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Diodes Incorporated SMAJ170A-13
- Part No.:
- SMAJ170A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170A-13.pdf
- Description:
- TVS DIODE 170VWM 275VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,632
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Product details
Overview
SMAJ170A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal paths. It features a 170V reverse standoff voltage (VRWM), 189–209V breakdown voltage (VBR) at 1mA, 275V maximum clamping voltage (VC) at 1.4A peak pulse current (IPP), and operates from –55°C to +150°C junction temperature.
For engineers reviewing the SMAJ170A-13 datasheet, SMAJ170A-13 pinout, SMAJ170A-13 application, or SMAJ170A-13 equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional polarity handling, SMA package thermal dissipation capability, and compliance with IEC 61000-4-2/4-5 ESD/surge immunity requirements.
Technical Context
This TVS diode uses glass-passivated silicon junction technology to achieve fast response time (<1ps) and stable clamping during transient events. Its unidirectional configuration provides low-leakage forward conduction path while blocking reverse surges above VRWM.
The device is rated for 400W non-repetitive peak pulse power (PPK) at TA = 25°C, derated linearly above ambient temperature per Fig. 1, and supports steady-state power dissipation of 1.0W at TL = 75°C. It meets JEDEC-standard 8.3ms half-sine surge testing with ≤4 pulses/minute duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surge without failure under defined test conditions |
| Reverse Standoff Voltage | 170V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 189–209V @ 1mA - precise VBR range ensures predictable turn-on threshold |
| Clamping Voltage | 275V @ 1.4A IPP - limits downstream circuit voltage during surge event |
| Junction Temperature Range | –55°C to +150°C - enables operation in automotive engine bays and industrial control enclosures |
| Package | SMA - surface-mount plastic case with UL 94V-0 flammability rating and 0.064g mass |
Pinout & Package
SMA package: molded plastic case with cathode band marking; dimensions: 4.00–4.60mm length × 2.29–2.92mm width × 1.27–1.63mm height; terminals are solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Marked with band; connects to protected line; conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| 400W peak pulse rating | Supports robust protection against IEC 61000-4-5 Level 4 (4kV) surges on 50Ω source impedance |
| Fast response time | <1ps junction response enables clamping before sensitive ICs experience overstress |
| RoHS-compliant finish | Matte tin plating meets EU Directive 2002/95/EC with exemptions for high-temp solder |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump transients up to 120V. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and ground, absorbing energy before LDOs or microcontrollers. Use Value: Clamps 170V standoff line to ≤275V during 1.4A surge, preventing MOSFET gate oxide rupture and MCU brownout. | Use Scenario: Analog input modules receiving 4–20mA signals from field transmitters in factory environments. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal line, paired with series resistor and filter capacitor. Use Value: Limits induced surges from nearby motor switching to sub-275V, preserving ADC reference integrity and isolation barrier lifetime. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control Boards |
Use Scenario: -48V telecom rectifier outputs feeding base station RF amplifiers. IC Role / Device Role / Timing Role: Secondary protection stage after bulk MOV, providing precise low-leakage clamping. Use Value: Maintains <5μA leakage at –48V, avoiding false trips in monitoring circuits while clamping lightning-induced spikes. | Use Scenario: Gate driver supply rails in solar string inverters subject to grid-switching transients. IC Role / Device Role / Timing Role: Rail clamp on isolated 15V gate supply, protecting SiC MOSFET drivers from overshoot. Use Value: Withstands repeated 1.4A surges without parameter shift, ensuring consistent gate voltage limiting across 25-year field life. |
Availability
SMAJ170A-13 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and renewable energy inverter control boards requiring stable component supply and full traceability.
Supply support for SMAJ170A-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-energy surge immunity in harsh-environment power and signal interfaces where reliability and repeatable clamping are critical.
FAQ
What is the difference between SMAJ170A-13 and SMAJ170CA-13?
SMAJ170A-13 is unidirectional, with cathode band marking and forward conduction capability; SMAJ170CA-13 is bidirectional, lacks polarity marking, and clamps symmetrically for AC-coupled or floating signal lines. Their VBR and VC values differ slightly due to internal structure-bidirectional units exhibit higher leakage below 10V VRWM per Note 7.
Can SMAJ170A-13 be used in place of SMAJ150A-13 for higher-voltage rail protection?
Yes, provided the protected circuit's normal operating voltage remains ≤170V VRWM and transient energy does not exceed 400W. SMAJ170A-13 offers higher standoff but identical package and thermal behavior; its 275V clamping is 32V higher than SMAJ150A-13's 243V, which may affect downstream voltage margin.
Is the SMAJ170A-13 RoHS compliant and lead-free?
Yes-the standard SMAJ170A-13 uses matte tin plating and complies with RoHS Directive 2002/95/EC, including exemptions for high-temperature solder and glass. The "-F" suffix (e.g., SMAJ170A-13-F) explicitly denotes the RoHS-compliant version per Note 9, though both share identical electrical specs.
What is the maximum allowable mounting temperature during reflow soldering?
The SMA package supports standard lead-free reflow profiles per J-STD-020C Level 1. Peak temperature must not exceed 260°C for ≤10 seconds; preheat ramp rate ≤3°C/s; and time above 217°C must be 60–150 seconds. Exceeding these risks delamination or junction damage.
SMAJ170A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 1.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ170A-13 FAQ
1.How can I place an order for SMAJ170A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170A-13 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 SMAJ170A-13 reliable?
The price and inventory of SMAJ170A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ170A-13 is usually 5 days.
3.What payment methods are accepted for SMAJ170A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170A-13?
SMAJ170A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170A-13 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 SMAJ170A-13?
For technical support, including SMAJ170A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170A-13 requirements.
6.How does Aetrix verify that SMAJ170A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ170A-13 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 SMAJ170A-13 meets industry standards.
7.What is the process for return or replacement of SMAJ170A-13?
All SMAJ170A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170A-13, 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 SMAJ170A-13 part is unused and in its original packaging.
Return procedure for SMAJ170A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ170A-13 Tags
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