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STMicroelectronics SMAJ5.0CA-TR
- Part No.:
- SMAJ5.0CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CA-TR.pdf
- Description:
- TVS DIODE 5VWM 13.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:24,760
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Product details
Overview
SMAJ5.0CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for ESD and surge protection in low-voltage signal lines and power rails. It features a 5.0 V standoff voltage (VRM), 9.2 V clamping voltage at 43.5 A (10/1000 µs), 400 W peak pulse power, and operates up to 150 °C junction temperature - deployed in USB ports, HDMI interfaces, and industrial sensor I/O circuits.
For engineers reviewing the SMAJ5.0CA-TR datasheet, SMAJ5.0CA-TR pinout, SMAJ5.0CA-TR application, or SMAJ5.0CA-TR equivalent, key selection criteria include bidirectional clamping behavior, low leakage (<0.2 µA @ 25 °C), JEDEC DO-214AC (SMA) package compatibility, and IEC 61000-4-2 level 4 (±30 kV contact/air) compliance.
Technical Context
This TVS diode uses planar silicon junction technology to achieve stable breakdown characteristics and low dynamic resistance (0.049 Ω at 10/1000 µs). Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity biasing - critical for AC-coupled or floating signal paths like RS-485 or audio lines.
The device meets MIL-STD-883 method 3015 for ESD robustness and IEC 61000-4-4 level 4 (4 kV) for electrical fast transients. Thermal design is supported by a maximum junction temperature of 150 °C and validated reflow profile per J-STD-020 MSL level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 5.0 V - Maximum continuous reverse operating voltage before significant leakage or conduction begins. |
| Breakdown Voltage (VBR) | 6.40–6.74 V @ 10 mA - Confirmed minimum/typical avalanche onset under DC test conditions. |
| Clamping Voltage (VCL) | 9.2 V @ 43.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge event. |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - Sustained energy-handling capability for standard lightning/surge waveforms. |
| Leakage Current (IRM) | 0.2 µA @ 25 °C - Ensures minimal loading on high-impedance analog or reference nodes. |
| Junction Temperature Range | −55 to +150 °C - Validated operation across extended industrial and automotive ambient conditions. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air discharge) - Full immunity to human-body-model ESD events. |
Pinout & Package
Package: DO-214AC (SMA), JEDEC registered, IPC-7531 compliant footprint, matte tin-plated leads, MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Anode/Cathode Reference | Bidirectional symmetry means either terminal serves as anode or cathode depending on polarity of transient - no fixed functional assignment. |
| Anode (Unmarked End) | Anode/Cathode Reference | Identical physical terminal; device conducts identically in both directions above VBR threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Enables single-device protection of AC signals or ungrounded buses without polarity constraints. |
| Low Dynamic Resistance | 0.049 Ω (10/1000 µs) - Minimizes voltage overshoot during high-current surges. |
| High-Temperature Reliability | Rated for 150 °C junction operation - supports placement near heat sources or in sealed enclosures. |
| Low-Leakage Planar Junction | 0.2 µA @ 25 °C - Preserves signal integrity in precision analog front-ends and battery-powered sensors. |
| IEC 61000-4-2 Level 4 Compliance | ±30 kV contact/air discharge - Meets highest common ESD immunity requirement for end-user interfaces. |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− differential pairs against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector, clamping transients before they reach USB transceiver IC. Use Value: Prevents latch-up or damage to PHY layer while maintaining <1 pF junction capacitance - no signal integrity degradation at 480 Mbps. |
Use Scenario: Shielding TMDS clock and data channels from electrostatic discharge in consumer AV equipment. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at HDMI receptacle, shunting ESD energy away from serializer/deserializer ICs. Use Value: Enables full compliance with IEC 61000-4-2 level 4 (±30 kV) without degrading 1080p/4K video timing margins. |
| Industrial Sensor I/O | RS-485 Transceiver Ports |
|
Use Scenario: Safeguarding 4–20 mA loop-powered sensor outputs against field-induced surges in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and PLC input, absorbing 4 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal accuracy over full temperature range (−40 to +85 °C ambient) due to stable VBR drift coefficient (5.7 × 10⁻⁴/°C). |
Use Scenario: Protecting half-duplex RS-485 bus nodes from ground potential differences and lightning-induced surges. IC Role / Device Role / Timing Role: TVS connected line-to-line (A–B) and line-to-ground on each node, clamping common-mode transients. Use Value: Supports multi-drop networks with >1 km cable runs by limiting clamping voltage to 9.2 V - well below transceiver absolute max ratings. |
Availability
SMAJ5.0CA-TR is available at Aetrix Electronics and suitable for USB interface protection, HDMI port hardening, and industrial sensor I/O requiring stable component supply across production lifecycles.
Supply support for SMAJ5.0CA-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 devices, sensors, and protection components for industrial, automotive, and consumer applications.
The SMAJ series belongs to ST's transient protection product line, engineered specifically for high-reliability ESD and surge suppression in space-constrained, thermally demanding PCB layouts.
FAQ
What is the difference between SMAJ5.0A-TR and SMAJ5.0CA-TR?
SMAJ5.0A-TR is unidirectional and functions as a single-polarity clamp - conducting only when cathode is positive relative to anode. SMAJ5.0CA-TR is bidirectional, providing symmetrical clamping for both voltage polarities, making it suitable for AC-coupled or floating signal lines such as RS-485 or audio interfaces. Their VBR, VCL, and PPP values are identical under matched test conditions.
Can SMAJ5.0CA-TR be used in place of a 5.0 V Zener diode for voltage regulation?
No - SMAJ5.0CA-TR is not intended for DC voltage regulation. It exhibits high dynamic impedance outside its specified surge conditions and lacks tight tolerance or stable DC characteristics. Its VBR (6.40–6.74 V) and VCL (9.2 V) are surge-test parameters, not regulated output voltages. Use dedicated Zener or LDO regulators for steady-state voltage control.
Does SMAJ5.0CA-TR meet automotive AEC-Q200 requirements?
No - SMAJ5.0CA-TR is not AEC-Q200 qualified. While it operates from −55 to +150 °C and passes JEDEC reliability tests (MSL level 1, whisker testing), ST does not list it in their AEC-Q200 stress-tested portfolio. For automotive applications, consider ST's Automotive-grade SMxJ series or equivalent AEC-Q200-certified TVS devices.
How does junction temperature affect clamping performance?
VCL increases with junction temperature at a rate defined by αT = 5.7 × 10⁻⁴/°C. At 125 °C, VCL rises ~0.6 V above its 25 °C value (9.2 V → ~9.8 V). This is accounted for in system-level surge margin calculations and must be verified in thermal simulations where sustained power dissipation occurs near hot components.
SMAJ5.0CA-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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 174A (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)
SMAJ5.0CA-TR FAQ
1.How can I place an order for SMAJ5.0CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CA-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 SMAJ5.0CA-TR reliable?
The price and inventory of SMAJ5.0CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CA-TR is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CA-TR?
SMAJ5.0CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CA-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 SMAJ5.0CA-TR?
For technical support, including SMAJ5.0CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CA-TR requirements.
6.How does Aetrix verify that SMAJ5.0CA-TR is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CA-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 SMAJ5.0CA-TR meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CA-TR?
All SMAJ5.0CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CA-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 SMAJ5.0CA-TR part is unused and in its original packaging.
Return procedure for SMAJ5.0CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CA-TR Tags
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