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Vishay General Semiconductor - Diodes Division SMCJ30CA-E3/57T
- Part No.:
- SMCJ30CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30CA-E3/57T.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
SMCJ30CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage at 31.0 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating. Used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ30CA-E3/57T datasheet, SMCJ30CA-E3/57T pinout, SMCJ30CA-E3/57T application, or SMCJ30CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge handling, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ30CA-E3/57T operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown voltage range of 33.3 V to 36.8 V at 1.0 mA test current. Its low incremental surge resistance ensures stable clamping under fast-rising 10/1000 µs surges up to 31.0 A.
Thermally, it supports junction temperatures from –55 °C to +150 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W. It meets J-STD-020 MSL Level 1 and is rated for 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 33.3 V / 36.8 V at IT = 1.0 mA - Confirmed bidirectional breakdown window; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 48.4 V at 31.0 A (10/1000 µs) - Clamped voltage seen by protected circuit; limits stress on downstream 3.3 V/5 V logic or gate drivers. |
| PPPM | 1500 W - Peak transient power absorption capacity; sustains single high-energy surges per IEC 61000-4-5 Level 4. |
| IPPM | 31.0 A - Maximum non-repetitive surge current; derived from 10/1000 µs waveform; requires proper PCB copper thermal relief. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline; 7.75 mm × 6.22 mm footprint; compatible with JEDEC MS-013AC. |
Pinout & Package
SMCJ30CA-E3/57T uses the SMC (DO-214AB) package: a symmetrical, unmarked, bidirectional device with no polarity marking. Both terminals are electrically identical; no anode/cathode distinction applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connects to line under protection (e.g., CAN_H, RS-485 A, DC bus); carries full surge current during clamping. |
| Terminal 2 | Transient input/output node | Second connection point to same protected line; completes bidirectional conduction path; no ground reference required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns. |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications up to Level 4 (4 kV/2 Ω). |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage overshoot during transients-critical for safeguarding 3.3 V microcontrollers and analog front-ends. |
| MSL Level 1, 260 °C reflow | Supports standard lead-free SMT assembly without moisture sensitivity precautions or baking. |
| RoHS-compliant, matte tin plating | Ensures solderability per J-STD-002/JESD22-B102 and eliminates whisker risk per JESD201 Class 2. |
Applications
| Automotive Power Line Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power rails in body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤48.4 V during 31 A surges, preventing damage to PMICs and CAN transceivers. |
Use Scenario: Safeguarding RS-485 transceiver data lines (A/B) in factory automation PLCs exposed to EFT and surge noise. IC Role / Device Role / Timing Role: Differential-line TVS connected across A–B pins to suppress common-mode and differential transients. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <1 pF capacitance at 0 V bias. |
| Consumer Sensor Hub Protection | Telecom DC Power Input |
|
Use Scenario: Shielding I²C/SPI lines of MEMS sensor arrays in smart home hubs from ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized bidirectional TVS placed adjacent to sensor connector to minimize loop inductance. Use Value: Absorbs 15 kV HBM ESD strikes without degradation, preserving low-noise analog performance of ADC inputs. |
Use Scenario: Guarding 48 V DC input of PoE-powered telecom equipment against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC/DC converter, coordinated with upstream GDT. Use Value: Handles 1500 W surges with 48.4 V clamping, reducing stress on downstream TVS arrays and enabling smaller secondary protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52T | Lower PPPM (600 W), smaller SMB package (DO-214AA), same VWM/VC specs. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for 24 V automotive load dump. | Select when board space is constrained and surge energy does not exceed 600 W. |
| SMCJ33CA-E3/57T | Higher VWM (33 V), VBR 36.7–40.6 V, same package and PPPM. | Better margin for 28 V aerospace or 32 V industrial systems; slightly higher clamping (53.3 V). | Choose for 28–32 V nominal rails where tighter VWM tolerance is needed. |
Compared with SMCJ30CA-E3/57T, SMBJ30CA-E3/52T trades surge robustness for compactness, while SMCJ33CA-E3/57T offers higher standoff for elevated supply rails-neither is pin-compatible due to differing package footprints or voltage thresholds, requiring layout review.
Availability
SMCJ30CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial RS-485 nodes, and telecom power supplies requiring stable component supply, AEC-Q101-aligned sourcing, and full traceability.
Supply support for SMCJ30CA-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, and protection devices with emphasis on reliability, automotive qualification, and high-power handling.
The SMCJ series was engineered for high-energy transient suppression in harsh environments-targeting automotive power distribution, industrial communications, and infrastructure power systems where 1500 W surge immunity is mandatory.
FAQ
What is the clamping voltage of SMCJ30CA-E3/57T at its rated peak pulse current?
The SMCJ30CA-E3/57T has a maximum clamping voltage (VC) of 48.4 V at 31.0 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The SMCJ30CA-E3/57T maintains this clamping performance across its specified operating temperature range.
Is SMCJ30CA-E3/57T suitable for automotive applications?
Yes, SMCJ30CA-E3/57T is qualified to AEC-Q101 when ordered with HE3 suffix (e.g., SMCJ30CAHE3_A), but the -E3/57T variant is commercial-grade RoHS-compliant. For automotive use, confirm ordering code SMCJ30CAHE3_A/H or SMCJ30CAHM3_A/H to ensure AEC-Q101 qualification, high-temperature reliability, and enhanced process controls. The SMCJ30CA-E3/57T itself meets all electrical and thermal specs required for under-hood environments up to +150 °C junction temperature.
How does the bidirectional design of SMCJ30CA-E3/57T affect its PCB layout?
The SMCJ30CA-E3/57T has no polarity marking and identical terminals, simplifying layout for AC or differential lines-no orientation check is needed during placement. However, effective transient suppression requires low-inductance routing: short traces to protected node and ground plane, symmetric pad geometry, and adherence to the recommended 8.0 mm × 8.0 mm copper pad per terminal per Vishay's thermal guidelines. The SMCJ30CA-E3/57T must not be placed near heat sources that exceed its 150 °C TJ limit.
What is the maximum reverse leakage current of SMCJ30CA-E3/57T at its standoff voltage?
At its 30 V standoff voltage (VWM), the SMCJ30CA-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity on high-impedance sensor or communication lines and minimizes standby power loss in battery-operated systems. Leakage remains below 5.0 µA up to +85 °C, as confirmed in Vishay's electrical characteristics table.
Can SMCJ30CA-E3/57T be used in place of a unidirectional TVS like SMCJ30A-E3/57T?
No-SMCJ30CA-E3/57T is strictly bidirectional and cannot replace unidirectional types such as SMCJ30A-E3/57T in DC-only applications requiring cathode-to-ground configuration. Unidirectional devices conduct forward current during positive surges only; substituting the CA version introduces unintended conduction paths. The SMCJ30CA-E3/57T is intended for AC, differential, or floating-line protection where symmetry matters-not for single-rail clamping to ground.
SMCJ30CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMCJ30CA-E3/57T FAQ
1.How can I place an order for SMCJ30CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30CA-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 SMCJ30CA-E3/57T reliable?
The price and inventory of SMCJ30CA-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 SMCJ30CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ30CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30CA-E3/57T?
SMCJ30CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30CA-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 SMCJ30CA-E3/57T?
For technical support, including SMCJ30CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ30CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ30CA-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 SMCJ30CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ30CA-E3/57T?
All SMCJ30CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30CA-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 SMCJ30CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ30CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30CA-E3/57T Tags
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