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STMicroelectronics SMC50J16CA
- Part No.:
- SMC50J16CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J16CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:7,748
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Product details
Overview
SMC50J16CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in DC power lines and signal interfaces. It features a 16 V standoff voltage (VRM), 26 V clamping voltage at 192 A (10/1000 µs), 5000 W peak pulse power, 0.2 µA max leakage at 25 °C, and operates up to 175 °C junction temperature - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMC50J16CA datasheet, SMC50J16CA pinout, SMC50J16CA application, or SMC50J16CA equivalent, key selection criteria include bidirectional clamping behavior, low-leakage performance at elevated temperatures, IEC 61000-4-2 ±30 kV ESD robustness, and compatibility with SMC package reflow profiles per J-STD-020 MSL Level 1.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its dynamic resistance of 13.8 mΩ (at 25 °C, 10/1000 µs) ensures minimal voltage overshoot during fast transients.
The device meets IEC 61000-4-4 Level 4 (4 kV) surge immunity and exceeds IEC 61000-4-2 Level 4 for both air and contact discharge (±30 kV), with thermal stability maintained across –55 °C to +175 °C operating junction range and JEDEC-registered SMC package outline compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 16 V - Maximum continuous reverse working voltage before clamping initiates. |
| Clamping Voltage (VCL) | 26 V at 192 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge. |
| Peak Pulse Power (PPP) | 5000 W (10/1000 µs) - Sustained energy-handling capability for standard lightning/surge waveforms. |
| Leakage Current (IRM) | 0.2 µA at VRM and 25 °C - Ensures negligible standby power loss in battery-backed or low-power systems. |
| Junction Temperature Range | –55 °C to +175 °C - Supports operation in under-hood automotive, industrial motor drives, and high-ambient SMPS designs. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact & air discharge - Exceeds Level 4, eliminating need for external ESD staging in many interface ports. |
| Package | SMC (DO-214AB) - Standardized surface-mount footprint with 7.75–8.15 mm body width and JEDEC-compliant thermal pad layout. |
Pinout & Package
SMC50J16CA is housed in a 2-terminal SMC (DO-214AB) package with cathode-bar marking indicating polarity orientation. The device has no internal circuitry beyond the symmetrical avalanche junction; terminals are non-polarized for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Surge current path terminal | Both terminals function identically - current flows symmetrically during positive or negative transients; cathode bar denotes marking convention only, not functional polarity. |
| Cathode Bar Marking | Visual orientation indicator | Used during placement verification; does not imply unidirectional behavior - device is fully bidirectional per datasheet Type "CA" designation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating DC rails without polarity concerns. |
| Low dynamic resistance (13.8 mΩ) | Minimizes clamping voltage rise under high-current surges, preserving margin for downstream IC absolute maximum ratings. |
| High-temperature leakage stability | 0.2 µA at 25 °C rising to <1000 nA at 150 °C - maintains signal integrity in thermally stressed environments like engine control units. |
| JEDEC-registered SMC outline | Ensures mechanical compatibility with automated pick-and-place, reflow soldering (MSL Level 1), and IPC-7351B footprint adherence. |
| UL94 V0 flammability rating | Validates polymer encapsulation safety in enclosed industrial enclosures where flame propagation must be prevented. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Protection |
|---|---|
|
Use Scenario: 24 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 clamp on main DC rail, placed upstream of DC-DC converter input filter. Use Value: Clamps 5000 W transients to ≤26 V, preventing overvoltage damage to buck controller ICs and electrolytic capacitors rated at 35 V. |
Use Scenario: Bidirectional protection of CAN_H/CAN_L differential pair in vehicle BCM against ESD and coupled transients. IC Role / Device Role / Timing Role: Common-mode TVS pair (one SMC50J16CA across each line-to-ground) maintaining signal integrity during ±30 kV ESD events. Use Value: Low capacitance (<100 pF typical at 0 V) avoids CAN bit-rate degradation; symmetrical clamping preserves differential voltage swing during fast transients. |
| RS-485 Transceiver Interface Protection | Smart Meter AC/DC Auxiliary Power Rail |
|
Use Scenario: Protection of half-duplex RS-485 transceiver (e.g., SN65HVD72) in utility meter communication port subjected to field ESD and induced surges. IC Role / Device Role / Timing Role: Line-to-ground TVS on A/B bus lines, placed immediately after connector to shunt energy before transceiver ESD structures. Use Value: 26 V clamping ensures transceiver I/O pins (typically rated ±15 V) remain within safe operating area during 4 kV IEC 61000-4-4 surges. |
