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STMicroelectronics SMBJ58CA-TR
- Part No.:
- SMBJ58CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ58CA-TR.pdf
- Description:
- TVS DIODE 58VWM 93.6VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,329
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Product details
Overview
SMBJ58CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in SMB package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact) and IEC 61000-4-4 surge immunity (4 kV level 4). It features 58 V standoff voltage (VRM), 93.6 V clamping voltage at 6.7 A (10/1000 µs), 600 W peak pulse power, and operates up to 150 °C junction temperature - deployed on industrial I/O lines, telecom interfaces, and automotive body control modules.
For engineers reviewing the SMBJ58CA-TR datasheet, SMBJ58CA-TR pinout, SMBJ58CA-TR application, or SMBJ58CA-TR equivalent, this page delivers verified electrical parameters, thermal derating behavior, UL497B recognition status, SMB package footprint compliance (IPC7531), and real-world clamping performance under 8/20 µs and 10/1000 µs transients - critical for robust overvoltage design in high-reliability systems.
Technical Context
This bidirectional TVS diode uses planar silicon junction technology to achieve low leakage (≤0.2 µA at 25 °C), stable clamping across temperature (αT = 10.4 × 10⁻⁴/°C), and fast response (<1 ns). Its symmetrical breakdown characteristic enables protection of AC-coupled or differential signal paths without polarity constraints.
The device meets UL497B recognition as an isolated loop circuit protector (E136224), complies with IEC 61000-4-2 level 4 (30 kV), IEC 61000-4-4 level 4 (4 kV), and supports reflow soldering per J-STD-020 MSL level 1 - confirming suitability for automated SMT assembly in harsh-environment electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 58 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR min) | 64.4 V at 1 mA - guaranteed conduction onset under DC stress, enabling precise overvoltage threshold setting |
| Clamping Voltage (VCL) | 93.6 V at 6.7 A (10/1000 µs) - limits transient-induced voltage seen by downstream ICs to safe levels |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - sustains short-duration surges without failure, derated to 350 W at 150 °C Tj |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby current draw, preserving signal integrity and battery life in always-on circuits |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in extended-temperature industrial and automotive under-hood environments |
| ESD Withstand (IEC 61000-4-2) | 30 kV air discharge / 30 kV contact discharge - exceeds level 4, eliminating need for external ESD staging |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, JEDEC-registered outline, matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 method 2026. Dimensions: 3.3–3.95 mm length × 5.1–5.6 mm width × 2.0–2.45 mm height (A2 = 0.05–0.20 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Reference terminal for unidirectional version; symmetric terminal in bidirectional configuration | In SMBJ58CA-TR, both terminals are functionally identical - no polarity sensitivity; used as common node for differential or AC line protection |
| Anode (Opposite Band) | Reference terminal for unidirectional version; symmetric terminal in bidirectional configuration | Electrically interchangeable with cathode in CA variant - enables placement flexibility on PCB without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of AC signals, RS-485 buses, and Ethernet PHYs without polarity-aware routing or layout restrictions |
| UL497B recognition (E136224) | Validates use in isolated loop circuits for industrial process control and safety-critical sensor interfaces |
| Low dynamic resistance (RD = 3.34 Ω) | Minimizes voltage overshoot during fast transients, improving margin for 3.3 V/5 V logic-level ICs downstream |
| High-temperature reliability (Tj max = 150 °C) | Supports long-term operation in enclosed enclosures or near heat-generating components without derating penalties |
| JEDEC-compliant SMB footprint | Ensures mechanical compatibility with standard pick-and-place equipment and IPC7531-recommended land patterns |
Applications
| Industrial PLC Analog Input Modules | Automotive Body Control Unit (BCU) LIN Bus |
|---|---|
|
Use Scenario: Protects 4–20 mA current-loop inputs against field-induced surges and ESD events during sensor wiring maintenance. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±1 kV fast transients before reaching precision ADC front-end. Use Value: Prevents ADC saturation and latch-up while maintaining <0.2 µA leakage to avoid current-loop error accumulation. |
Use Scenario: Shields LIN transceiver pins from load-dump spikes and ESD during connector mating/unmating in door modules. IC Role / Device Role / Timing Role: Clamps transients to ≤93.6 V within <1 ns, ensuring LIN physical layer remains functional after 30 kV contact discharge. Use Value: Eliminates need for discrete RC filters or additional protection stages, reducing BOM count and board space. |
| Telecom Base Station RS-485 Data Links | Smart Meter Communication Interfaces |
|
Use Scenario: Guards half-duplex RS-485 transceivers on outdoor utility meter backhaul links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Limits induced 4 kV (IEC 61000-4-4 level 4) transients to safe levels for MAX1487/SP3485-level receivers. Use Value: Achieves 600 W surge handling without thermal runaway, validated per UL497B for isolated loop compliance. |
