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Vishay General Semiconductor - Diodes Division SMBJ14CHE3/5B
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- Part No.:
- SMBJ14CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CHE3/5B.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,554
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Product details
Overview
SMBJ14CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ14CHE3/5B datasheet, SMBJ14CHE3/5B pinout, SMBJ14CHE3/5B application, or SMBJ14CHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and real-world protection use cases for robust ESD and surge design validation.
Technical Context
This TVS diode operates as a unidirectional clamp, conducting only during reverse overvoltage events while remaining high-impedance under normal bias. Its glass-passivated junction ensures stable breakdown behavior, and its low incremental surge resistance enables precise voltage limiting during fast transients.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation in thermally constrained PCB layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - Confirmed minimum/maximum breakdown threshold; ensures predictable turn-on across production lots. |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized surge waveform; validates compliance with IEC 61000-4-5 Level 3. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current handled without degradation; determines minimum trace width and fuse coordination. |
| TJmax | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial ambient environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
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; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; completes clamping path during reverse transient. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply or CAN_H); conducts when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, body electronics, and ADAS modules. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications without external series impedance. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage stress on downstream ICs - critical for protecting 16 V absolute maximum-rated microcontrollers and transceivers. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and humidity stress. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 14 V. Use Value: Limits peak voltage to 23.2 V during 25.9 A transients, preserving integrity of 32-bit MCUs and CAN transceivers with 27 V absolute max ratings. |
Use Scenario: Shielding analog and digital signal lines (e.g., 4–20 mA, RS-485) in factory automation sensors from EFT and surge coupling. IC Role / Device Role / Timing Role: Point-of-entry TVS on field-side interface traces to absorb coupled transients before they reach isolation barriers. Use Value: Clamps 1 kV/500 A surge to ≤23.2 V within <1 ns, preventing latch-up in isolated ADC drivers and level shifters. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Safeguarding PoE-powered network switches and base stations against AC/DC adapter transients and lightning-induced surges on 48 V inputs. IC Role / Device Role / Timing Role: Primary TVS on secondary-side 48 V bus, coordinated with upstream fuses and MOVs. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, enabling robust front-end protection without thermal runaway. |
Use Scenario: Guarding USB-C and barrel-jack inputs in smart home hubs and portable audio devices against user-induced plug-in surges. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS line, placed immediately after connector. Use Value: Delivers sub-1 ns response and 23.2 V clamping to prevent damage to USB PD controllers rated for 20 V max input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHE3/5B | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Not approved for automotive production; suitable for industrial or consumer designs without automotive qualification mandates. | Select SMBJ14AHE3/5B when AEC-Q101 is not required and cost optimization is prioritized. |
| SMAJ14AHE3/A | Lower 400 W PPPM; SMA (DO-214AC) package with smaller footprint and higher RθJA (140 °C/W). | Limited to lower-energy transients; requires tighter layout control due to reduced thermal mass and surge margin. | Choose SMAJ14AHE3/A only if board space is constrained and surge threat level is below IEC 61000-4-5 Level 2. |
Compared with SMBJ14AHE3/5B and SMAJ14AHE3/A, SMBJ14CHE3/5B provides automotive-grade reliability and full 600 W surge handling in the industry-standard SMB footprint - making it the preferred choice where qualification, margin, and thermal robustness are non-negotiable.
Availability
SMBJ14CHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14CHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be mitigated without compromising signal integrity or thermal safety.
FAQ
What is the clamping voltage of SMBJ14CHE3/5B at its rated peak pulse current?
The SMBJ14CHE3/5B has a maximum clamping voltage (VC) of 23.2 V at 25.9 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events - essential for verifying compatibility with downstream IC absolute maximum ratings.
Is SMBJ14CHE3/5B qualified for automotive applications?
Yes, SMBJ14CHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Rev. 09-Jan-2024). This qualification covers temperature cycling, high-temperature reverse bias, and surge endurance testing - validating its use in engine control units, body electronics, and ADAS subsystems.
What is the standoff voltage (VWM) and why does it matter for SMBJ14CHE3/5B?
The SMBJ14CHE3/5B has a 14 V standoff voltage (VWM), meaning it remains non-conductive up to this reverse voltage under normal operation. This parameter ensures no leakage or power loss during steady-state 12 V system operation while providing sufficient margin below the 15.6 V minimum breakdown voltage - critical for avoiding false triggering in noisy automotive and industrial power environments.
How does the SMB (DO-214AA) package of SMBJ14CHE3/5B compare thermally to smaller alternatives?
The SMB package of SMBJ14CHE3/5B offers a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads - significantly lower than the 140 °C/W of the SMA (DO-214AC) package used in SMAJ14AHE3/A. This enables higher sustained surge repetition rates and better thermal stability in compact, high-density layouts without forced airflow.
Can SMBJ14CHE3/5B be used in bidirectional protection circuits?
No - SMBJ14CHE3/5B is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ14CA). Using SMBJ14CHE3/5B in AC-coupled or symmetrical signal lines would result in forward conduction during negative half-cycles and potential failure.
SMBJ14CHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14CHE3/5B FAQ
1.How can I place an order for SMBJ14CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CHE3/5B 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 SMBJ14CHE3/5B reliable?
The price and inventory of SMBJ14CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ14CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CHE3/5B?
SMBJ14CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CHE3/5B 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 SMBJ14CHE3/5B?
For technical support, including SMBJ14CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CHE3/5B requirements.
6.How does Aetrix verify that SMBJ14CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ14CHE3/5B 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 SMBJ14CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ14CHE3/5B?
All SMBJ14CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CHE3/5B, 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 SMBJ14CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ14CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CHE3/5B Tags
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