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Diodes Incorporated SMAJ17A-13-F
- Part No.:
- SMAJ17A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17A-13-F.pdf
- Description:
- TVS DIODE 17VWM 27.6VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:172,529
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Product details
Overview
SMAJ17A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 17V reverse standoff voltage, 27.6V max clamping voltage at 14.5A peak pulse current, and SMA package. It protects DC power rails and signal lines in automotive ECUs, industrial PLC I/O modules, and telecom power supplies against ESD, lightning-induced surges, and inductive switching transients.
For engineers reviewing the SMAJ17A-13-F datasheet, SMAJ17A-13-F pinout, SMAJ17A-13-F application, or SMAJ17A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C ambient, and compatibility with automated SMT reflow profiles for SMA packages.
Technical Context
This TVS operates as a voltage-clamping device triggered by avalanche breakdown when reverse voltage exceeds 17V standoff rating. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5µA at VRWM), while fast response time (<1.0ps) enables suppression of sub-nanosecond ESD events per IEC 61000-4-2 Level 4.
The device is rated for 400W non-repetitive peak pulse power (8.3ms half-sine), with steady-state power dissipation limited to 1.0W at lead temperature TL = +75°C. Thermal derating follows a linear curve down to zero power at +150°C junction temperature, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surge without failure; defines maximum energy absorption capability |
| Reverse Standoff Voltage | 17V - maximum continuous DC or RMS voltage before clamping initiates; sets operating margin below protected circuit rail |
| Max Clamping Voltage | 27.6V @ IPP = 14.5A - peak voltage seen by downstream circuit during worst-case surge; determines minimum required IC overvoltage tolerance |
| Breakdown Voltage | 18.9–20.9V @ IT = 1.0mA - tight VBR window ensures consistent turn-on threshold across production lots |
| Leakage Current | <5µA @ VRWM = 17V - negligible standby power loss and minimal impact on high-impedance sensor or reference circuits |
| Junction Temp Range | −55°C to +150°C - supports automotive under-hood, industrial motor drive, and outdoor telecom deployments |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band polarity indicator, and matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms clamping path with cathode during transient |
| Cathode | High-side connection point | Connected to protected line; avalanche conduction occurs from cathode to anode when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against IEC 61000-4-5 Level 3 (1kV/2Ω) surges in 24V industrial systems |
| Glass Passivated Die | Ensures stable VBR over temperature and lifetime; eliminates parameter drift due to moisture or contamination |
| Fast Response Time | Sub-nanosecond turn-on limits voltage overshoot during ESD events per IEC 61000-4-2 |
| RoHS & Halogen-Free | Meets EU RoHS 3 (2015/863/EU) and automotive green standards; no bromine/chlorine/antimony restrictions |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects LIN bus transceiver and microcontroller GPIO pins from load dump and alternator ripple in BCMs. IC Role / Device Role: Unidirectional TVS clamps positive transients on 12V supply rail and signal lines. Use Value: 27.6V clamping voltage provides 5.4V margin below typical 33V automotive overvoltage limit, preventing latch-up in 5V logic. | Use Scenario: Shields 24V digital input channels from field-wiring induced surges and relay coil flyback. IC Role / Device Role: Standoff-rated TVS absorbs repetitive 400W pulses without degradation. Use Value: 14.5A peak pulse current rating handles 24V/2A relay coil energy (E = ½LI² ≈ 24mJ) with safety margin. |
| Telecom Power Supply OVP | Medical Sensor Interface |
Use Scenario: Provides secondary overvoltage protection on +48V DC-DC converter output feeding base station radios. IC Role / Device Role: Fast-clamping TVS supplements primary regulation to prevent damage during feedback loop failure. Use Value: 17V standoff allows use on 12V auxiliary rails; 27.6V clamping avoids triggering downstream undervoltage lockout. | Use Scenario: Guards analog front-end inputs of patient monitoring devices against ESD from operator contact. IC Role / Device Role: Low-leakage (≤5µA) TVS preserves signal integrity on high-impedance biopotential amplifiers. Use Value: Sub-1nA leakage at 12V bias ensures <0.1% gain error in 10MΩ input impedance circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA-13-F | Bidirectional version; symmetric clamping for AC-coupled or floating signal lines | Required for RS-485 differential pairs or audio lines where negative transients occur | Select only if bidirectional protection is needed; otherwise unidirectional offers lower leakage and tighter VBR |
| SMBJ17A-13-F | Same electrical specs but SMB package (higher PPK = 600W, larger footprint) | Used where higher surge margin or board-level creepage/clearance is mandated (e.g., EN 61000-4-5) | Choose SMBJ only if 400W is insufficient or IPC-2221 spacing rules require larger body |
Compared with SMAJ17CA-13-F and SMBJ17A-13-F, SMAJ17A-13-F delivers optimal cost, size, and leakage performance for unidirectional DC rail protection-making it preferred for space-constrained 12V/24V embedded systems where bidirectional capability or 600W headroom is unnecessary.
Availability
SMAJ17A-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O protection, and telecom power supply overvoltage safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ17A-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 sales operations across Asia, Europe, and the Americas.
The SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability surge protection in automotive, industrial, and communications infrastructure where AEC-Q200 compliance and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of SMAJ17A-13-F at its rated peak pulse current?
The maximum clamping voltage is 27.6V measured at 14.5A peak pulse current (IPP) under 8.3ms half-sine waveform conditions per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and represents the highest voltage imposed on the protected circuit during worst-case surge events.
Does SMAJ17A-13-F meet automotive qualification standards?
No-SMAJ17A-13-F is the standard industrial-grade variant. For automotive applications, Diodes offers the pin-compatible SMAJ17AQ-13-F, which is qualified to AEC-Q200, manufactured in IATF 16949 certified facilities, and supported with PPAP documentation. The "Q" suffix denotes automotive qualification.
How does the SMA package affect thermal performance compared to SMB or SMC?
The SMA package has a junction-to-lead thermal resistance (RθJL) of approximately 15°C/W, resulting in 1.0W steady-state power dissipation at TL = +75°C. This is 33% lower than SMB (1.5W) and 50% lower than SMC (2.0W), making SMA suitable for moderate-power surge duty but requiring layout attention to copper pour and via count for thermal relief.
Can SMAJ17A-13-F be used in bidirectional signal line protection?
No-it is unidirectional and conducts only during positive transients on the cathode. For bidirectional protection (e.g., RS-485, USB, or AC-coupled audio), the SMAJ17CA-13-F variant must be used. Using the unidirectional part on floating or AC signals risks forward conduction during negative excursions, potentially damaging upstream drivers.
SMAJ17A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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
SMAJ17A-13-F FAQ
1.How can I place an order for SMAJ17A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17A-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 SMAJ17A-13-F reliable?
The price and inventory of SMAJ17A-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 SMAJ17A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ17A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17A-13-F?
SMAJ17A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17A-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 SMAJ17A-13-F?
For technical support, including SMAJ17A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17A-13-F requirements.
6.How does Aetrix verify that SMAJ17A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ17A-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 SMAJ17A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ17A-13-F?
All SMAJ17A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17A-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 SMAJ17A-13-F part is unused and in its original packaging.
Return procedure for SMAJ17A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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