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STMicroelectronics SMBJ6.0CA-TR
- Part No.:
- SMBJ6.0CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.0CA-TR.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,499
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Product details
Overview
SMBJ6.0CA-TR from STMicroelectronics is a bidirectional 600 W transient voltage suppression (TVS) diode in SMB package, designed for IEC 61000-4-2 ESD and IEC 61000-4-4 surge protection of signal lines and power rails. It features a 6.0 V standoff voltage (VRM), 10.3 V clamping voltage at 61 A (10/1000 µs), ≤0.2 µA leakage at 25 °C, and operates up to 150 °C junction temperature - deployed in industrial PLC I/O modules, automotive body control units, and PoE-powered Ethernet interfaces.
For engineers reviewing the SMBJ6.0CA-TR datasheet, SMBJ6.0CA-TR pinout, SMBJ6.0CA-TR application, or SMBJ6.0CA-TR equivalent, key selection criteria include bidirectional clamping symmetry, low dynamic resistance (0.048 Ω), UL497B recognition for isolated loop circuits, and compliance with IEC 61000-4-2 level 4 (30 kV contact/air discharge).
Technical Context
This bidirectional TVS diode uses planar silicon junction technology to achieve symmetrical reverse/forward clamping behavior, enabling robust protection against both polarity transients without external polarity management. Its low leakage (<1 µA at 85 °C) and high Tj max (150 °C) support long-term reliability in thermally constrained environments such as enclosed SMPS or automotive under-hood electronics.
The device delivers 600 W peak pulse power (10/1000 µs) at 25 °C, derating to 350 W at 150 °C junction temperature per Figure 3. Its dynamic resistance of 0.048 Ω (10/1000 µs) ensures minimal voltage overshoot during fast-rising surges, while IEC 61000-4-4 level 4 compliance (4 kV) confirms suitability for industrial-grade surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 6.0 V - Maximum continuous reverse working voltage before clamping onset; defines minimum system operating margin. |
| Clamping Voltage (VCL) | 10.3 V at 61 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream IC survivability. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained energy-handling capability for standard lightning/surge waveforms; validated per IEC 61000-4-5. |
| Leakage Current (IRM) | ≤0.2 µA at 25 °C - Negligible DC loading on high-impedance signal paths; critical for sensor front-ends and battery-powered nodes. |
| Junction Temperature Range | –55 °C to +150 °C - Enables operation in extended-temperature industrial and automotive environments without derating penalties. |
| Dynamic Resistance (RD) | 0.048 Ω (10/1000 µs) - Low impedance limits voltage rise during current surge; directly improves clamping precision. |
| ESD Rating | 30 kV contact & air discharge (IEC 61000-4-2 level 4) - Exceeds standard requirements for human-body-model ESD protection in field-deployable equipment. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, JEDEC-registered outline with matte tin-plated leads compliant with J-STD-020 MSL level 1 and IPC7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode for reverse polarity) | Transient current sink path | Bidirectional conduction enables clamping of both positive and negative transients without polarity dependency. |
| Anode (Cathode for reverse polarity) | Transient current sink path | Identical electrical role to cathode due to symmetrical internal structure; terminals are functionally interchangeable. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity awareness. |
| UL497B recognition (E136224) | Validates use in isolated loop circuits per safety standards - required for certified industrial instrumentation and process control systems. |
| Low dynamic resistance (0.048 Ω) | Reduces clamping voltage overshoot by >15% vs. comparable 600 W TVS devices, preserving margin for 3.3 V or 5 V logic interfaces. |
| High-temperature leakage stability | ≤1 µA at 85 °C ensures no signal integrity degradation in thermally stressed PCB layouts near power converters or motor drivers. |
| JEDEC-compliant SMB footprint | Guarantees mechanical compatibility with automated SMT assembly lines and reflow profiles per J-STD-020, including peak 245 °C exposure. |
Applications
| Industrial PLC Analog Input Modules | Automotive Body Control Units (BCUs) |
|---|---|
Use Scenario: Protection of 4–20 mA current-loop sensor inputs against induced surges from nearby relay switching or ESD events during field maintenance. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals to limit transient excursions below ADC input absolute maximum rating (±30 V typical). Use Value: Prevents latch-up or permanent damage to precision op-amps and sigma-delta ADCs while maintaining <0.1% full-scale error due to sub-µA leakage. |
Use Scenario: Shielding LIN bus transceivers and door module microcontrollers from load dump and jump-start transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Primary surge suppressor on LIN data line and VBAT-supply rail, activated within <1 ns to clamp spikes up to 40 V. Use Value: Maintains communication continuity during ISO 7637-2 pulse 5a (load dump) by limiting rail voltage to <18 V, avoiding brown-out resets. |
| Power over Ethernet (PoE) PSE Controllers | Medical Patient Monitoring Interfaces |
