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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
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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 |
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