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Microchip Technology SMAJ17CAE3/TR13
- Part No.:
- SMAJ17CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17CAE3/TR13.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,812
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Product details
Overview
SMAJ17CAE3/TR13 from Microsemi is a bidirectional surface-mount Transient Voltage Suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 17 V working standoff voltage (VWM), 18.9 V minimum breakdown voltage (VBR), 30.5 V maximum clamping voltage (VC) at 16.4 A peak pulse current (IPP), and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ17CAE3/TR13 datasheet, SMAJ17CAE3/TR13 pinout, SMAJ17CAE3/TR13 application, or SMAJ17CAE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin plating for lead-free assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with <100 ps theoretical response time for unidirectional mode and <5 ns for bidirectional conduction - enabling effective suppression of fast-rising ESD events and inductive switching transients. Its clamping action begins at 18.9 V (VBR min @ 1 mA), limiting voltage excursions to ≤30.5 V under 16.4 A surge conditions.
The device is rated for -65°C to +150°C operating temperature, exhibits 1.56 W steady-state power dissipation at 25°C ambient on FR4 (1 oz Cu), and maintains ≤1 µA standby leakage at 17 V standoff - ensuring minimal impact on low-power circuit biasing while delivering full 500 W transient energy absorption capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 17 V - Maximum continuous reverse voltage before significant leakage; defines safe operating rail margin. |
| VBR (min @ IBR) | 18.9 V @ 1 mA - Minimum voltage at which avalanche conduction initiates; ensures predictable turn-on threshold. |
| VC @ IPP | 30.5 V @ 16.4 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum overvoltage stress. |
| PPP | 500 W - Peak pulse power handling capacity; enables protection against high-energy transients without failure. |
| IPP | 16.4 A - Peak surge current supported at VC; correlates directly with system-level surge test levels (e.g., IEC61000-4-5 Class 4). |
| ID @ VWM | ≤1 µA - Reverse leakage at rated standoff; preserves battery life and signal integrity in always-on systems. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for thermal dissipation and mechanical reliability. |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy body (UL94V-0), C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating; cathode band omitted on bidirectional devices per specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No polarity marking; terminals interchangeable - provides identical clamping in either direction for AC or floating-line protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, CAN bus) without polarity concerns. |
| IEC61000-4-5 Class 4 compliance | Withstands 12 Ω source impedance lightning surges up to 16.4 A - meets highest severity level for secondary lightning protection. |
| RoHS-compliant "e3" finish | Matte-tin plating qualified per MIL-STD-750 Method 2026 - supports lead-free reflow (260°C/10 s) and long-term solderability. |
| Low thermal resistance | 15 °C/W junction-to-lead - enables efficient heat transfer to PCB copper, sustaining repeated surge events without thermal runaway. |
| Moisture sensitivity Level 1 | No dry-pack required per IPC/JEDEC J-STD-020B - simplifies handling, storage, and assembly logistics. |
Applications
| Industrial Power Input Protection | RS-485 Data Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp positive/negative transients before they reach upstream DC-DC converter ICs. Use Value: Limits voltage to ≤30.5 V during 16.4 A surges, preventing damage to 36 V-rated input capacitors and regulator ICs while maintaining system uptime. |
Use Scenario: Differential pair of RS-485 transceiver (e.g., MAX1487) in factory automation network subject to ESD and ground bounce. IC Role / Device Role / Timing Role: One SMAJ17CAE3/TR13 across A/B lines; second across A/GND and B/GND - providing symmetrical common-mode and differential-mode clamping. Use Value: Responds in <5 ns to ±8 kV contact ESD (IEC61000-4-2), preserving data integrity and avoiding transceiver latch-up or permanent failure. |
| Telecom Interface Surge Protection | Automotive Body Control Module (BCM) Sensor Lines |
Use Scenario: Ethernet PHY interface (10/100BASE-TX) in outdoor access point subjected to induced lightning surges via PoE cabling. IC Role / Device Role / Timing Role: Bidirectional TVS applied between each twisted pair and chassis ground - suppressing common-mode transients coupled onto data lines. Use Value: Absorbs 500 W surges per line pair per IEC61000-4-5 (42 Ω source), protecting magnetics and PHY ICs without degrading 100 Mbps signal integrity. |
