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Vishay General Semiconductor - Diodes Division SMBJ14CA-E3/52
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- Part No.:
- SMBJ14CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CA-E3/52.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
SMBJ14CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ14CA-E3/52 datasheet, SMBJ14CA-E3/52 pinout, SMBJ14CA-E3/52 application, or SMBJ14CA-E3/52 equivalent, key selection considerations include bidirectional surge suppression capability, low clamping ratio (VC/VWM = 1.66), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification availability in HE3 variants - critical for automotive-grade transient protection design.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 15.6–17.2 V (min/max) under 1 mA test current, and reverse leakage current ≤1.0 µA at 14 V stand-off. Its fast response time (<1 ps) and low incremental surge resistance enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device uses a glass-passivated silicon junction and is rated for operating junction temperature from –55 °C to +150 °C. Thermal resistance from junction-to-ambient is 100 °C/W (typical), and it meets UL 94 V-0 flammability requirements with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 15.6–17.2 V @ 1 mA - Voltage at which device enters avalanche breakdown; ensures reliable triggering during overvoltage events. |
| VC (Clamping Voltage) | 23.2 V @ 25.9 A - Maximum voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability under standardized 10/1000 µs waveform; enables robust surge handling. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient environments like motor drives or base stations. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with 5.59 mm × 4.06 mm footprint; optimized for automated placement and thermal pad layout. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration with no polarity marking; symmetrical terminal structure for AC-coupled or floating-line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically in bidirectional mode; current flows from either terminal to the other during overvoltage, enabling line-to-line or line-to-ground clamping without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients such as IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V DC rails. |
| Bidirectional symmetry (no polarity marking) | Eliminates orientation errors during assembly and supports AC signal line or differential bus protection (e.g., RS-485, CAN). |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes voltage overshoot during clamping, reducing stress on 16 V-rated ICs or MOSFETs downstream. |
| MSL Level 1 (JEDEC J-STD-020) | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying manufacturing flow for high-volume PCB assembly. |
| Glass-passivated junction | Improves long-term reliability and stability of breakdown characteristics under thermal cycling and humidity exposure. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver inputs and feedback sensing lines against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal traces between microcontroller GPIOs and external switches. Use Value: Limits transient excursions to ≤23.2 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces while surviving repetitive 100 A surge events per JEDEC standards. |
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-clamp TVS connected between LIN signal and ground, operating in bidirectional mode to handle ±30 V transients. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 1 (–150 V) and Pulse 2a (+100 V) tests due to sub-1 ns response and stable VBR tolerance (±8.7%). |
| Telecom Power Feeds | Consumer IoT Sensor Hubs |
|
Use Scenario: Input-stage protection on 48 V PoE-powered Ethernet switch ports subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with upstream GDT and downstream π-filter. Use Value: Absorbs up to 600 W of surge energy without thermal runaway, verified per IEC 61000-4-5 Ed. 3 with 2 Ω source impedance. |
Use Scenario: ESD hardening of I²C and analog sensor inputs (e.g., temperature, humidity) in battery-powered smart home devices. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional clamp placed directly at connector interface. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV contact) without signal distortion or baseline shift, thanks to matched VBR symmetry and <100 ps response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same thermal resistance and clamping performance. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy (e.g., EU automotive Tier 1). | Choose SMBJ14CA-M3/52 if halogen-free material content is required; otherwise, SMBJ14CA-E3/52 offers standard RoHS compliance at broader distributor availability. |
| SAC14-01A | Lower 600 W rating but tighter VBR tolerance (±5% vs. ±8.7%), higher IPPM (27.5 A), and slightly lower VC (22.5 V); same SMB package and bidirectional function. | Better suited for precision clamping where minimal voltage overshoot is critical, e.g., protecting 12 V ADC reference inputs. | Select SAC14-01A when tighter VBR distribution and lower clamping voltage are prioritized over legacy footprint compatibility verification. |
Compared with SMBJ14CA-E3/52, SMBJ14CA-M3/52 provides identical protection performance with halogen-free construction, while SAC14-01A delivers improved clamping precision at the cost of reduced industry-wide design reuse confidence due to different manufacturer qualification history.
Availability
SMBJ14CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SMBJ14CA-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, rectifiers, MOSFETs, and passive components with emphasis on reliability, power efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial automation, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ14CA-E3/52 at its rated peak pulse current?
The SMBJ14CA-E3/52 has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 25.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during surge events, ensuring downstream 16 V-rated components remain within safe operating limits. The SMBJ14CA-E3/52 achieves this with a clamping ratio of 1.66 relative to its 14 V stand-off voltage.
Is SMBJ14CA-E3/52 suitable for automotive applications?
The SMBJ14CA-E3/52 itself is commercial-grade (RoHS-compliant, not AEC-Q101 qualified), but Vishay offers the functionally identical SMBJ14CAHE3_B variant with full AEC-Q101 qualification for automotive use. For non-automotive industrial or telecom designs, the SMBJ14CA-E3/52 meets all electrical and mechanical specifications required for under-hood or chassis-mounted transient protection, provided thermal derating and layout guidelines are followed. Always verify qualification status via the full ordering code before automotive deployment.
How does the bidirectional nature of SMBJ14CA-E3/52 affect PCB layout?
The SMBJ14CA-E3/52 has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This allows direct integration into AC-coupled signal paths (e.g., RS-485, CAN, audio lines) or floating power rails without concern for anode/cathode alignment. PCB layout requires symmetric 5.0 mm × 5.0 mm copper pads per terminal to maintain specified thermal resistance (RθJA = 100 °C/W) and peak pulse current rating. No silkscreen polarity indicator is needed.
What is the maximum operating temperature for SMBJ14CA-E3/52?
The SMBJ14CA-E3/52 is rated for a maximum junction temperature (TJ) of +150 °C and a storage temperature range of –55 °C to +150 °C. Its thermal resistance from junction-to-ambient is 100 °C/W (typical) when mounted on 0.2" × 0.2" copper pads, meaning power dissipation must be limited to avoid exceeding TJ max. Under continuous 5.0 W power dissipation (PD), ambient temperature must stay below +100 °C to maintain safe operation. Derating curves in Figure 2 of the datasheet guide thermal design.
Does SMBJ14CA-E3/52 meet any safety certifications?
Yes, the SMBJ14CA-E3/52 carries Underwriters Laboratories (UL) recognition under file number E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for primary protector classification. Its molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin plated per J-STD-002 and JESD 22-B102. These certifications validate its suitability for safety-critical surge protection in end-equipment requiring regulatory approval, including industrial controls and telecom infrastructure.
SMBJ14CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- 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)
SMBJ14CA-E3/52 FAQ
1.How can I place an order for SMBJ14CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CA-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 SMBJ14CA-E3/52 reliable?
The price and inventory of SMBJ14CA-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 SMBJ14CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CA-E3/52?
SMBJ14CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CA-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 SMBJ14CA-E3/52?
For technical support, including SMBJ14CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ14CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14CA-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 SMBJ14CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14CA-E3/52?
All SMBJ14CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CA-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 SMBJ14CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ14CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CA-E3/52 Tags
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