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Vishay General Semiconductor - Diodes Division SMBJ12C-E3/52
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- Part No.:
- SMBJ12C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12C-E3/52.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
SMBJ12C-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V maximum clamping voltage (VC) at 30.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ12C-E3/52 datasheet, SMBJ12C-E3/52 pinout, SMBJ12C-E3/52 application, or SMBJ12C-E3/52 equivalent, key selection criteria include unidirectional polarity, 19.9 V clamping performance under 30.2 A surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced transients.
The SMBJ12C-E3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C - confirming suitability for high-reliability commercial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 13.3 V / 14.7 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 19.9 V at 30.2 A - Clamping voltage under 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 surge waveforms. |
| IPPM | 30.2 A - Peak pulse current supported at VC; directly correlates with surge energy absorption (E ≈ VC × IPPM × tp). |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs derating requirements above 25 °C ambient. |
| Junction Temp Range | –55 °C to +150 °C - Specifies full operational envelope for automotive-adjacent and industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; enables conduction only when cathode is > anode by ≥VBR. |
| Cathode | Reverse voltage reference terminal | Marked end; connected to higher-potential side (e.g., VCC rail or signal line); defines clamping path to ground or return. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated energy absorption capacity for IEC 61000-4-5 Level 4 surges without degradation. |
| 19.9 V clamping voltage at 30.2 A | Ensures protected ICs experience ≤20 V transient stress, preserving 3.3 V/5 V logic integrity. |
| Glass passivated junction | Delivers stable VBR tolerance and long-term reliability under repeated surge cycling. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture-related popcorning or delamination. |
| RoHS-compliant, matte tin terminals | Guarantees solderability and intermetallic formation control across JEDEC-standard assembly processes. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between VDD rail and ground, shunting transients before they reach sensitive logic. Use Value: Limits voltage excursion to 19.9 V during 30.2 A surges, preventing latch-up or oxide breakdown in 5 V MCU peripherals. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point, conducting only during overvoltage events >12 V. Use Value: Withstands 100 A 8.3 ms half-sine surge (IFSM) while maintaining <1 µA leakage at 12 V, ensuring low-power sleep mode integrity. |
| Telecom Power Supplies | Consumer IoT Sensor Nodes |
|
Use Scenario: Input-stage protection for 12 V DC-DC converters subjected to lightning-induced surges on PoE or AC/DC adapter inputs. IC Role / Device Role / Timing Role: Primary transient clamp on primary-side DC rail, coordinated with upstream fusing and downstream LC filtering. Use Value: 600 W pulse rating absorbs 10/1000 µs surges up to 30.2 A without thermal runaway, validated per UL 497B. |
Use Scenario: ESD hardening of analog sensor outputs (e.g., temperature, humidity) connected to ADC inputs in battery-powered wearables. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical at 0 V) unidirectional TVS placed adjacent to connector or IC pin. Use Value: Sub-1 ns response time and <1 µA leakage at 12 V preserve signal fidelity and battery life in always-on sensing applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Same VWM (12 V), identical VBR and VC specs; differs only in marking code (A vs C suffix denotes same unidirectional variant). | No functional difference; "A" and "C" suffixes both indicate unidirectional SMBJ12 devices per Vishay's ordering convention. | Select SMBJ12C-E3/52 when matching documented BOMs specifying "C" suffix; otherwise interchangeable with SMBJ12A-E3/52. |
| SMCJ12A-E3/52 | Same electrical specs but larger SMC (DO-214AB) package; 1500 W PPPM, RθJA = 40 °C/W, higher IPPM (69.4 A). | Used where higher surge margin or improved thermal dissipation is required; occupies more board area. | Choose SMBJ12C-E3/52 for space-constrained designs needing 600 W rating; select SMCJ12A-E3/52 only if 1500 W headroom or lower thermal resistance is mandatory. |
Compared with SMBJ12A-E3/52, SMBJ12C-E3/52 offers identical protection performance in the same SMB footprint; versus SMCJ12A-E3/52, it trades 2.5× lower surge rating and higher thermal resistance for 30% smaller PCB area and compatibility with fine-pitch SMT lines.
Availability
SMBJ12C-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for SMBJ12C-E3/52 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 and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in space-constrained commercial and industrial systems, balancing clamping precision, surge robustness, and manufacturability in standard SMT packages.
FAQ
What is the clamping voltage of SMBJ12C-E3/52 at its rated peak pulse current?
The SMBJ12C-E3/52 has a maximum clamping voltage (VC) of 19.9 V at its specified peak pulse current (IPPM) of 30.2 A under a 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024), and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is SMBJ12C-E3/52 unidirectional or bidirectional, and how is polarity identified?
SMBJ12C-E3/52 is a unidirectional TVS diode. Polarity is identified by a cathode band marked on the device body - the banded end is the cathode and must be connected toward the higher-potential side of the protected line (e.g., VCC or signal line), while the anode connects toward ground or return. Bidirectional variants use a "CA" suffix (e.g., SMBJ12CA); the "C" in SMBJ12C-E3/52 does not indicate bidirectionality but aligns with Vishay's unidirectional marking convention.
What is the maximum operating junction temperature for SMBJ12C-E3/52?
The SMBJ12C-E3/52 has a maximum operating junction temperature (TJ) of +150 °C and a minimum of –55 °C, as specified in the Vishay datasheet. This wide range supports deployment in under-hood automotive, industrial controls, and outdoor telecom equipment. Derating of peak pulse power begins above 25 °C ambient per Figure 2 in the datasheet, with RθJA = 100 °C/W defining the thermal path to ambient air on standard 0.2" × 0.2" copper pads.
Does SMBJ12C-E3/52 meet AEC-Q101 qualification?
No - SMBJ12C-E3/52 is RoHS-compliant commercial-grade (E3 suffix), not AEC-Q101 qualified. Vishay designates AEC-Q101 versions with "HE3" or "HM3" suffixes (e.g., SMBJ12AHE3_B). The "E3" in SMBJ12C-E3/52 indicates lead-free, RoHS-compliant termination and commercial temperature grading only. For automotive applications requiring AEC-Q101 validation, engineers must specify the HE3/HM3 variant explicitly.
What is the standoff voltage (VWM) and why is it critical for SMBJ12C-E3/52 selection?
The standoff voltage (VWM) of SMBJ12C-E3/52 is 12 V - the maximum DC or RMS voltage the device can withstand continuously without entering avalanche conduction. It must exceed the normal operating voltage of the protected line (e.g., 12 V rail) with margin to avoid leakage or premature clamping. Selecting a VWM too close to operating voltage risks false triggering; 12 V VWM provides appropriate margin for nominal 12 V systems while enabling tight clamping at 19.9 V.
SMBJ12C-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 27.3A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ12C-E3/52 FAQ
1.How can I place an order for SMBJ12C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12C-E3/52 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 SMBJ12C-E3/52 reliable?
The price and inventory of SMBJ12C-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ12C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ12C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12C-E3/52?
SMBJ12C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12C-E3/52 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 SMBJ12C-E3/52?
For technical support, including SMBJ12C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12C-E3/52 requirements.
6.How does Aetrix verify that SMBJ12C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ12C-E3/52 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 SMBJ12C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ12C-E3/52?
All SMBJ12C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12C-E3/52, 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 SMBJ12C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ12C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12C-E3/52 Tags
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