Use Scenario: LIN bus sensor line (e.g., temperature sensor) in BCM exposed to battery disconnect transients and ISO 7637-2 Pulse 1/2a. IC Role / Device Role / Timing Role: TVS placed between LIN line and ground to clamp negative-going spikes up to -100 V and positive transients to ≤30.5 V. Use Value: Maintains ≤1 µA leakage at 12 V nominal, eliminating false wake-ups; clamps ISO 7637-2 Pulse 1 (−100 V/50 Ω) within safe voltage window for LIN transceiver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/5A (Vishay) | Unidirectional; same VWM/VC/IPP, but asymmetric conduction - requires correct polarity placement. | Only suitable where polarity is fixed (e.g., DC power rail); cannot protect AC or floating signals without additional components. | Select only when circuit topology guarantees consistent polarity and space constraints favor unidirectional solution. |
| 1.5KE18CA (onsemi) | Through-hole DO-15 package; 1.5 kW rating but larger footprint and lower thermal efficiency on PCB. | Used in legacy designs or high-surge environments where board space allows axial-leaded parts; not SMT-compatible. | Choose only for retrofit into existing through-hole layouts or where >500 W surge margin is mandatory and rework is acceptable. |
Compared with SMAJ17A-E3/5A and 1.5KE18CA, SMAJ17CAE3/TR13 delivers bidirectional protection in a compact DO-214AC package with optimized thermal performance for modern SMT production - eliminating polarity dependency and enabling direct integration into high-density telecom and industrial PCBs.
Availability
SMAJ17CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, RS-485 data line hardening, and telecom interface surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ17CAE3/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 - balancing high surge capability, fast response, and manufacturability in automated SMT lines.
FAQ
What does the "CA" suffix indicate in SMAJ17CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ17CAE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMAJ17A), it has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal lines such as RS-485 or CAN bus interfaces.
Is SMAJ17CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ17CAE3/TR13 is certified for IEC61000-4-5 secondary lightning protection: it meets Class 4 (12 Ω source impedance) with 16.4 A peak pulse current and Class 1 (42 Ω source) up to 170 V standoff. Its 30.5 V clamping voltage at that current ensures downstream ICs remain within safe operating limits during standardized surge testing.
What is the maximum steady-state power dissipation of SMAJ17CAE3/TR13 on a standard PCB?
SMAJ17CAE3/TR13 dissipates 1.56 W continuously at 25°C ambient when mounted on an FR4 board with 1 oz copper and Microsemi's recommended footprint. This value drops to 5 W only at lead temperature (TL) = 75°C - emphasizing the need for adequate copper pour and thermal vias to sustain higher average power in high-duty-cycle applications.
Does SMAJ17CAE3/TR13 require moisture-sensitive handling precautions?
No - SMAJ17CAE3/TR13 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without dry packing or baking. This simplifies manufacturing logistics and eliminates yield loss from moisture-related popcorning during reflow soldering.
How does the "TR13" suffix affect packaging and ordering of SMAJ17CAE3/TR13?
The "TR13" suffix indicates tape-and-reel packaging per EIA-481-1-A standard: 12 mm carrier tape, 2500 units per 13-inch reel. This format is optimized for high-speed pick-and-place assembly and ensures consistent feeding, alignment, and traceability in automated SMT production lines.
SMAJ17CAE3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ17CAE3/TR13 FAQ
1.How can I place an order for SMAJ17CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17CAE3/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 SMAJ17CAE3/TR13 reliable?
The price and inventory of SMAJ17CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ17CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17CAE3/TR13?
SMAJ17CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17CAE3/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 SMAJ17CAE3/TR13?
For technical support, including SMAJ17CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ17CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ17CAE3/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 SMAJ17CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ17CAE3/TR13?
All SMAJ17CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17CAE3/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 SMAJ17CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ17CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17CAE3/TR13 Tags
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