVS DIODE 10VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,547
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Product details
Overview
SMAJ10E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for primary and secondary lightning surge protection, ESD/EFT immunity per IEC61000-4-2/4-4, and inductive switching transient clamping in DC power rails and signal lines. It features 10 V working standoff voltage (VWM), 11.1 V minimum breakdown voltage (VBR), 18.8 V maximum clamping voltage (VC) at 26.6 A peak pulse current, and 500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the SMAJ10E3/TR13 datasheet, SMAJ10E3/TR13 pinout, SMAJ10E3/TR13 application, or SMAJ10E3/TR13 equivalent, this device is selected for robust overvoltage protection in automotive body electronics, industrial I/O modules, telecom power interfaces, and embedded power supply inputs where fast response (<100 ps theoretical), low leakage (<1 µA @ VWM), and RoHS-compliant surface-mount reliability are required.
Technical Context
The SMAJ10E3/TR13 operates as a unidirectional avalanche diode with cathode-banded polarity, optimized for clamping transients on positive-rail circuits. Its junction-to-lead thermal resistance is 15 °C/W, enabling effective heat dissipation during repetitive 500 W surges under FR4 PCB mounting with recommended footprint.
It meets IEC61000-4-5 secondary lightning protection up to Class 4 (42 Ω source impedance) and Class 2 (12 Ω source impedance), with verified clamping performance across 10/1000 µs and 8/20 µs waveforms. Standby current remains ≤1 µA at 10 V, supporting low-power system monitoring without loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 10 V - Maximum continuous reverse voltage before conduction; defines safe operating margin for 12 V nominal DC systems. |
| VBR (Min) | 11.1 V @ 1 mA - Guaranteed avalanche initiation threshold; ensures predictable turn-on above normal operating voltage. |
| VC @ IPP | 18.8 V @ 26.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to <19 V. |
| PPP | 500 W - Peak pulse power handling at 25 °C; supports repeated surge events without degradation when thermally managed. |
| ID @ VWM | ≤1 µA - Ultra-low leakage current; avoids battery drain or signal path interference in always-on circuits. |
| tclamp | <100 ps theoretical - Sub-nanosecond response enables protection of high-speed logic and analog front-ends. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for thermal and mechanical robustness. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy case (UL94V-0), C-bend tin-lead or matte-tin-plated terminals, cathode indicated by band. Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to ground or return path | Provides low-impedance surge shunt path to reference plane; must be routed with minimal inductance. |
| Cathode | High-side connection to protected line | Marked by band; connects to input rail or signal line requiring clamping; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Lead-free matte-tin plating per JEDEC J-STD-020B; compatible with standard reflow profiles (260 °C/10 s). |
| Tape-and-reel packaging | TR13 = 13-inch reel, 2500 units; supports automated SMT placement with EIA-481-1-A compliance. |
| IEC61000-4-5 Class 4 support | Validated for secondary lightning protection with 42 Ω source impedance up to 1 kV test level. |
| Steady-state power rating | 5 W @ TL = 75 °C - Enables sustained thermal management on copper-pour PCBs without derating. |
| Moisture sensitivity | Level 1 per IPC/JEDEC J-STD-020B - No baking or dry-pack required prior to assembly. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: 12 V battery-fed microcontroller power rail exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping positive surges on VCC line to protect LDOs, MCUs, and CAN transceivers. Use Value: Limits clamped voltage to 18.8 V, staying below absolute maximum ratings of 20 V automotive-grade ICs while surviving 500 W pulses. |
Use Scenario: 24 V DC digital input channel subject to field-wiring ESD and inductive kickback from solenoid coils. IC Role / Device Role / Timing Role: Front-end transient clamp on optocoupler input side, placed before series current-limiting resistor. Use Value: Sub-100 ps response prevents latch-up in opto-ICs; 1 µA leakage avoids false triggering in high-impedance sensing circuits. |
| Telecom AC/DC Adapter Output | Embedded System USB VBUS Line |
Use Scenario: Secondary-side 12 V output of isolated flyback adapter subjected to conducted surges from upstream mains disturbances. IC Role / Device Role / Timing Role: Final-stage overvoltage protector between adapter output and downstream DC-DC converters. Use Value: 500 W rating handles multiple 10/1000 µs surges without degradation; DO-214AC package allows compact layout near connector. |
