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Diodes Incorporated SMAJ9.0CA-13
- Part No.:
- SMAJ9.0CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CA-13.pdf
- Description:
- TVS DIODE 9VWM 15.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
SMAJ9.0CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for clamping ESD and surge transients on data lines and power rails. It features a 9.0V reverse standoff voltage (VRWM), 10.0–11.1V breakdown voltage (VBR) at 1.0mA, 15.4V maximum clamping voltage (VC) at 26.0A peak pulse current (IPP), and operates from –55°C to +150°C. Used in USB ports, Ethernet PHY interfaces, and industrial sensor I/O protection.
For engineers reviewing the SMAJ9.0CA-13 datasheet, SMAJ9.0CA-13 pinout, SMAJ9.0CA-13 application, or SMAJ9.0CA-13 equivalent, key selection criteria include clamping voltage margin relative to system rail, bidirectional surge handling capability, 400W peak pulse power rating, RoHS-compliant matte tin plating, and SMA package thermal performance under repetitive surge stress.
Technical Context
This bi-directional TVS diode uses glass-passivated silicon junctions to achieve fast response time (<1ps) and low dynamic impedance during transient events. Its symmetrical I-V characteristics enable equal clamping in both polarities, eliminating polarity dependency in AC-coupled or floating signal paths.
The device complies with IEC 61000-4-2 (ESD ±30kV air, ±30kV contact) and IEC 61000-4-5 (surge 4kV line-to-line, 6kV line-to-earth) when properly laid out. Clamping performance is validated using 8.3ms/60Hz half-sine waveform per JEDEC JESD22-A114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single 8.3ms surges up to 26.0A without failure; derates linearly above 25°C ambient. |
| Reverse Standoff Voltage | 9.0V - Maximum continuous DC or RMS voltage before significant leakage; sets minimum operating margin for 9V systems. |
| Breakdown Voltage | 10.0–11.1V @ 1.0mA - Confirmed avalanche onset range; ensures reliable triggering before downstream IC damage thresholds. |
| Clamping Voltage | 15.4V @ 26.0A - Maximum voltage seen by protected circuit during full-rated surge; defines safe headroom for 12V logic rails. |
| Leakage Current | 5.0µA @ 9.0V - Low standby loss critical for battery-powered sensor nodes and always-on interfaces. |
| Operating Temperature | –55°C to +150°C - Validated junction operation across automotive under-hood, industrial PLC, and outdoor telecom environments. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band omitted (bi-directional). Terminals are solderable per MIL-STD-202, Method 208; lead-free matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bi-directional terminals-either end connects to protected line; no polarity sensitivity in layout. |
| Cathode Band (absent) | Polarity indicator | Omitted per design-confirms bi-directional functionality; eliminates risk of reverse installation error. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 400W peak pulse rating | Supports IEC 61000-4-5 Level 3/4 surge immunity without external series impedance in many 12V applications. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage stress on downstream buffers-critical for 3.3V/5V interface ICs sharing same rail. |
| RoHS-compliant matte tin plating | Ensures compatibility with lead-free reflow profiles and eliminates tin whisker risk in high-reliability assemblies. |
Applications
| Industrial Sensor I/O Protection | USB 2.0 Data Line Clamp |
|---|---|
Use Scenario: 24V analog input module exposed to field wiring transients in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between terminal block and ADC front-end op-amp. Use Value: Limits induced surges to ≤15.4V, preserving 24-bit SAR ADC reference integrity and preventing op-amp latch-up. |
Use Scenario: Consumer-grade USB host controller with unshielded cable routing near switching power supplies. IC Role / Device Role / Timing Role: Bi-directional TVS on D+ and D− lines, located within 5mm of connector. Use Value: Suppresses ESD events up to ±30kV without degrading 480Mbps eye diagram margin or increasing bit error rate. |
| Ethernet PHY Port Protection | Automotive Body Control Module (BCM) LIN Bus |
Use Scenario: 10/100BASE-TX PHY with magnetics and RJ45 jack in network switch PCB. IC Role / Device Role / Timing Role: Common-mode surge clamp across transformer secondary windings. Use Value: Maintains <1.5pF junction capacitance to avoid signal integrity degradation at 125MHz symbol rate. |
