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GBLC12CI-LF-T7
UMW
ESD SUPPRESSOR DIODE TVS BI-DIR
65256 Pcs New Original In Stock
19V Clamp 1A (8/20µs) Ipp Tvs Diode Surface Mount SOD-323
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5.0 / 5.0
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GBLC12CI-LF-T7
Product Overview
11037540
DiGi Electronics Part Number
GBLC12CI-LF-T7-DGManufacturer
UMW
GBLC12CI-LF-T7
Description
ESD SUPPRESSOR DIODE TVS BI-DIRInventory
65256 Pcs New Original In Stock
19V Clamp 1A (8/20µs) Ipp Tvs Diode Surface Mount SOD-323
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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365 - Day Quality Guarantee - Every part fully backed.
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GBLC12CI-LF-T7 Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
UMW
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
12V
Voltage - Breakdown (Min)
13.3V
Voltage - Clamping (Max) @ Ipp
19V
Current - Peak Pulse (10/1000µs)
1A (8/20µs)
Power - Peak Pulse
250W
Power Line Protection
No
Applications
Ethernet, USB
Capacitance @ Frequency
0.6pF @ 1MHz
Operating Temperature
-55°C ~ 150°C (TA)
Mounting Type
Surface Mount
Package / Case
SC-76, SOD-323
Supplier Device Package
SOD-323
Datasheet & Documents
HTML Datasheet
GBLC12CI-LF-T7-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
4518-GBLC12CI-LF-T7CT
4518-GBLC12CI-LF-T7TR
4518-GBLC12CI-LF-T7DKR
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Price-wise, this is one of the best options I’ve found in the market.
Dec 02, 2025
DiGi’s shipping speed helps us meet tight deadlines effortlessly.
Dec 02, 2025
Choosing DiGi Electronics was the best decision for a reliable and budget-friendly gaming setup.
Dec 02, 2025
Their efficient delivery system reduces downtime in my projects.
Dec 02, 2025
The value I receive from DiGi’s support and pricing is unmatched.
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Frequently Asked Questions (FAQ)
Can the GBLC12CI-LF-T7 be safely used to protect a 12V industrial Ethernet PHY interface against IEC 61000-4-2 ESD events, and what layout considerations are critical to avoid signal integrity issues?
Yes, the GBLC12CI-LF-T7 is suitable for protecting 12V industrial Ethernet PHYs due to its 12V reverse standoff voltage, 19V max clamping voltage, and ultra-low capacitance of 0.6pF @ 1MHz, which minimizes distortion on high-speed differential pairs. However, to maintain signal integrity and effective ESD suppression, place the TVS diode as close as possible to the connector or PHY input pins, use short, symmetrical traces, and avoid vias or stubs that introduce impedance discontinuities. Ground return paths must be low-inductance—connect directly to a solid ground plane with minimal loop area to ensure fast transient diversion without ringing.
What are the risks of replacing the GBLC12CI-LF-T7 with a cheaper bidirectional TVS like the Littelfuse SMAJ12A in a USB 2.0 data line application, and how do their real-world performance differ under repetitive ESD stress?
Replacing the GBLC12CI-LF-T7 with the SMAJ12A introduces significant reliability risks despite similar nominal specs. The SMAJ12A has a much higher capacitance (~15pF vs. 0.6pF), which can severely degrade USB 2.0 signal integrity at 480 Mbps, causing eye diagram closure and potential enumeration failures. Additionally, the SMAJ12A is rated for only 400W peak pulse power (10/1000µs) versus the GBLC12CI-LF-T7’s 250W (8/20µs)—but the shorter 8/20µs waveform better matches real ESD events. Under repetitive ESD strikes, the UMW device’s lower junction capacitance and optimized doping profile provide more consistent clamping and longer lifespan, making it a safer choice for mission-critical USB interfaces.
Is the GBLC12CI-LF-T7 robust enough for automotive 12V rail protection in a door control module exposed to load dump transients, and what additional circuitry might be required?
The GBLC12CI-LF-T7 alone is insufficient for direct automotive load dump protection (which can exceed 40V for hundreds of milliseconds), as its 19V clamping voltage and 250W peak power rating are not designed for sustained high-energy transients. It can, however, serve as secondary protection behind a primary TVS or clamp circuit (e.g., a 36V unidirectional TVS like the SM8S33A). Use the GBLC12CI-LF-T7 to handle fast, low-energy ESD and fast transient bursts (ISO 7637-2 pulses), while the primary suppressor absorbs the bulk energy. Always include a series resistor or ferrite bead between stages to limit current into the GBLC12CI-LF-T7 and prevent thermal runaway during extended overvoltage events.
How does the GBLC12CI-LF-T7 perform in high-temperature environments like industrial motor controllers operating at 125°C ambient, and are there derating concerns for long-term reliability?
The GBLC12CI-LF-T7 is rated for operation up to 150°C junction temperature, making it technically suitable for 125°C ambient environments if proper thermal management is implemented. However, at elevated temperatures, leakage current increases significantly—though not specified in the datasheet, typical Zener-based TVS diodes exhibit exponential leakage rise above 100°C, which can affect sensitive analog nodes. For long-term reliability in motor controllers, ensure adequate PCB copper pour under the SOD-323 package to act as a heat spreader, and avoid continuous power dissipation near the 250W peak limit. Consider periodic thermal cycling stress; the MSL 1 rating means no moisture-related failure risk, but mechanical fatigue from CTE mismatch over time may affect solder joints in high-vibration settings.
Can I use the GBLC12CI-LF-T7 to replace a unidirectional TVS diode like the PESD12VS1UB in a 12V CAN bus line, and what are the trade-offs in terms of signal symmetry and fault tolerance?
While the GBLC12CI-LF-T7 can replace the PESD12VS1UB in a 12V CAN bus application, there are important trade-offs. The GBLC12CI-LF-T7 is bidirectional, providing symmetric clamping in both polarities, which is beneficial for differential CAN signals that swing above and below ground. However, unidirectional diodes like the PESD12VS1UB typically have lower capacitance and faster response to positive-going transients. The GBLC12CI-LF-T7’s 0.6pF capacitance is still excellent for CAN FD speeds, but its bidirectional nature means it clamps negative transients closer to -0.7V (due to forward conduction), whereas unidirectional devices may allow slightly deeper negative excursions. This rarely impacts functionality but could matter in systems with tight common-mode receiver thresholds. Ensure the replacement maintains the same or better ESD robustness (IEC 61000-4-2 Level 4) and verify signal integrity with eye diagram testing post-layout.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
GBLC12CI-LF-T7 CAD Models
UMW GBLC12CI-LF-T7 PCB symbols & footprints
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