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Vishay General Semiconductor - Diodes Division SMB8J14C-E3/5B
- Part No.:
- SMB8J14C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14C-E3/5B.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,899
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Product details
Overview
SMB8J14C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 34.5 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface and industrial I/O port protection.
For engineers reviewing the SMB8J14C-E3/5B datasheet, SMB8J14C-E3/5B pinout, SMB8J14C-E3/5B application, or SMB8J14C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low leakage (<1 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection against voltage transients induced by ESD, inductive switching, and lightning surges without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive stress.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J14C-E3/5B supports automotive-grade reliability in engine control units, body electronics, and ADAS sensor interfaces where failure modes must be mitigated without adding series impedance or signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse 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 breakdown threshold ensuring reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 23.2 V at 34.5 A (10/1000 µs) - Limits downstream voltage stress to protect 24 V-rated ICs and MOSFETs. |
| PPPM (Peak Pulse Power) | 800 W - Sustains high-energy transients per ISO 7637-2 Pulse 1/2b/5a without degradation. |
| IPPM (Peak Pulse Current) | 34.5 A - Withstands automotive load-dump and ESD-induced surge currents per IEC 61000-4-2 Level 4. |
| ID (Reverse Leakage) | <1 µA at 14 V - Minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
| TJmax | 150 °C - Enables operation in under-hood environments and thermally constrained industrial enclosures. |
Pinout & Package
DO-214AA (SMB) surface-mount package with matte tin-plated leads; no polarity marking (bi-directional device); meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either lead connects to protected line, other to ground or reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, chassis, and infotainment systems per stress test requirements. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low parameter drift over temperature and lifetime. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture-related popcorning or delamination. |
| Low clamping ratio (VC/VWM = 1.66) | Delivers tighter voltage limiting than typical TVS devices, reducing margin required for downstream component ratings. |
| RoHS-compliant, halogen-free | Meets JEDEC JS709A and EU Directive 2011/65/EU; suitable for green manufacturing and export compliance. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and chassis ground to shunt transient energy before reaching sensitive input stages. Use Value: Maintains signal integrity during 10/1000 µs surges up to 800 W while adding zero propagation delay or capacitance-induced signal distortion. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ground loop transients in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage protection element across 24 V DC input terminals, coordinated with upstream fusing and filtering. Use Value: Clamps transients to ≤23.2 V within nanoseconds, preventing latch-up or permanent damage to microcontroller GPIOs and optocouplers. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485/RS-232 transceivers in base station backhaul equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line transient suppression device mounted directly at connector entry point, referenced to local ground plane. Use Value: Withstands repeated 800 W pulses without parameter shift, eliminating need for secondary protection stages in space-constrained telecom modules. |
Use Scenario: Securing microcontroller reset lines and button inputs in washing machines and HVAC controllers exposed to motor commutation noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) bi-directional clamp that avoids loading weak pull-up networks while suppressing fast ESD events. Use Value: Prevents spurious resets and false key presses caused by 8 kV contact ESD, verified per IEC 61000-4-2 Level 4. |
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 | Same VWM (14 V), identical DO-214AA package, but rated for 1000 W uni-directional only; bi-directional variant not offered. | Limited to uni-directional protection schemes requiring explicit polarity assignment; unsuitable for AC-coupled or floating signal lines. | Select SMBJ14CA only when circuit topology enforces unidirectional current flow and higher 1000 W rating is required. |
| SMCJ14CA | Same VWM and bi-directionality, but larger DO-214AB (SMC) package with 1500 W PPPM and lower RθJA (40 °C/W). | Better thermal performance and surge handling, but requires larger PCB area and may not fit tight-layout automotive modules. | Choose SMCJ14CA when board space permits and higher surge endurance (>800 W) is mandatory for harsh environments. |
Compared with SMBJ14CA and SMCJ14CA, SMB8J14C-E3/5B uniquely balances AEC-Q101 qualification, bi-directional symmetry, compact SMB footprint, and 800 W capability-making it optimal for space-constrained, automotive-grade bidirectional protection where layout density and qualification compliance are non-negotiable.
Availability
SMB8J14C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J14C-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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where compact size and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMB8J14C-E3/5B at its rated peak pulse current?
The SMB8J14C-E3/5B has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 34.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage stress during surge events. The SMB8J14C-E3/5B maintains this clamping performance across its qualified temperature range (-55 °C to +150 °C).
Is SMB8J14C-E3/5B suitable for automotive applications?
Yes, SMB8J14C-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction-glass-passivated junction, MSL Level 1 rating, and -55 °C to +150 °C operating range-meets stringent automotive reliability requirements. The SMB8J14C-E3/5B is marked with "HE3" suffix variants for full AEC-Q101 compliance; the "E3" suffix denotes RoHS-compliant commercial grade with identical electrical specs.
How does SMB8J14C-E3/5B differ from uni-directional SMBJ14A variants?
SMB8J14C-E3/5B is bi-directional with symmetrical clamping in both polarities, whereas SMBJ14A is uni-directional and features a cathode band marking. The SMB8J14C-E3/5B has a lower peak pulse power rating (800 W vs. 1000 W) due to dual-path conduction, but enables protection on AC-coupled, floating, or polarity-agnostic lines without external diode pairing. Its VBR range (15.6–17.2 V) and VC (23.2 V) are optimized for bi-directional operation, unlike the SMBJ14A's uni-directional parameters.
What is the thermal resistance of SMB8J14C-E3/5B, and how does it affect PCB layout?
The SMB8J14C-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's DO-214AA outline. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid thermal isolation; insufficient copper increases RθJA and risks exceeding the 150 °C TJmax. The SMB8J14C-E3/5B's thermal performance is validated for standard SMT reflow profiles.
Does SMB8J14C-E3/5B require orientation during PCB placement?
No, SMB8J14C-E3/5B does not require orientation during placement because it is a bi-directional TVS diode with symmetrical terminals-neither end is designated anode or cathode. There is no polarity marking on the device body. Either lead may connect to the protected line and the other to ground or reference, simplifying automated assembly and eliminating orientation-related assembly errors. This symmetry is intrinsic to the SMB8J14C-E3/5B's design and confirmed in Vishay's mechanical data and electrical characteristics tables.
SMB8J14C-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:
- 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):
- 31A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J14C-E3/5B FAQ
1.How can I place an order for SMB8J14C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14C-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 SMB8J14C-E3/5B reliable?
The price and inventory of SMB8J14C-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 SMB8J14C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J14C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14C-E3/5B?
SMB8J14C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14C-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 SMB8J14C-E3/5B?
For technical support, including SMB8J14C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14C-E3/5B requirements.
6.How does Aetrix verify that SMB8J14C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J14C-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 SMB8J14C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J14C-E3/5B?
All SMB8J14C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14C-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 SMB8J14C-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J14C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14C-E3/5B Tags
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