My Inquiry
My Account
STMicroelectronics SMC50J6.5CA
- Part No.:
- SMC50J6.5CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J6.5CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:9,157
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC50J6.5CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It delivers 5000 W peak pulse power (10/1000 µs), clamps at 11.2 V (max) under 447 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in automotive infotainment power supplies and industrial I/O interfaces.
For engineers reviewing the SMC50J6.5CA datasheet, SMC50J6.5CA pinout, SMC50J6.5CA application, or SMC50J6.5CA equivalent, key selection criteria include bidirectional clamping behavior, low leakage (≤0.2 µA at 25 °C), JEDEC-registered SMC package compatibility, and compliance with IEC 61000-4-2 level 4 (±30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV).
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to electrostatic discharge and electrical overstress events. Its bidirectional configuration enables symmetric clamping across both polarities without external polarity management, making it suitable for AC-coupled or floating signal paths.
The device features a dynamic resistance of 6.1 mΩ (typical at 8/20 µs), enabling low clamping voltage rise under high-current transients, and exhibits stable VBR drift coefficient (αT = 3.63 × 10−4/°C) for predictable performance across −55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 5000 W - sustains high-energy surges common in automotive load-dump and industrial switching noise environments |
| Clamping Voltage VCL (10/1000 µs) | 11.2 V max at 447 A - limits downstream voltage stress to safe levels for 12 V rail ICs |
| Standoff Voltage VRM | 6.5 V - matches nominal 5 V logic or USB interface rails while allowing margin for ripple and tolerance |
| Leakage Current IR | ≤0.2 µA at 25 °C - minimizes standby power loss in battery-backed or low-power sensor nodes |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood automotive and high-temperature industrial deployments |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air discharge - exceeds level 4 immunity for human-body-model ESD events |
| Surge Rating (IEC 61000-4-4) | 4 kV - protects against fast transient bursts on power and communication lines |
Pinout & Package
SMC50J6.5CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, compatible with IPC-7531 footprint and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode-bar side) | Transient current sink (negative polarity) | Provides low-impedance path to ground during negative transients; cathode bar marking identifies polarity orientation |
| Cathode (non-bar side) | Transient current sink (positive polarity) | Provides low-impedance path to ground during positive transients; bidirectional symmetry ensures equal clamping in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or ungrounded buses without polarity constraints |
| Low dynamic resistance (6.1 mΩ) | Reduces clamping voltage overshoot during high di/dt surges, improving protection margin for sensitive ICs |
| High junction temperature rating (175 °C) | Supports placement near heat-generating components (e.g., power MOSFETs, DC-DC converters) without derating |
| JEDEC-registered SMC outline | Ensures mechanical compatibility with standard pick-and-place equipment and automated optical inspection (AOI) |
| UL94 V0 flammability rating | Meets safety requirements for enclosed industrial and automotive enclosures subject to flame propagation tests |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting 12 V supply inputs to head unit MCUs and audio amplifiers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of DC-DC converter input to limit voltage excursions below 15 V. Use Value: Prevents latch-up or permanent damage to 12 V-rated regulators and microcontrollers during ISO 7637-2 pulse 5a events. |
Use Scenario: Safeguarding RS-485 transceiver data lines against ESD and lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS connected between A/B differential pairs and ground to suppress ±30 kV HBM events. Use Value: Maintains signal integrity by limiting clamping voltage to ≤12 V while adding <0.5 pF parasitic capacitance at 1 MHz. |
| Smart Meter Power Input | Medical Sensor Signal Conditioning |
Use Scenario: Shielding AC/DC adapter output stages in utility smart meters from conducted surges per IEC 61000-4-4 level 4. IC Role / Device Role / Timing Role: Primary surge suppression device on 5 V or 3.3 V DC bus feeding metrology SoCs and RTC circuits. Use Value: Guarantees uninterrupted operation during 4 kV burst testing by clamping transients within 1 ns and dissipating 5000 W peak energy. |
