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Microchip Technology SMAJ14E3/TR13
- Part No.:
- SMAJ14E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14E3/TR13.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
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Product details
Overview
SMAJ14E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 14 V working standoff voltage (VWM), 15.6 V minimum breakdown voltage (VBR), and 25.8 V maximum clamping voltage (VC) at 19.4 A peak pulse current - deployed for ESD/EFT protection on DC power rails and I/O lines of industrial controllers.
For engineers reviewing the SMAJ14E3/TR13 datasheet, SMAJ14E3/TR13 pinout, SMAJ14E3/TR13 application, or SMAJ14E3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-2/4-4 stress, thermal resistance (15 °C/W junction-to-lead), RoHS-compliant matte-tin plating, and compatibility with standard 12 mm tape-and-reel handling (750 pcs/reel).
Technical Context
This TVS operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds VBR = 15.6 V (at IBR = 1 mA), clamping transients to ≤25.8 V within <100 ps response time. It sustains 500 W peak pulse power at 25 °C with 0.01% duty cycle and exhibits 1 μA max standby leakage at VWM = 14 V.
Thermal design relies on low junction-to-lead resistance (15 °C/W) and FR4 board mounting with recommended footprint; steady-state dissipation is 5 W at lead temperature (TL) = 75 °C. Its void-free epoxy case meets UL94V-0, and terminals use annealed matte-tin plating per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; sets safe DC rail margin for 12 V systems. |
| VBR min @ IBR | 15.6 V @ 1 mA - Minimum voltage at which avalanche breakdown initiates; defines turn-on threshold tolerance. |
| VC @ IPP | 25.8 V @ 19.4 A - Clamped voltage during 10/1000 µs surge; determines protected IC's maximum transient exposure. |
| PPP | 500 W - Peak pulse power rating at 25 °C; validates compliance with IEC61000-4-5 Class 4 (12 Ω source) secondary lightning. |
| ID @ VWM | 1 μA - Reverse leakage at standoff voltage; ensures negligible standby power loss in battery-powered circuits. |
| tRESPONSE | <100 ps - Theoretical response time from 0 V to VBR; enables effective suppression of ESD events per IEC61000-4-2 Level 4 (15 kV contact). |
| TJ Range | –65 °C to +150 °C - Operating and storage temperature range; supports deployment in automotive engine compartments and industrial enclosures. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode-indicating band; C-bend (modified J-bend) leads, void-free thermosetting epoxy body meeting UL94V-0; weight: 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; carries full surge current during clamping. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V rail); polarity-marked by band per JEDEC DO-214AC. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required. |
| 500 W peak pulse rating | Validated at 10/1000 µs waveform; supports IEC61000-4-5 Class 4 (12 Ω source) secondary lightning immunity. |
| Fast clamping response | <100 ps theoretical rise-to-breakdown; critical for sub-nanosecond ESD event capture before IC damage. |
| Low thermal resistance | 15 °C/W junction-to-lead; enables reliable power derating on standard FR4 PCBs with recommended pad layout. |
| Unidirectional configuration | Single-polarity clamping ideal for DC power rail protection where reverse voltage blocking is required. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V CAN/LIN bus interfaces and digital input channels exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching MCU GPIO or level translators. Use Value: Limits voltage excursion to ≤25.8 V during 19.4 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. | Use Scenario: 12 V power distribution networks supplying sensors, relays, and LED drivers in passenger compartments. IC Role / Device Role / Timing Role: Primary overvoltage protector on fused 12 V feed lines, positioned upstream of LDOs and PMICs. Use Value: Withstands 500 W surges while maintaining 1 μA leakage at 14 V, minimizing quiescent current drain in always-on modules. |
| Telecom Power Supply Input | Medical Diagnostic Equipment Front-End |
Use Scenario: Secondary-side 12 V/24 V DC-DC outputs feeding baseband processors and RF front-ends. IC Role / Device Role / Timing Role: Final-stage transient guard before sensitive analog-to-digital converters and clock buffers. Use Value: Clamps EFT bursts (IEC61000-4-4) to 25.8 V within <100 ps, preserving signal integrity and timing margins in high-resolution ADC sampling. | Use Scenario: Patient-connected sensor interface boards requiring reinforced isolation and low-leakage protection. IC Role / Device Role / Timing Role: Isolation barrier-side TVS on analog front-end supply rails (e.g., ±15 V op-amp supplies). Use Value: UL94V-0 epoxy housing and 150 °C max operating temperature support compliance with IEC60601-1 creepage/clearance and thermal safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A (Vishay) | Identical VWM = 14 V, VBR = 15.6 V min, VC = 25.8 V @ 19.4 A; same DO-214AC package and RoHS plating. | No functional difference; validated for identical IEC61000-4-2/4-4/4-5 test profiles. | Select based on distributor stock and traceability requirements; both meet MIL-PRF-19500 screening options with MX prefix. |
