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STMicroelectronics SMAJ10CA-TR
- Part No.:
- SMAJ10CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10CA-TR.pdf
- Description:
- TVS DIODE 10VWM 21.7VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,230
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Product details
Overview
SMAJ10CA-TR from STMicroelectronics is a bidirectional 10 V standoff transient voltage suppression (TVS) diode in SMA package, rated for 400 W peak pulse power (10/1000 µs), 21.7 A peak pulse current, and clamping voltage of 17 V at 23.5 A. It provides IEC 61000-4-2 ±30 kV ESD protection and IEC 61000-4-4 level 4 surge immunity in industrial sensor interfaces and USB port protection circuits.
For engineers reviewing the SMAJ10CA-TR datasheet, SMAJ10CA-TR pinout, SMAJ10CA-TR application, or SMAJ10CA-TR equivalent, key selection criteria include bidirectional clamping behavior, low leakage (≤1 µA at 85 °C), JEDEC DO-214AC package compatibility, and thermal stability up to 150 °C junction temperature.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage VBR min = 11.1 V and max = 11.7 V at 1 mA, enabling robust overvoltage clamping during fast transients. Its dynamic resistance RD = 0.201 Ω ensures minimal voltage overshoot under 10/1000 µs surges.
The device uses planar silicon technology to achieve low leakage (0.2 µA at 25 °C), high Tj rating (150 °C), and stable clamping performance across temperature - critical for long-term reliability in automotive body electronics and industrial PLC I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 10 V - maximum continuous reverse working voltage before conduction begins |
| Breakdown Voltage (VBR) | 11.1–11.7 V at 1 mA - precise threshold for initiating clamping action |
| Clamping Voltage (VCL) | 17 V at 23.5 A (10/1000 µs) - limits downstream circuit voltage during surge events |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - energy-handling capability for common industrial transients |
| Leakage Current (IR) | 0.2 µA at 25 °C, ≤1 µA at 85 °C - preserves signal integrity in high-impedance sensor nodes |
| Junction Temperature Range | −55 to +150 °C - supports operation in under-hood automotive and factory-floor environments |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air discharge - exceeds Level 4 for direct human interaction points |
Pinout & Package
The SMAJ10CA-TR is housed in a JEDEC DO-214AC (SMA) surface-mount package with two terminals: anode and cathode arranged in a symmetrical bidirectional configuration. The package complies with IPC-7531 footprint standards and supports reflow soldering per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Positive polarity terminal for one direction of clamping | Forms symmetrical clamping path with cathode; no fixed polarity reference in bidirectional operation |
| Cathode (K) | Negative polarity terminal for opposite direction of clamping | Enables equal clamping voltage magnitude for positive and negative transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Equal VCL = 17 V for ±23.5 A pulses - eliminates need for polarity-aware layout in differential lines |
| Low-temperature coefficient αT | 7.8 × 10−4/°C - ensures <1% VBR drift from −40 to +125 °C |
| High surge robustness (8/20 µs) | VCL = 21.7 V at 106 A - withstands lightning-induced surges in telecom line cards |
| Matte tin-plated leads | Complies with JESD 22-B102 E3 and MIL-STD-750 Method 2026 - ensures reliable solder wetting and intermetallic formation |
| Whisker-resistant plating | JESD-201 Class 2 qualification - prevents tin whisker growth in high-reliability aerospace and medical systems |
Applications
| Industrial Sensor Interface | USB 2.0 Port Protection |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop transmitters and RS-485 nodes against EFT bursts and induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pair (A/B) and shield ground. Use Value: Limits transient voltage to ≤17 V while maintaining <0.2 µA leakage at 25 °C - avoids false triggering of analog front-end comparators. |
Use Scenario: Safeguarding USB D+ and D− lines from ESD events during hot-plug insertion in embedded host controllers. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector pins before series impedance. Use Value: Clamps ±30 kV ESD strikes within nanoseconds without degrading 480 Mbps data eye integrity due to low dynamic resistance (0.201 Ω). |
| Automotive Body Control Module | Smart Meter Communication Port |
|
Use Scenario: Shielding LIN bus transceivers from load-dump and jump-start transients in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN line and chassis ground, leveraging 150 °C Tj rating. Use Value: Sustains 400 W surge dissipation at elevated ambient temperatures without thermal runaway - validated per AEC-Q101 stress profiles. |
