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STMicroelectronics SMC30J36CA
- Part No.:
- SMC30J36CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J36CA.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
SMC30J36CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 58.1 V (max) under 48.4 A surge, and operates up to 175 °C junction temperature - enabling robust protection in industrial power supplies, telecom interfaces, and automotive body electronics.
For engineers reviewing the SMC30J36CA datasheet, SMC30J36CA pinout, SMC30J36CA application, or SMC30J36CA equivalent, key selection criteria include its 36 V standoff voltage, bidirectional polarity, low 0.2 µA leakage at 25 °C, JEDEC-registered SMC package, and IEC 61000-4-2 ±30 kV contact/air discharge compliance.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to electrostatic discharge and repetitive surges. Its bidirectional configuration enables symmetric clamping across both polarities without external circuitry, supporting AC-coupled or floating signal paths.
The device features a dynamic resistance of 63.2 mΩ (typical), enabling precise voltage clamping under high-current transients, and exhibits stable thermal performance with Tj max = 175 °C - critical for high-reliability applications in constrained thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 36 V - maximum continuous reverse operating voltage before breakdown begins; defines safe operating margin for 33–40 V nominal systems. |
| Breakdown Voltage (VBR min) | 40 V at 1 mA - guaranteed avalanche initiation threshold; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VCL max) | 58.1 V at 48.4 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 3000 W (10/1000 μs) - energy-handling capability for standard lightning/surge waveforms; supports IEC 61000-4-4 level 4 (4 kV). |
| Leakage Current (IRM) | 0.2 µA at VRM = 36 V and 25 °C - negligible standby power loss; preserves signal integrity in high-impedance sensor or reference circuits. |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - exceeds level 4 immunity; eliminates need for secondary ESD protection in front-end interfaces. |
Pinout & Package
SMC30J36CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package: 7.75–8.15 mm length × 5.55–6.25 mm width × 2.45 mm height, matte tin-plated leads, MSL Level 1, compatible with standard reflow profiles per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Reference terminal for unidirectional devices; symmetrical node in bidirectional configuration | In SMC30J36CA (bidirectional), both terminals are functionally identical - no polarity sensitivity; connects across differential or AC lines without orientation concern. |
| Anode | Reference terminal for unidirectional devices; symmetrical node in bidirectional configuration | Electrically interchangeable with cathode; forms a center-tapped, symmetric avalanche structure enabling equal clamping in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| High surge robustness | 3000 W (10/1000 μs) rating enables single-device protection against IEC 61000-4-4 level 4 surges in DC power rails and data lines. |
| Bidirectional symmetry | Identical clamping behavior (±58.1 V @ 48.4 A) in both polarities eliminates need for polarity-aware layout or dual-diode solutions. |
| Low leakage & high Tj | 0.2 µA IR at 25 °C and operation up to 175 °C junction temperature support long-term reliability in thermally stressed industrial environments. |
| Standardized footprint | JEDEC SMC outline and IPC7531-compliant land pattern ensure drop-in compatibility with existing PCB designs and automated assembly processes. |
| ESD immunity beyond spec | ±30 kV contact/air discharge exceeds IEC 61000-4-2 level 4 - reduces risk of field failures in handheld, medical, and test equipment interfaces. |
Applications
| Industrial Power Supply Inputs | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against load dump, jump-start transients, and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge clamp placed directly at connector entry point, shunting >95% of transient energy to ground before reaching DC-DC controllers or microcontrollers. Use Value: Prevents latch-up or permanent damage to upstream PMICs and MCU power domains during vehicle battery system faults. |
Use Scenario: ESD protection on LIN bus lines and sensor inputs (e.g., ambient temperature, door position) exposed to human touch. IC Role / Device Role / Timing Role: Bidirectional TVS placed across LIN differential pair or between signal line and chassis ground, absorbing ±30 kV discharges without polarity reversal. Use Value: Maintains bus communication integrity after repeated ESD events - validated per ISO 10605 and AEC-Q101 requirements. |
| Telecom Ethernet PHY Interfaces | Renewable Energy Inverter DC Link Monitoring |
|
Use Scenario: Surge suppression on 10/100BASE-TX transformer-coupled pairs subjected to induced lightning surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level protection placed after common-mode chokes, clamping differential-mode surges below PHY IC absolute maximum ratings. Use Value: Limits VCL to 58.1 V while sustaining 48.4 A peak current - avoids PHY reset or PHY port disable during transient events. |
