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Diodes Incorporated SMAJ13CA-13
- Part No.:
- SMAJ13CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CA-13.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,041
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Product details
Overview
SMAJ13CA-13 from Diodes Incorporated is a 400W bi-directional transient voltage suppressor (TVS) diode in SMA package, designed for clamping ESD and surge transients on data lines and power rails. It features a 13V reverse standoff voltage (VRWM), 14.4–15.9V breakdown range (VBR @ 1mA), 21.5V max clamping voltage at 18.6A peak pulse current (IPP), and operates from –55°C to +150°C - used in industrial I/O protection and USB port surge suppression.
For engineers reviewing the SMAJ13CA-13 datasheet, SMAJ13CA-13 pinout, SMAJ13CA-13 application, or SMAJ13CA-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, bidirectional symmetry for AC-coupled lines, thermal derating above 25°C ambient, and compatibility with automated SMT placement due to its standardized SMA footprint.
Technical Context
This bi-directional TVS diode uses glass-passivated junction construction for stable breakdown characteristics and fast response (<1 ps) to transient events. Its symmetrical I-V curve enables protection of AC signals or differential buses without polarity constraints, and it complies with IEC 61000-4-2 Level 4 (±15 kV contact) when properly laid out.
The device sustains 400W non-repetitive peak pulse power under 8.3ms half-sine waveform per JEDEC standards, with steady-state power dissipation rated at 1.0W at TL = 75°C. Clamping performance is validated at IPP = 18.6A, delivering VC ≤ 21.5V - critical for safeguarding 12V-rated interface ICs such as RS-485 transceivers and CAN controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - withstands single high-energy surges (e.g., lightning-induced ring waves) without failure |
| Reverse Standoff Voltage (VRWM) | 13V - maximum continuous working voltage before significant leakage; sets upper limit for protected line DC bias |
| Breakdown Voltage (VBR) | 14.4–15.9V @ 1mA - defines onset of avalanche conduction; tight tolerance ensures predictable turn-on |
| Max Clamping Voltage (VC) | 21.5V @ IPP = 18.6A - limits transient overvoltage seen by downstream ICs during surge events |
| Peak Pulse Current (IPP) | 18.6A - peak surge current the device safely shunts while maintaining specified VC |
| Operating Temperature | –55°C to +150°C - supports deployment in automotive engine bays and industrial motor drives |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 4.0–4.6mm body width and 2.01–2.30mm terminal spacing |
Pinout & Package
Two-terminal device in SMA (DO-214AC) package. Cathode band omitted due to bi-directional construction; terminals are non-polarized and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Transient current path | Either terminal conducts during positive or negative transients - no orientation required during placement |
| Case (Plastic Body) | Thermal and mechanical interface | Non-conductive mold compound (UL 94V-0); provides insulation and aids PCB heat dissipation via solder pad area |
Key Features
| Feature | Design Value |
|---|---|
| 400W Peak Pulse Power | Enables robust protection against IEC 61000-4-5 combination wave surges (e.g., 2Ω/12Ω source impedance) without thermal runaway |
| Glass-Passivated Junction | Ensures long-term stability of VBR and low leakage drift across temperature and lifetime |
| Bidirectional Symmetry | Supports AC signal lines (e.g., Ethernet PHY pairs, audio inputs) without polarity-sensitive layout constraints |
| RoHS-Compliant Matte Tin Finish | Compatible with lead-free reflow profiles (J-STD-020C Level 1 moisture sensitivity) and halogen-free assembly |
| SMA Package Standardization | Direct drop-in replacement for other SMA-format TVS diodes (e.g., SMBJ, SMCJ families) with identical land pattern |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: 24V digital input channels exposed to load dump and inductive switching noise in programmable logic controllers. IC Role / Device Role: Primary surge clamp placed between field wiring and optocoupler/signal conditioner input. Use Value: Limits transient voltage to ≤21.5V, preventing damage to 24V-tolerant input buffers while maintaining <5µA leakage at 13V nominal. |
Use Scenario: Low-voltage sensor inputs (e.g., door latch, seat position) connected to BCM microcontroller GPIOs. IC Role / Device Role: Bidirectional ESD clamp on LIN bus or analog sensor lines subject to ±8kV contact discharge. Use Value: Symmetric clamping ensures equal protection for both polarities; 150°C rating supports under-hood placement near fuse boxes. |
| USB 2.0 Data Line Protection | RS-485 Transceiver Port Protection |
