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Vishay Semiconductor Opto Division TLLK4401

LED RED DIFFUSED T-1 T/H

Answer first: this page is a purchasing reference for the exact part number TLLK4401 from Vishay Semiconductor Opto Division. Use it to start datasheet, package, manufacturer and RFQ verification; do not treat page text as a live stock, price or lead-time promise.

Manufacturer: Vishay Semiconductor Opto Division Part number: TLLK4401 Package: Radial RFQ verification required

Key Parameters

Part NumberTLLK4401
ManufacturerVishay Semiconductor Opto Division
CategoryLED Indication - Discrete
packageRadial
series-
packagingBulk
product statusActive
param 1Red
param 2Standard
param 3-
param 4Diffused
param 517mcd
param 6Round with Domed Top
param 73mm, T-1
param 81.8V
param 92mA
param 1060°
param 11Through Hole
param 12630nm
param 13643nm
param 14-
param 15-
param 16-
param 17T-1
param 18-
param 196.10mm

Parameters are provided for purchasing review. Confirm package, suffix, lifecycle status, datasheet revision and approved substitutes before ordering.

How to Verify TLLK4401 Before Ordering

Datasheet and parameter checks

  • Confirm the full manufacturer part number, not only a shortened search keyword.
  • Compare package, pinout, dimensions, voltage or rating fields, temperature range and compliance wording against the released BOM.
  • Use the manufacturer datasheet or drawing for electrical and mechanical limits before approving a substitute.

RFQ fields SENICO needs

  • Send exact part number, manufacturer, quantity, target delivery date, destination and required packaging.
  • State whether alternates are allowed, and list any date-code, certificate, traceability or customer AVL requirement.
  • Keep exact stock, factory lead time and proposed alternatives in separate quote lanes.

For TLLK4401, SENICO recommends checking manufacturer marking, package, date code, requested quantity, approved vendor requirements and replacement risk before issuing a purchase order. If a supplier suggests an equivalent, record the changed fields and approval owner before comparing price.

We do not treat displayed data as a real-time stock or price commitment. The RFQ reply is the verified commercial reference.

Related buying guides: stock and lead-time verification, equivalent IC comparison, and BOM RFQ preparation.