Use Scenario: Secures HAN (Home Area Network) interfaces like M-Bus or RF modules against ESD during field technician interaction. IC Role / Device Role / Timing Role: Provides symmetrical clamping on bidirectional data lines, preserving signal integrity during 30 kV air discharge events. Use Value: Maintains <10.4 × 10⁻⁴/°C voltage drift coefficient, ensuring consistent clamping across −40 °C to +85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA from Vishay (SMCJ58CA) | Same VRM (58 V), but higher clamping voltage (96.8 V @ 6.2 A) and lower PPP (1500 W vs 600 W rating) | Designed for higher-energy 10/1000 µs surges; less suitable for tight-clamp designs requiring <94 V ceiling | Select when system-level surge tests exceed IEC 61000-4-4 level 4 and require higher energy absorption |
| P6SMB58CA from ON Semiconductor | Identical VRM (58 V) and VCL (93.6 V), but higher leakage (1 µA @ 85 °C vs 0.2 µA @ 25 °C) and no UL497B recognition | Lacks isolated loop certification; not approved for safety-critical industrial loop-powered sensors | Prefer for cost-sensitive consumer applications where UL497B is not mandated and thermal leakage budget allows |
Compared with SMBJ58CA-TR, the Vishay SMCJ58CA offers higher surge capacity but looser clamping, while the ON Semiconductor P6SMB58CA matches clamping performance but omits UL497B validation and exhibits elevated high-temperature leakage - making the STMicroelectronics part optimal for certified industrial and automotive signal-line protection.
Availability
SMBJ58CA-TR is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive LIN bus nodes, telecom RS-485 links, and smart meter communication interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ58CA-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, delivering intelligent power, sensing, and connectivity solutions for industrial, automotive, and consumer markets.
The SMBJ series belongs to ST's transient protection portfolio, engineered specifically for high-reliability signal-line safeguarding in environments demanding UL497B compliance, extended temperature operation, and sub-microamp leakage - targeting industrial automation, automotive ECUs, and infrastructure communications.
FAQ
What is the difference between SMBJ58CA-TR and SMBJ58A-TR?
The "CA" suffix denotes bidirectional construction, meaning both terminals behave identically under reverse or forward transient stress - ideal for AC-coupled or differential lines like RS-485. The "A" variant is unidirectional, with distinct anode/cathode roles and asymmetric clamping; it requires correct polarity orientation during placement and is suited for DC-biased signal paths such as USB or CAN lines.
Does SMBJ58CA-TR meet automotive AEC-Q200 requirements?
No - SMBJ58CA-TR is not AEC-Q200 qualified. It is rated for industrial and commercial applications with Tj up to 150 °C and meets IEC/UL standards for surge and ESD protection, but lacks the extended temperature cycling, vibration, and humidity testing required for automotive qualification. For AEC-Q200-compliant alternatives, consider ST's Automotive-grade SMAJ58CA or similar qualified variants.
Can SMBJ58CA-TR be used in parallel to increase surge current handling?
Not recommended without derating analysis. Parallel connection introduces imbalance due to VBR mismatch (±5% tolerance), causing one device to absorb disproportionate current and fail prematurely. For higher IPP, select a single higher-rated device like 1.5KE56CA or use a TVS array with matched characteristics - verified via SPICE simulation and lab testing under actual surge waveforms.
What is the thermal resistance (Rth j-a) of SMBJ58CA-TR on a standard FR4 PCB?
On a 1 cm² copper pad per lead (recommended footprint), Rth j-a is approximately 120 °C/W for single-pulse conditions. With 2.5 cm² total copper area (1.25 cm² per lead), it drops to ~65 °C/W. This value is critical for calculating junction temperature rise during repetitive surges - e.g., 6.7 A pulses at 1 Hz yield ΔTj ≈ 435 °C without sufficient copper, necessitating thermal relief design per Figure 12 in DS1283.
SMBJ58CA-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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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
SMBJ58CA-TR FAQ
1.How can I place an order for SMBJ58CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ58CA-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 SMBJ58CA-TR reliable?
The price and inventory of SMBJ58CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ58CA-TR is usually 5 days.
3.What payment methods are accepted for SMBJ58CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ58CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ58CA-TR?
SMBJ58CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ58CA-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 SMBJ58CA-TR?
For technical support, including SMBJ58CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ58CA-TR requirements.
6.How does Aetrix verify that SMBJ58CA-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ58CA-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 SMBJ58CA-TR meets industry standards.
7.What is the process for return or replacement of SMBJ58CA-TR?
All SMBJ58CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ58CA-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 SMBJ58CA-TR part is unused and in its original packaging.
Return procedure for SMBJ58CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ58CA-TR Tags
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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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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