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Microchip Technology SMAJ17E3/TR13
- Part No.:
- SMAJ17E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17E3/TR13.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,983
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Product details
Overview
SMAJ17E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 17 V working standoff voltage (VWM), 18.9 V minimum breakdown voltage (VBR), and 30.5 V maximum clamping voltage (VC) at 16.4 A peak pulse current - used to protect I/O lines and power rails in industrial control and telecom interfaces against ESD, EFT, and secondary lightning surges.
For engineers reviewing the SMAJ17E3/TR13 datasheet, SMAJ17E3/TR13 pinout, SMAJ17E3/TR13 application, or SMAJ17E3/TR13 equivalent, this part delivers verified IEC 61000-4-2 Level 4 (±15 kV contact), IEC 61000-4-4 (4 kV), and IEC 61000-4-5 Class 4 (with 12 Ω source) surge immunity in a RoHS-compliant, tape-and-reel packaged device suitable for automated SMT assembly.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp between line and ground, triggering when reverse voltage exceeds 17 V (VWM) and fully clamping within <100 ps to limit transient energy to sensitive downstream circuitry. Its low leakage (<1 µA at VWM) ensures minimal standby power impact on high-impedance signal paths.
The device uses silicon avalanche junction technology with a thermal resistance of 15 °C/W (junction-to-lead) and is qualified for operation from –65 °C to +150 °C. It meets MIL-STD-750 solderability requirements and features matte-tin plating on C-bend leads compatible with standard reflow profiles up to 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above nominal 12–15 V rail voltages. |
| VBR min @ IBR | 18.9 V @ 1 mA - Minimum avalanche breakdown threshold; guarantees reliable turn-on without premature conduction. |
| 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 pulse power handling capacity; supports robust protection against IEC 61000-4-5 42 Ω/12 Ω surge waveforms. |
| ID @ VWM | <1 µA - Reverse leakage current at standoff voltage; avoids loading of high-impedance sensor or communication lines. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with 2.57–2.79 mm body width and 1.70–2.26 mm height; optimized for thermal dissipation and SMT placement. |
| RoHS | e3 suffix - Lead-free matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required. |
Pinout & Package
DO-214AC (SMA) package with two terminals: cathode marked by band on body; anode unmarked. Designed for PCB mounting with recommended footprint per Microsemi MSC0270A Rev L (Page 5), featuring 1.90 mm lead width and 2.39 mm pad length for optimal thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path to ground | Connected to system ground plane; carries full surge current during clamping event; requires low-inductance trace routing. |
| Anode (unmarked end) | Protected line input | Connected to I/O or power line being protected; must be placed upstream of sensitive components with minimal trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse rating | Enables compliance with IEC 61000-4-5 Class 4 (12 Ω source) and Class 1 (42 Ω source) secondary lightning tests without derating. |
| <100 ps response time | Clamps ESD transients before they propagate into CMOS or BiCMOS logic, preventing latch-up or gate oxide damage. |
| 1 µA max leakage @ VWM | Preserves signal integrity on high-impedance analog inputs (e.g., sensor bridges, op-amp feedback networks) without DC offset error. |
| DO-214AC thermal design | 15 °C/W junction-to-lead thermal resistance allows sustained 5 W steady-state dissipation at 75 °C lead temperature. |
| RoHS-compliant e3 plating | Matte-tin termination meets IPC/JEDEC J-STD-020B Level 1 MSL; supports lead-free reflow without voiding or dewetting. |
Applications
| Industrial PLC I/O Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24 V DC digital input modules exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on input line to ground, triggered only during negative transients. Use Value: Limits induced spikes to ≤30.5 V, protecting optocoupler input stages and microcontroller GPIO pins rated for 3.3 V or 5 V logic. | Use Scenario: RS-485 transceiver bus lines in outdoor base stations subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Line-to-ground TVS on each differential pair (A/B) to suppress asymmetric transients while preserving signal integrity. Use Value: Withstands 4 kV EFT bursts per IEC 61000-4-4 and clamps 1 kA 10/1000 µs surges to safe levels for SN65HVD7x-class transceivers. |
| Automotive Body Control Module | Medical Sensor Signal Conditioning |