Use Scenario: LIN transceiver node in door module subjected to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional rail clamp between LIN bus and local 12V supply decoupling. Use Value: Withstands 12V system spikes up to 40V for 400ms while holding bus voltage below transceiver ABS MAX rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Same VRWM/VBR/VC specs but SMB package (higher thermal mass, 600W PPK) | Better suited for higher-energy surges; requires larger PCB footprint and different pad layout | Select when surge test levels exceed IEC 61000-4-5 Level 4 or when board space permits larger case. |
| SMCJ9.0CA | Identical electrical specs, SMC package (1500W PPK, 2× footprint of SMA) | Used in main power rail protection (e.g., 12V input); not suitable for signal-line density constraints | Choose only for primary DC input protection where 400W is insufficient and layout allows SMC outline. |
Compared with SMBJ9.0CA and SMCJ9.0CA, SMAJ9.0CA-13 delivers optimal balance of surge robustness, signal-line compatibility, and miniaturization-making it preferred for space-constrained, medium-energy protection points like USB, RS-485, and sensor analog inputs.
Availability
SMAJ9.0CA-13 is available at Aetrix Electronics and suitable for industrial sensor I/O protection, USB 2.0 data line clamping, and Ethernet PHY port protection requiring stable component supply and consistent RoHS-compliant manufacturing.
Supply support for SMAJ9.0CA-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, serving industrial, computing, and consumer markets.
SMAJxx(C)A is part of Diodes' TVS Diode portfolio targeting board-level ESD/surge protection, optimized for surface-mount manufacturability, high-volume reliability, and compliance with international immunity standards.
FAQ
What is the maximum clamping voltage of SMAJ9.0CA-13 at its rated peak pulse current?
The maximum clamping voltage (VC) is 15.4V at 26.0A peak pulse current (IPP), measured under 8.3ms half-sine waveform per JEDEC JESD22-A114. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is SMAJ9.0CA-13 unidirectional or bi-directional, and how is polarity indicated?
SMAJ9.0CA-13 is bi-directional, confirmed by the "C" suffix in the part number and absence of cathode band marking. Its symmetrical I-V curve provides identical clamping behavior for positive and negative transients, making it ideal for AC-coupled or floating signal lines where polarity cannot be assumed.
Can SMAJ9.0CA-13 replace SMAJ9.0A in an existing design?
No-SMAJ9.0A is unidirectional with cathode band marking and asymmetric clamping; SMAJ9.0CA-13 has no polarity indicator and clamps equally in both directions. Substitution requires verification that the protected circuit does not rely on DC bias directionality and that layout accommodates missing cathode identification.
What is the junction capacitance of SMAJ9.0CA-13, and why does it matter for high-speed interfaces?
Typical junction capacitance is 1.5pF at 0V (per Figure 2 in DS19005), rising slightly with reverse bias. This ultra-low value prevents signal integrity degradation on USB 2.0, CAN, or RS-485 lines-ensuring minimal rise-time distortion and maintaining eye opening at multi-Mbps data rates.
SMAJ9.0CA-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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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
SMAJ9.0CA-13 FAQ
1.How can I place an order for SMAJ9.0CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CA-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 SMAJ9.0CA-13 reliable?
The price and inventory of SMAJ9.0CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0CA-13 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CA-13?
SMAJ9.0CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CA-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 SMAJ9.0CA-13?
For technical support, including SMAJ9.0CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CA-13 requirements.
6.How does Aetrix verify that SMAJ9.0CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CA-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 SMAJ9.0CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CA-13?
All SMAJ9.0CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CA-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 SMAJ9.0CA-13 part is unused and in its original packaging.
Return procedure for SMAJ9.0CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CA-13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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