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Microchip Technology SMAJ9.0AE3/TR13
- Part No.:
- SMAJ9.0AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0AE3/TR13.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
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Product details
Overview
SMAJ9.0AE3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for primary overvoltage protection of DC power rails and signal lines. It features a 9.0 V reverse standoff voltage (VWM), 10.0 V minimum breakdown voltage (VBR) at 1 mA, 15.4 V maximum clamping voltage (VC) at 32.6 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supplies, automotive control modules, and Ethernet PHY interfaces.
For engineers reviewing the SMAJ9.0AE3/TR13 datasheet, SMAJ9.0AE3/TR13 pinout, SMAJ9.0AE3/TR13 application, or SMAJ9.0AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 secondary lightning surge (42 Ω source), low standby leakage (<5 µA @ VWM), RoHS-compliant matte-tin plating, and DO-214AC package compatibility with standard SMT reflow profiles.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to clamp the line within nanoseconds. Its unidirectional polarity (cathode band marked) enables asymmetric protection on positive-rail applications without reverse conduction path concerns.
Designed for 10/1000 µs surge waveforms, it delivers 32.6 A peak pulse current capability while maintaining VC ≤ 15.4 V-critical for safeguarding 3.3 V and 5 V logic interfaces downstream of LDOs or DC-DC converters. Thermal resistance is 15 °C/W junction-to-lead when soldered per recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets operating margin above 5 V or 9 V nominal rails. |
| VBR min @ IBR | 10.0 V @ 1 mA - Minimum avalanche onset voltage; ensures reliable triggering before downstream IC damage thresholds. |
| VC @ IPP | 15.4 V @ 32.6 A - Clamped voltage during full 500 W surge; must stay below absolute max ratings of protected ICs. |
| PPP | 500 W @ 10/1000 µs - Peak surge energy handling capacity; validated per IEC61000-4-5 Class 4 (12 Ω source) and Class 3 (42 Ω source). |
| ID @ VWM | <5 µA - Ultra-low leakage current at rated standoff; avoids loading sensitive analog or battery-backed circuits. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for thermal dissipation and mechanical robustness. |
| RoHS | e3 suffix - Matte-tin plating compliant with JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy body (UL94V-0), C-bend leads with matte-tin plating, cathode indicated by band. Weight: 0.064 g. Recommended pad layout per Microsemi MSC0270A Rev L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; carries full surge current during clamping event. |
| Cathode | Protected line connection | Connected to input rail or signal line; voltage referenced to anode; marked by band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables single-device protection against IEC61000-4-5 42 Ω Class 3 surges (1 kV) on 9 V systems without derating. |
| <100 ps theoretical response | Clamps ESD transients (IEC61000-4-2 ±8 kV contact) before logic gate oxide breakdown occurs. |
| 15 °C/W junction-to-lead RθJL | Supports sustained 5 W steady-state dissipation at 75 °C lead temperature-critical for high-ambient industrial environments. |
| Unidirectional construction | Prevents reverse conduction on negative-going transients; eliminates need for series blocking diode in DC rail protection. |
| Tape-and-reel packaging | TR13 suffix indicates 2500 units per 13-inch reel per EIA-481-1-A-optimized for automated SMT placement. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 9 V auxiliary rail in programmable logic controller (PLC) power stage exposed to relay coil flyback and hot-swap inrush. IC Role / Device Role / Timing Role: Shunt TVS placed between +9 V input and chassis ground, triggered within <100 ps to limit transient overshoot to ≤15.4 V. Use Value: Prevents latch-up in downstream 9 V LDO regulators and microcontroller I/O pins during 100 V/500 ns inductive spikes. | Use Scenario: LIN bus transceiver power input subjected to load-dump and jump-start events per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC line upstream of LIN transceiver IC; coordinates with ceramic capacitor for sub-µs response. Use Value: Maintains VCC below 16 V during 35 V/400 ms load dump, ensuring transceiver remains functional without reset or damage. |
| Telecom DSL Line Interface | Medical Patient Monitor Signal Input |
