ITA18B1RL STMicroelectronics TVS Diode (Bi-directional) (Small Outline Packages) In Stock
The ITA18B1RL is a bidirectional 6-channel Transil TVS diode array from STMicroelectronics designed to protect data lines from ESD and transient overvoltage events. It features a 18 V breakdown voltage, 28 V clamping voltage, and common-cathode 6-element configuration in an 8-pin small-outline package. Suitable for multi-line ESD protection in industrial and consumer electronics.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- END OF LIFE
- Datasheet
- ITA18B1RL Datasheet PDF
- Category
- TVS Diode (Bi-directional)
- Price
- From $0.5400(MOQ 10)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ITA18B1RL?
- 6-channel common-cathode bidirectional TVS array with 18 V breakdown voltage protecting up to 6 independent data lines simultaneously in a single 8-pin package
- 28 V maximum clamping voltage with fast sub-nanosecond response time clamping ESD transients before they reach sensitive downstream ICs
- 350 pF per channel capacitance in compact SOIC-8 footprint enabling protection of moderate-speed data buses without excessive signal degradation
What is ITA18B1RL used for?
The ITA18B1RL is used to protect multi-line data buses such as RS-485, CAN, and industrial fieldbus interfaces from ESD strikes and conducted transient overvoltages up to its 28 V clamping level. Its 6-channel common-cathode topology allows a single device to guard all lines of a 6-wire interface, reducing protection BOM to one component. The device is also applied in consumer electronics port protection, protecting USB, HDMI, or GPIO lines from electrostatic discharge events that exceed 18 V.
What are the specifications of ITA18B1RL?
| Factory Lead Time | 15Weeks |
| YTEOL | 1 |
| Breakdown Voltage-Min | 18V |
| Clamping Voltage-Max | 28V |
| Configuration | COMMON CATHODE, 6 ELEMENTS, 6 CHANNEL |
| Diode Capacitance-Min | 350pF |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Non-rep Peak Rev Power Dis-Max | 300W |
| Number of Elements | 6 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | BIDIRECTIONAL |
| Qualification Status | Not Qualified |
| Reference Standard | IEC-61000-4-2; MIL-STD-883G |
| Rep Pk Reverse Voltage-Max | 15V |
| Reverse Current-Max | 4 µA |
| Reverse Test Voltage | 15V |
| Surface Mount | YES |
| Technology | AVALANCHE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
| Country of Origin | Mainland China |
Where can I find the ITA18B1RL datasheet?
ITA18B1RL Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ITA18B1RL?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many data lines can the ITA18B1RL protect simultaneously, and what is its breakdown voltage?
The ITA18B1RL integrates 6 bidirectional TVS elements in a common-cathode configuration, allowing it to protect 6 independent data lines in parallel. Each channel has a minimum breakdown voltage of 18 V and a maximum clamping voltage of 28 V, so transients that exceed 18 V are clamped before they can damage downstream interface ICs.
What is the per-channel capacitance of the ITA18B1RL, and does it affect high-speed serial signals?
Each channel of the ITA18B1RL presents a minimum diode capacitance of 350 pF when reverse-biased at the operating voltage. At 350 pF per channel, signal degradation becomes noticeable above a few MHz, so this device is best suited for protecting lower-speed buses such as RS-485 up to 10 Mbps or CAN at 1 Mbps rather than high-speed differential pairs operating above 100 MHz.
Which interface protocols are well matched to the ITA18B1RL protection level, given its 18 V to 28 V clamp range?
The 18 V breakdown and 28 V clamping voltage window makes the ITA18B1RL well matched to RS-485 transceivers rated for ±15 V common-mode, industrial 24 V I/O lines, and CAN bus interfaces where normal operating voltages stay well below 18 V but transients from inductive loads or connector hot-plug events can reach tens of volts. It is less suitable for 3.3 V LVDS or USB SuperSpeed, where a lower-voltage TVS array with under 5 pF capacitance is preferred.
How does choosing the ITA18B1RL over 6 discrete TVS diodes reduce BOM cost and board space?
Replacing 6 individual SOD-323 TVS diodes with the ITA18B1RL reduces the protection-circuit footprint from roughly 6 separate 2-pin packages to a single 8-pin SOIC body, cutting board area used for protection components by approximately 60%. The single-component BOM also simplifies procurement, reduces placement pick-and-place cycles, and lowers the risk of mismatch between individual diode lots in production.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.5200 | $15.20 |
| 100+ | $1.0400 | $104.00 |
| 500+ | $0.8300 | $415.00 |
| 1000+ | $0.7815 | $781.47 |
| 2500+ | $0.5490 | $1372.50 |
| 5000+ | $0.5400 | $2700.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
SMAJ100CA
LITTELFUSE
TVS Diode (Bi-directional)
SMDJ28CA
LITTELFUSE
TVS Diode (Bi-directional)
SMCJ30CA
LITTELFUSE
TVS Diode (Bi-directional)
SRDA3.3-4BTG
LITTELFUSE
TVS Diode (Bi-directional)
VS5V0BB1EST15R
ROHM Semiconductor
TVS Diode (Bi-directional)
SP1002-01JTG
LITTELFUSE
TVS Diode (Bi-directional)
ESD5481MUT3G
ON Semiconductor
TVS Diode (Bi-directional)
SMDJ24CA-T7
LITTELFUSE
TVS Diode (Bi-directional)
5.0SMDJ48CA
LITTELFUSE
TVS Diode (Bi-directional)
PGB2010402KRHF
LITTELFUSE
TVS Diode (Bi-directional)
SMAJ15CA
LITTELFUSE
TVS Diode (Bi-directional)
SMAJ51CA
LITTELFUSE
TVS Diode (Bi-directional)
SMAJ30CA
LITTELFUSE
TVS Diode (Bi-directional)
PGB1010603NRHF
LITTELFUSE
TVS Diode (Bi-directional)
CDSOD323-T05LC
Bourns
TVS Diode (Bi-directional)
RCLAMP0582N.TCT
SEMTECH
TVS Diode (Bi-directional)
SMBJ250CA
LITTELFUSE
TVS Diode (Bi-directional)
UCLAMP0511T.TCT
SEMTECH
TVS Diode (Bi-directional)
VCUT03E1-SD0-G4-08
Vishay
TVS Diode (Bi-directional)
VBUS05L1-DD1-G-08
Vishay
TVS Diode (Bi-directional)
VCUT0714A-HD1-GS08
Vishay
TVS Diode (Bi-directional)
SMAJ45CA
LITTELFUSE
TVS Diode (Bi-directional)
CDSOT23-0502B
Bourns
TVS Diode (Bi-directional)
VS5V0BA1FST40NB
ROHM Semiconductor
TVS Diode (Bi-directional)