My Inquiry
My Account
STMicroelectronics SMC50J64CA
- Part No.:
- SMC50J64CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J64CA.pdf
- Description:
- 5000 W, 64 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC50J64CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power rails and signal lines. It features a 64 V standoff voltage (VRM), 103 V clamping voltage at 47 A (8/20 µs), 5000 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature - deployed in industrial power supplies, telecom interfaces, and automotive body control modules.
For engineers reviewing the SMC50J64CA datasheet, SMC50J64CA pinout, SMC50J64CA application, or SMC50J64CA equivalent, key selection criteria include bidirectional ESD robustness (±30 kV contact/air per IEC 61000-4-2), low leakage (0.2 µA at 25 °C), JEDEC-standard SMC package compatibility, and dynamic resistance of 154 mΩ - critical for fast-rising transients in 24–48 V DC systems.
Technical Context
This device uses planar silicon avalanche technology to achieve precise breakdown symmetry for bidirectional clamping, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its thermal design supports sustained operation at Tj = 175 °C, validated by JEDEC JESD22-A103 reliability testing and MSL Level 1 moisture sensitivity rating.
The SMC50J64CA exhibits voltage-dependent dynamic resistance (RD = 154 mΩ at 8/20 µs), enabling predictable clamping behavior under multi-kA surges. Its junction capacitance remains below 32 pF at 0 V (f = 1 MHz), making it suitable for data lines up to 100 Mbps where signal integrity must be preserved during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 64 V - maximum continuous reverse operating voltage before significant leakage; defines minimum system rail margin for reliable clamping activation. |
| Clamping Voltage (VCL) | 103 V at 47 A (8/20 µs) - peak voltage seen by protected circuit during worst-case surge; ensures downstream ICs rated ≤100 V remain within safe operating area. |
| Peak Pulse Power | 5000 W (10/1000 µs) - energy-handling capability for lightning-induced surges in industrial 24/48 V DC systems per IEC 61000-4-5. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby power loss and minimal impact on high-impedance sensor or reference circuits. |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in under-hood automotive, outdoor telecom, and high-temperature industrial enclosures without derating. |
| ESD Robustness | ±30 kV contact & air discharge (IEC 61000-4-2 Level 4) - exceeds standard requirements for human-body-model ESD immunity in user-accessible ports. |
| Dynamic Resistance (RD) | 154 mΩ - low impedance path during surge conduction, minimizing voltage overshoot and ensuring consistent clamping across temperature and current. |
Pinout & Package
SMC50J64CA is housed in a JEDEC-standard SMC (DO-214AB) surface-mount package with matte tin-plated leads, optimized for automated assembly and high thermal dissipation on FR4 PCBs. The package measures 7.75–8.15 mm × 5.55–6.25 mm × 2.45 mm max height and supports IPC7531-compliant footprint layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked End) | Common terminal for bidirectional clamping | Identified by cathode bar marking; serves as symmetric conduction node for both polarities - no anode/cathode distinction in bidirectional operation. |
| Anode (Unmarked End) | Common terminal for bidirectional clamping | Electrically identical to cathode terminal; forms symmetrical PN junction pair enabling equal clamping in positive and negative directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Matched VBR(min)/VBR(max) = 71.1 V / 78.6 V ensures ≤10% voltage mismatch between polarities - critical for balanced protection of differential or AC-coupled lines. |
| High-temperature reliability | Rated for continuous operation at Tj = 175 °C with no degradation in clamping performance - validated per JESD22-A103 and MIL-STD-750 Method 2026. |
| Low dynamic resistance | RD = 154 mΩ minimizes voltage overshoot during fast 8/20 µs transients - reduces risk of latch-up or gate oxide damage in downstream MOSFETs or controllers. |
| UL94 V0 flammability rating | Self-extinguishing epoxy molding compound prevents fire propagation in safety-critical power distribution systems per UL and IEC standards. |
| JEDEC MSL Level 1 | Zero floor life limitation - can be stored indefinitely at ≤30 °C/60% RH without baking prior to reflow, simplifying inventory management and production planning. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge shunt device placed upstream of DC-DC converter input filter to clamp transients before they reach sensitive switching regulators. Use Value: Withstands 5000 W (10/1000 µs) surges while limiting voltage to ≤103 V - protects 65 V-rated input capacitors and MOSFETs without requiring oversized snubbers. |
Use Scenario: Bidirectional protection of CAN_H/CAN_L differential pair in vehicle BCM against ESD and battery transients. IC Role / Device Role / Timing Role: Low-capacitance (≤32 pF) TVS pair placed across CAN bus lines to suppress ±30 kV ESD without distorting 1 Mbps CAN FD signaling. Use Value: Symmetric clamping ensures equal rise/fall time preservation; 154 mΩ RD maintains common-mode rejection ratio (CMRR) during surge events. |
| Telecom Ethernet PHY Interface | Renewable Energy Inverter DC Link Monitoring |
|