Use Scenario: Protecting analog front-end inputs of patient-monitoring ECG/EEG modules from operator ESD during clinical use. IC Role / Device Role / Timing Role: Low-leakage (0.2 µA) bidirectional TVS placed directly at connector pins to avoid signal distortion. Use Value: Preserves DC accuracy and noise floor in sub-µV biomedical measurements while passing IEC 61000-4-2 level 4 certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5CA (Bourns) | Lower peak power (600 W vs. 5000 W); SMB package (smaller footprint, higher thermal resistance) | Suitable only for low-energy ESD-only scenarios; not rated for IEC 61000-4-4 level 4 surges | Select when space-constrained PCB layout prioritizes size over surge robustness |
| 1.5KE6.8CA (Littelfuse) | Higher clamping voltage (14.5 V vs. 11.2 V); DO-204AC (Axial lead) package; 1500 W rating | Requires through-hole mounting; less suitable for automated SMT assembly and high-density layouts | Select when legacy axial design or cost-sensitive non-automated production is required |
Compared with SMBJ6.5CA and 1.5KE6.8CA, SMC50J6.5CA provides 8.3× higher surge power handling and lower clamping voltage in an SMT-optimized JEDEC package - delivering superior protection margin for modern automotive and industrial systems where space, reliability, and high-energy immunity are jointly critical.
Availability
SMC50J6.5CA is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial RS-485 interfaces, and smart meter power inputs requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMC50J6.5CA 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 specializing in power management, analog, MEMS, and microcontroller technologies for automotive, industrial, and consumer markets.
The SMC50J series belongs to ST's high-power TVS portfolio, engineered specifically for demanding surge immunity in harsh-environment applications where reliability under repeated high-energy transients is mandatory.
FAQ
What is the maximum clamping voltage for SMC50J6.5CA under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 11.2 V at 447 A peak pulse current for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases predictably with junction temperature using the αT coefficient (3.63 × 10−4/°C), reaching ~12.1 V at 125 °C.
Is SMC50J6.5CA suitable for protecting USB 2.0 data lines?
No - its junction capacitance is not specified for this part, and typical SMC-packaged 6.5 V TVS diodes exceed 100 pF, which would distort USB 2.0 high-speed signaling. For USB data lines, ST recommends dedicated low-capacitance ESD arrays like ESDALC6V1-1U2.
How does the bidirectional configuration affect PCB layout versus unidirectional variants?
SMC50J6.5CA has no polarity marking requirement beyond the cathode bar; it can be mounted in either orientation without functional impact. Unlike unidirectional types (e.g., SMC50J6.5A), no ground-referenced anode/cathode routing is needed - simplifying layout for differential or floating nodes.
Does SMC50J6.5CA meet AEC-Q200 stress test requirements?
No - while rated for 175 °C operation and compliant with IEC/UL safety standards, SMC50J6.5CA is not qualified to AEC-Q200. For automotive-grade TVS diodes, ST offers the SMAJ6.5CA-Q variant, which undergoes full AEC-Q200 temperature cycling, humidity bias, and mechanical shock testing.
SMC50J6.5CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V (Max)
- Voltage - Breakdown (Min):
- 7.2V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 447A
- Power - Peak Pulse:
- 5000W (5kW)
- 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
SMC50J6.5CA FAQ
1.How can I place an order for SMC50J6.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J6.5CA 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 SMC50J6.5CA reliable?
The price and inventory of SMC50J6.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J6.5CA is usually 5 days.
3.What payment methods are accepted for SMC50J6.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J6.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J6.5CA?
SMC50J6.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J6.5CA 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 SMC50J6.5CA?
For technical support, including SMC50J6.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J6.5CA requirements.
6.How does Aetrix verify that SMC50J6.5CA is sourced from the original manufacturer or authorized distributors?
All SMC50J6.5CA 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 SMC50J6.5CA meets industry standards.
7.What is the process for return or replacement of SMC50J6.5CA?
All SMC50J6.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J6.5CA, 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 SMC50J6.5CA part is unused and in its original packaging.
Return procedure for SMC50J6.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J6.5CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
