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Microchip Technology SMAJ14CAE3/TR13
- Part No.:
- SMAJ14CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14CAE3/TR13.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
SMAJ14CAE3/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 14 V standoff voltage (VWM), 25.8 V clamping voltage (VC) at 19.4 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies, automotive body electronics, and telecom interface circuits.
For engineers reviewing the SMAJ14CAE3/TR13 datasheet, SMAJ14CAE3/TR13 pinout, SMAJ14CAE3/TR13 application, or SMAJ14CAE3/TR13 equivalent, key selection considerations include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin terminations with tape-and-reel delivery (TR13).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown occurring at ≥15.6 V in either direction when tested at 1 mA. Its sub-5 ns response time enables effective suppression of fast transients including ESD events (±8 kV contact, ±15 kV air per IEC61000-4-2) and electrical fast transients (4 kV per IEC61000-4-4).
Rated for operation from –65 °C to +150 °C, it delivers 500 W peak pulse power into a 10/1000 µs waveform while maintaining ≤1 µA standby leakage at 14 V, and exhibits 15 °C/W junction-to-lead thermal resistance when soldered to recommended FR4 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V maximum reverse standoff voltage - defines max continuous DC or RMS operating voltage before conduction begins |
| VBR min | 15.6 V at IBR = 1 mA - ensures reliable turn-on margin above VWM for bidirectional protection |
| VC @ IPP | 25.8 V at 19.4 A (10/1000 µs) - limits downstream voltage stress during worst-case surge |
| PPP | 500 W peak pulse power - supports high-energy surge handling without failure under standard test conditions |
| ID @ VWM | ≤1 µA - negligible leakage current preserves low-power circuit integrity and battery life |
| TJ Range | –65 °C to +150 °C - enables deployment in under-hood automotive, industrial control, and outdoor telecom environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for thermal dissipation and mechanical reliability |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant annealed matte-tin plating, cathode band omitted on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | No polarity marking; terminals interchangeable - provides identical clamping in both directions |
| Case / Body | Thermal and mechanical interface | Non-electrical; wide lead geometry enhances heat transfer to PCB copper for sustained surge duty |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| IEC61000-4-5 Class 4 support | Withstands 42 Ω source impedance lightning surges up to 12 V VWM - SMAJ14CAE3/TR13 qualifies for Class 4 (12 V range) per spec |
| RoHS-compliant "e3" termination | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required |
| 500 W 10/1000 µs rating | Validated energy-handling capability exceeds typical board-level surge requirements in industrial and telecom applications |
| Fast response time | <5 ns clamping onset - captures sub-microsecond transients before sensitive ICs experience overstress |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 12 V DC input rail of programmable logic controllers exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed upstream of DC-DC converter input to clamp surges before regulation stage. Use Value: Limits transient voltage to 25.8 V, preventing damage to 36 V-rated input stages and ensuring system uptime in factory automation environments. |
Use Scenario: LIN bus transceiver power supply line subject to battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail of LIN PHY IC, operating alongside fuse and reverse-polarity protection. Use Value: Withstands 500 W surges without degradation, enabling compliance with ISO 7637-2 Pulse 1/2a/3a and extending BCM field life. |
| Telecom Ethernet Port Protection | Medical Sensor Interface Line |
|
Use Scenario: Secondary-side 48 V PoE power line feeding Ethernet PHY, vulnerable to induced RF and lightning coupling. IC Role / Device Role / Timing Role: Bidirectional TVS on isolated DC output of PoE PD controller, coordinated with common-mode chokes. Use Value: Clamps 42 Ω IEC61000-4-5 surges to safe levels while adding <1 pF capacitance per terminal - avoids signal integrity impact on 100BASE-TX. |
Use Scenario: Analog front-end of patient-connected ECG amplifier, requiring ultra-low leakage and biocompatible reliability. IC Role / Device Role / Timing Role: Final-stage transient guard on sensor bias line, placed after isolation barrier and before instrumentation amplifier inputs. Use Value: Delivers ≤1 µA leakage at 14 V and –65 °C to +150 °C operation - maintains diagnostic accuracy and meets IEC 60601-1-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA TR13 (non-e3) | Same electrical specs and DO-214AC package; lead-free matte-tin plating replaced by SnPb termination | Not suitable for RoHS-compliant production; requires exemption documentation for legacy programs | Select only if SnPb assembly process is mandated and environmental compliance is waived |
| SMBJ14CA-E3/52 | Higher 600 W rating, SMB (DO-214AA) package - 20% larger footprint, 25% higher thermal resistance (20 °C/W) | Better surge margin but incompatible PCB layout; requires redesign for space-constrained designs | Choose when 500 W margin is insufficient and board area allows SMB footprint |
Compared with SMAJ14CAE3/TR13, the non-RoHS SMAJ14CA TR13 offers identical protection with SnPb solder compatibility, while SMBJ14CA-E3/52 trades compactness for higher power handling - making SMAJ14CAE3/TR13 optimal for RoHS-compliant, space-constrained 12 V rail protection where 500 W suffices.
