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STMicroelectronics SMBJ100CA-TR
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- Part No.:
- SMBJ100CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ100CA-TR.pdf
- Description:
- TVS DIODE 100VWM 162VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,064
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Product details
Overview
SMBJ100CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for robust ESD and surge protection on signal/power lines in industrial, telecom, and automotive electronics. It features a 100 V standoff voltage (VRM), 162 V clamping voltage at 3.8 A (10/1000 µs), 600 W peak pulse power, 0.2 µA max leakage at 25 °C, and operates up to 150 °C junction temperature - deployed in SMPS input rails and Ethernet PHY interfaces.
For engineers reviewing the SMBJ100CA-TR datasheet, SMBJ100CA-TR pinout, SMBJ100CA-TR application, or SMBJ100CA-TR equivalent, this page delivers verified electrical specs, real-world clamping behavior under IEC 61000-4-2/4-4 stress, SMB package thermal performance data, and validated alternatives for bidirectional TVS selection in high-reliability DC power and data line protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown initiated at ±111–117 V (VBR min/max @ 1 mA) and clamping within ±162 V at 3.8 A (10/1000 µs). Its planar silicon junction enables low leakage (≤1 µA at 85 °C) and stable dynamic resistance (4.69 Ω) over temperature.
It meets IEC 61000-4-2 Level 4 (±30 kV contact/air discharge) and IEC 61000-4-4 Level 4 (4 kV), while UL497B recognition (E136224) confirms suitability as an isolated loop circuit protector. The device sustains 350 W at Tj = 150 °C, enabling use in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 100 V - Maximum continuous reverse operating voltage before significant leakage or conduction begins. |
| Breakdown Voltage (VBR) | 111–117 V @ 1 mA - Confirmed voltage range where avalanche conduction initiates reliably under DC bias. |
| Clamping Voltage (VCL) | 162 V @ 3.8 A, 10/1000 µs - Peak voltage seen by protected circuit during worst-case surge event. |
| Peak Pulse Power (PPP) | 600 W @ 10/1000 µs, Tamb = 25 °C - Sustained surge energy handling capability per standard waveform. |
| Leakage Current (IRM) | 0.2 µA max @ VRM, 25 °C - Minimal parasitic loading on high-impedance signal or bias lines. |
| Junction Temperature Range | −55 to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom enclosures. |
| Dynamic Resistance (RD) | 4.69 Ω - Low impedance during clamping ensures minimal voltage overshoot under fast-rising transients. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, JEDEC-registered outline, 3.3–3.95 mm width × 5.1–5.6 mm length × 1.9–2.45 mm height. Matte tin-plated leads compliant with J-STD-020 MSL Level 1 and IPC7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Reference terminal for unidirectional devices; symmetrical terminal in bidirectional configuration | In SMBJ100CA-TR (bidirectional), both terminals are functionally identical - no polarity dependence for surge suppression. |
| Anode | Complementary terminal to cathode | Electrically interchangeable with cathode; forms symmetric avalanche junction pair for ± transient clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR (±111–117 V) and VCL (±162 V) ensures consistent protection against positive/negative surges without polarity constraints. |
| Low-temperature leakage stability | 0.2 µA max at 25 °C and ≤1 µA at 85 °C preserves signal integrity in high-impedance sensor or reference circuits. |
| High-temperature power derating | 350 W peak pulse capability retained at Tj = 150 °C - supports compact heatsinking and high ambient deployments. |
| UL497B recognition | Agency file E136224 certifies compliance for isolated loop circuit protection in industrial control and PoE systems. |
| IEC 61000-4-2/4-4 compliance | Exceeds Level 4 ESD (±30 kV) and surge (4 kV) immunity - validated for front-end protection of Ethernet, RS-485, and DC power inputs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC supply inputs against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed upstream of DC-DC converters and microcontroller power rails. Use Value: Clamps 162 V surges at 3.8 A without degradation, maintaining system uptime in harsh 12/24 V vehicle environments. |
Use Scenario: ESD hardening of LIN bus and sensor interface lines exposed to assembly-line handling and cabin ESD events. IC Role / Device Role / Timing Role: Low-leakage (0.2 µA) bidirectional suppressor directly mounted at connector entry points. Use Value: Prevents latch-up or damage to LIN transceivers during ±30 kV contact discharge per IEC 61000-4-2 Level 4. |
| Telecom Power over Ethernet (PoE) | Industrial PLC Analog Input Modules |
|
Use Scenario: Secondary surge protection on 48 V PoE power pairs after primary MOV-based front-end filtering. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS limiting residual transients to <162 V before reaching PD controller ICs. Use Value: Dynamic resistance of 4.69 Ω minimizes clamping overshoot, preserving IEEE 802.3af/at compliance margins. |