| 1.5SMC14A (ON Semiconductor) | VWM = 14 V, but VC = 23.2 V @ 21.5 A; higher IPP rating but slightly lower clamping voltage; same DO-214AB package (mechanically compatible, minor footprint variance). | Better clamping margin for ultra-sensitive 3.3 V logic, but requires verification of pad layout compatibility due to DO-214AB vs. DO-214AC leadform. | Prefer when tighter clamping (<23.2 V) is prioritized and board layout allows DO-214AB footprint; not drop-in for existing SMAJ land patterns. |
Compared with SMAJ14E3/TR13, SMAJ14A-E3/5A offers identical electrical and mechanical specs for seamless substitution, while 1.5SMC14A provides lower clamping at the cost of non-identical package geometry - requiring layout review before replacement.
Availability
SMAJ14E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, consistent RoHS compliance, and verified IEC61000-4-5 Class 4 surge immunity.
Supply support for SMAJ14E3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing ruggedness, long-term availability, and extended temperature operation.
The SMAJ series targets surface-mount transient suppression in harsh environments, with focus on fast-response, high-power clamping for IEC-compliant system-level ESD, EFT, and lightning surge protection.
FAQ
What is the clamping voltage of SMAJ14E3/TR13 under a 10/1000 µs surge?
The SMAJ14E3/TR13 clamps to a maximum of 25.8 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 19.4 A. This value is measured per Figure 2 in the official Microsemi datasheet MSC0270A and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is SMAJ14E3/TR13 unidirectional or bidirectional?
SMAJ14E3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number. It conducts only in reverse bias above VBR, with cathode marked by a band; it does not suppress positive-going transients on AC lines or bidirectional data buses without additional circuitry.
What package type does SMAJ14E3/TR13 use, and is it compatible with standard reflow profiles?
SMAJ14E3/TR13 uses the DO-214AC (SMA) surface-mount package with C-bend leads and RoHS-compliant matte-tin plating. It supports standard lead-free reflow per JEDEC J-STD-020, with maximum solder temperature of 260 °C for 10 seconds - fully compatible with automated SMT assembly lines.
Does SMAJ14E3/TR13 meet IEC61000-4-5 Class 4 lightning surge requirements?
Yes, SMAJ14E3/TR13 meets IEC61000-4-5 Class 4 for secondary lightning protection when tested with a 12 Ω source impedance, as confirmed in the Microsemi datasheet MSC0270A. Its 500 W peak pulse rating and 25.8 V clamping enable compliance up to 12 A short-circuit current in this configuration.
What is the maximum steady-state power dissipation for SMAJ14E3/TR13 on a standard FR4 PCB?
When mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended footprint, SMAJ14E3/TR13 dissipates up to 5 W continuously at a lead temperature (TL) of 75 °C, or 1.56 W at ambient temperature (TA) of 25 °C - values derived from its thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient.
SMAJ14E3/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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- 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)
SMAJ14E3/TR13 FAQ
1.How can I place an order for SMAJ14E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14E3/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 SMAJ14E3/TR13 reliable?
The price and inventory of SMAJ14E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ14E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14E3/TR13?
SMAJ14E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14E3/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 SMAJ14E3/TR13?
For technical support, including SMAJ14E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14E3/TR13 requirements.
6.How does Aetrix verify that SMAJ14E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ14E3/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 SMAJ14E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ14E3/TR13?
All SMAJ14E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14E3/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 SMAJ14E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ14E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14E3/TR13 Tags
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