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Diodes Incorporated SMAJ13A-13-F
- Part No.:
- SMAJ13A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13A-13-F.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:150,843
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Product details
Overview
SMAJ13A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 13V reverse standoff voltage (VRWM), 21.5V maximum clamping voltage at 18.6A peak pulse current, and fast response time under 1.0ps. Used in automotive infotainment power rails to suppress load dump and ISO 7637-2 transients.
For engineers reviewing the SMAJ13A-13-F datasheet, SMAJ13A-13-F pinout, SMAJ13A-13-F application, or SMAJ13A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under 8.3ms half-sine surge, unidirectional polarity alignment with DC bias, and SMA package thermal performance under board-level power dissipation constraints.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (14.4–15.9V), it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated die ensures stable leakage (<5µA at 13V) and repeatable clamping behavior across temperature (-55°C to +150°C).
The device is optimized for single-pulse, non-repetitive surge events per JEDEC standards - validated with 8.3ms half-sine waveform, 4 pulses/minute max duty cycle. Its 1.0W steady-state power rating at TL=75°C supports reliable operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surge without failure; derates linearly above +25°C ambient. |
| Reverse Standoff Voltage | 13V - maximum continuous DC voltage before significant leakage; sets minimum operating margin for 12V systems. |
| Clamping Voltage | 21.5V @ 18.6A - limits transient voltage seen by protected ICs; must be below absolute max rating of downstream components. |
| Breakdown Voltage | 14.4–15.9V @ 1mA - defines avalanche onset range; tighter tolerance enables predictable turn-on timing. |
| Leakage Current | <5µA @ 13V - negligible standby power loss; avoids false triggering in low-power sensor nodes. |
| Package | SMA (DO-214AC) - standardized surface-mount footprint; 2.29–2.92mm body width supports automated placement and reflow. |
Pinout & Package
Two-terminal SMA (DO-214AC) package with cathode band marking for unidirectional polarity identification. Terminals are matte tin-plated, solderable per MIL-STD-202 Method 208, and compliant with J-STD-020 moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / ground reference | Connected to system ground or low-side return; completes shunt path during avalanche conduction. |
| Cathode | Protected line input | Connected to line being protected (e.g., 12V rail); polarity must match DC bias direction. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) in automotive 12V systems without derating. |
| Glass-passivated die | Ensures long-term parameter stability and resistance to humidity-induced degradation in industrial environments. |
| Fast response time (<1.0ps) | Clamps transients before sensitive logic or analog circuitry experiences overvoltage stress. |
| RoHS-compliant & halogen-free | Meets automotive and industrial environmental compliance requirements (AEC-Q101 qualified variant available). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery-fed infotainment head unit exposed to load dump transients up to 60V. IC Role / Device Role: Primary shunt clamp on main 12V input rail upstream of DC-DC converters. Use Value: Limits transient voltage to ≤21.5V, preserving integrity of 28V-rated buck controllers and microcontrollers. | Use Scenario: 4–20mA current loop transmitter in factory automation with ESD-prone field wiring. IC Role / Device Role: Input-stage overvoltage clamp protecting precision op-amps and ADC front-end. Use Value: Clamps IEC 61000-4-2 contact discharge (±8kV) within 1ps, preventing latch-up in analog signal chain. |
| Telecom DC Feeder Line | Consumer USB Power Delivery |
Use Scenario: Central office PSE supplying 48V PoE++ to remote equipment over 100m cable runs. IC Role / Device Role: Secondary surge clamp on secondary-side 48V output after isolation transformer. Use Value: Absorbs induced lightning surges (IEC 61000-4-5, 2Ω/12Ω coupling) without degrading 48V regulation. | Use Scenario: USB-C port on portable monitor handling 20V/5A PD input with hot-plug insertion events. IC Role / Device Role: Input-side TVS on VBUS line before USB PD controller and buck converter. Use Value: Suppresses ±15kV ESD (IEC 61000-4-2) and 100ns ring wave transients while maintaining <5µA leakage at 20V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/5A (Vishay) | Identical VRWM (13V), clamping voltage 21.5V, but rated for 1.5W steady-state power vs. 1.0W. | Better thermal margin in high-ambient industrial enclosures; same 400W pulse rating. | Select when board-level thermal management is limited and higher PM(AV) improves reliability. |
| P6SMB13A (ON Semiconductor) | Same SMA package, 13V VRWM, but 22.0V clamping voltage at 18.2A and 600W peak pulse rating. | Higher pulse energy handling; slightly looser clamping margin may require downstream voltage margin check. | Choose for enhanced surge robustness where 0.5V clamping increase is acceptable for protected ICs. |
Compared with SMAJ13A-13-F, SMAJ13A-E3/5A offers superior steady-state thermal resilience, while P6SMB13A trades marginally higher clamping for greater single-pulse energy absorption - both require verification of PCB layout thermal relief and trace inductance impact on clamping speed.
Availability
SMAJ13A-13-F is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial 4–20mA sensor interfaces, and telecom DC feeder lines requiring stable component supply and AEC-Q101-aligned quality assurance.
Supply support for SMAJ13A-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 North America.
The SMAJ series belongs to Diodes' transient suppression product line, engineered specifically for high-reliability DC line protection in automotive, industrial, and communications infrastructure where fast clamping, low leakage, and AEC-Q101 qualification are critical.
FAQ
What is the maximum operating temperature for SMAJ13A-13-F?
The SMAJ13A-13-F has a junction temperature range of –55°C to +150°C and a storage temperature range of –55°C to +150°C. Its thermal derating curve shows 100% peak pulse power at +25°C ambient, decreasing linearly to ~50% at +100°C ambient. Lead temperature must not exceed +75°C for full 1.0W steady-state dissipation.
Is SMAJ13A-13-F suitable for bidirectional signal lines?
No - SMAJ13A-13-F is unidirectional, indicated by the absence of "C" in its part number. Bidirectional variants (e.g., SMAJ13CA-13-F) are available for AC-coupled or symmetrical signal paths like RS-485 or CAN bus. Using this part on bidirectional lines risks forward conduction during negative transients.
How does the SMA package affect thermal performance?
The SMA (DO-214AC) package provides moderate thermal resistance: junction-to-lead RθJL is ~15°C/W, enabling 1.0W steady-state dissipation at TL = +75°C. Effective PCB copper area (≥100 mm² per terminal) and thermal vias reduce RθJA, but pulse power handling remains governed by silicon mass and transient duration, not steady-state limits.
Does SMAJ13A-13-F meet AEC-Q101 qualification?
The standard SMAJ13A-13-F is not AEC-Q101 qualified. However, Diodes offers the automotive-grade SMAJ13AQ-13-F variant - identical electrical specs but manufactured in IATF 16949-certified facilities, PPAP-capable, and fully qualified to AEC-Q101 Rev D for use in automotive powertrain and chassis systems.
SMAJ13A-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
SMAJ13A-13-F FAQ
1.How can I place an order for SMAJ13A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13A-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 SMAJ13A-13-F reliable?
The price and inventory of SMAJ13A-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 SMAJ13A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ13A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13A-13-F?
SMAJ13A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13A-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 SMAJ13A-13-F?
For technical support, including SMAJ13A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13A-13-F requirements.
6.How does Aetrix verify that SMAJ13A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ13A-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 SMAJ13A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ13A-13-F?
All SMAJ13A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13A-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 SMAJ13A-13-F part is unused and in its original packaging.
Return procedure for SMAJ13A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13A-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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