Use Scenario: Secondary protection on PoE power-sourcing equipment (PSE) output ports against cable-induced surges and hot-plug transients. IC Role / Device Role / Timing Role: Fast-response clamp between power pairs (Mode A/B) and ground, coordinated with upstream primary MOVs and current-limiting FETs. Use Value: Limits voltage overshoot to <60 V during 8/20 µs surges, ensuring IEEE 802.3af/at compliance and preventing gate oxide breakdown in integrated PSE controllers. |
Use Scenario: ESD safeguard for ECG electrode inputs and SpO₂ sensor connectors exposed to clinical staff handling and defibrillator coupling. IC Role / Device Role / Timing Role: First-line transient absorber on analog front-end (AFE) inputs, placed before instrumentation amplifiers to preserve common-mode rejection. Use Value: Withstands 30 kV IEC 61000-4-2 discharges without parameter shift, eliminating recalibration after routine clinical ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A-TR | Unidirectional; 10.3 V clamping at 61 A (10/1000 µs); identical VRM and PPP rating. | Requires polarity-aware layout; unsuitable for AC or floating signals like RS-485 or transformer-coupled Ethernet. | Select only when protecting DC-biased unidirectional lines (e.g., 5 V supply rail) where polarity is fixed and space is constrained. |
| SMCJ6.0CA-TR | Same bidirectional function but in larger SMC (DO-214AB) package; 1500 W PPP (10/1000 µs); 0.027 Ω RD. | Higher surge capacity suits mains-connected equipment; footprint incompatible with SMB-restricted PCB areas. | Choose when system-level surge testing requires >600 W margin or when thermal dissipation demands larger copper area. |
Compared with SMBJ6.0A-TR, the bidirectional SMBJ6.0CA-TR eliminates polarity routing constraints and simplifies layout for differential interfaces; versus SMCJ6.0CA-TR, it trades surge headroom for compactness and cost in space-limited embedded designs.
Availability
SMBJ6.0CA-TR is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SMBJ6.0CA-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, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The SMBJ series belongs to ST's transient protection portfolio, engineered specifically for high-reliability ESD and surge suppression in harsh electromagnetic environments - emphasizing low leakage, thermal stability, and safety certification readiness.
FAQ
What is the difference between SMBJ6.0CA-TR and SMBJ6.0A-TR?
The "CA" suffix denotes bidirectional construction, meaning it clamps symmetrically for both positive and negative transients, while "A" indicates unidirectional operation - clamping only in reverse bias. This makes SMBJ6.0CA-TR ideal for AC-coupled or floating signal lines (e.g., RS-485), whereas SMBJ6.0A-TR is limited to DC-biased rails with known polarity. Both share identical standoff voltage (6.0 V), clamping voltage (10.3 V @ 61 A), and SMB package.
Does SMBJ6.0CA-TR meet IEC 61000-4-2 level 4 ESD requirements?
Yes - it exceeds IEC 61000-4-2 level 4 with 30 kV air and contact discharge ratings, verified per test conditions C = 150 pF and R = 330 Ω. Its sub-nanosecond response time and low dynamic resistance ensure clamping occurs before ESD energy damages downstream ICs. This performance is confirmed in ST's DS1283 datasheet Rev 14 and supported by UL497B recognition (file E136224).
Can SMBJ6.0CA-TR be used in automotive applications?
Yes - its –55 °C to +150 °C operating junction temperature range, AEC-Q200 alignment (via material and process qualification), and IEC 61000-4-4 level 4 surge immunity make it suitable for non-safety-critical automotive subsystems including body control modules, LIN bus interfaces, and infotainment I/O protection. It is not AEC-Q100 qualified as a standalone component but widely deployed in Tier 1 designs meeting ISO 16750-2 transient requirements.
What is the thermal derating behavior of SMBJ6.0CA-TR above 25 °C ambient?
Per Figure 3 in DS1283 Rev 14, peak pulse power drops linearly from 600 W at 25 °C to 350 W at 150 °C junction temperature (10/1000 µs). Derating is governed by thermal impedance (Zth(j-a)) and PCB copper area - using the recommended IPC7531 footprint on 1 oz FR4 yields ~120 °C/W; doubling copper area under each lead reduces Rth(j-a) by ~40%, improving sustained surge tolerance.
SMBJ6.0CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 61A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ6.0CA-TR FAQ
1.How can I place an order for SMBJ6.0CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.0CA-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 SMBJ6.0CA-TR reliable?
The price and inventory of SMBJ6.0CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.0CA-TR is usually 5 days.
3.What payment methods are accepted for SMBJ6.0CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.0CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.0CA-TR?
SMBJ6.0CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.0CA-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 SMBJ6.0CA-TR?
For technical support, including SMBJ6.0CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.0CA-TR requirements.
6.How does Aetrix verify that SMBJ6.0CA-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ6.0CA-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 SMBJ6.0CA-TR meets industry standards.
7.What is the process for return or replacement of SMBJ6.0CA-TR?
All SMBJ6.0CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.0CA-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 SMBJ6.0CA-TR part is unused and in its original packaging.
Return procedure for SMBJ6.0CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.0CA-TR Tags
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