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Microchip Technology SMAJ9.0CAE3/TR13
- Part No.:
- SMAJ9.0CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CAE3/TR13.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,282
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Product details
Overview
SMAJ9.0CAE3/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 9.0 V reverse standoff voltage (VWM), 10.0 V minimum breakdown voltage (VBR), 16.9 V maximum clamping voltage (VC) at 29.5 A peak pulse current (IPP), 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 SMAJ9.0CAE3/TR13 datasheet, SMAJ9.0CAE3/TR13 pinout, SMAJ9.0CAE3/TR13 application, or SMAJ9.0CAE3/TR13 equivalent, this device delivers verified bidirectional clamping performance, RoHS-compliant matte-tin terminations, DO-214AC package compatibility, and IEC61000-4-2/4-4/4-5 compliance - critical for high-reliability board-level surge hardening without redesign.
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 sub-nanosecond suppression of fast-rising transients. Its silicon avalanche structure ensures stable clamping under repeated 500 W surges at 0.01% duty cycle, with thermal resistance of 15 °C/W junction-to-lead when mounted per recommended footprint.
The device meets IEC61000-4-5 Class 4 secondary lightning protection (42 Ω source) up to 9.0 V VWM, supports 100% avionics-grade screening (MA prefix option), and maintains ≤1 μA standby leakage at rated standoff voltage - essential for low-power sensor nodes and always-on control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V reverse standoff voltage - defines maximum continuous operating voltage before clamping initiates. |
| VBR min @ IBR | 10.0 V at 1 mA - guarantees reliable avalanche conduction onset across production lot. |
| VC @ IPP | 16.9 V at 29.5 A (10/1000 µs) - limits protected circuit voltage during worst-case surge. |
| PPP | 500 W peak pulse power - sustains single-event energy dissipation without degradation. |
| ID @ VWM | ≤1 μA max standby leakage - preserves battery life and avoids false triggering in high-impedance paths. |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for thermal and mechanical reliability. |
| RoHS | e3 suffix indicates RoHS-compliant matte-tin plating - compliant with JEDEC J-STD-020B Level 1 moisture sensitivity. |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy case, C-bend (modified J-bend) leads, cathode band omitted on bidirectional variants. Mounting requires FR4 PCB with 1 oz copper and specified pad layout (A=1.70–2.26 mm, B=3.99–4.50 mm, D=4.93–5.48 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Identical avalanche behavior in both directions - no polarity dependency; connects across protected line and ground or differential pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 500 W peak pulse rating | Handles IEC61000-4-5 42 Ω Class 4 surges (up to 9.0 V VWM) without failure or parameter shift. |
| <5 ns response time | Clamps ESD events (IEC61000-4-2 ±8 kV contact) before sensitive ICs experience overstress. |
| RoHS-compliant e3 finish | Matte-tin plating ensures solderability per MIL-STD-750 Method 2026 and eliminates lead-based contamination. |
| 100% HTRB screening option | MA-prefix variant undergoes 24-hour high-temperature reverse bias test - qualified for avionics (-55°C to +125°C). |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: 24 V DC input channels exposed to load dump and inductive switching in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed between input terminal and ground to clamp positive/negative transients before reaching protection diodes and interface ICs. Use Value: Limits voltage to ≤16.9 V during 29.5 A surges, preventing latch-up or gate oxide damage in downstream RS-485 transceivers and microcontrollers. |
Use Scenario: LIN bus lines and sensor supply rails subjected to ISO 7637-2 pulse 1/2a/3a in vehicle body electronics. IC Role / Device Role / Timing Role: Primary surge shunt on 12 V supply rail feeding door module MCUs and Hall-effect sensors. Use Value: Withstands 500 W pulses while maintaining <1 μA leakage - avoids battery drain and ensures fail-safe operation over 15-year service life. |
| Telecom Ethernet Port Protection | Medical Patient Monitor Interface |
|
Use Scenario: Secondary protection on 10/100BASE-TX PHY side after common-mode chokes in PoE-powered network equipment. IC Role / Device Role / Timing Role: Bidirectional clamping across differential pairs (MDI/MDIX) to suppress ESD and induced RF coupling. Use Value: Symmetric 16.9 V clamping ensures balanced voltage excursion - preserves signal integrity and prevents PHY reset during ±8 kV contact discharge. |
