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Microchip Technology SMAJ15AE3/TR13
- Part No.:
- SMAJ15AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15AE3/TR13.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,238
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Product details
Overview
SMAJ15AE3/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 15 V working peak standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), 24.4 V maximum clamping voltage (VC) at 20.6 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supply input stages and automotive body control modules.
For engineers reviewing the SMAJ15AE3/TR13 datasheet, SMAJ15AE3/TR13 pinout, SMAJ15AE3/TR13 application, or SMAJ15AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 secondary lightning surge (42 Ω source), unidirectional polarity marking, RoHS-compliant matte-tin plating, and DO-214AC package compatibility with standard SMT reflow profiles.
Technical Context
This TVS diode operates as a fast-acting shunt clamp, triggered when reverse voltage exceeds VBR = 16.7 V (at IBR = 1 mA), limiting transient energy to protected circuitry via low-impedance path to ground. Its <100 ps theoretical response time enables effective suppression of ESD per IEC61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and EFT per IEC61000-4-4.
The device is rated for continuous operation from –65 °C to +150 °C, with thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 board (1 oz Cu). Its 0.064 g mass and DO-214AC outline support high-density PCB layouts while maintaining robust surge handling up to 40 A forward surge (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line's nominal DC voltage. |
| VBR min @ IBR | 16.7 V @ 1 mA - Minimum voltage at which avalanche conduction initiates; ensures reliable triggering above system operating margin. |
| VC @ IPP | 24.4 V @ 20.6 A - Maximum clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream ICs. |
| PPP | 500 W - Peak pulse power dissipation capability; validates suitability for IEC61000-4-5 Class 4 (42 Ω source) lightning surges. |
| ID @ VWM | 1 µA - Reverse leakage current at 15 V; negligible loading on 12–15 V supply rails during normal operation. |
| tclamp | <100 ps - Theoretical response time from 0 V to VBR; enables protection against nanosecond-scale ESD events. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with C-bend leads; compatible with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity. |
Pinout & Package
DO-214AC (SMA) package with cathode-indicated band; two-terminal unidirectional configuration. Void-free thermosetting epoxy case (UL94V-0), matte-tin plated leads solderable per MIL-STD-750 Method 2026. Recommended footprint per Microsemi MSC0270A Rev L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., 12 V rail); carries surge current into device during clamping. |
| Cathode | Ground reference | Connected to system ground plane; provides low-impedance return path for transient energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU; eliminates lead-based solder compatibility concerns. |
| Tape-and-reel packaging | TR13 suffix indicates 13-inch reel (2500 pcs); supports automated SMT placement without manual handling. |
| IEC61000-4-5 compliance | Validated for secondary lightning protection up to Class 4 (42 Ω source) with VC ≤ 24.4 V at 20.6 A. |
| Low thermal resistance | 15 °C/W junction-to-lead enables sustained 5 W steady-state power dissipation at TL = 75 °C. |
| ESD/EFT immunity | Fully compliant with IEC61000-4-2 (±15 kV air) and IEC61000-4-4 (4 kV burst) standards out-of-the-box. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
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 shunt TVS placed between VIN and GND to clamp surges before they reach DC/DC converter ICs. Use Value: Limits transient voltage to ≤24.4 V, preventing damage to 36 V-rated input capacitors and enabling compliance with IEC61000-4-5 Class 3 (42 Ω source). |
Use Scenario: CAN bus power line (VBAT) in door module subjected to ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding CAN transceiver and microcontroller. Use Value: Clamps 100 V/100 ms load dump to 24.4 V within <100 ps, preserving 30 V absolute maximum ratings of connected ICs. |
| Telecom Line Card Surge Protection | Medical Equipment DC Rail Guard |
Use Scenario: 48 V phantom power input on VoIP gateway line card exposed to induced RF and lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on -48 V supply rail upstream of DC/DC isolation stage. Use Value: Absorbs 500 W peak pulses without degradation, meeting GR-1089-CORE Section 4.5.2.2 telecom surge requirements. |
