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Vishay General Semiconductor - Diodes Division SMCJ30C-E3/57T
- Part No.:
- SMCJ30C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30C-E3/57T.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,867
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Product details
Overview
SMCJ30C-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 on signal and power lines. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ30C-E3/57T datasheet, SMCJ30C-E3/57T pinout, SMCJ30C-E3/57T application, or SMCJ30C-E3/57T equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low incremental surge resistance, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ30C-E3/57T operates as a silicon avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) support reliable operation up to 150 °C junction temperature under defined PCB layout conditions.
It complies with ANSI/IEEE C62.35 for surge suppression and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak. The device is rated for non-repetitive 10/1000 µs surges up to 1500 W and exhibits ≤1.0 µA reverse leakage at 30 V (VWM), making it suitable for high-impedance signal line protection where minimal loading is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 33.3 V / 36.8 V - breakdown occurs within this range at 1.0 mA test current, defining turn-on threshold |
| VC @ IPPM | 48.4 V - clamped voltage across terminals during 31.0 A 10/1000 µs surge, limiting stress on downstream circuitry |
| PPPM | 1500 W - peak transient power the device can absorb without failure under standardized waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage ensures minimal DC loading on protected signal or bias lines |
| TJ max. | +150 °C - maximum allowable junction temperature supports under-hood automotive and industrial environments |
| Package | DO-214AB (SMCJ) - surface-mount outline with J-bend leads, optimized for automated placement and thermal relief |
Pinout & Package
SMCJ30C-E3/57T uses the DO-214AB (SMCJ) package: a surface-mount, bi-directional TVS diode with two terminals and no polarity marking - consistent with all CA-suffix bi-directional variants. The case is molded compound rated UL 94 V-0, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity above VBR - no cathode band marking required |
| Case (exposed metal) | Thermal path only | No electrical connection; serves as heatsink interface when mounted on copper pads per recommended 8.0 mm × 8.0 mm layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature, critical for long-life industrial deployments |
| MSL Level 1 rating | Enables standard SMT reflow without dry-pack or baking requirements - simplifies manufacturing logistics |
| Low incremental surge resistance | Minimizes VC rise under high-current transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces |
| RoHS-compliant & whisker-tested | E3 suffix confirms compliance with JESD 201 Class 1A tin whisker mitigation, supporting high-reliability aerospace and medical-adjacent systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Clamps transients to ≤48.4 V, preventing latch-up or damage to 36 V-rated input stages while maintaining <1 µA leakage at nominal 12 V operation. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) in PLC I/O modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bi-directional shunt protector on signal lines between field devices and isolation barriers. Use Value: Symmetrical clamping enables protection of bidirectional buses without polarity concerns; low capacitance preserves signal integrity up to 1 MHz. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier outputs and secondary-side 5 V/12 V rails against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output bus feeding SMPS controllers and communication ICs. Use Value: 1500 W PPPM rating handles 2 kV/1 kA combination wave surges; DO-214AB footprint allows compact placement near connectors. | Use Scenario: Suppressing flyback spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-motor terminals or across H-bridge freewheeling paths to clamp inductive kickback. Use Value: Withstands repetitive 31 A surges and maintains stable VBR over 10⁵ cycles - validated for motor drive duty cycles per AEC-Q101 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC30C-E3/57T | Same VWM (30 V) and PPPM (1500 W), but lower clamping voltage (VC = 45.7 V at IPPM) and higher IPPM (32.5 A); SAC series has tighter VBR tolerance (±5%) vs. SMCJ's ±10% | Better suited for designs requiring tighter clamping margin below 46 V, especially with 3.3 V rail protection | Select SAC30C-E3/57T when lower VC and tighter VBR are prioritized over cost and legacy design continuity |
| 1.5KE30CA | Through-hole DO-201 package, same VWM (30 V), slightly higher VC (49.9 V), identical PPPM (1500 W); not AEC-Q101 qualified | Limited to non-automotive industrial or prototyping use due to lack of automotive qualification and larger footprint | Choose 1.5KE30CA only for manual assembly or legacy through-hole designs where AEC-Q101 is not required |
Compared with SAC30C-E3/57T and 1.5KE30CA, the SMCJ30C-E3/57T offers optimal balance of AEC-Q101 compliance, SMT manufacturability, and proven field reliability in automotive power domains - while its DO-214AB footprint enables higher board density than DO-201 alternatives.
Availability
SMCJ30C-E3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and RoHS-compliant SMT TVS protection.
Supply support for SMCJ30C-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and robust surge handling are mandatory.
FAQ
What is the clamping voltage of the SMCJ30C-E3/57T under a 10/1000 µs surge?
The SMCJ30C-E3/57T has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 31.0 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within safe operating limits.
Is the SMCJ30C-E3/57T suitable for automotive applications?
Yes, the SMCJ30C-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validation across temperature cycling, HTRB, and ESD tests per JEDEC standards - making it appropriate for engine control units, body electronics, and ADAS power domains where reliability under thermal and electrical stress is essential.
Does the SMCJ30C-E3/57T have polarity markings?
No, the SMCJ30C-E3/57T does not feature a cathode band or polarity marking because it is a bi-directional TVS diode. As confirmed in the Vishay datasheet, "no marking on bi-directional types" - meaning both terminals are functionally identical and conduct symmetrically above the breakdown voltage in either direction, eliminating orientation concerns during placement.
What is the maximum reverse leakage current for the SMCJ30C-E3/57T at its stand-off voltage?
The SMCJ30C-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its rated stand-off voltage (VWM) of 30 V, measured at TA = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance signal paths such as sensor outputs or reference voltage nodes, preserving accuracy and reducing standby power loss in battery-operated systems.
What package type does the SMCJ30C-E3/57T use, and what are its mounting requirements?
The SMCJ30C-E3/57T uses the DO-214AB (SMCJ) surface-mount package with J-bend leads. Per Vishay specifications, it must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated thermal and surge performance - including the 1500 W PPPM and 75 °C/W junction-to-ambient thermal resistance.
SMCJ30C-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SMCJ30C-E3/57T FAQ
1.How can I place an order for SMCJ30C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30C-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 SMCJ30C-E3/57T reliable?
The price and inventory of SMCJ30C-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 SMCJ30C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ30C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30C-E3/57T?
SMCJ30C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30C-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 SMCJ30C-E3/57T?
For technical support, including SMCJ30C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30C-E3/57T requirements.
6.How does Aetrix verify that SMCJ30C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ30C-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 SMCJ30C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ30C-E3/57T?
All SMCJ30C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30C-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 SMCJ30C-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ30C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30C-E3/57T Tags
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