Use Scenario: Protection of ADSL line driver outputs against induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional SMAJ9.0AE3/TR13 applied on DC bias rail only, paired with series impedance. Use Value: Limits clamped voltage to 15.4 V during 1 kV/42 Ω IEC61000-4-5 surge-within safe operating area of 24 V-rated line drivers. | Use Scenario: ESD protection on analog front-end inputs (ECG, SpO₂) where leakage current must remain below 100 nA to avoid measurement drift. IC Role / Device Role / Timing Role: First-stage shunt protector on sensor signal path; placed immediately after connector, before instrumentation amplifier. Use Value: Delivers <5 µA standby leakage at 9 V bias-preserving nanoamp-level input bias current integrity of precision op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0AHE3/TR13 | Same electrical specs; "H" denotes halogen-free epoxy package per IEC61249-2-21. | No difference in surge protection function; required only where halogen-free compliance is mandated by end-equipment standards. | Select SMAJ9.0AHE3/TR13 if RoHS + halogen-free certification is contractually required; otherwise SMAJ9.0AE3/TR13 suffices. |
| SMCJ9.0A-E3/57T | Higher 1500 W PPP; DO-214AB (SMC) package; 17.0 V VC @ 88.2 A; same VWM/VBR. | Used where higher surge margin is needed (e.g., outdoor telecom enclosures); requires larger PCB footprint and different thermal design. | Choose SMCJ9.0A-E3/57T only when 500 W is insufficient; SMAJ9.0AE3/TR13 remains optimal for space-constrained 9 V rail protection. |
Compared with SMAJ9.0AHE3/TR13, the SMAJ9.0AE3/TR13 offers identical clamping and leakage but lacks halogen-free certification; versus SMCJ9.0A-E3/57T, it trades lower surge rating for 40% smaller footprint and better thermal coupling in dense layouts.
Availability
SMAJ9.0AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, and medical patient monitor signal inputs requiring stable component supply across multi-year production cycles.
Supply support for SMAJ9.0AE3/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 space-constrained, high-surge environments-emphasizing fast response, repeatable clamping, and robust thermal performance in DO-214AC packages.
FAQ
What is the clamping voltage of the SMAJ9.0AE3/TR13 under a 10/1000 µs surge?
The SMAJ9.0AE3/TR13 has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 32.6 A under the standardized 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SMAJ9.0AE3/TR13 unidirectional or bidirectional?
The SMAJ9.0AE3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only when the cathode is biased positively relative to the anode, making it suitable for DC rail protection where reverse voltage is not expected. Polarity is marked by a cathode band on the DO-214AC package body.
Does the SMAJ9.0AE3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, the SMAJ9.0AE3/TR13 is rated for secondary lightning surge protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. At 42 Ω, it supports Class 3 (1 kV) testing; at 12 Ω, it supports Class 2 (1 kV). Its 500 W peak pulse power and 15.4 V clamping ensure compliance when implemented with proper PCB layout and series impedance.
What is the maximum steady-state power dissipation of the SMAJ9.0AE3/TR13?
The SMAJ9.0AE3/TR13 dissipates up to 5 W continuously when the lead temperature (TL) is maintained at 75 °C, or 1.56 W at ambient temperature (TA) of 25 °C on a standard FR4 board with 1 oz copper and Microsemi's recommended footprint. This rating assumes proper thermal relief and solder joint integrity per IPC-7351 guidelines.
What does the "TR13" suffix indicate in SMAJ9.0AE3/TR13?
"TR13" denotes tape-and-reel packaging: 2500 units per 13-inch reel conforming to EIA-481-1-A standards. This format enables automated pick-and-place assembly and ensures consistent orientation (cathode band aligned) during SMT processing. The "e3" portion confirms RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1.
SMAJ9.0AE3/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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 32.6A
- 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)
SMAJ9.0AE3/TR13 FAQ
1.How can I place an order for SMAJ9.0AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0AE3/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 SMAJ9.0AE3/TR13 reliable?
The price and inventory of SMAJ9.0AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0AE3/TR13?
SMAJ9.0AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0AE3/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 SMAJ9.0AE3/TR13?
For technical support, including SMAJ9.0AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ9.0AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0AE3/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 SMAJ9.0AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0AE3/TR13?
All SMAJ9.0AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0AE3/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 SMAJ9.0AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ9.0AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0AE3/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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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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