Use Scenario: 5 V/3.3 V internal supply rail in patient-monitoring device requiring IEC60601-1-2 4th Ed. ESD immunity. IC Role / Device Role / Timing Role: Secondary-level TVS protecting ADC reference and op-amp supply pins from board-level coupling. Use Value: Sub-µA leakage at 5 V ensures no impact on precision analog accuracy; <100 ps response prevents latch-up in CMOS ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3/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 SMAJ15AHE3/TR13 only if JANTX qualification and full lot traceability are contractually required. |
| SMBJ15AE3/TR13 | Same VWM, VBR, VC, but lower 400 W peak pulse power (vs. 500 W); SMB package (DO-214AA) has larger thermal pad area but same footprint width. | Marginally lower surge capacity; suitable where IEC61000-4-5 Class 3 (not Class 4) is sufficient and board space allows SMB footprint. | Choose SMBJ15AE3/TR13 only if design tolerates 20% lower PPP and benefits from SMB's slightly better thermal performance on large copper pours. |
Compared with SMAJ15AE3/TR13, SMAJ15AHE3/TR13 adds military-grade screening at higher cost and longer lead time, while SMBJ15AE3/TR13 trades 100 W peak power for marginally improved thermal spreading-neither is pin-compatible nor drop-in; both require layout review for mechanical fit and surge margin verification.
Availability
SMAJ15AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line cards, and medical DC rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15AE3/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 specifically for surface-mount transient suppression in harsh environments, targeting applications demanding fast response, high surge robustness, and long-term stability under thermal cycling.
FAQ
What is the clamping voltage of SMAJ15AE3/TR13 at its rated peak pulse current?
The SMAJ15AE3/TR13 has a maximum clamping voltage (VC) of 24.4 V at 20.6 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. Engineers must verify that downstream ICs tolerate this clamped level with appropriate safety margin.
Is SMAJ15AE3/TR13 unidirectional or bidirectional, and how is polarity marked?
SMAJ15AE3/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 device body-this band must be connected to system ground, while the anode connects to the protected line. Bidirectional variants (e.g., SMAJ15CAE3/TR13) exist but have different breakdown symmetry and are not interchangeable with SMAJ15AE3/TR13.
Does SMAJ15AE3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ15AE3/TR13 is validated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (VC ≤ 24.4 V at 20.6 A), and with 12 Ω source impedance up to Class 2. Its 500 W peak pulse rating and sub-100 ps response ensure compliance without external circuitry-designers must confirm test setup matches the standard's specified source impedance and coupling method.
What is the maximum steady-state power dissipation for SMAJ15AE3/TR13 on a standard FR4 board?
When mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended footprint, SMAJ15AE3/TR13 dissipates up to 1.56 W at ambient temperature (TA = 25 °C) and 5 W at lead temperature (TL = 75 °C). These values derive from its thermal resistance of 80 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), respectively-critical for thermal design in enclosed or high-temperature enclosures.
How does the "TR13" suffix affect packaging and assembly of SMAJ15AE3/TR13?
The "TR13" suffix denotes tape-and-reel packaging on a 13-inch reel containing 2500 units, conforming to EIA-481-1-A standards. This format enables direct integration into automated pick-and-place machines without manual handling or repackaging, reducing SMT line downtime and contamination risk. Reel tension, pocket depth, and carrier tape dimensions match industry-standard feeders for high-yield placement.
SMAJ15AE3/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMAJ15AE3/TR13 FAQ
1.How can I place an order for SMAJ15AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15AE3/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 SMAJ15AE3/TR13 reliable?
The price and inventory of SMAJ15AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ15AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15AE3/TR13?
SMAJ15AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15AE3/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 SMAJ15AE3/TR13?
For technical support, including SMAJ15AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ15AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ15AE3/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 SMAJ15AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ15AE3/TR13?
All SMAJ15AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15AE3/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 SMAJ15AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ15AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15AE3/TR13 Tags
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