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Microchip Technology SMAJ13AE3/TR13
- Part No.:
- SMAJ13AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13AE3/TR13.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
SMAJ13AE3/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 13 V reverse standoff voltage (VWM), 14.4 V minimum breakdown voltage (VBR), 21.5 V maximum clamping voltage (VC) at 23.2 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies and automotive control modules.
For engineers reviewing the SMAJ13AE3/TR13 datasheet, SMAJ13AE3/TR13 pinout, SMAJ13AE3/TR13 application, or SMAJ13AE3/TR13 equivalent, this page delivers verified electrical parameters, DO-214AC package integration guidance, IEC61000-4-2/4-4/4-5 compliance context, and real-world substitution options for ESD/EFT/lightning surge protection design.
Technical Context
This unidirectional TVS diode operates with <100 ps theoretical response time and clamps transients before downstream ICs experience damaging overvoltage. Its 1.56 W steady-state power dissipation at 25 °C and 5 W at 75 °C lead temperature enables reliable operation on FR4 PCBs with recommended footprint.
The device meets IEC61000-4-2 (±8 kV contact / ±15 kV air ESD), IEC61000-4-4 (4 kV EFT), and IEC61000-4-5 secondary lightning surge immunity (Class 4 at 12 Ω source impedance, Class 1–4 at 42 Ω). Polarity is marked by cathode band; RoHS-compliant matte-tin plating ensures solderability per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for protected line voltage. |
| VBR min @ IBR | 14.4 V @ 1 mA - Minimum voltage at which device enters avalanche conduction; defines turn-on threshold under transient stress. |
| VC @ IPP | 21.5 V @ 23.2 A - Clamped voltage during 10/1000 µs surge; determines maximum stress seen by downstream circuitry. |
| PPP | 500 W - Peak pulse power handling capability; validates robustness against fast, high-energy transients. |
| IPP | 23.2 A - Peak surge current supported at rated clamping voltage; used to size PCB trace width and ground path. |
| TJ range | −65 °C to +150 °C - Operating and storage junction temperature range; supports deployment in under-hood automotive and industrial environments. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for thermal dissipation and low-inductance surge path to ground. |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy body (UL94V-0), C-bend (modified J-bend) leads, matte-tin plating, cathode indicated by band. Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance return node; carries full surge current during clamping. |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12 V rail); polarity marking ensures correct orientation for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables single-device protection against severe IEC61000-4-5 surges without cascaded stages. |
| <100 ps theoretical response time | Clamps ESD events faster than most microcontroller I/O structures can be damaged. |
| RoHS-compliant "e3" suffix | Meets global environmental regulations without performance trade-offs; matte-tin plating ensures reflow compatibility. |
| 100% screening option (MA prefix) | Supports avionics-grade reliability with −55 °C to +125 °C temperature cycling (10×), HTRB, and surge testing. |
| IEC61000-4-5 Class 4 compliance (12 Ω source) | Validated for secondary lightning protection in telecom and industrial field equipment with stringent surge margins. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: 12 V battery-supplied ECUs exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and local regulator to clamp positive-going surges before LDO or MCU damage. Use Value: 21.5 V clamping ensures regulated 5 V/3.3 V logic remains within safe absolute maximum ratings during 23.2 A surge events. |
Use Scenario: 24 V digital input channels in programmable logic controllers subject to field-wiring EFT and inductive kickback. IC Role / Device Role / Timing Role: Front-end TVS on optocoupler input side to absorb repetitive 4 kV EFT bursts per IEC61000-4-4. Use Value: Sub-100 ps response prevents latch-up in upstream interface ICs while maintaining signal integrity during normal operation. |
| Telecom Line Interface | Medical Equipment Power Entry |
Use Scenario: Secondary-side DC power distribution in PoE-powered network switches. IC Role / Device Role / Timing Role: Point-of-load TVS on 48 V to 12 V conversion stage to suppress coupled lightning-induced transients. Use Value: 500 W rating handles multiple 10/1000 µs surges without degradation, supporting long-term field reliability. |