Availability
SMAJ14CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom Ethernet port protection, and medical sensor interface lines requiring stable component supply and full RoHS compliance.
Supply support for SMAJ14CAE3/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-environment electronics, emphasizing robust surge handling, wide temperature operation, and qualification-ready packaging for mission-critical systems.
FAQ
What does the "CA" suffix indicate in SMAJ14CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ14CAE3/TR13 clamps transient voltages symmetrically in both polarities, unlike unidirectional "A" variants that conduct only in reverse bias. This makes SMAJ14CAE3/TR13 ideal for AC-coupled or floating signal paths where polarity is undefined or reversible.
Is SMAJ14CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ14CAE3/TR13 is rated for IEC61000-4-5 secondary lightning protection with 42 Ω source impedance up to Class 4 (covers VWM ≤12 V). While its 14 V VWM falls just outside Class 4, it remains valid for Class 3 (VWM ≤24 V) and widely deployed in 12 V systems meeting full IEC61000-4-5 immunity requirements.
What is the thermal resistance of SMAJ14CAE3/TR13, and how does it affect layout?
SMAJ14CAE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W. To maintain reliability during repeated surges, the PCB footprint must follow Microsemi's recommended pad layout (Page 5 of datasheet) - using ≥1 oz copper, thermal reliefs, and adequate copper pour under the leads to dissipate heat effectively without exceeding 150 °C junction temperature.
Does SMAJ14CAE3/TR13 require moisture-sensitive device (MSD) handling?
No - SMAJ14CAE3/TR13 is rated IPC/JEDEC J-STD-020B Level 1, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow. The "e3" RoHS-compliant matte-tin plating and void-free epoxy body ensure robust moisture resistance for standard SMT assembly processes.
How does the clamping voltage of SMAJ14CAE3/TR13 compare to its breakdown voltage?
SMAJ14CAE3/TR13 has a minimum breakdown voltage (VBR) of 15.6 V at 1 mA and a maximum clamping voltage (VC) of 25.8 V at 19.4 A (10/1000 µs). This 10.2 V differential represents the dynamic voltage rise under surge - a critical design margin that ensures protected ICs see no more than 25.8 V even during worst-case 500 W transients.
SMAJ14CAE3/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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 21.5A
- 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)
SMAJ14CAE3/TR13 FAQ
1.How can I place an order for SMAJ14CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14CAE3/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 SMAJ14CAE3/TR13 reliable?
The price and inventory of SMAJ14CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ14CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14CAE3/TR13?
SMAJ14CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14CAE3/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 SMAJ14CAE3/TR13?
For technical support, including SMAJ14CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ14CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ14CAE3/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 SMAJ14CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ14CAE3/TR13?
All SMAJ14CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14CAE3/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 SMAJ14CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ14CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14CAE3/TR13 Tags
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