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Diodes Incorporated SMAJ170CA-13-F
- Part No.:
- SMAJ170CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170CA-13-F.pdf
- Description:
- TVS DIODE 170VWM 275VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:30,117
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Product details
Overview
SMAJ170CA-13-F from Diodes Incorporated is a bidirectional 400W transient voltage suppressor (TVS) diode in SMA package, designed for overvoltage protection of sensitive electronics. It features a 170V reverse standoff voltage (VRWM), 189–209V breakdown voltage (VBR), 275V max clamping voltage (VC) at 1.4A peak pulse current (IPP), and operates from –55°C to +150°C - used in DC power input protection for industrial control modules.
For engineers reviewing the SMAJ170CA-13-F datasheet, SMAJ170CA-13-F pinout, SMAJ170CA-13-F application, or SMAJ170CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, unidirectional vs. bidirectional polarity requirements, thermal derating above +25°C, and compatibility with IEC 61000-4-2/4-5 surge immunity test levels.
Technical Context
This bidirectional TVS diode functions as a voltage-clamped shunt protector, responding within <1 ps to transients by avalanche breakdown across both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<5 µA at VRWM), while the SMA package supports surface-mount reflow assembly with UL 94V-0 flammability rating.
It delivers 400W non-repetitive peak pulse power (8.3 ms half-sine waveform), with thermal derating to ~70% power capability at +75°C ambient and full derating beyond +125°C. Clamping performance is validated under JEDEC-standard surge conditions, with no minimum forward voltage specification since it operates symmetrically in either direction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 8.3 ms surge events per IEC 61000-4-5 without failure |
| Reverse Standoff Voltage | 170 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 189–209 V - guaranteed avalanche initiation range at 1 mA test current |
| Max Clamping Voltage | 275 V at 1.4 A IPP - upper limit of protected line voltage during worst-case surge |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive and industrial environments |
| Package | SMA - industry-standard surface-mount outline (4.0–4.6 mm length, 2.29–2.92 mm width) |
| RoHS Compliance | Lead-free, halogen-free, antimony-free - meets EU RoHS 3 (2015/863/EU) and J-STD-020 Level 1 MSL |
Pinout & Package
Two-terminal SMA package with symmetrical bidirectional construction: no polarity marking or cathode band. Terminals are matte tin-plated for solderability per MIL-STD-202 Method 208; weight ≈0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output - identical clamping behavior in both directions |
| Case (SMA body) | Thermal and mechanical interface | Molded plastic housing rated UL 94V-0; provides mechanical anchoring and heat dissipation via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) on 24/48 V DC rails |
| Glass-passivated die | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| Bidirectional configuration | Protects AC-coupled or floating signal lines without polarity constraints (e.g., RS-485, CAN FD bus) |
| Fast response time | Sub-nanosecond turn-on limits voltage overshoot during ESD (IEC 61000-4-2 ±8 kV contact) |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC sensor inputs exposed to load dump and inductive switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Shunt TVS device clamping transient energy directly at connector entry point. Use Value: Limits induced voltage to ≤275 V, preventing damage to downstream analog front-end ICs and microcontrollers. | Use Scenario: LIN bus transceiver protection in door module ECUs subject to battery disconnect spikes and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between LIN transceiver pins and vehicle harness. Use Value: Maintains signal integrity during ±100 V/50 ms pulses without forward conduction asymmetry. |
| Telecom Power Feeds | Renewable Energy Inverter Control |
Use Scenario: 48 V DC power input stage of remote radio units (RRUs) subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage suppression element upstream of DC-DC converter input filter. Use Value: Absorbs up to 400 W for 8.3 ms, reducing need for secondary MOV-based protection stages. | Use Scenario: Auxiliary 12 V control supply in solar inverter gate driver boards exposed to ground potential rise events. IC Role / Device Role / Timing Role: Bidirectional clamp protecting isolated feedback optocoupler supply rails. Use Value: Prevents latch-up in CMOS logic by limiting common-mode transients to <275 V across isolation barrier. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-13-F | Unidirectional version; same VRWM, VBR, VC, and IPP but only clamps positive transients | Required where polarity is fixed (e.g., DC power input with known ground reference) | Select when circuit topology guarantees one-directional surge risk and lower cost is prioritized |
| SMBJ170CA | Same electrical specs but SMB package (larger footprint, higher thermal mass, 600 W PPK) | Preferred for higher surge duty cycles or elevated ambient temperatures (>+85°C) | Choose when board space allows larger package and system requires >400 W single-pulse handling |
Compared with SMAJ170A-13-F, this bidirectional variant eliminates polarity dependency but trades off slightly higher capacitance; versus SMBJ170CA, it offers identical protection performance in a smaller footprint but with reduced thermal margin under repetitive stress.
Availability
SMAJ170CA-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power feed applications requiring stable component supply and AEC-Q200-aligned manufacturing traceability.
Supply support for SMAJ170CA-13-F 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, manufacturing, and distribution operations across Asia, Europe, and North America.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability industrial and automotive surge protection where compact size, precise clamping, and extended temperature operation are critical.
FAQ
What does the 'C' suffix in SMAJ170CA-13-F indicate?
The 'C' denotes bidirectional configuration - meaning the device clamps transients of either polarity identically, with no anode/cathode distinction. This differs from unidirectional variants (e.g., SMAJ170A-13-F), which only protect against positive-going surges relative to ground and require correct orientation during placement.
Can SMAJ170CA-13-F be used in place of a unidirectional TVS in a DC power line?
Yes, but with trade-offs: bidirectional operation introduces ~2× higher junction capacitance (≈15 pF vs. ~7 pF for unidirectional), potentially affecting high-frequency noise filtering. It also lacks a cathode band for polarity verification, increasing risk of misplacement if layout assumes unidirectional routing.
What is the maximum allowable PCB pad temperature during reflow soldering?
The SMAJ170CA-13-F is rated for standard lead-free reflow profiles per J-STD-020. Peak temperature must not exceed 260°C for ≤10 seconds, with ramp rates limited to ≤3°C/s. Preheat and soak zones must stay below 200°C to avoid internal delamination or passivation damage.
How does its clamping voltage compare to MOV-based protection at 170 V nominal systems?
At 1.4 A IPP, SMAJ170CA-13-F clamps to 275 V - significantly tighter than typical 170 V MOVs (which clamp ≥350 V). This enables better protection margin for 200 V-rated downstream components, though MOVs offer higher total energy absorption over multiple events.
SMAJ170CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 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
SMAJ170CA-13-F FAQ
1.How can I place an order for SMAJ170CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170CA-13-F 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 SMAJ170CA-13-F reliable?
The price and inventory of SMAJ170CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ170CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ170CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170CA-13-F?
SMAJ170CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170CA-13-F 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 SMAJ170CA-13-F?
For technical support, including SMAJ170CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170CA-13-F requirements.
6.How does Aetrix verify that SMAJ170CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ170CA-13-F 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 SMAJ170CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ170CA-13-F?
All SMAJ170CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170CA-13-F, 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 SMAJ170CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ170CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ170CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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