Use Scenario: D+ and D– lines of USB host ports subjected to human-body-model ESD events during cable insertion. IC Role / Device Role: Secondary-level TVS after common-mode choke, placed adjacent to USB connector. Use Value: 21.5V clamping stays below USB 2.0 eye diagram voltage ceiling (3.6V differential + 18V common-mode margin), preserving signal integrity. |
Use Scenario: Termination points of RS-485 differential pairs in building automation nodes exposed to ground potential differences. IC Role / Device Role: Bi-directional clamp across A/B lines and to ground, absorbing common-mode surges up to 400W. Use Value: Matches RS-485 receiver common-mode range (–7V to +12V); 18.6A IPP handles induced surges from nearby AC motor switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA-13 | Same VRWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600W PPK rating | Higher power handling suits higher-energy surge environments (e.g., outdoor telecom cabinets) | Select when board space allows larger footprint and >400W margin is required |
| P6SMB13CA | Identical electrical specs; same SMB package but different branding and tape/reel packaging standard | No functional difference; may differ in RoHS compliance documentation or traceability reporting | Use when sourcing flexibility or dual-sourcing strategy requires alternate distributor SKUs |
Compared with SMBJ13CA-13 and P6SMB13CA, SMAJ13CA-13 offers optimal balance of 400W surge capability and compact SMA footprint - ideal for space-constrained industrial sensors and USB peripherals where thermal mass is limited and layout density is high.
Availability
SMAJ13CA-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive BCM inputs, USB 2.0 data line hardening, and RS-485 transceiver port protection requiring stable component supply across extended production lifecycles.
Supply support for SMAJ13CA-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 centers across Asia and Europe and ISO/TS 16949-certified manufacturing facilities.
SMAJxxCA is part of Diodes' TVS Diode portfolio targeting board-level ESD and surge protection, engineered specifically for high-reliability industrial, automotive, and communications equipment with stringent AEC-Q200 alignment.
FAQ
Is SMAJ13CA-13 unidirectional or bidirectional?
SMAJ13CA-13 is explicitly bi-directional, indicated by the "C" suffix per Diodes' naming convention. It has symmetrical breakdown behavior on both terminals, enabling protection of AC-coupled or differential signal paths without polarity concerns. No cathode band marking is present on the SMA body.
What is the maximum clamping voltage at rated peak current?
The maximum clamping voltage (VC) is 21.5V at a peak pulse current (IPP) of 18.6A, measured using the standard 8.3ms half-sine waveform. This value is guaranteed across the full operating temperature range and defines the worst-case overvoltage imposed on protected circuitry during surge events.
Can SMAJ13CA-13 replace SMAJ13A-13 in an existing design?
No - SMAJ13A-13 is unidirectional with a cathode band and asymmetric I-V curve, while SMAJ13CA-13 is bidirectional with no polarity marking. Substitution requires verification that the protected circuit does not rely on DC blocking or rectification behavior, and that layout accommodates non-polarized placement.
Does SMAJ13CA-13 meet automotive qualification standards?
SMAJ13CA-13 is not AEC-Q200 qualified per Diodes' official documentation, though its –55°C to +150°C operating range and robust surge performance make it suitable for non-safety-critical automotive applications like body electronics. For AEC-Q200-compliant alternatives, consult Diodes' Automotive TVS portfolio (e.g., D3SB13C).
SMAJ13CA-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ13CA-13 FAQ
1.How can I place an order for SMAJ13CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CA-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 SMAJ13CA-13 reliable?
The price and inventory of SMAJ13CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CA-13 is usually 5 days.
3.What payment methods are accepted for SMAJ13CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CA-13?
SMAJ13CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CA-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 SMAJ13CA-13?
For technical support, including SMAJ13CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CA-13 requirements.
6.How does Aetrix verify that SMAJ13CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ13CA-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 SMAJ13CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ13CA-13?
All SMAJ13CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CA-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 SMAJ13CA-13 part is unused and in its original packaging.
Return procedure for SMAJ13CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13CA-13 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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Diodes Incorporated
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