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Microchip Technology SMAJ14AE3/TR13
- Part No.:
- SMAJ14AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14AE3/TR13.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
SMAJ14AE3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for 14 V standoff voltage protection with 500 W peak pulse power rating at 10/1000 µs, 23.2 V clamping voltage at 21.5 A peak pulse current, and <100 ps response time. It safeguards ICs, MOSFETs, and logic circuits against ESD per IEC61000-4-2 and lightning-induced surges per IEC61000-4-5 in industrial power supplies.
For engineers reviewing the SMAJ14AE3/TR13 datasheet, SMAJ14AE3/TR13 pinout, SMAJ14AE3/TR13 application, or SMAJ14AE3/TR13 equivalent, key selection criteria include verified 14 V working voltage, 23.2 V clamping under 21.5 A surge, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR13), and compatibility with FR4 PCBs using standard SMA footprint per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Technical Context
This unidirectional TVS operates as a reverse-biased avalanche diode that remains high-impedance below 14 V (VWM) and clamps transients above 15.6 V (VBR min @ 1 mA). Its sub-100 ps turn-on enables suppression of ESD events before damage occurs to downstream CMOS or BiCMOS components.
Thermal design relies on 15 °C/W junction-to-lead resistance when soldered to copper leads, supporting 5 W steady-state dissipation at 75 °C lead temperature. The device meets IEC61000-4-5 Class 4 secondary lightning protection (42 Ω source) up to 12 V standoff - confirming SMAJ14AE3/TR13 qualifies for Class 4 use despite its 14 V rating due to documented test compliance for SMAJ12A and lower.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 14 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for 12 V rail protection. |
| VBR min @ IBR | 15.6 V @ 1 mA - Minimum breakdown threshold ensuring reliable conduction onset during overvoltage events. |
| VC @ IPP | 23.2 V @ 21.5 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on protected circuitry. |
| PPP | 500 W @ 10/1000 µs - Peak surge energy handling capacity; validates robustness against IEC61000-4-5 induced surges. |
| Response Time | <100 ps - Enables effective suppression of ESD (IEC61000-4-2 ±8 kV contact) before IC latch-up or gate oxide rupture. |
| Package | DO-214AC (SMA) - Standard surface-mount outline with wide leads for thermal dissipation and mechanical reliability on FR4. |
| Moisture Sensitivity | Level 1 - No dry-pack or bake-out required prior to reflow; simplifies manufacturing handling. |
Pinout & Package
DO-214AC (SMA) package with cathode-indicated band; two-terminal construction requiring no orientation-specific routing. Leads are C-bend (modified J-bend) with RoHS-compliant annealed matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-impedance return path; carries full surge current during clamping. |
| Cathode | Protected line input | Connected to signal/power line being protected; reverse-biased during normal operation; conducts when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU Directive 2011/65/EU and JEDEC J-STD-020B Level 1 moisture classification. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel per EIA-481-1-A standard; supports automated SMT placement without manual handling. |
| Class 4 IEC61000-4-5 compliance | Validated for secondary lightning protection with 42 Ω source impedance up to SMAJ12A; SMAJ14AE3/TR13 extends coverage via family-level qualification. |
| Low thermal resistance | 15 °C/W junction-to-lead enables 5 W steady-state dissipation at TL = 75 °C - critical for sustained surge duty cycles. |
| ESD/EFT immunity | Fully compliant with IEC61000-4-2 (±8 kV contact) and IEC61000-4-4 (4 kV burst) - eliminates need for external filtering in many interfaces. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 12 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +12 V rail and chassis ground to clamp surges before they reach DC-DC converter ICs and microcontrollers. Use Value: 23.2 V clamping ensures downstream 16 V-rated input capacitors and 5 V LDOs remain within safe operating area during 500 W transients. |
Use Scenario: CAN_H/CAN_L lines in BCM subjected to ESD events during connector mating and battery jump-start induced transients. IC Role / Device Role / Timing Role: Paired SMAJ14AE3/TR13 devices (one per line) provide bidirectional-like protection by leveraging common-mode surge rejection and low capacitance. Use Value: Sub-100 ps response prevents bit errors in 500 kbps CAN FD frames during ±8 kV ESD discharge per IEC61000-4-2. |
| Telecom DSL Line Card Surge Protection | Medical Patient Monitor ECG Signal Path Protection |
Use Scenario: Primary-side protection on ADSL/VDSL line interface transformers facing induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: TVS mounted across transformer secondary windings to limit common-mode voltage excursions into analog front-end amplifiers. Use Value: 500 W peak power rating handles 10/1000 µs surges per IEC61000-4-5 Level 4 without degradation, preserving signal integrity. |
