{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPD4E001DCKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPD4E001DCKR","canonicalUrl":"https://icboms.com/texas-instruments/TPD4E001DCKR","factsUrl":"https://icboms.com/api/mcp/products/TPD4E001DCKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPD4E001DCKR, Steering (Rail to Rail) ESD protection array, 4 unidirectional channels, 100W peak pulse power, 5.5V reverse standoff, SC-70-6 package, -40°C to 85°C.","salesMarkdown":"## What this rail-clamp array does that a plain TVS diode can't The TPD4E001DCKR is a four-channel steering (rail-to-rail) ESD protection array from Texas Instruments. Instead of a single zener or TVS diode per line, it uses steering diodes to shunt transients to the supply rails — the VCC and GND pins. That means the clamping voltage depends on the rail voltage you feed it, not just the breakdown of a standalone part. Each channel is unidirectional, rated for 100 W peak pulse power, with a reverse standoff of 5.5 V max. ## Ethernet port protection — where it earns its keep TI explicitly lists Ethernet as an application for this part. The four channels map neatly to the differential pairs in 10/100Base-T — two channels per pair, one for each wire. The steering architecture is a good fit because the signal swing on Ethernet (typically 2.5 V peak for 100Base-TX) sits well below the 5.5 V standoff, so the protection doesn't clip the signal in normal operation. The 100 W peak pulse rating is enough for IEC 61000-4-2 ESD strikes at the connector, but it's not a surge-rated device — don't expect it to survive lightning-coupled events without external series resistance or a higher-energy primary protector upstream. ## Four channels in a tiny SC-70 — layout reality The SC-70-6 (SOT-363) footprint is about 2.1 mm × 2.0 mm. Four I/O pins, one VCC, one GND. The routing trick is keeping the traces from the connector to the I/O pins as short and direct as possible — every millimeter of stub adds inductance that degrades clamping during a fast ESD event. The VCC pin should connect to the local rail with a 0.1 µF ceramic right at the pin; that cap provides the low-impedance sink for the steering diode to dump the transient into. Without it, the rail itself bounces and the protection effectiveness drops.","metaTitle":"TPD4E001DCKR Steering (Rail to Rail) ESD Protection, 4-Ch","metaDescription":"Texas Instruments TPD4E001DCKR 4-channel unidirectional steering ESD array, 100W peak pulse power, 5.5V reverse standoff, SC-70-6 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Texas Instruments","Type":"Steering (Rail to Rail)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Ethernet","Mounting Type":"Surface Mount","Package / Case":"6-TSSOP, SC-88, SOT-363","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"100W","Base Product Number":"TPD4E001","Operating Temperature":"-40°C~85°C(TA)","Power Line Protection":"Yes","Capacitance @ Frequency":"-","Supplier Device Package":"SC-70-6","Unidirectional Channels":"4","Voltage - Breakdown (Min)":"11V","Voltage - Clamping (Max) @ Ipp":"-","Voltage - Reverse Standoff (Typ)":"5.5V (Max)","Current - Peak Pulse (10/1000µs)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Can TPD4E001DCKR protect Ethernet lines?","answer":"Yes. Texas Instruments lists Ethernet as an intended application. The four unidirectional channels cover the two differential pairs of 10/100Base-T. The 5.5 V reverse standoff is well above the typical 2.5 V signal swing, so signal integrity is preserved. The 100 W peak pulse rating handles ESD strikes at the connector, but it is not rated for surge or lightning events without additional protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPD4E001DCKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPD4E001DCKR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}