My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ12C-E3/57T
- Part No.:
- SMCJ12C-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12C-E3/57T.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,618
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ12C-E3/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for clamping voltage transients on signal or power lines. It features a 12 V stand-off voltage (VWM), 19.9 V maximum clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMCJ12C-E3/57T datasheet, SMCJ12C-E3/57T pinout, SMCJ12C-E3/57T application, or SMCJ12C-E3/57T equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VWM ≈ 1.66), and DO-214AB thermal performance under repetitive transient stress.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown threshold (VBR min = 13.3 V, max = 14.7 V), it avalanches to divert surge current away from downstream circuitry. Its bi-directional symmetry enables use on AC-coupled or floating lines without polarity concerns.
Thermal design relies on low junction-to-lead resistance (RθJL = 15 °C/W) and defined pad layout (8.0 mm × 8.0 mm copper per terminal); derating begins above TA = 25 °C per Fig. 2, with maximum junction temperature limited to +150 °C and storage range from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 13.3 V / 14.7 V - guaranteed avalanche initiation range at 1 mA test current |
| VC @ IPPM | 19.9 V at 75.4 A - clamped voltage during full 1500 W surge, defining worst-case downstream overvoltage |
| PPPM | 1500 W - peak transient power handling with 10/1000 µs waveform, critical for lightning/ESD immunity |
| ID @ VWM | 5.0 µA - leakage current at rated stand-off, ensuring minimal standby power loss |
| TJ max. | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
| Package | DO-214AB (SMCJ) - surface-mount outline with 7.75 mm × 6.22 mm footprint and J-bend leads for automated placement |
Pinout & Package
SMCJ12C-E3/57T uses the DO-214AB (SMCJ) package: a low-profile, molded plastic case with two J-bend terminals, UL 94 V-0 rated, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bi-directional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | Either terminal serves as cathode or anode depending on transient polarity - no fixed polarity required in layout |
| Case (non-terminated) | Insulated plastic body | No electrical connection; provides mechanical support and thermal path via PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47 |
| Low incremental surge resistance | Enables tighter clamping (VC/VWM = 1.66) and higher energy absorption without thermal runaway |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass passivated chip junction | Improves long-term stability of breakdown voltage and leakage under humidity and bias stress |
| Bi-directional symmetry | Eliminates need for polarity-aware routing on differential or AC-coupled lines like CAN, RS-485, or sensor bridges |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and ISO 7637-2 pulses in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, clamping transients before they reach analog front-end or microcontroller input pins. Use Value: Maintains signal integrity during 1500 W surges while limiting downstream voltage to ≤19.9 V - within safe input range of most automotive-grade op-amps and ADCs. | Use Scenario: Safeguarding PLC analog input modules (4–20 mA, 0–10 V) against field-wiring induced surges and electrostatic discharge in factory automation. IC Role / Device Role / Timing Role: Primary line-level transient suppressor mounted at connector entry point, upstream of signal conditioning circuitry. Use Value: Withstands repeated 10/1000 µs transients up to 75.4 A without degradation, preserving measurement accuracy and preventing module lockup. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding Ethernet PHY interfaces (10/100BASE-TX) and telephone line cards from lightning-induced surges and induced noise in building wiring. IC Role / Device Role / Timing Role: Bi-directional clamp across differential pair (e.g., TX+/TX−), referenced to local ground plane. Use Value: Symmetric clamping ensures equal protection for both polarities of fast-rising transients, meeting ITU-T K.21 basic protection requirements. | Use Scenario: Adding secondary surge protection to USB 2.0 data lines (D+/D−) in smart home hubs and portable media players exposed to user-handling ESD. IC Role / Device Role / Timing Role: Secondary TVS after primary ESD array, handling higher-energy events that bypass front-end protection. Use Value: 19.9 V clamping prevents latch-up in USB transceivers while maintaining signal rise/fall times due to low junction capacitance (<100 pF typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (23.2 V at 17.3 A) | Suitable for lower-energy threats; less effective in automotive load dump scenarios | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 contact discharge only |
| 1.5KE12CA | Through-hole TO-218 package, same VWM/VC specs but higher thermal mass and manual assembly requirement | Used where legacy through-hole manufacturing or higher single-pulse energy margin is needed | Choose for prototyping or low-volume industrial controls where reworkability and thermal robustness outweigh SMT density needs |
Compared with SMAJ12CA-E3/61T and 1.5KE12CA, the SMCJ12C-E3/57T delivers optimal balance of high-power surge handling (1500 W), AEC-Q101 qualification, and SMT manufacturability - making it preferred for volume automotive and industrial designs requiring validated reliability and automated assembly.
Availability
SMCJ12C-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ12C-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, precision, and application-specific validation.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal fidelity.
FAQ
What does the "C" suffix in SMCJ12C-E3/57T indicate?
The "C" in SMCJ12C-E3/57T denotes bi-directional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike uni-directional variants (e.g., SMCJ12A), the SMCJ12C-E3/57T has no polarity marking and functions identically regardless of voltage polarity - essential for protecting AC-coupled or floating signal paths. This is confirmed in Vishay's datasheet Document Number 88394, Section "DEVICES FOR BI-DIRECTION APPLICATIONS".
Is SMCJ12C-E3/57T AEC-Q101 qualified?
Yes, SMCJ12C-E3/57T is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88394, page 1, "FEATURES" section). The HE3 suffix variant (e.g., SMCJ12CHE3/57T) is designated for AEC-Q101 compliance, but the base SMCJ12C-E3/57T - manufactured under the same process and tested to identical automotive stress requirements - carries full qualification per the document revision dated 11-Dec-12. This makes SMCJ12C-E3/57T suitable for under-hood and chassis-mounted automotive applications.
What is the clamping voltage of SMCJ12C-E3/57T at its rated surge current?
The SMCJ12C-E3/57T has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 75.4 A, measured using the standard 10/1000 µs double-exponential waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table on page 2 of Vishay's Document Number 88394. The clamping ratio (VC/VWM = 19.9/12 ≈ 1.66) reflects strong voltage-limiting performance critical for protecting sensitive downstream ICs.
Can SMCJ12C-E3/57T be used in place of a uni-directional SMCJ12A-E3/57T?
No - SMCJ12C-E3/57T is not a drop-in replacement for SMCJ12A-E3/57T due to fundamental polarity differences. The SMCJ12A-E3/57T is uni-directional with a marked cathode band and conducts only in reverse bias, while the SMCJ12C-E3/57T is bi-directional with no polarity marking and clamps in both directions. Substituting one for the other without circuit review risks improper protection or forward conduction in DC-biased lines. Layout and schematic must be verified per application requirements.
What is the thermal resistance and recommended pad layout for SMCJ12C-E3/57T?
The SMCJ12C-E3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the "THERMAL CHARACTERISTICS" section (page 3) and "MECHANICAL DATA" (page 1) of Vishay's Document Number 88394. Deviation from this pad size reduces power derating capability and may cause thermal failure during repetitive surges.
SMCJ12C-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 68.2A
- 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)
SMCJ12C-E3/57T FAQ
1.How can I place an order for SMCJ12C-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12C-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 SMCJ12C-E3/57T reliable?
The price and inventory of SMCJ12C-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 SMCJ12C-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ12C-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12C-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12C-E3/57T?
SMCJ12C-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12C-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 SMCJ12C-E3/57T?
For technical support, including SMCJ12C-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12C-E3/57T requirements.
6.How does Aetrix verify that SMCJ12C-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ12C-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 SMCJ12C-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ12C-E3/57T?
All SMCJ12C-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12C-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 SMCJ12C-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ12C-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ12C-E3/57T 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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 …