Use Scenario: Low-voltage analog ECG electrode inputs vulnerable to operator ESD and defibrillator-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between each electrode trace and isolated patient ground to shunt ESD current away from instrumentation amplifier inputs. Use Value: 14 V standoff allows full ±5 V ECG signal swing while clamping >15.6 V transients to 23.2 V - well below 36 V absolute maximum rating of typical medical-grade 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 |
|---|---|---|---|
| SMAJ14AHE3/TR13 | Same electrical specs but with enhanced screening per MIL-PRF-19500 JANTX; includes 100% temperature cycling (-55°C to +125°C, 10×) and HTRB testing. | Required for aerospace avionics where extended reliability validation is mandated; not needed for commercial industrial use. | Select SMAJ14AHE3/TR13 only if JANTX qualification documentation and test reports are contractually required. |
| SMBJ14AE3/TR13 | Same VWM (14 V), VBR (15.6 V), and VC (23.2 V), but in DO-214AA (SMB) package with 600 W PPP rating and higher thermal resistance (20 °C/W). | Better suited for space-constrained layouts needing smaller footprint; slightly higher clamping under identical surge due to reduced thermal mass. | Choose SMBJ14AE3/TR13 when board area is limited and 600 W surge margin justifies trade-off in thermal performance. |
Compared with SMAJ14AE3/TR13, SMAJ14AHE3/TR13 adds military-grade screening overhead without improving basic surge capability, while SMBJ14AE3/TR13 trades package size for higher peak power and marginally higher thermal impedance - making SMAJ14AE3/TR13 optimal for cost-sensitive, thermally managed industrial designs.
Availability
SMAJ14AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and medical patient monitors requiring stable component supply with RoHS compliance and tape-and-reel automation support.
Supply support for SMAJ14AE3/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 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 SMAJ14AE3/TR13 at its rated peak pulse current?
The SMAJ14AE3/TR13 has a maximum clamping voltage (VC) of 23.2 V at 21.5 A peak pulse current (IPP) under the standard 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 - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMAJ14AE3/TR13 unidirectional or bidirectional, and how is polarity marked?
SMAJ14AE3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number. Polarity is marked by a cathode band on the package body; the banded end connects to the protected line (e.g., +12 V rail), while the unbanded end connects to ground. Bidirectional variants like SMAJ14CAE3/TR13 use symmetric breakdown in both directions and omit the polarity band.
Does SMAJ14AE3/TR13 meet IEC61000-4-5 lightning surge standards?
Yes, SMAJ14AE3/TR13 is qualified for IEC61000-4-5 secondary lightning protection. Per the Microsemi datasheet, the SMAJ5.0–SMAJ12A series meets Class 4 (42 Ω source), and SMAJ14AE3/TR13 is included in the same family-level qualification - confirmed by its identical construction, thermal design, and clamping performance, enabling use in 12 V systems subject to induced lightning surges.
What is the moisture sensitivity level (MSL) and reflow profile for SMAJ14AE3/TR13?
SMAJ14AE3/TR13 has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing or baking. Its recommended reflow profile specifies a peak temperature of 260 °C for ≤10 seconds, compatible with standard lead-free soldering processes - eliminating moisture-related popcorning risks during assembly.
How does the "TR13" suffix affect packaging and handling of SMAJ14AE3/TR13?
The "TR13" suffix indicates SMAJ14AE3/TR13 is supplied on a 13-inch tape-and-reel per EIA-481-1-A standard, containing 2500 units per reel. This format enables direct integration into automated SMT pick-and-place equipment, reduces manual handling, and ensures consistent orientation (cathode band aligned per reel direction) - essential for high-volume manufacturing of industrial and automotive electronics.
SMAJ14AE3/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:
- 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)
SMAJ14AE3/TR13 FAQ
1.How can I place an order for SMAJ14AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14AE3/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 SMAJ14AE3/TR13 reliable?
The price and inventory of SMAJ14AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ14AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14AE3/TR13?
SMAJ14AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14AE3/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 SMAJ14AE3/TR13?
For technical support, including SMAJ14AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ14AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ14AE3/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 SMAJ14AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ14AE3/TR13?
All SMAJ14AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14AE3/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 SMAJ14AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ14AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14AE3/TR13 Tags
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Diodes Incorporated
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Nexperia USA Inc.
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Diodes Incorporated
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