Use Scenario: Protection of 10/100BASE-TX Ethernet PHY's MDI pins against induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional TVS array (dual SMC50J64CA) placed on each twisted pair to clamp common-mode transients while preserving signal integrity. Use Value: Sub-32 pF capacitance avoids signal attenuation above 31.25 MHz; ±30 kV ESD rating meets EN 61000-4-2 compliance for Class A equipment. |
Use Scenario: Overvoltage protection of isolated voltage sense circuitry monitoring 600 V DC link in solar string inverters. IC Role / Device Role / Timing Role: High-VRMS TVS placed across optocoupler input resistor divider to prevent false triggering during grid-switching transients. Use Value: 64 V VRM provides 10× margin over 6 V sense rail; 175 °C Tj rating ensures stable operation near heat-generating IGBT modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA (STMicroelectronics) | Lower peak power: 600 W (10/1000 µs); same VRM/VCL but higher RD (≈220 mΩ); SMB package (smaller footprint, lower thermal mass). | Targeted at space-constrained consumer electronics with lower surge exposure (e.g., USB-C PD ports), not industrial 5 kV-level threats. | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 only - avoid for IEC 61000-4-4/5 or load-dump scenarios. |
| SAC50-64CA (Littelfuse) | Same 5000 W rating and 64 V VRM; slightly higher VCL (105 V @ 47 A); JEDEC SMC package; tested to AEC-Q200 Grade 1. | Qualified for automotive under-hood use per AEC-Q200; includes extended temperature cycling and humidity testing beyond JEDEC standards. | Prefer for automotive OEM designs requiring AEC-Q200 qualification; otherwise identical functional performance to SMC50J64CA in industrial settings. |
Compared with SMBJ64CA, SMC50J64CA delivers 8.3× higher surge energy handling and superior thermal stability for harsh environments; versus SAC50-64CA, it offers identical protection specs but lacks AEC-Q200 certification - making it ideal for cost-sensitive industrial applications where automotive qualification is unnecessary.
Availability
SMC50J64CA is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom Ethernet interfaces, and renewable energy inverter monitoring systems requiring stable component supply and long-term obsolescence management.
Supply support for SMC50J64CA 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 SMC50J TVS series was developed to address high-energy transient protection needs in next-generation 24–48 V DC systems, emphasizing thermal resilience, ESD immunity, and JEDEC-compliant manufacturability for high-volume industrial and automotive applications.
FAQ
What is the difference between SMC50J64A and SMC50J64CA?
The "A" suffix denotes unidirectional TVS configuration (anode-cathode polarity), while "CA" indicates bidirectional operation (symmetrical clamping for AC or floating signals). SMC50J64CA has matched breakdown voltages in both directions (71.1 V min / 78.6 V max), whereas SMC50J64A conducts only in reverse bias and requires correct orientation in-circuit.
Can SMC50J64CA replace SMCJ64CA in existing designs?
Yes - both share identical SMC package, 64 V VRM, and bidirectional functionality. However, SMC50J64CA offers 5000 W peak power (vs. 1500 W for SMCJ64CA), lower dynamic resistance (154 mΩ vs. ~300 mΩ), and higher junction temperature rating (175 °C vs. 150 °C), enabling enhanced surge margin without layout changes.
Is SMC50J64CA compliant with AEC-Q200 for automotive use?
No - SMC50J64CA is not AEC-Q200 qualified. While it operates reliably from −55 °C to +175 °C and meets IEC 61000-4-2/4-4/4-5, it lacks the extended temperature cycling, vibration, and humidity testing required for automotive qualification. For AEC-Q200 applications, consider SAC50-64CA or SMAJ64CA-AE.
What PCB layout practices maximize thermal performance of SMC50J64CA?
Use ≥3 cm² copper area under each lead (per Figure 12), connect both terminals to internal ground/power planes via multiple thermal vias, and maintain ≥1.5 mm clearance from adjacent components. The recommended footprint (Figure 14) specifies 5.11 mm pad length and 3.14 mm pad width to ensure solder joint reliability during JEDEC J-STD-020 reflow profiles.
SMC50J64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V (Max)
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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
SMC50J64CA FAQ
1.How can I place an order for SMC50J64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J64CA 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 SMC50J64CA reliable?
The price and inventory of SMC50J64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J64CA is usually 5 days.
3.What payment methods are accepted for SMC50J64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J64CA?
SMC50J64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J64CA 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 SMC50J64CA?
For technical support, including SMC50J64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J64CA requirements.
6.How does Aetrix verify that SMC50J64CA is sourced from the original manufacturer or authorized distributors?
All SMC50J64CA 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 SMC50J64CA meets industry standards.
7.What is the process for return or replacement of SMC50J64CA?
All SMC50J64CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J64CA, 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 SMC50J64CA part is unused and in its original packaging.
Return procedure for SMC50J64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J64CA 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…