Use Scenario: Overvoltage protection on isolated voltage sense inputs monitoring 400–800 V DC link in solar inverters. IC Role / Device Role / Timing Role: High-standoff TVS placed across precision resistive divider inputs, preventing damage from switching transients or isolation barrier failure. Use Value: Withstands 36 V standoff and clamps at 58.1 V - protects 16-bit ADCs and isolated amplifiers rated for ≤60 V input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA (STMicroelectronics) | Same 36 V VRM and bidirectional topology, but lower 600 W PPP rating (10/1000 μs); SMC package replaced by smaller SMB (DO-214AA). | Insufficient for 3000 W surge events; suitable only for low-energy ESD or secondary protection where space is constrained. | Select when board area is limited and surge threat level is ≤600 W - not a functional replacement for primary surge suppression. |
| SAC30J36CA (Littelfuse) | Identical 36 V VRM, 3000 W PPP, and SMC package; clamping voltage 59.0 V @ 48 A (vs. 58.1 V @ 48.4 A); slightly higher dynamic resistance (65 mΩ). | Functionally interchangeable in most layouts; minor VCL difference has negligible impact on protected IC stress margins. | Valid drop-in alternative if sourcing flexibility or dual-sourcing strategy is required; verify layout clearance for marking variation. |
Compared with SMBJ36CA, SMC30J36CA provides five times higher surge energy handling in the same footprint family; versus SAC30J36CA, it offers marginally tighter clamping and lower dynamic resistance - advantageous in high-precision analog sensing or fast-switching power stages.
Availability
SMC30J36CA is available at Aetrix Electronics and suitable for industrial power supply inputs, automotive body control modules, telecom Ethernet PHY interfaces, and renewable energy inverter DC link monitoring requiring stable component supply across multi-year production cycles.
Supply support for SMC30J36CA 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
SMC30JxxCA belongs to ST's high-power TVS diode product line, engineered specifically for robust, single-component protection against IEC 61000-4-2 ESD, IEC 61000-4-4 EFT, and ISO 7637-2 automotive transients in space-constrained, high-reliability applications.
FAQ
What is the maximum clamping voltage of SMC30J36CA under a 10/1000 μs surge?
The maximum clamping voltage (VCL) is 58.1 V at 48.4 A peak pulse current for a 10/1000 μs waveform, measured at 25 °C ambient. This value increases linearly with junction temperature due to the αT coefficient of 10⁻⁴/°C, reaching ~61.2 V at 125 °C junction temperature.
Is SMC30J36CA suitable for protecting RS-485 communication lines?
Yes - its bidirectional operation, 36 V standoff, and 58.1 V clamping align with RS-485 common-mode voltage limits (±7 V to ±12 V) when used with appropriate series current-limiting resistors. It suppresses ESD and fast transients without distorting differential signaling, provided layout minimizes parasitic inductance.
Does SMC30J36CA require derating at elevated ambient temperatures?
Yes - peak pulse power must be derated above 25 °C ambient, per Figure 3 in DS8598. At 85 °C ambient, PPP drops to ~2100 W for VBR ≥ 36 V devices. Derating is governed by junction temperature; thermal design must maintain Tj ≤ 175 °C using recommended copper area (≥3 cm² per lead) and FR4 PCB construction.
How does the dynamic resistance (RD) of 63.2 mΩ affect circuit protection performance?
A dynamic resistance of 63.2 mΩ determines the voltage rise above VBR during surge conduction: ΔV = RD × IPP. For a 48.4 A surge, this contributes ~3.07 V to clamping - meaning VCL ≈ VBR(min) + 3.07 V. Lower RD improves clamping precision and reduces stress on downstream components during high-current events.
SMC30J36CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC30J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 48.41A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SMC30J36CA FAQ
1.How can I place an order for SMC30J36CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J36CA 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 SMC30J36CA reliable?
The price and inventory of SMC30J36CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J36CA is usually 5 days.
3.What payment methods are accepted for SMC30J36CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J36CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J36CA?
SMC30J36CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J36CA 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 SMC30J36CA?
For technical support, including SMC30J36CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J36CA requirements.
6.How does Aetrix verify that SMC30J36CA is sourced from the original manufacturer or authorized distributors?
All SMC30J36CA 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 SMC30J36CA meets industry standards.
7.What is the process for return or replacement of SMC30J36CA?
All SMC30J36CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J36CA, 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 SMC30J36CA part is unused and in its original packaging.
Return procedure for SMC30J36CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J36CA Tags
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