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Diodes Incorporated SMAJ15A-13-F
- Part No.:
- SMAJ15A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15A-13-F.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:30,061
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Product details
Overview
SMAJ15A-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 15V reverse standoff voltage (VRWM), 24.4V max clamping voltage at 16.4A peak pulse current, and fast response time under 1.0ps. Used in automotive body control modules to protect CAN transceiver I/O against ISO 7637-2 load dump and ESD events.
For engineers reviewing the SMAJ15A-13-F datasheet, SMAJ15A-13-F pinout, SMAJ15A-13-F application, or SMAJ15A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under 8.3ms surge, unidirectional polarity alignment with supply rail, and SMA package thermal performance in high-density PCB layouts.
Technical Context
This TVS operates as a shunt-clamping device triggered by avalanche breakdown above its 16.7–18.5V breakdown voltage (VBR) at 1mA test current. Its glass-passivated junction ensures stable leakage (<5µA at VRWM) and repeatable clamping behavior across temperature (-55°C to +150°C).
The device responds to transients within picoseconds and sustains 400W non-repetitive peak pulse power per the 10/1000µs waveform. Its unidirectional configuration requires cathode-band orientation toward the protected line's positive side, enabling precise placement in series with downstream regulators or interface ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - supports single-event surge suppression per IEC 61000-4-5 Level 4 (4kV/2Ω) |
| Reverse Standoff Voltage | 15V - maximum continuous DC voltage before significant leakage; sets minimum operating margin for 12V systems |
| Clamping Voltage | 24.4V @ 16.4A - limits transient voltage seen by downstream ICs during 8.3ms half-sine surge |
| Breakdown Voltage | 16.7–18.5V @ 1mA - defines reliable avalanche onset range for consistent protection threshold |
| Leakage Current | <5µA @ 15V - negligible standby power loss and no interference with low-power sensor biasing |
| Package | SMA - industry-standard surface-mount outline (4.0–4.6mm length) compatible with automated assembly and IPC-7351B footprints |
Pinout & Package
Two-terminal SMA package with cathode band marking on unidirectional devices. Terminals are anode (unmarked end) and cathode (band end); polarity must align with circuit ground reference to ensure proper clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to system ground or return path; completes clamping loop during overvoltage event |
| Cathode | High-side connection point | Connected to protected line (e.g., 12V rail or CAN_H); conducts avalanche current when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against ISO 7637-2 pulse 5a (load dump) without derating in ambient temperatures up to +75°C |
| Glass Passivated Die | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity exposure |
| RoHS & Halogen-Free Compliance | Meets automotive ELV directive and JESD204B board-level compliance requirements for lead-free reflow |
| Fast Response Time | Sub-nanosecond turn-on prevents voltage overshoot beyond clamping level during ESD (IEC 61000-4-2) events |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects microcontroller GPIO and LIN transceiver pins from battery reverse connection and jump-start surges in door module ECUs. IC Role / Device Role: Shunt TVS placed between LIN bus line and chassis ground, triggered only during >16.7V transients. Use Value: Limits clamped voltage to 24.4V-well below 36V absolute maximum rating of typical LIN transceivers-preventing latch-up or oxide damage. | Use Scenario: Shields 24VDC digital input optocoupler front-end from induced surges on factory floor wiring. IC Role / Device Role: Primary overvoltage clamp on field-side input trace, upstream of series current-limiting resistor. Use Value: Absorbs 400W surge energy without degradation, maintaining <5µA leakage to preserve input threshold accuracy at 24V nominal. |
| USB-C Power Delivery Port | Smart Meter RS-485 Interface |
Use Scenario: Guards VBUS line against hot-plug inrush and adapter fault conditions in portable charging accessories. IC Role / Device Role: Unidirectional clamp referenced to ground, sized to handle 10/1000µs surges up to 16.4A. Use Value: Clamps VBUS to ≤24.4V during fault, preventing damage to USB PD controller and buck converter MOSFETs rated for 30V drain-source. | Use Scenario: Suppresses lightning-induced surges on two-wire RS-485 trunk lines in outdoor utility meter installations. IC Role / Device Role: Line-to-ground TVS on both A and B differential pairs, leveraging bidirectional variant SMAJ15CA-13-F (not this part). Use Value: This unidirectional SMAJ15A-13-F is used only on single-ended bias networks or auxiliary power rails-not differential data lines-ensuring correct polarity alignment with local ground reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3_A/H | Same electrical specs; Vishay variant with identical SMA package and 15V VRWM | No functional difference; validated for same AEC-Q200 stress tests but different PPAP documentation structure | Select when dual-sourcing required or when Vishay's automotive qualification reporting format is mandated |
| P6SMB15A | Higher 600W peak power; larger SMB package (4.58×3.94mm vs SMA's 4.3×2.5mm); 24.4V clamping unchanged | Better surge handling but occupies 40% more PCB area; not suitable for space-constrained automotive modules | Choose only if system-level testing confirms need for >400W margin and layout allows SMB footprint |
Compared with SMAJ15AHE3_A/H, this Diodes part offers identical protection performance with optimized supply chain traceability for Tier-1 automotive programs; versus P6SMB15A, it trades peak power headroom for compactness-critical in modern ADAS domain controllers where board space is constrained.
Availability
SMAJ15A-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and USB-C accessory power rail stabilization requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15A-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 centers across Asia and manufacturing in certified IATF 16949 facilities.
The SMAJ series belongs to Diodes' transient suppression product line, engineered specifically for automotive-grade reliability in 12V/24V systems subject to ISO 7637-2 and ISO 16750-2 stress profiles.
FAQ
What is the maximum operating temperature for SMAJ15A-13-F?
The device operates from -55°C to +150°C junction temperature. Its thermal resistance (RθJA) is not specified in the datasheet, but the SMA package enables effective heat dissipation when mounted on 1-inch² copper pour. Derating begins above +25°C ambient per Figure 1, reducing peak pulse power to 200W at +85°C ambient.
Can SMAJ15A-13-F be used in bidirectional signal lines like RS-485?
No-SMAJ15A-13-F is unidirectional and lacks symmetrical clamping. For bidirectional data lines, use SMAJ15CA-13-F (the 'C' suffix denotes bidirectional version), which clamps equally on both polarities and has identical VRWM and VC ratings.
How does the 1.0mA test current affect breakdown voltage specification?
VBR is measured at 1.0mA IT, ensuring consistent characterization across production lots. At lower currents (e.g., 100µA), breakdown occurs ~0.3V lower; at higher surge currents, dynamic resistance causes voltage rise-hence VC (24.4V) is specified separately at 16.4A IPP for real-world surge conditions.
Is SMAJ15A-13-F compliant with AEC-Q200?
No-the standard SMAJ15A-13-F is not AEC-Q200 qualified. Diodes offers the automotive-compliant SMAJ15AQ-13-F variant, which undergoes additional stress testing (temperature cycling, vibration, board flex) and is manufactured in IATF 16949-certified facilities with full PPAP documentation.
SMAJ15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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
SMAJ15A-13-F FAQ
1.How can I place an order for SMAJ15A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15A-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 SMAJ15A-13-F reliable?
The price and inventory of SMAJ15A-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 SMAJ15A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ15A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15A-13-F?
SMAJ15A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15A-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 SMAJ15A-13-F?
For technical support, including SMAJ15A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15A-13-F requirements.
6.How does Aetrix verify that SMAJ15A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ15A-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 SMAJ15A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ15A-13-F?
All SMAJ15A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15A-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 SMAJ15A-13-F part is unused and in its original packaging.
Return procedure for SMAJ15A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15A-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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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Diodes Incorporated
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