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Microchip Technology SMAJ17AE3/TR13
- Part No.:
- SMAJ17AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17AE3/TR13.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
SMAJ17AE3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary and secondary surge protection in DC power rails and signal lines. It features a 17 V working peak standoff voltage (VWM), 18.9 V minimum breakdown voltage (VBR), 30.5 V maximum clamping voltage (VC) at 16.4 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 SMAJ17AE3/TR13 datasheet, SMAJ17AE3/TR13 pinout, SMAJ17AE3/TR13 application, or SMAJ17AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 lightning surge (Class 4 with 12 Ω source), unidirectional polarity marking, RoHS-compliant matte-tin plating, and DO-214AC package compatibility with standard SMT reflow profiles.
Technical Context
This TVS operates as a fast-acting silicon avalanche diode, triggered when reverse voltage exceeds VBR (18.9 V min @ 1 mA), entering low-impedance conduction to clamp transients within <100 ps response time. Its unidirectional architecture provides asymmetric protection - forward-biased operation supports surge shunting only in reverse direction, with cathode band marking.
Thermal design relies on junction-to-lead thermal resistance of 15 °C/W and 1.56 W steady-state dissipation at 25 °C ambient on FR4 with recommended footprint. The device meets IEC61000-4-2 (ESD ±30 kV air), IEC61000-4-4 (EFT 40 A), and IEC61000-4-5 (lightning surge up to Class 4) with 12 Ω or 42 Ω source impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12–15 V systems. |
| VBR min @ IBR | 18.9 V @ 1 mA - Minimum voltage at which avalanche breakdown initiates; ensures reliable triggering above normal operating range. |
| VC @ IPP | 30.5 V @ 16.4 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected ICs. |
| PPP | 500 W - Peak transient power handling capacity; sustains single surges up to 10/1000 µs without degradation. |
| IPP | 16.4 A - Peak pulse current corresponding to VC; determines minimum series impedance required for system-level compliance. |
| ID @ VWM | 1 µA - Reverse leakage at rated standoff; negligible loading on 17 V supply rails or high-impedance signal paths. |
| Package | DO-214AC (SMA) - Standard surface-mount outline with C-bend leads; compatible with IPC-7351B footprint and automated placement. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy body (UL94V-0), void-free construction, matte-tin plated C-bend leads, cathode indicated by band. Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping loop during reverse transient events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); marked by band; conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables robust protection against IEC61000-4-5 lightning surges (42 Ω source, Class 1–4) without derating in compact SMT form factor. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity and Pb-free reflow requirements (260 °C/10 s). |
| Fast clamping response | <100 ps theoretical turn-on time ensures suppression before ESD/EFT transients damage downstream CMOS or BiCMOS ICs. |
| Unidirectional configuration | Provides asymmetric protection ideal for DC power rails where reverse polarity is not expected - avoids unnecessary capacitance on signal lines. |
| Tape-and-reel packaging | TR13 designation indicates 2500 units per 13-inch reel per EIA-481-1-A, enabling high-volume automated assembly. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 12 V DC input rail in programmable logic controller (PLC) power stage exposed to load dump and relay switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach DC-DC converter ICs. Use Value: Limits transient overvoltage to ≤30.5 V, preventing latch-up or gate oxide rupture in buck controller MOSFETs rated for 36 V max. |
Use Scenario: LIN bus line in door module subjected to ESD events during connector mating and battery disconnect transients. IC Role / Device Role / Timing Role: TVS mounted at LIN transceiver input to absorb ±30 kV contact ESD per IEC61000-4-2 while maintaining signal integrity. Use Value: Sub-100 ps response ensures clamping occurs before transceiver's internal ESD diodes activate, preserving long-term reliability. |
| Telecom Remote Radio Unit (RRU) | Medical Infusion Pump Motor Driver |
Use Scenario: 24 V auxiliary power feed to remote radio unit enclosure subject to induced lightning surges per IEC61000-4-5 (Class 2, 12 Ω source). IC Role / Device Role / Timing Role: Primary surge protector on DC input, coordinated with upstream fuse and downstream LC filter. Use Value: Withstands 16.4 A peak pulse current at 30.5 V clamp, ensuring no overvoltage propagates to FPGA or RF front-end ICs. |