Use Scenario: AC/DC adapter output filtering in Class II medical devices requiring reinforced isolation and low leakage. IC Role / Device Role / Timing Role: Final-stage TVS on isolated 5 V/12 V outputs to meet IEC60601-1 creepage/clearance and surge immunity requirements. Use Value: 1 μA max standby current at 13 V avoids compromising low-power standby modes in battery-backed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13AHE3/TR13 | Same electrical specs; "H" suffix indicates high-reliability screening per MIL-PRF-19500 JANTX level. | Required for aerospace/military designs needing extended temperature cycling and surge validation. | Select when qualification to MIL-PRF-19500 or avionics-grade screening is mandated - not needed for commercial industrial use. |
| SMBJ13A-E3/52 | DO-214AA (SMB) package; same VWM/VBR/VC, but lower 600 W PPP rating and higher thermal resistance (junction-to-ambient). | Better suited for space-constrained layouts where footprint area is prioritized over thermal margin. | Choose only if board layout cannot accommodate SMA's larger pad area; verify thermal derating at 75 °C ambient. |
Compared with SMAJ13AE3/TR13, SMAJ13AHE3/TR13 adds military-grade screening without altering electrical behavior, while SMBJ13A-E3/52 trades package size for reduced surge margin and thermal performance - making SMAJ13AE3/TR13 the optimal balance of robustness, manufacturability, and cost for general-purpose industrial protection.
Availability
SMAJ13AE3/TR13 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power systems, and medical device power entry circuits requiring stable component supply across multi-year production cycles.
Supply support for SMAJ13AE3/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 ruggedized transient suppression in harsh environments - delivering consistent 500 W surge handling, low clamping, and extended temperature operation without derating compromises.
FAQ
What is the clamping voltage of SMAJ13AE3/TR13 at its rated peak pulse current?
The SMAJ13AE3/TR13 has a maximum clamping voltage (VC) of 21.5 V at 23.2 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 SMAJ13AE3/TR13 unidirectional or bidirectional, and how is polarity identified?
SMAJ13AE3/TR13 is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AC package body. The "A" in the part number denotes unidirectional configuration, distinguishing it from bidirectional variants (e.g., SMAJ13CAE3/TR13) that omit the band and conduct in both directions. Correct orientation is essential: cathode connects to the protected line, anode to ground.
Does SMAJ13AE3/TR13 comply with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ13AE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. It achieves Class 4 immunity at 12 Ω and Class 1–4 at 42 Ω, as specified in the Microsemi MSC0270A datasheet. This makes SMAJ13AE3/TR13 suitable for telecom, industrial, and medical equipment requiring certified surge resilience.
What is the maximum steady-state power dissipation of SMAJ13AE3/TR13 on a standard FR4 PCB?
When mounted on an FR4 PCB with 1 oz copper and the recommended footprint, SMAJ13AE3/TR13 dissipates up to 1.56 W at 25 °C ambient temperature and 5 W at 75 °C lead temperature (TL). These values derive from its thermal resistance of 80 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation without forced cooling in typical industrial enclosures.
Can SMAJ13AE3/TR13 replace SMAJ13A in existing designs without layout changes?
Yes, SMAJ13AE3/TR13 is a direct drop-in replacement for SMAJ13A - sharing identical DO-214AC package dimensions, pinout, and electrical specifications. The "e3" suffix confirms RoHS compliance with matte-tin plating, and "TR13" denotes tape-and-reel packaging (2500 units per 13-inch reel), requiring no PCB or schematic modifications for migration from legacy non-RoHS versions.
SMAJ13AE3/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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 23.2A
- 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)
SMAJ13AE3/TR13 FAQ
1.How can I place an order for SMAJ13AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13AE3/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 SMAJ13AE3/TR13 reliable?
The price and inventory of SMAJ13AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ13AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13AE3/TR13?
SMAJ13AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13AE3/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 SMAJ13AE3/TR13?
For technical support, including SMAJ13AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ13AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ13AE3/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 SMAJ13AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ13AE3/TR13?
All SMAJ13AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13AE3/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 SMAJ13AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ13AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13AE3/TR13 Tags
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