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Microchip Technology SMAJ170CE3/TR13
- Part No.:
- SMAJ170CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170CE3/TR13.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,108
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Product details
Overview
SMAJ170CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for secondary lightning and ESD/EFT protection in DC power rails and signal lines. It features a 170 V standoff voltage (VWM), 189 V minimum breakdown voltage (VBR), 304 A peak pulse current (IPP @ 10/1000 µs), 287 V clamping voltage (VC), and 500 W peak pulse power dissipation - deployed in telecom power supplies, industrial I/O modules, and automotive body control units.
For engineers reviewing the SMAJ170CE3/TR13 datasheet, SMAJ170CE3/TR13 pinout, SMAJ170CE3/TR13 application, or SMAJ170CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-5 Class 1 compliance (42 Ω source), RoHS-compliant matte-tin plating, DO-214AC package thermal performance (15 °C/W junction-to-lead), and tape-and-reel packaging (TR13 = 2500/reel).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical clamping behavior in forward and reverse directions - enabling single-device protection of AC-coupled or floating signal paths without polarity constraints. Its <100 ps theoretical response time (unidirectional) and <5 ns for bidirectional variants ensures effective suppression of fast transients including ESD per IEC61000-4-2 (±8 kV contact) and EFT per IEC61000-4-4 (±2 kV).
The device is rated for -65°C to +150°C operating temperature, supports 1.56 W steady-state dissipation at 25°C ambient on FR4 (1 oz Cu), and exhibits ≤1.8 µA standby leakage at VWM. Its DO-214AC package provides low thermal resistance (15 °C/W junction-to-lead) and robust mechanical mounting via C-bend leads compatible with standard reflow profiles (260°C/10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 170 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines operating margin before conduction. |
| VBR (Min) | 189 V @ IBR = 1 mA - Confirmed avalanche onset threshold; ensures reliable triggering above normal operating voltage. |
| VC @ IPP | 287 V @ 304 A (10/1000 µs) - Clamped voltage during worst-case surge; determines protected circuit's maximum transient exposure. |
| PPP | 500 W - Peak pulse power handling capacity; validates suitability for IEC61000-4-5 secondary lightning (42 Ω source, Class 1). |
| IPP | 304 A - Peak surge current the device safely shunts to ground; sets minimum trace/safety margin design requirements. |
| ID @ VWM | ≤1.8 µA - Leakage current at rated standoff; ensures negligible power loss and no false triggering in high-impedance circuits. |
| Package | DO-214AC (SMAJ) - Industry-standard surface-mount outline with C-bend leads; enables automated placement and 15 °C/W thermal path. |
Pinout & Package
DO-214AC (SMAJ) package: void-free thermosetting epoxy body (UL94V-0), matte-tin plated C-bend leads, cathode band omitted (bidirectional), marking "170C" on body, moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminal pair | Identical clamping in both directions; no polarity dependency - simplifies layout and eliminates orientation errors during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating nodes without external diode pairing or polarity awareness. |
| IEC61000-4-5 Class 1 compliance | Validated for secondary lightning surges (42 Ω source) up to 304 A - meets system-level immunity requirements in industrial and telecom infrastructure. |
| RoHS-compliant "e3" finish | Matte-tin plating per J-STD-020B Level 1 - supports lead-free reflow (260°C/10 s) and eliminates Pb-based solder compatibility concerns. |
| Low thermal resistance | 15 °C/W junction-to-lead - enables efficient heat transfer to PCB copper, sustaining repeated surge events without thermal runaway. |
| Tape-and-reel packaging | TR13 = 2500 units per 13-inch reel - optimized for high-volume SMT line feeding and reduces manual handling in production environments. |
Applications
| Industrial PLC Analog Inputs | Telecom DC Power Distribution |
|---|---|
Use Scenario: Protection of 0–10 V or 4–20 mA analog input channels against induced surges from nearby motor switching or relay bounce. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach precision ADC front-end or op-amp buffers. Use Value: Maintains signal integrity under 304 A surges while adding <0.1 µA leakage - prevents measurement drift and extends sensor interface IC lifetime. |
Use Scenario: Secondary surge protection on +48 V DC distribution bus feeding remote radio units or base station controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS across power rail and chassis ground, clamping lightning-induced spikes to ≤287 V within <5 ns. Use Value: Enables compliance with IEC61000-4-5 Class 1 (42 Ω) without derating - sustains 500 W pulses without degradation over >10,000 cycles. |
| Automotive Body Control Module (BCM) LIN Bus | Medical Equipment Signal Isolation Barriers |
