PESD5V0S2BT - 5V Bidirectional Dual ESD TVS Diode | Nexperia
N.º da peça: PESD5V0S2BT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0.05 | $0,05 |
| 10 | $0.04 | $0,40 |
| 100 | $0.025 | $2,50 |
| 500 | $0.02 | $10,00 |
| 1.000 | $0.0172 | $17,20 |
PESD5V0S2BT Visão geral
A TVS (Transient Voltage Suppressor) diode is a clamp-type protection device in the broader family of circuit protection components (ESD protection -> TVS diode -> surge protector -> discrete semiconductor). When a transient voltage exceeds the diode standoff level, the junction avalanches within nanoseconds, diverting the surge current to ground and holding the line at a safe clamping voltage, thereby protecting downstream ICs such as transceivers, MCU I/O pins, and connectors.
Key features include the bidirectional configuration (no polarity concerns on symmetric lines), dual-channel integration (two protection diodes in one 3-pin package saves board space versus two discrete diodes), and low line capacitance that preserves signal integrity on medium-speed data lines. The SOT23 package is one of the industry's most widely adopted footprints, ensuring second-source availability and easy assembly on standard SMD lines.
The device's bidirectional symmetrical clamping characteristic makes it well suited to differential and single-ended lines with no fixed polarity, including RS-485 and CAN bus lines, USB D+/D- lines in legacy designs, and general-purpose port protection.
Typical applications include automotive and industrial communication bus protection, notebook and consumer device I/O ports, and set-top box or router Ethernet/USB front ends. The PESD5V0S2BT-Q variant is available for AEC-Q100 automotive environments.
Design consideration: verify total line capacitance budget at high data rates, and place the diode as close as possible to the connector so the surge is clamped before it radiates across the PCB.
This page adds value beyond the datasheet by consolidating verified drop-in alternatives (including the Nexperia PESD5V0S2BT-Q, PESD5V0U2BT, and onsemi equivalents), practical design notes, pricing, and comparison tables in one place.
Alternativas drop-in para PESD5V0S2BT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
Nenhuma alternativa drop-in disponível para este produto.
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| Configuration | Bidirectional double (dual-channel) ESD protection diode |
| Number of Protected Lines | 2 |
| Reverse Standoff Voltage (VRRM) | 5 V |
| Maximum Clamping Voltage | 14 V |
| Peak Pulse Current (Ipp) | 12 A (8/20 us) |
| Polarity | Bidirectional |
| Technology | Avalanche TVS / ESD protection diode |
| Encapsulamento | SOT23 (TO-236AB) |
| Tipo de montagem | Surface Mount (SMD) |
| Número de pinos | 3 |
| Peak Reflow Temperature | 260 C |
| Automotive Variant | PESD5V0S2BT-Q (automotive qualified) |
| Status RoHS | Compliant |
| Typical Applications | Data line and transmission line ESD/EFT/lightning protection |
Configuração de pinos do PESD5V0S2BT
| Pino 1 | I/O1 — Bidirectional ESD protection diode 1 - line terminal (anode/cathode reversible) |
| Pino 2 | GND — Ground reference terminal |
| Pino 3 | I/O2 — Bidirectional ESD protection diode 2 - line terminal (anode/cathode reversible) |
Aplicações típicas
PESD5V0S2BT é adequado para 6 aplicaçãos: CAN Bus ESD Protection, USB Data Line Protection, RS-485 and Industrial Field Bus Protection, Automotive Body Electronics and LIN Ports, Consumer Device I/O and Audio Jack Protection, Networking Equipment Port Protection.
CAN Bus ESD Protection
The PESD5V0S2BT protects the CANH and CANL lines of a CAN bus against ESD strikes, EFT bursts, and lightning-induced transients. Its 5V bidirectional standoff accommodates the recessed/dominant CAN signaling, while the 14V clamping voltage and 12A (8/20 us) peak pulse current rating divert surge energy away from the CAN transceiver. Because the device integrates two bidirectional diodes in one SOT23 package, both bus lines are protected by a single component placed near the connector. For CAN FD at higher bit rates, verify the line capacitance against the Nexperia datasheet so signal edges are not degraded. The same footprint accommodates the automotive PESD5V0S2BT-Q variant for vehicle deployments requiring qualified parts.
Recomendado
USB Data Line Protection
USB D+ and D- lines exposed on external connectors are prime ESD entry points, and the PESD5V0S2BT addresses them with a single SOT23 component: pin 1 on D+, pin 3 on D-, pin 2 to ground. Its bidirectional configuration matches the symmetric 0-3.3V USB signaling with no polarity concerns, and the 14V clamp keeps transients well below the 5V-tolerant transceiver limits. The device's low capacitance profile is adequate for USB 2.0 full-speed and high-speed operation; for USB 3.x superspeed lanes, swap to the ultra-low-capacitance PESD5V0U2BT, which uses the identical footprint. Place the diode within millimeters of the USB receptacle so the surge is clamped before radiating across the board.
