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Vishay General Semiconductor - Diodes Division SMB8J14C-E3/52
- Part No.:
- SMB8J14C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14C-E3/52.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J14C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for robust overvoltage protection on signal and power lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V clamping voltage (VC) at 34.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMB8J14C-E3/52 datasheet, SMB8J14C-E3/52 pinout, SMB8J14C-E3/52 application, or SMB8J14C-E3/52 equivalent, key selection criteria include bi-directional surge capability, AEC-Q101 qualification for automotive use, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast clamping response under high-energy transients.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), confirming suitability for sustained surge duty in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 23.2 V at 34.5 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels in automotive load-dump scenarios. |
| PPPM | 800 W - Peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on protected lines. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor interfaces. |
| TJ max | +150 °C - Junction temperature rating supporting under-hood automotive deployment and industrial high-ambient environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC standard. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking (unlike uni-directional variants which feature cathode band). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with 5.0 mm × 5.0 mm recommended copper pad layout per terminal for thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either end serves as input/output for bidirectional surge energy diversion to ground. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; body acts as thermal mass and mechanical anchor-no electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional architecture | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded power rails without polarity concerns. |
| AEC-Q101 qualification | Validates long-term reliability in automotive ECUs, ADAS sensors, and infotainment systems subject to harsh thermal cycling and vibration. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in humid industrial or outdoor deployments. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning-reduces manufacturing complexity and cost. |
| RoHS-compliant matte tin leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A-critical for high-reliability consumer and medical devices. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting wheel speed, pressure, or temperature sensors exposed to ISO 7637-2 load dump and jump-start transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Bi-directional TVS placed between sensor signal line and chassis ground to clamp ±100 V spikes within nanoseconds. Use Value: Prevents latch-up or permanent damage to analog front-end amplifiers and ADCs by limiting voltage to ≤23.2 V during 34.5 A surge events. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) in factory automation PLCs subjected to EFT and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Paired TVS on A/B differential pair to suppress common-mode transients while preserving signal integrity up to 10 Mbps. Use Value: Maintains bus uptime by absorbing 800 W surge energy without degradation-verified over 1000+ surge cycles per IEC 61000-4-5. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in set-top boxes and smart displays from ESD (±15 kV contact) and hot-plug induced transients. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed directly at connector to shunt ESD current before reaching USB PHY. Use Value: Achieves <1.0 µA leakage at 14 V VWM-minimizing standby current drain while clamping ESD to <23.2 V in <1 ns. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers in residential gateways against longitudinal surges from telephone line induction or lightning coupling. IC Role / Device Role / Timing Role: Primary protection device on tip/ring lines upstream of hybrid transformer and line codec ICs. Use Value: Withstands repeated 10/1000 µs surges up to 800 W-meeting GR-1089-CORE telecom surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA | Same VWM (14 V), identical DO-214AA package, but lower PPPM (600 W vs. 800 W) and higher VC (25.5 V vs. 23.2 V). | Less robust for high-energy automotive load-dump events; suitable only for lower-tier industrial or consumer surge classes. | Select SMBJ14CA only when system-level surge testing confirms 600 W sufficiency and 2.3 V higher clamping is acceptable. |
| SMCJ14CA | Same VWM and bi-directionality, but larger DO-214AB (SMC) package (7.11 mm × 6.22 mm); delivers 1500 W PPPM and lower VC (23.2 V same, but at 65.1 A). | Requires PCB real estate increase and higher thermal mass; preferred where >800 W surge margin is mandated (e.g., EV charging infrastructure). | Choose SMCJ14CA when board space allows and system-level standards demand ≥1500 W surge rating-no change to circuit function. |
Compared with SMBJ14CA, SMB8J14C-E3/52 offers 33 % higher surge power and tighter clamping; versus SMCJ14CA, it trades 40 % smaller footprint for 47 % lower peak current handling-enabling compact, automotive-qualified protection where space and weight are constrained.
Availability
SMB8J14C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and consumer USB interface designs requiring stable component supply, AEC-Q101 assurance, and RoHS compliance.
Supply support for SMB8J14C-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 protection devices 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 space, thermal performance, and surge resilience are critical.
FAQ
What is the clamping voltage of SMB8J14C-E3/52 and how is it measured?
The SMB8J14C-E3/52 has a maximum clamping voltage (VC) of 23.2 V, measured at a peak pulse current (IPPM) of 34.5 A using the standardized 10/1000 µs double-exponential surge waveform. This value reflects the actual voltage seen by protected circuitry during worst-case transient events and is confirmed per ANSI/IEEE C62.35 test methodology. The SMB8J14C-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J14C-E3/52 suitable for automotive applications?
Yes, SMB8J14C-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It passes accelerated stress tests covering high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and ESD per JS-001. Its 14 V VWM aligns with 12 V vehicle electrical systems, and its 800 W PPPM handles ISO 7637-2 Pulse 5a load-dump transients. The SMB8J14C-E3/52 is commonly deployed in ADAS camera modules and body control units.
How does SMB8J14C-E3/52 differ from uni-directional SMB10J14A?
SMB8J14C-E3/52 is bi-directional with symmetrical clamping for AC or differential signals, while SMB10J14A is uni-directional and requires correct polarity orientation (cathode band marked). SMB8J14C-E3/52 has lower PPPM (800 W vs. 1000 W) and higher ID leakage tolerance (1.0 µA vs. 5.0 µA at VWM), but identical VWM (14 V) and VC (23.2 V). The SMB8J14C-E3/52 eliminates polarity-check steps in automated assembly and supports floating-line protection not possible with uni-directional variants.
What is the thermal resistance of SMB8J14C-E3/52 and why does it matter?
SMB8J14C-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 5.0 mm × 5.0 mm copper pads per terminal. These values determine how effectively heat from surge dissipation transfers away from the silicon junction. Lower RθJL enables higher repetitive surge capability; the 20 °C/W rating confirms efficient conduction into PCB copper, critical for maintaining <150 °C junction temperature during burst-mode transients in SMB8J14C-E3/52 applications.
Can SMB8J14C-E3/52 be used in place of SMBJ14CA?
SMB8J14C-E3/52 can replace SMBJ14CA in most designs due to identical VWM (14 V), package (DO-214AA), and bi-directional functionality-but with superior surge capability: 800 W PPPM vs. 600 W, and 23.2 V VC vs. 25.5 V. No PCB changes are required, as both share the same footprint and soldering profile (MSL Level 1, 260 °C peak). However, verify that downstream circuitry tolerates the slightly higher VBR range (15.6–17.2 V vs. 15.0–16.7 V) of SMB8J14C-E3/52 if margin is tight.
SMB8J14C-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):
- 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-E3/52 FAQ
1.How can I place an order for SMB8J14C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14C-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 SMB8J14C-E3/52 reliable?
The price and inventory of SMB8J14C-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 SMB8J14C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J14C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14C-E3/52?
SMB8J14C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14C-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 SMB8J14C-E3/52?
For technical support, including SMB8J14C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14C-E3/52 requirements.
6.How does Aetrix verify that SMB8J14C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J14C-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 SMB8J14C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J14C-E3/52?
All SMB8J14C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14C-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 SMB8J14C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J14C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14C-E3/52 Tags
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