Use Scenario: Secondary-side 16 V auxiliary rail in smart electricity meter's isolated AC/DC converter powering real-time clock and metrology ASIC. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing coupling from primary-side transients or relay switching noise into low-noise analog domain. Use Value: 0.2 µA leakage prevents measurable error in µA-level RTC backup current; 175 °C rating supports sealed meter enclosure operation at 85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA (Bourns) | Same VRM (16 V), lower PPP (600 W), higher VCL (28.8 V @ 21.5 A), SMB package (smaller thermal mass). | Limited to lower-energy surges; unsuitable for 5000 W IEC 61000-4-4 Level 4 compliance. | Select when space-constrained layouts prioritize footprint size over surge rating. |
| 1.5KE16CA (ON Semiconductor) | Same VRM (16 V), higher VCL (28.8 V @ 172 A), axial DO-201 package, 1500 W PPP rating. | Requires through-hole assembly; lacks SMC's reflow compatibility and MSL Level 1 rating. | Choose only for legacy through-hole designs where automated SMT is unavailable. |
Compared with SMBJ16CA and 1.5KE16CA, SMC50J16CA uniquely delivers 5000 W surge handling in an SMT JEDEC-compliant package with industry-leading 26 V clamping and 175 °C operation - making it the only option meeting full IEC 61000-4-4 Level 4 and automotive under-hood thermal requirements in a single device.
Availability
SMC50J16CA is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, RS-485 communication interfaces, and smart meter auxiliary power rails requiring stable component supply and long-term obsolescence management.
Supply support for SMC50J16CA 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 microcontrollers, power devices, sensors, and protection components for industrial, automotive, and consumer markets.
The SMC50J TVS series targets high-reliability DC power and data-line protection, emphasizing low-leakage planar junctions, extended temperature operation, and compliance with IEC/ISO automotive and industrial immunity standards.
FAQ
What is the difference between SMC50J16A and SMC50J16CA?
SMC50J16A is unidirectional (anode-cathode asymmetry), clamping only in reverse bias, while SMC50J16CA is bidirectional - identical clamping behavior for both polarities due to symmetrical junction design. The 'CA' suffix explicitly denotes bidirectional functionality per ST's ordering code convention and datasheet Table 6 marking differentiation.
Can SMC50J16CA be used in place of a unidirectional TVS in DC power rail protection?
Yes - SMC50J16CA provides equal clamping performance in both directions, making it suitable for DC rails where reverse polarity connection risk exists or where simplified BOM management is prioritized. However, its bidirectional leakage is slightly higher than unidirectional variants below 10 V VRM; at 16 V, leakage remains identical (0.2 µA max) per Table 2.
Does SMC50J16CA meet AEC-Q200 stress testing requirements?
No - SMC50J16CA is not AEC-Q200 qualified. While it operates up to 175 °C junction temperature and passes IEC 61000-4-2/4-4, ST does not list it in AEC-Q200 stress-tested categories. For automotive-grade qualification, consider ST's Automotive Qualified TVS portfolio (e.g., SMAJ series with AEC-Q200 certification noted in respective datasheets).
What is the recommended PCB footprint for SMC50J16CA?
The manufacturer recommends the IPC-7351B compliant SMC footprint with 5.11 mm pad length, 3.14 mm pad width, 8.19 mm center-to-center spacing, and 1.54 mm solder mask opening per pad - matching Figure 14 in DS13845 Rev 1. Copper area under each lead should exceed 2 cm² to achieve specified Rth(j-a) of ~100 °C/W per Figure 12.
SMC50J16CA 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):
- 16V (Max)
- Voltage - Breakdown (Min):
- 17.9V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 192A
- 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
SMC50J16CA FAQ
1.How can I place an order for SMC50J16CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J16CA 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 SMC50J16CA reliable?
The price and inventory of SMC50J16CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J16CA is usually 5 days.
3.What payment methods are accepted for SMC50J16CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J16CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J16CA?
SMC50J16CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J16CA 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 SMC50J16CA?
For technical support, including SMC50J16CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J16CA requirements.
6.How does Aetrix verify that SMC50J16CA is sourced from the original manufacturer or authorized distributors?
All SMC50J16CA 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 SMC50J16CA meets industry standards.
7.What is the process for return or replacement of SMC50J16CA?
All SMC50J16CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J16CA, 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 SMC50J16CA part is unused and in its original packaging.
Return procedure for SMC50J16CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J16CA Tags
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