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Vishay General Semiconductor - Diodes Division SMBJ14CA-E3/5B
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- Part No.:
- SMBJ14CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CA-E3/5B.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:259
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Product details
Overview
SMBJ14CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (VBR at 1 mA), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces and telecom line cards.
For engineers reviewing the SMBJ14CA-E3/5B datasheet, SMBJ14CA-E3/5B pinout, SMBJ14CA-E3/5B application, or SMBJ14CA-E3/5B equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant SMB package dimensions, and AEC-Q101-qualified alternatives - all critical for ESD/surge co-design in automotive body control modules and 24 V DC industrial I/O protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity - essential for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling precise voltage limiting during fast transients.
The device sustains repetitive 600 W surges at 0.01% duty cycle and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature. Its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design (0.2" × 0.2") to maintain operation within -55 °C to +150 °C junction temperature limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit under rated surge; determines downstream IC survivability. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability; validated per Fig. 1 derating curve up to TJ = 125 °C. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current supported; directly tied to VC and PCB trace routing requirements. |
| TJmax | +150 °C - Absolute maximum junction temperature; constrains thermal design and long-term reliability in sealed enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; compatible with automated placement. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as anode and cathode depending on applied voltage polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminal 1) | Bidirectional surge path input | Connects to line under protection; conducts equally in either direction once VBR exceeded. |
| Anode/Cathode (Terminal 2) | Bidirectional surge path return | Connects to reference plane (GND or return rail); completes low-impedance shunt path for transient energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without cascading failure in 24 V systems. |
| 23.2 V clamping at 25.9 A | Keeps protected 16 V-rated microcontrollers and CAN transceivers within safe operating voltage during 1 A–30 A transients. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-induced popcorn cracking or bond wire damage. |
| Low leakage: ≤1.0 µA at 14 V | Prevents measurable standby current drain in battery-powered sensor nodes and maintains signal integrity on high-impedance analog inputs. |
| AEC-Q101 qualified option available | Validated for automotive under-hood applications including engine control units and ADAS camera power supplies. |
Applications
| Industrial Sensor Interface | Telecom Line Card Protection |
|---|---|
|
Use Scenario: Protecting 4–20 mA current loop receivers and RS-485 transceivers from induced lightning surges and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and ground, absorbing >95% of transient energy before it reaches the PHY layer. Use Value: Maintains <1 µA leakage at 24 V supply while clamping 1 kV/0.5 µs transients to <25 V - preserving data integrity and preventing transceiver latch-up. |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against ESD (IEC 61000-4-2 ±8 kV contact) and surge (IEC 61000-4-5 2 kV line-earth). IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF) bidirectional TVS placed differential-mode across MDI pairs and common-mode to chassis ground. Use Value: Clamps 10/1000 µs surges to 23.2 V without distorting 100BASE-TX eye diagrams - meeting IEEE 802.3af timing jitter limits. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Shielding LIN bus transceivers and window lift motor drivers from load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Primary front-end clamp on 12 V supply rail, coordinated with upstream fuse and downstream LC filter. Use Value: Withstands 600 W pulses at -40 °C to +125 °C ambient and clamps 100 V/10 ms load dump to <30 V - preventing MCU brownout and gate driver damage. |
Use Scenario: Suppressing commutation spikes from universal motor brushes and BLDC inverter shoot-through in washing machines and HVAC fans. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals and across DC link capacitors to limit dv/dt and prevent IGBT avalanche failure. Use Value: Responds in <1 ps to sub-100 ns spikes and clamps 400 V transients to 23.2 V - reducing EMI radiated emissions by 12 dBµV/m at 150 MHz. |
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-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same VWM, VBR, VC, and PPPM. | Required for consumer electronics targeting IEC 61249-2-21 compliance; no change in PCB layout or thermal design. | Select when halogen-free material declaration is mandated for final product certification. |
| SMBJ14CAHE3_B/I | AEC-Q101 qualified version with extended temperature validation (-55 °C to +150 °C), same electrical ratings and SMB footprint. | Approved for automotive powertrain and chassis modules; supports PPAP documentation and zero-defect manufacturing traceability. | Choose for automotive OEM BOMs where qualification evidence and lot-level test reports are contractually required. |
Compared with SMBJ14CA-E3/5B, the M3/5B variant adds halogen-free compliance without altering surge performance, while the HE3_B/I version provides full AEC-Q101 validation - enabling drop-in use in industrial designs or mandatory upgrade for automotive Tier 1 suppliers.
Availability
SMBJ14CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line card protection, automotive body control modules, and consumer appliance motor drives requiring stable component supply and consistent surge performance across production batches.
Supply support for SMBJ14CA-E3/5B 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, power efficiency, and automotive-grade qualification.
The SMBJ series targets board-level transient protection in harsh environments - engineered for repeatable clamping, low leakage, and compatibility with high-volume SMT assembly across industrial, telecom, and automotive end markets.
FAQ
What is the clamping voltage of SMBJ14CA-E3/5B at its rated peak pulse current?
The SMBJ14CA-E3/5B has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 25.9 A using the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88392 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ14CA-E3/5B unidirectional or bidirectional, and how does that affect its circuit placement?
SMBJ14CA-E3/5B is a bidirectional TVS diode, meaning it clamps voltage transients equally in both polarities - no cathode band marking is present. This allows direct placement across AC-coupled lines, differential buses like RS-485, or floating power domains without polarity concerns. Unlike unidirectional variants (e.g., SMBJ14A), it eliminates risk of reverse-bias damage during negative-going transients.
Does SMBJ14CA-E3/5B meet automotive qualification standards?
The base SMBJ14CA-E3/5B is commercial-grade and not AEC-Q101 qualified; however, the pin-compatible SMBJ14CAHE3_B/I variant is fully AEC-Q101 qualified for automotive applications. That version undergoes extended temperature cycling, humidity testing, and failure analysis per the AEC standard - making it suitable for body control modules and infotainment power supplies where qualification evidence is contractually required.
What is the thermal resistance and recommended PCB layout for SMBJ14CA-E3/5B?
SMBJ14CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2" per terminal). To sustain repetitive 600 W surges, designers must implement these pad dimensions and avoid thermal isolation - insufficient copper area causes rapid junction temperature rise beyond the +150 °C absolute maximum, risking parametric shift or catastrophic failure.
How does the leakage current of SMBJ14CA-E3/5B impact low-power sensor designs?
SMBJ14CA-E3/5B exhibits ≤1.0 µA maximum reverse leakage current at its 14 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures negligible impact on battery life in always-on sensor nodes - for example, adding only ~0.0086 C/month to a 10 µA system budget - while maintaining tight voltage margin before clamping onset in precision analog front-ends.
SMBJ14CA-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBJ14CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CA-E3/5B 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-E3/5B reliable?
The price and inventory of SMBJ14CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ14CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CA-E3/5B?
SMBJ14CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CA-E3/5B 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-E3/5B?
For technical support, including SMBJ14CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ14CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ14CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ14CA-E3/5B?
All SMBJ14CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ14CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CA-E3/5B Tags
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