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Vishay General Semiconductor - Diodes Division SMCJ51C-E3/57T
- Part No.:
- SMCJ51C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ51C-E3/57T.pdf
- Description:
- TVS DIODE 51VWM 91.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,341
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Product details
Overview
SMCJ51C-E3/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 51 V stand-off voltage (VWM), 82.4 V maximum clamping voltage (VC) at 18.2 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ51C-E3/57T datasheet, SMCJ51C-E3/57T pinout, SMCJ51C-E3/57T application, or SMCJ51C-E3/57T equivalent, key selection criteria include verified bi-directional clamping performance, AEC-Q101 qualification, UL 497B recognition, low incremental surge resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ51C-E3/57T operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR (56.7–62.7 V) and low leakage (<1.0 µA at VWM), while thermal resistance RθJA = 75 °C/W supports operation up to TJ = 150 °C.
It complies with ANSI/IEEE C62.35 for surge suppression and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The device is rated for non-repetitive 10/1000 µs surges up to 1500 W and withstands 8.3 ms half-sine forward surge currents up to 200 A in uni-directional configurations - though SMCJ51C-E3/57T itself is bi-directional and thus excludes IFSM rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 56.7 V / 62.7 V - breakdown voltage range at 1 mA test current; ensures reliable turn-on across process variation and temperature. |
| VC @ IPPM | 82.4 V at 18.2 A - clamping voltage under 10/1000 µs surge; limits protected circuit stress during worst-case transients. |
| PPPM | 1500 W - peak pulse power handling capability; enables survival of high-energy lightning-induced or inductive-switching surges. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at stand-off voltage; prevents unnecessary power loss or false triggering in low-power circuits. |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive and high-ambient industrial environments. |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bi-directional construction means no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR - no cathode band or polarity identification required. |
| Case (cathode tie for uni-directional variants) | Thermal and mechanical interface | DO-214AB body serves as thermal mass; mounting on 8.0 mm × 8.0 mm copper pads required to achieve rated PPPM and thermal derating. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control, ADAS sensors, and infotainment power supplies. |
| UL 497B recognition (QVGQ2) | Confirms compliance with telecom and industrial surge protection safety standards for both uni- and bi-directional variants. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving protection margin for downstream ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-throughput SMT assembly lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed microcontrollers and gate drivers in vehicle body control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at power entry point, shunting surge energy to ground before it reaches downstream regulators and logic. Use Value: Withstands 1500 W surges and clamps to ≤82.4 V, ensuring input voltage stays below 100 V absolute maximum ratings of typical 48 V DC-DC controllers. |
Use Scenario: Safeguarding analog outputs and digital communication lines (e.g., 4–20 mA loops, IO-Link) in factory automation sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: Bi-directional TVS placed differential across signal pair or common-mode to chassis ground, suppressing both positive and negative EFT bursts. Use Value: Sub-1 µA leakage at 51 V VWM avoids loading precision current loops; 82.4 V VC limits fault voltage seen by ADC inputs and isolators. |
| Telecom Interface Surge Protection | Consumer Device USB/Type-C Port Protection |
|
Use Scenario: Hardening Ethernet PHY interfaces and PoE injectors against lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV line-earth). IC Role / Device Role / Timing Role: First-stage protector on RJ45 magnetics secondary side, absorbing bulk surge energy before secondary TVS or integrated protection ICs. Use Value: 1500 W PPPM and 82.4 V VC meet IEC 61000-4-5 requirements for 10/1000 µs waveforms; UL 497B listing confirms system-level certification readiness. |
Use Scenario: Protecting USB 2.0 data lines and VBUS pins in portable audio devices and smart home hubs from ESD and hot-plug transients. IC Role / Device Role / Timing Role: Bi-directional clamp on D+/D− lines and unidirectional variant on VBUS; SMCJ51C-E3/57T used for higher-voltage auxiliary rails or legacy 5 V tolerant interfaces. Use Value: 51 V VWM allows use on 3.3 V or 5 V lines with sufficient margin; 82.4 V VC prevents latch-up in USB transceivers rated to 100 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC51C-TB | Same VWM (51 V) and bi-directional configuration, but lower PPPM (600 W) and higher VC (93.6 V); TO-220AC package with through-hole mounting. | Limited to lower-energy surges and manual assembly; unsuitable for high-density SMT layouts or automotive under-hood vibration environments. | Select SAC51C-TB only if board space permits through-hole footprint and surge energy is ≤600 W. |
| SMCJ51CAHE3/57T | Identical electrical specs and DO-214AB package, but HE3 suffix denotes AEC-Q101 qualification - same as SMCJ51C-E3/57T per Vishay documentation (both carry AEC-Q101). | No functional difference; HE3 and E3 share identical qualification status and performance - HE3 is simply alternate ordering code for same AEC-Q101-compliant device. | SMCJ51CAHE3/57T is not a true alternative but a duplicate part number; SMCJ51C-E3/57T remains preferred for clarity and traceability. |
Compared with SAC51C-TB and SMCJ51CAHE3/57T, the SMCJ51C-E3/57T delivers full 1500 W surge capability in a compact SMT package with verified AEC-Q101 reliability - making it optimal for space-constrained, high-energy automotive and industrial protection where TO-220 alternatives fall short and duplicate part numbers add no design benefit.