Recomendado
RS-485 and Industrial Field Bus Protection
Industrial RS-485 and Modbus networks run long cables through electrically noisy environments, making them susceptible to EFT and induced lightning surges. The PESD5V0S2BT clamps both bus wires with its 14V maximum clamping voltage and absorbs up to 12A of 8/20 us surge current, protecting the RS-485 transceiver at the node. The bidirectional, polarity-free diode structure suits the differential line without orientation concerns during assembly. Combine the TVS diode with a series PTC and galvanic isolation for harsh installations per standard field-bus protection practice. The low-cost SOT23 package allows protection at every node, not just at the master, keeping total BOM cost minimal across large installations.
Recomendado
Automotive Body Electronics and LIN Ports
In automotive modules, connector pins for LIN, sensor lines, and switch inputs face load-dump-adjacent transients and ESD during service and assembly. The PESD5V0S2BT-Q variant provides the same 5V standoff, 14V clamp, and 12A surge ratings in a package qualified for automotive environments, protecting two low-speed lines with one component. Its bidirectional clamping suits sensor and switch lines that swing around ground without a fixed polarity. The small SOT23 footprint fits dense body-control-module PCBs, and the 260C reflow tolerance supports standard lead-free automotive assembly profiles. Validate the surge requirement against the OEM transient specification (for example 12V system pulse tests) before finalizing the protection scheme.
Recomendado
Consumer Device I/O and Audio Jack Protection
Notebooks, set-top boxes, routers, and consumer electronics expose user-accessible ports that accumulate ESD from human contact. The PESD5V0S2BT provides two lines of protection per SOT23 package at a per-unit cost measured in cents (LCSC listings from $0.0172 as of 2026-10-20), so designers can afford comprehensive port protection across all connectors. Its 5V standoff fits 3.3V and 5V logic lines, and the 14V clamp shields SoC I/O banks from human-body-model ESD events. For analog audio lines the bidirectional clamp prevents audible popping during discharge events. Place one device per connector pair, adjacent to the physical port, and route the ground return directly to the chassis ground plane.
Recomendado
Networking Equipment Port Protection
Routers, switches, and Ethernet-facing equipment experience both cable-discharge ESD and surge coupled onto long network cabling. The PESD5V0S2BT protects two exposed lines per package with a 14V clamp and 12A (8/20 us) surge capability, complementing magnetics-based isolation on ports that remain vulnerable at the connector side. Its low capacitance preserves line signal integrity at 10/100 Ethernet speeds on auxiliary and management ports. Because the SOT23 footprint is industry-standard, the same layout accommodates the ultra-low-capacitance PESD5V0U2BT for gigabit-class lines without re-spinning the PCB. Deploy the device on every user-accessible RJ45 auxiliary line and DC input sense line to meet system-level immunity requirements.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PESD5V0S2BT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PESD5V0S2BT-Q | PESD5V0S2BT-QR | PESD5V0U2BT | PESD5V0S2BT (onsemi) |
|---|---|---|---|---|---|
| Package | SOT23 (TO-236AB) | SOT23 (TO-236AB) - same | SOT23 (TO-236AB) - same | SOT23 (TO-236AB) - same | SOT23 (TO-236AB) - same |
| Brand | Nexperia | Nexperia | Nexperia | Nexperia | onsemi |
| Reverse Standoff Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Capacitance Class | Low capacitance | Low capacitance | Low capacitance | Ultra-low capacitance | Low capacitance |
| Configuration | Bidirectional double (2 lines) | Bidirectional double (2 lines) | Bidirectional double (2 lines) | Bidirectional double (2 lines) | Bidirectional double (2 lines) |
Principais diferenciais
- Standard-grade cost advantage for consumer designs (vs PESD5V0S2BT-Q)
- Higher surge robustness for noisy environments (vs PESD5V0U2BT)
- Second-source availability (vs PESD5V0S2BT (onsemi))
Notas de projeto
Place the PESD5V0S2BT as close as physically possible to the connector or port entry point. Every millimeter of trace between the connector and the diode adds inductance that lets the clamped voltage overshoot before the diode conducts. Route the diode ground pin directly to a low-impedance ground plane with a short, wide via or ground stub - do not share a long ground trace with other circuitry, since surge current in the shared trace causes ground bounce on sensitive nodes.
Estimate the capacitance budget before committing to the PESD5V0S2BT on high-speed lines. The diode capacitance appears in parallel with the data line and, together with trace capacitance, forms a low-pass filter with the driver impedance. The exact capacitance value must come from the official Nexperia datasheet (not stated in the data available on this page). If the line exceeds roughly 100 Mbps and the capacitance budget is tight, select the ultra-low capacitance PESD5V0U2BT, which shares the identical SOT23 footprint so the change is a BOM edit only.
Do not exceed the 5V reverse standoff voltage on the protected line during normal operation, or the diode will begin to conduct and dissipate continuous power. On CAN and RS-485 buses, verify that common-mode voltage excursions including fault conditions stay below the standoff level. When substituting a cross-brand equivalent (such as the onsemi PESD5V0S2BT), re-check clamping voltage curves and capacitance from that manufacturer's datasheet rather than assuming the Nexperia numbers apply - parameters at identical part numbers can differ between vendors.
Informações de conformidade
RoHS-compliant packaging per Mouser listing and the compliant Nexperia ordering code PESD5V0S2BT,215. Automotive qualification applies to the PESD5V0S2BT-Q variant only. REACH, halogen-free, and conflict-minerals status should be confirmed from Nexperia's official compliance documentation.
