Product Detail
- Working range: 3V-15V.
- Models: ESD5V, SMAJ5.0.
- Packages: SOD, SMAJ, arrays.
- Use case: logic protection.
Product Description
This low voltage TVS diode page is for protecting logic rails, USB ports, sensor inputs and IC-side low-voltage lines. You can compare ESD5V, SMAJ5.0, SMBJ12, low-capacitance arrays and SOD TVS parts by working voltage, clamping voltage, capacitance, peak pulse rating, package and connector placement. Low-voltage protection is sensitive because the normal signal is close to the protection threshold. Lian Tuo helps you choose a TVS part that protects the line without loading the signal or clamping too late. That keeps protection close to the sensitive low-voltage line.
Our Low Voltage TVS Diode Options
| ESD5V Low Voltage TVS Diode | Compact ESD protection option for USB, logic and IC pins with low working voltage. |
| SMAJ5.0 Low Voltage TVS Diode | SMA package for 5V rail protection where pulse power needs more margin. |
| SMBJ12 Low Voltage TVS Diode | 12V class option for low-voltage power rails needing stronger surge handling. |
| Low Capacitance TVS Array | Multi-line protection direction for data ports where signal loading must stay low. |
| SOD Low Voltage TVS Diode | Small package for compact boards, connector-side placement and tight routing. |
Feature Box
- Low Working Voltage3V-15V options match logic and connector rails.
- Clamp ControlClamping voltage is checked against IC limits.
- Low CapacitanceData-line loading can be reviewed before samples.
- Close PlacementPackages support connector-side protection layouts.
Protect Sensitive Rails
A low voltage TVS diode must protect a rail that may operate close to the device standoff voltage. Choosing too low can interfere with normal signals, while choosing too high can clamp late. Start with working voltage, signal swing and protected IC limits. It also helps avoid adding capacitance where the signal cannot tolerate it.
Watch Capacitance
USB, sensor and high-speed logic lines can be affected by TVS capacitance. A low voltage TVS diode should be chosen by capacitance as well as surge rating. If the line carries data, low-capacitance arrays may be safer than power-style TVS parts. That keeps protection close to the sensitive low-voltage line.
Place Near Connectors
TVS protection works best when surge current is diverted before it travels deep into the PCB. A low voltage TVS diode should usually sit near the connector or exposed line entrance. Package size and grounding path matter as much as the part number. It also helps avoid adding capacitance where the signal cannot tolerate it.
Choose Clamp Margin
The protected IC has an absolute maximum voltage, while the TVS has a clamping voltage under surge. Lian Tuo can help compare low voltage TVS diode options so the clamp level is useful without loading the normal circuit. That keeps protection close to the sensitive low-voltage line. It also helps avoid adding capacitance where the signal cannot tolerate it.
Vertical Product Applications
USB And Data Ports
Use a low voltage TVS diode near USB and data ports when ESD protection must stay close to the connector. The selected part should match line voltage, capacitance limit and grounding path so the signal remains clean. It also helps avoid adding capacitance where the signal cannot tolerate it. That keeps protection close to the sensitive low-voltage line.
Logic Power Rails
Logic power rails need TVS parts that clamp before sensitive ICs are damaged, without conducting during normal operation. A low voltage TVS diode should be checked by working voltage, pulse rating and board ground quality. That keeps protection close to the sensitive low-voltage line. It also helps avoid adding capacitance where the signal cannot tolerate it.
Sensor Input Lines
Sensor input lines can be exposed to ESD or cable surges while carrying small signals. A low voltage TVS diode should protect the input without adding too much capacitance or leakage. Placement near the entry point is important. It also helps avoid adding capacitance where the signal cannot tolerate it.
FAQ
How do I choose a low voltage TVS diode?
Start with normal working voltage, protected IC limit, clamping voltage, capacitance, package and pulse requirement. Low-voltage lines are sensitive, so both protection strength and signal loading should be reviewed. It also helps avoid adding capacitance where the signal cannot tolerate it.
Why is capacitance important for TVS parts?
Capacitance can load high-speed or sensitive signal lines and distort the waveform. USB, communication and sensor lines often need low-capacitance TVS options instead of larger power TVS packages. That keeps protection close to the sensitive low-voltage line. It also helps avoid adding capacitance where the signal cannot tolerate it.
Can a 5V TVS protect a 3.3V line?
Sometimes, but it depends on working voltage, leakage and clamping level. A part that is safe for 5V may clamp too late for a 3.3V IC, so compare the protected device limits before approval. It also helps avoid adding capacitance where the signal cannot tolerate it.
Where should low-voltage TVS diodes be placed?
Place them near connectors or exposed line entrances with a short, low-impedance path to ground. Poor placement can let surge current travel through the board before the TVS diverts it. That keeps protection close to the sensitive low-voltage line. It also helps avoid adding capacitance where the signal cannot tolerate it.
What data helps quote low-voltage TVS parts?
Send working voltage, signal type, capacitance limit, package, pulse requirement, target model and quantity. A connector or layout photo helps us understand placement and grounding constraints. It also helps avoid adding capacitance where the signal cannot tolerate it. That keeps protection close to the sensitive low-voltage line.
Should I choose unidirectional or bidirectional TVS?
It depends on the line polarity and signal swing. DC rails often use unidirectional parts, while AC or bidirectional signal lines may need bidirectional protection. Confirm line behavior before choosing. That keeps protection close to the sensitive low-voltage line. It also helps avoid adding capacitance where the signal cannot tolerate it.
Can Lian Tuo support ESD and TVS arrays?
Yes. We can compare ESD5V, SMAJ5.0, SMBJ12, low-capacitance arrays and SOD TVS parts by voltage, capacitance, package and protection role before samples. It also helps avoid adding capacitance where the signal cannot tolerate it. That keeps protection close to the sensitive low-voltage line.