Use Scenario: ECG electrode inputs and USB host ports in portable diagnostic devices requiring IEC 60601-1-2 ESD immunity. IC Role / Device Role / Timing Role: Final-stage TVS on analog front-end and data lines to meet 15 kV air/8 kV contact discharge requirements. Use Value: Sub-5 ns response captures fast ESD transients before amplifiers saturate - maintains clinical signal fidelity and avoids false alarms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0CA | No "e3" RoHS suffix; tin-lead termination instead of matte-tin. | Not suitable for lead-free assembly or modern environmental compliance programs. | Select SMAJ9.0CAE3/TR13 for RoHS-compliant manufacturing; SMAJ9.0CA only if legacy tin-lead process is mandated. |
| SMBJ9.0CA-E3/52 | DO-214AA (SMB) package - larger footprint, 600 W rating, higher thermal mass. | Better suited for higher-energy surges but requires PCB layout change and increased board area. | Choose SMBJ9.0CA-E3/52 only when 600 W rating or enhanced thermal margin is required; SMAJ9.0CAE3/TR13 fits space-constrained designs. |
Compared with SMAJ9.0CA and SMBJ9.0CA-E3/52, the SMAJ9.0CAE3/TR13 uniquely balances RoHS compliance, DO-214AC space efficiency, and verified 500 W IEC61000-4-5 Class 4 capability - making it optimal for high-volume industrial and automotive PCBs where footprint, regulatory alignment, and repeatable surge performance are jointly critical.
Availability
SMAJ9.0CAE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom Ethernet port hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ9.0CAE3/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 consistent 500 W surge handling, low-leakage stability, and qualification-ready reliability for mission-critical power and signal lines.
FAQ
What does the "CA" suffix indicate in SMAJ9.0CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ9.0CAE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This differs from unidirectional "A" variants, which require correct anode/cathode orientation and only clamp in one direction. The CA construction enables simplified placement on AC-coupled or floating lines.
Is SMAJ9.0CAE3/TR13 compatible with lead-free reflow processes?
Yes, SMAJ9.0CAE3/TR13 uses RoHS-compliant matte-tin plating (e3 suffix) and is rated for solder temperatures up to 260 °C for 10 seconds - fully compatible with standard lead-free reflow profiles. Its DO-214AC package also meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating dry-pack requirements prior to assembly.
How does SMAJ9.0CAE3/TR13 perform under IEC61000-4-5 secondary lightning testing?
SMAJ9.0CAE3/TR13 is certified for IEC61000-4-5 Class 4 secondary lightning protection with 42 Ω source impedance - supporting up to 29.5 A peak pulse current at 16.9 V clamping voltage. This validates its ability to protect downstream circuitry from induced surges in building wiring and industrial plant environments without degradation.
What is the thermal resistance of SMAJ9.0CAE3/TR13, and how does it affect PCB layout?
SMAJ9.0CAE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W. To maintain reliability during repetitive surges, it must be mounted on FR4 with 1 oz copper using the recommended pad layout (A=1.70–2.26 mm, B=3.99–4.50 mm, D=4.93–5.48 mm). Inadequate copper area increases junction temperature and reduces surge endurance.
Can SMAJ9.0CAE3/TR13 replace SMAJ9.0A in a design?
No - SMAJ9.0CAE3/TR13 is bidirectional while SMAJ9.0A is unidirectional. Swapping them without circuit review risks improper clamping: SMAJ9.0A would block reverse current flow and may fail catastrophically if reverse polarity transients occur. Always verify polarity requirements and confirm bidirectional operation is intended before substitution.
SMAJ9.0CAE3/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):
- 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)
SMAJ9.0CAE3/TR13 FAQ
1.How can I place an order for SMAJ9.0CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CAE3/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 SMAJ9.0CAE3/TR13 reliable?
The price and inventory of SMAJ9.0CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CAE3/TR13?
SMAJ9.0CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CAE3/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 SMAJ9.0CAE3/TR13?
For technical support, including SMAJ9.0CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ9.0CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CAE3/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 SMAJ9.0CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CAE3/TR13?
All SMAJ9.0CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CAE3/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 SMAJ9.0CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ9.0CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CAE3/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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D5V0P1B2LP-7B
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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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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