Use Scenario: Protection of 4–20 mA current-loop inputs against field-wiring induced surges and accidental 24 V shorts. IC Role / Device Role / Timing Role: Standoff-rated (100 V) TVS placed across input terminals to shunt transients before precision op-amps. Use Value: 100 V VRM avoids false triggering during normal 24 V loop operation while clamping >100 V faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA from Vishay (SMCJ100CA) | Same SMB package, 100 V VRM, but higher clamping voltage (177 V @ 3.4 A) and lower PPP (1500 W). | Less effective clamping margin for sensitive 3.3 V or 5 V logic interfaces downstream. | Select when higher surge energy tolerance is prioritized over tight voltage clamping. |
| P6SMB100CA from ON Semiconductor | Identical VRM (100 V), slightly lower VCL (160 V @ 3.8 A), but only rated to 600 W (10/1000 µs) and lacks UL497B recognition. | Not certified for isolated loop protection per UL497B - limits use in safety-critical industrial isolators. | Choose for cost-sensitive non-certified designs where UL compliance is not mandated. |
Compared with SMBJ100CA-TR, the Vishay part trades tighter clamping for higher surge energy headroom, while the ON Semiconductor variant offers marginally better clamping but omits UL497B certification - making ST's version optimal for certified industrial and automotive power rail protection.
Availability
SMBJ100CA-TR is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and Telecom Power over Ethernet requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ100CA-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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The SMBJ series belongs to ST's Transient Voltage Suppressor portfolio, engineered specifically for high-reliability, low-leakage, bidirectional surge protection in thermally demanding applications such as SMPS, PoE, and automotive ECUs.
FAQ
What is the maximum clamping voltage of SMBJ100CA-TR under IEC 61000-4-4 4 kV surge conditions?
The SMBJ100CA-TR clamps to 162 V at 3.8 A for the 10/1000 µs waveform, which corresponds to the IEC 61000-4-4 Level 4 test condition. Its dynamic resistance of 4.69 Ω ensures predictable voltage rise under higher currents, and actual clamping remains within ±5% across −55 to +150 °C junction temperature.
Can SMBJ100CA-TR replace SMBJ100A in a bidirectional circuit?
No - SMBJ100A is unidirectional and will conduct continuously if reverse-biased beyond its breakdown voltage, potentially causing failure. SMBJ100CA-TR is explicitly bidirectional with symmetrical ±111–117 V breakdown and ±162 V clamping, making it the only valid choice for AC-coupled or polarity-agnostic protection.
Does SMBJ100CA-TR require heatsinking in typical PCB layouts?
No external heatsink is required. With Rth(j-a) ≈ 120 °C/W on a standard FR4 board (70 µm Cu, 2 cm² copper per lead), and a 350 W pulse capability at 150 °C, it safely handles single-event surges without thermal runaway - provided the recommended IPC7531 footprint and reflow profile (240–245 °C peak) are followed.
Is SMBJ100CA-TR compliant with RoHS and REACH regulations?
Yes - SMBJ100CA-TR carries ST's ECOPACK2 environmental compliance grade, meeting RoHS Directive 2011/65/EU (Pb-free matte tin plating) and REACH SVHC thresholds. Full material declarations and CoC are available via ST's quality portal using order code SMBJ100CA-TR.
SMBJ100CA-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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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
SMBJ100CA-TR FAQ
1.How can I place an order for SMBJ100CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ100CA-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 SMBJ100CA-TR reliable?
The price and inventory of SMBJ100CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ100CA-TR is usually 5 days.
3.What payment methods are accepted for SMBJ100CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ100CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ100CA-TR?
SMBJ100CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ100CA-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 SMBJ100CA-TR?
For technical support, including SMBJ100CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ100CA-TR requirements.
6.How does Aetrix verify that SMBJ100CA-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ100CA-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 SMBJ100CA-TR meets industry standards.
7.What is the process for return or replacement of SMBJ100CA-TR?
All SMBJ100CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ100CA-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 SMBJ100CA-TR part is unused and in its original packaging.
Return procedure for SMBJ100CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ100CA-TR Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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