Use Scenario: VBUS line of USB 2.0 host port exposed to human-body-model (HBM) ESD events during cable insertion. IC Role / Device Role / Timing Role: Primary ESD clamp on +5 V supply rail feeding USB PHY and hub controller. Use Value: Complies with IEC61000-4-2 Level 4 (±15 kV air/±8 kV contact); clamps to 18.8 V before USB PHY damage threshold (≈20 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Same VWM, VBR, VC, and PPP; non-RoHS tin-lead plating; no "e3" or "TR" suffixes. | Requires leaded solder process; not suitable for RoHS-compliant production. | Select SMAJ10A only for legacy leaded assembly or qualification-critical avionics programs using MA/MX screening prefixes. |
| SMBJ10A | Same electrical specs but SMB (DO-214AA) package: 2.57 mm width vs. SMA's 2.26 mm max; 600 W PPP rating. | Higher power margin but larger footprint; may require PCB redesign for space-constrained layouts. | Choose SMBJ10A when thermal margin >500 W is needed and board area permits wider package; otherwise SMAJ10E3/TR13 offers optimal size/power balance. |
Compared with SMAJ10A and SMBJ10A, SMAJ10E3/TR13 delivers identical clamping performance in a RoHS-compliant, tape-and-reel-ready DO-214AC package-making it the preferred choice for modern SMT production targeting IEC61000-4-2/4-4/4-5 compliance without footprint or process changes.
Availability
SMAJ10E3/TR13 is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor node inputs, and telecom interface protection requiring stable component supply, full traceability, and long-term lifecycle assurance.
Supply support for SMAJ10E3/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for cost-effective, high-power transient suppression in surface-mount power and signal lines-targeting design-in across automotive, industrial automation, and communications infrastructure where robustness and standards compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ10E3/TR13 at its rated peak pulse current?
The SMAJ10E3/TR13 has a maximum clamping voltage (VC) of 18.8 V at 26.6 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures protected downstream ICs remain within their absolute maximum voltage ratings during surge events.
Is SMAJ10E3/TR13 RoHS compliant and what does the "e3" suffix indicate?
Yes, SMAJ10E3/TR13 is RoHS compliant-the "e3" suffix denotes annealed matte-tin plating per JEDEC J-STD-020B, fully compatible with lead-free reflow processes. The device meets exemption 7a (Pb in electronic ceramic parts) and carries full material declarations traceable to Microsemi's manufacturing lot records.
Can SMAJ10E3/TR13 be used for bidirectional transient protection?
No, SMAJ10E3/TR13 is a unidirectional TVS diode, identified by its cathode band marking and absence of "C" or "CA" in the part number. For bidirectional protection, Microsemi specifies parts like SMAJ10CA; using SMAJ10E3/TR13 on AC or dual-polarity lines would result in forward conduction and failure.
What is the thermal resistance specification for SMAJ10E3/TR13 and how does it affect layout?
SMAJ10E3/TR13 has a junction-to-lead thermal resistance (RθJL) of 15 °C/W. To maintain reliability during repetitive 500 W surges, the PCB must use the recommended DO-214AC pad layout with ≥1 oz copper pour connected to both terminals-reducing thermal impedance and preventing localized overheating at the die bond wire.
Does SMAJ10E3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ10E3/TR13 is validated for IEC61000-4-5 secondary lightning protection up to Class 4 (42 Ω source impedance) and Class 2 (12 Ω source impedance). Its 18.8 V clamping voltage at 26.6 A ensures protected circuits withstand 1 kV open-circuit test levels without functional interruption or parametric shift.
SMAJ10E3/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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 26.6A
- 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)
SMAJ10E3/TR13 FAQ
1.How can I place an order for SMAJ10E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10E3/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 SMAJ10E3/TR13 reliable?
The price and inventory of SMAJ10E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ10E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10E3/TR13?
SMAJ10E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10E3/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 SMAJ10E3/TR13?
For technical support, including SMAJ10E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10E3/TR13 requirements.
6.How does Aetrix verify that SMAJ10E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ10E3/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 SMAJ10E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ10E3/TR13?
All SMAJ10E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10E3/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 SMAJ10E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ10E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10E3/TR13 Tags
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