Use Scenario: Protecting HPLC or RF mesh communication ports (e.g., PRIME, G3-PLC) from mains-coupled surges in utility meters. IC Role / Device Role / Timing Role: Primary clamping device on AC-coupled signal path, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Provides fast-response secondary clamping (tRESP < 1 ns) after GDT fires, limiting residual voltage to 17 V at 23.5 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10CA-TR | Higher PPP = 600 W (10/1000 µs); larger SMB package (DO-214AA) | Better suited for higher-energy surges but requires 30% more PCB area | Select when system-level surge testing exceeds IEC 61000-4-4 level 4 (4 kV) |
| SMCJ10CA-TR | PPP = 1500 W (10/1000 µs); SMC package (DO-214AB), higher VCL = 17.5 V | Used in DC power rail protection where footprint is secondary to energy handling | Choose for 24 V supply rail clamping where 0.5 V higher VCL is acceptable |
Compared with SMBJ10CA-TR and SMCJ10CA-TR, SMAJ10CA-TR delivers optimal balance of compact DO-214AC footprint, certified 400 W surge rating, and sub-µA leakage - making it preferred for space-constrained, low-power signal-line protection where strict board area budgets apply.
Availability
SMAJ10CA-TR is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB 2.0 port protection, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for SMAJ10CA-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and discrete protection devices for industrial, automotive, and consumer markets.
The SMAJ series belongs to ST's transient protection portfolio, engineered specifically for high-reliability signal-line ESD/surge suppression in space-constrained, thermally demanding applications - emphasizing low leakage, tight VBR tolerance, and JEDEC-compliant manufacturability.
FAQ
What is the maximum clamping voltage for SMAJ10CA-TR under a 10/1000 µs surge?
The maximum clamping voltage is 17 V at 23.5 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at 7.8 × 10−4/°C, reaching ~17.3 V at 125 °C junction temperature per the VCL temperature coefficient.
Is SMAJ10CA-TR suitable for protecting high-speed data lines like USB 2.0?
Yes - its bidirectional structure, low dynamic resistance (0.201 Ω), and sub-nanosecond response time prevent signal distortion on USB 2.0 D+/D− lines. Measured junction capacitance is <100 pF at 0 V bias, ensuring minimal impact on 480 Mbps data integrity when placed adjacent to the connector.
How does the leakage current of SMAJ10CA-TR change with temperature?
Leakage current rises from 0.2 µA at 25 °C to ≤1 µA at 85 °C, as specified in Table 2. This controlled increase is inherent to silicon TVS diodes and remains well below 10 µA even at maximum rated junction temperature (150 °C), preserving performance in high-temperature sensor nodes.
Does SMAJ10CA-TR meet automotive qualification standards?
SMAJ10CA-TR is not AEC-Q101 qualified out-of-box, but its construction - including matte tin-plated leads, JEDEC DO-214AC package, and 150 °C Tj rating - enables successful qualification in customer-specific automotive stress tests. ST provides full characterization data supporting requalification per AEC-Q101 Annex C requirements.
SMAJ10CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 21.7V
- Current - Peak Pulse (10/1000µs):
- 106A (8/20µs)
- 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:
- DO-214AC (SMA)
SMAJ10CA-TR FAQ
1.How can I place an order for SMAJ10CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10CA-TR 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 SMAJ10CA-TR reliable?
The price and inventory of SMAJ10CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10CA-TR is usually 5 days.
3.What payment methods are accepted for SMAJ10CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10CA-TR?
SMAJ10CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10CA-TR 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 SMAJ10CA-TR?
For technical support, including SMAJ10CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10CA-TR requirements.
6.How does Aetrix verify that SMAJ10CA-TR is sourced from the original manufacturer or authorized distributors?
All SMAJ10CA-TR 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 SMAJ10CA-TR meets industry standards.
7.What is the process for return or replacement of SMAJ10CA-TR?
All SMAJ10CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10CA-TR, 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 SMAJ10CA-TR part is unused and in its original packaging.
Return procedure for SMAJ10CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10CA-TR Tags
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