Use Scenario: LIN bus or switched 12 V supply lines in BCMs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS on power rail to absorb positive-going transients up to 500 W peak. Use Value: Maintains VWM = 17 V margin above 13.5 V nominal battery voltage, enabling robust suppression of 12 V system load-dump events. | Use Scenario: Analog front-end of patient monitoring equipment with isolated pressure/temperature sensors connected via long cables. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on sensor excitation lines to prevent ESD-induced baseline shift in precision ADCs. Use Value: Prevents >100 mV DC error in 24-bit delta-sigma ADCs caused by leakage-induced voltage drop across 10 MΩ sensor impedance. |
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) | Identical VWM (17 V), VBR (18.9 V), VC (30.5 V), and DO-214AC package; same 500 W rating but slightly higher ID (2 µA max). | Same IEC 61000-4-2/4-4/4-5 compliance; validated in Vishay's automotive-grade AEC-Q200 test reports. | Select for AEC-Q200 qualification needs where Microsemi's MA/MX screening is not required. |
| 1.5SMC17A (ON Semiconductor) | Same VWM, VBR, VC, and DO-214AB package (mechanically identical to DO-214AC); 500 W rating; 1 µA ID. | Compatible with same PCB footprint; certified to UL 497B for telecom surge protection; includes detailed SPICE models. | Choose when UL 497B certification or simulation-ready models are required for system-level surge analysis. |
Compared with SMAJ17E3/TR13, SMAJ17A-E3/5A offers AEC-Q200 validation for automotive use, while 1.5SMC17A provides UL 497B listing and SPICE modeling support - both retain identical electrical clamping performance but differ in qualification scope and design tooling availability.
Availability
SMAJ17E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical instrumentation requiring stable component supply with consistent RoHS-compliant manufacturing and tape-and-reel packaging for high-volume SMT production.
Supply support for SMAJ17E3/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 ICs, RF solutions, and discrete protection devices for aerospace, defense, and industrial markets.
The SMAJ series was engineered specifically for surface-mount transient suppression in harsh environments, delivering 500 W surge capability in compact DO-214AC packages with guaranteed response time and thermal stability across –65 °C to +150 °C.
FAQ
What is the clamping voltage of SMAJ17E3/TR13 under a 10/1000 µs surge?
The SMAJ17E3/TR13 has a maximum clamping voltage (VC) of 30.5 V when subjected to its rated peak pulse current of 16.4 A using the standardized 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.
Is SMAJ17E3/TR13 unidirectional or bidirectional?
SMAJ17E3/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 its breakdown voltage (18.9 V min), making it suitable for DC power rail or single-polarity signal line protection where polarity is fixed.
Does SMAJ17E3/TR13 meet IEC 61000-4-5 Class 4 requirements?
Yes, SMAJ17E3/TR13 supports IEC 61000-4-5 Class 4 testing with a 12 Ω source impedance, as confirmed in the Microsemi application notes for the SMAJ5.0–170CA family. Its 500 W peak pulse rating and 30.5 V clamping voltage ensure compliance when applied per the standard's coupling network configuration.
What is the moisture sensitivity level (MSL) of SMAJ17E3/TR13?
SMAJ17E3/TR13 has a moisture sensitivity level (MSL) of Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry packing or baking prior to reflow soldering - a direct result of its void-free thermosetting epoxy body and robust leadframe sealing.
Can SMAJ17E3/TR13 replace SMAJ17A in existing designs?
Yes, SMAJ17E3/TR13 is functionally and mechanically interchangeable with SMAJ17A, sharing identical electrical specifications (VWM, VBR, VC, PPP), DO-214AC package dimensions, and thermal characteristics. The "e3" suffix denotes RoHS-compliant matte-tin plating, which is compatible with all standard lead-free reflow profiles.
SMAJ17E3/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:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SMAJ17E3/TR13 FAQ
1.How can I place an order for SMAJ17E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17E3/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 SMAJ17E3/TR13 reliable?
The price and inventory of SMAJ17E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ17E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17E3/TR13?
SMAJ17E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17E3/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 SMAJ17E3/TR13?
For technical support, including SMAJ17E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17E3/TR13 requirements.
6.How does Aetrix verify that SMAJ17E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ17E3/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 SMAJ17E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ17E3/TR13?
All SMAJ17E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17E3/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 SMAJ17E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ17E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17E3/TR13 Tags
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