Availability
SMCJ51C-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom surge suppression, and consumer USB port safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ51C-E3/57T 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the SMCJ51C-E3/57T under a 10/1000 µs surge?
The SMCJ51C-E3/57T has a maximum clamping voltage (VC) of 82.4 V at 18.2 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 11-Dec-12, Document Number 88394. The SMCJ51C-E3/57T maintains this clamping performance across its specified operating temperature range and is validated for bi-directional conduction.
Is the SMCJ51C-E3/57T qualified for automotive applications?
Yes, the SMCJ51C-E3/57T is AEC-Q101 qualified per Vishay's official documentation, confirming its suitability for automotive electronic systems including engine control units, ADAS sensors, and infotainment power supplies. The SMCJ51C-E3/57T undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD immunity - all required for automotive-grade reliability.
Does the SMCJ51C-E3/57T have polarity markings on the package?
No, the SMCJ51C-E3/57T does not feature polarity markings because it is a bi-directional TVS diode. Unlike uni-directional variants (e.g., SMCJ51A), the SMCJ51C-E3/57T has symmetrical terminal behavior and no cathode band. Its DO-214AB package is physically identical at both ends, allowing either terminal to serve as anode or cathode depending on transient polarity.
What is the maximum junction temperature rating for the SMCJ51C-E3/57T?
The SMCJ51C-E3/57T has a maximum junction temperature (TJ) rating of +150 °C, as specified in Vishay's datasheet. This rating enables reliable operation in high-ambient environments such as under-hood automotive locations or enclosed industrial enclosures. Derating curves in Figure 2 of the datasheet define allowable power dissipation above 25 °C ambient.
How does the SMCJ51C-E3/57T differ from the SMCJ51A-E3/57T?
The SMCJ51C-E3/57T is bi-directional with symmetrical breakdown in both polarities, while the SMCJ51A-E3/57T is uni-directional and features a cathode band. Electrically, SMCJ51C-E3/57T has identical VWM (51 V) and PPPM (1500 W) but excludes IFSM rating (200 A) since it lacks forward conduction directionality. The SMCJ51C-E3/57T is used where AC or floating signals require dual-polarity protection - e.g., CAN bus, RS-485, or transformer-coupled interfaces.
SMCJ51C-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 91.1V
- Current - Peak Pulse (10/1000µs):
- 16.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- DO-214AB (SMCJ)
SMCJ51C-E3/57T FAQ
1.How can I place an order for SMCJ51C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ51C-E3/57T 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 SMCJ51C-E3/57T reliable?
The price and inventory of SMCJ51C-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ51C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ51C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ51C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ51C-E3/57T?
SMCJ51C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ51C-E3/57T 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 SMCJ51C-E3/57T?
For technical support, including SMCJ51C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ51C-E3/57T requirements.
6.How does Aetrix verify that SMCJ51C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ51C-E3/57T 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 SMCJ51C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ51C-E3/57T?
All SMCJ51C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ51C-E3/57T, 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 SMCJ51C-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ51C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ51C-E3/57T Tags
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