Use Scenario: Transient suppression on LIN bus lines exposed to load dump or battery disconnect events in vehicle door modules or lighting controls. IC Role / Device Role / Timing Role: Bidirectional clamp bridging LIN data line and local ground, limiting voltage excursions to safe levels for LIN transceiver ICs. Use Value: Withstands -65°C to +150°C operating range and <5 ns response - ensures reliability across full automotive temperature envelope and fast ESD events. |
Use Scenario: Protection of isolated analog signal paths (e.g., patient sensor inputs) where galvanic separation must remain intact during surge events. IC Role / Device Role / Timing Role: TVS placed on primary side of isolation barrier, clamping transients before they couple across transformer or capacitive isolators. Use Value: ≤1.8 µA leakage at 170 V standoff preserves high-impedance isolation integrity - avoids bias current injection that could compromise safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3/TR13 | Unidirectional variant; same VWM, VBR, VC, and PPP, but asymmetric conduction (cathode-marked). | Requires polarity-aware layout; suitable only for DC rails with defined ground reference. | Select when protecting unidirectional DC power paths where reverse polarity fault risk is absent. |
| SMBJ170CA-E3/52 | Same VWM/VC ratings but SMB package (DO-214AA); 600 W PPP, higher IPP (339 A), larger footprint. | Higher surge margin but occupies ~30% more board area; requires modified pad layout. | Choose when system-level testing demands >500 W headroom or legacy SMB footprint reuse is prioritized. |
Compared with SMAJ170CE3/TR13, the unidirectional SMAJ170AHE3/TR13 saves cost in polarity-controlled DC systems, while SMBJ170CA-E3/52 trades compactness for higher surge tolerance - neither offers pin-compatible replacement without layout revision.
Availability
SMAJ170CE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC analog inputs, telecom DC power distribution, and automotive body control modules requiring stable component supply, RoHS-compliant manufacturing, and IEC61000-4-5 Class 1 surge immunity.
Supply support for SMAJ170CE3/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, wide temperature operation, and MIL-grade screening options in compact surface-mount form.
FAQ
What does the "C" suffix indicate in SMAJ170CE3/TR13?
The "C" in SMAJ170CE3/TR13 denotes bidirectional construction - meaning the device clamps symmetrically for both positive and negative transients, with identical VBR, VC, and IPP characteristics in either polarity. This eliminates the need for dual-diode configurations in AC or floating signal paths and is confirmed in Microsemi's MSC0270A datasheet, Page 3 footnote.
Is SMAJ170CE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ170CE3/TR13 is validated for IEC61000-4-5 secondary lightning protection at Class 1 with 42 Ω source impedance, supporting up to 304 A peak pulse current. This rating is explicitly stated in the Applications/Benefits section of the MSC0270A datasheet (Page 1) and correlates directly to its 287 V clamping voltage at 304 A.
What is the thermal resistance specification for SMAJ170CE3/TR13?
SMAJ170CE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient of 80 °C/W when mounted on FR4 with 1 oz copper and the recommended footprint. These values are specified in the Maximum Ratings table (Page 1) and determine safe surge repetition rates and steady-state power derating.
Does SMAJ170CE3/TR13 require moisture-sensitive handling?
No - SMAJ170CE3/TR13 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking prior to reflow. This is confirmed in the Mechanical and Packaging section (Page 1) and simplifies manufacturing logistics.
What is the clamping voltage of SMAJ170CE3/TR13 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMAJ170CE3/TR13 is 287 V at 304 A peak pulse current (10/1000 µs waveform), as specified in the Electrical Characteristics table (Page 3). This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
SMAJ170CE3/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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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)
SMAJ170CE3/TR13 FAQ
1.How can I place an order for SMAJ170CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170CE3/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 SMAJ170CE3/TR13 reliable?
The price and inventory of SMAJ170CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ170CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ170CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170CE3/TR13?
SMAJ170CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170CE3/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 SMAJ170CE3/TR13?
For technical support, including SMAJ170CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ170CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ170CE3/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 SMAJ170CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ170CE3/TR13?
All SMAJ170CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170CE3/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 SMAJ170CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ170CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ170CE3/TR13 Tags
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