Use Scenario: H-bridge motor driver supply rail in battery-powered infusion pump experiencing inductive kickback from stepper motor commutation. IC Role / Device Role / Timing Role: TVS across motor driver VDD and GND to suppress flyback spikes generated during PWM switching. Use Value: 500 W rating absorbs repetitive 8.3 ms half-sine surges up to 40 A forward surge current without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17AHE3/TR13 | Same electrical specs but includes 100% temperature cycling screening (-55 °C to +125 °C, 10X) and HTRB testing per avionics grade requirements. | Required for aerospace, defense, or high-reliability industrial deployments where extended thermal cycling validation is mandated. | Select SMAJ17AHE3/TR13 only if MIL-PRF-19500 JANTX or avionics-grade screening is specified in the BOM. |
| SMBJ17A-E3/52 | Same VWM, VBR, and VC, but SMB package (DO-214AA) offers higher thermal mass (junction-to-ambient 60 °C/W vs. 80 °C/W) and 600 W PPP. | Better suited for higher-duty-cycle surge environments or where board space allows larger footprint and improved heat spreading. | Choose SMBJ17A-E3/52 when thermal margin is critical and PCB layout accommodates wider 4.6 mm × 3.9 mm body vs. SMAJ's 4.5 mm × 2.8 mm. |
Compared with SMAJ17AE3/TR13, SMAJ17AHE3/TR13 adds avionics-grade screening without changing electrical behavior, while SMBJ17A-E3/52 trades smaller footprint for higher power handling and better thermal performance - neither is pin-compatible due to differing DO-214AC vs. DO-214AA land patterns.
Availability
SMAJ17AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and medical motor drivers requiring stable component supply with full traceability and RoHS compliance.
Supply support for SMAJ17AE3/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 - emphasizing fast response, repeatable clamping, and qualification to military and industrial surge standards including IEC61000-4-2/4/5.
FAQ
What is the clamping voltage of SMAJ17AE3/TR13 under a 10/1000 µs surge?
The SMAJ17AE3/TR13 has a maximum clamping voltage (VC) of 30.5 V when subjected to its rated peak pulse current of 16.4 A under the standardized 10/1000 µs waveform. This value is guaranteed per Microsemi's MSC0270A Rev L datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMAJ17AE3/TR13 unidirectional or bidirectional?
SMAJ17AE3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only in reverse bias above VBR, with cathode marked by a band. Bidirectional variants (e.g., SMAJ17CAE3/TR13) would provide symmetrical clamping for AC-coupled or floating signal lines.
Does SMAJ17AE3/TR13 meet IEC61000-4-5 Class 4 lightning surge requirements?
Yes - SMAJ17AE3/TR13 is rated for IEC61000-4-5 secondary lightning surge protection up to Class 4 when tested with a 12 Ω source impedance, as confirmed in the Microsemi datasheet. Its 30.5 V clamping voltage at 16.4 A ensures protected circuits remain within safe operating limits during this stress condition.
What is the thermal resistance of SMAJ17AE3/TR13 in typical PCB mounting?
When mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended footprint, SMAJ17AE3/TR13 exhibits a junction-to-ambient thermal resistance of 80 °C/W and a lower junction-to-lead resistance of 15 °C/W. These values inform derating calculations for sustained power dissipation, especially in enclosed or high-temperature environments.
What does the "TR13" suffix indicate in SMAJ17AE3/TR13?
The "TR13" suffix denotes tape-and-reel packaging: 2500 units per 13-inch reel conforming to EIA-481-1-A standards. This format enables automated pick-and-place assembly and is distinct from bulk or ammo-pack options. The "e3" portion confirms RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1.
SMAJ17AE3/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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 18.1A
- 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)
SMAJ17AE3/TR13 FAQ
1.How can I place an order for SMAJ17AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17AE3/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 SMAJ17AE3/TR13 reliable?
The price and inventory of SMAJ17AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ17AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17AE3/TR13?
SMAJ17AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17AE3/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 SMAJ17AE3/TR13?
For technical support, including SMAJ17AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ17AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ17AE3/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 SMAJ17AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ17AE3/TR13?
All SMAJ17AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17AE3/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 SMAJ17AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ17AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17AE3/TR13 Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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