Independent public references

Follow the source.

Standards references, public manufacturer information and official CAD resources support this library. Original explanations and illustrations are kept distinct from publisher material.

A public download is not automatically licensed for redistribution. Manufacturer graphics, CAD files and standards content remain at their original sources; original artwork has its own clearly stated scope and licence.

Read the sourcing and illustration policy
Autodesk

Autodesk IEC-60617 preview: Ultrasonic switch forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Touch-switch forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Solenoid actuator and feedback forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Single and duplex power-receptacle forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Generic device boundary forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Reference-only wire arrows

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Electroacoustic annunciation forms

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: One-line connector representation

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: One-line terminal representation

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: One-line cable-marker representation

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: One-line bus-tap representation

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Autodesk IEC-60617 preview: Connector forms that change wire numbers

Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Autodesk

Wire connection dots, crossing gaps and loops

Public drafting-tool documentation. The annotation is a connectivity or identification convention, not a verified IEC standard graphic.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

ABB

Transformer vector-group interpretation in protection application

Public manufacturer technical context distinguishes transformer winding types, clock numbers and measurement compensation. Used for interpretation, not to supply protection settings or a standard database graphic.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD4682 — analogue-to-digital conversion

Public component description and documentation for analogue-to-digital conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

TLV3201 — voltage comparison

Public device-function and terminal documentation used as an example of voltage comparison. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD8418 — shunt-current sensing

Public component description and documentation for shunt-current sensing. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD5686R — digital-to-analogue conversion

Public component description and documentation for digital-to-analogue conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD8276 — difference amplification

Public component description and documentation for difference amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD620 — instrumentation amplification

Public component description and documentation for instrumentation amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD633 — analogue multiplication

Public component description and documentation for analogue multiplication. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

ADA4522-1 — operational amplification

Public component description and documentation for operational amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

University tutorials: amplifier configurations and signal processing

Public tutorial index including inverting amplifier, rectification and related analogue function references. Detailed product design must use the underlying selected circuit documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD8436 — RMS-to-DC conversion

Public component description and documentation for rms-to-dc conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AN-1515: sample-and-hold function using an analogue switch

Public application note establishing the sample-and-hold acquisition function. No complete manufacturer example circuit or component values are reproduced.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

ADR4525 — series voltage reference

Public component description and documentation for series voltage reference. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

ADA4530-1 — electrometer and current-to-voltage acquisition

Public component description and documentation for electrometer and current-to-voltage acquisition. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

AD650 — voltage/frequency conversion

Public component description and documentation for voltage/frequency conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

STMicroelectronics

TIP120/TIP125 complementary Darlington transistor documentation

Public manufacturer explanation and diagrams of NPN and PNP compound Darlington devices. Educational geometry is independently drawn; package drawings are not rehosted.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Microchip Technology

DN2540 depletion-mode MOSFET documentation

Public depletion-mode MOSFET product documentation. Used to distinguish normally-on depletion operation from enhancement devices, without carrying product settings or package dimensions.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

ISO7741 — capacitive digital isolation

Public device-function and terminal documentation used as an example of capacitive digital isolation. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

TPS2663 — integrated electronic-fuse power protection

Public device-function and terminal documentation used as an example of integrated electronic-fuse power protection. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

UCC27714 — high-side and low-side gate drive with bootstrap context

Public device-function and terminal documentation used as an example of high-side and low-side gate drive with bootstrap context. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Hitachi Energy

Integrated gate-commutated thyristor devices

Public high-power switching device and integrated gate-unit reference. Used as advanced converter context; no product drawings or gate-unit design files are copied.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Analog Devices

LTC4215 — hot-swap power-path control

Public component description and documentation for hot-swap power-path control. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

LM74700-Q1 — ideal-diode controller

Public device-function and terminal documentation used as an example of ideal-diode controller. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Infineon Technologies

GaN HEMT structure and operating-mode overview

Public primary explanation of enhancement-mode versus normally-on HEMT behaviour. No claim that a generic MOSFET glyph establishes GaN material or gate limits.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Infineon Technologies

IGBT device families

Public insulated-gate bipolar transistor family documentation. Ratings, antiparallel diode configuration and gate-drive requirements remain device-specific.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Infineon Technologies

Bidirectional three-/single-phase AC/DC PFC and inverter application note

Public application context for actively switched AC/DC and inverter stages. Independent miniature topology illustrations have no copied product-specific values, wiring layouts or control implementation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Infineon Technologies

Power semiconductor module families

Public module descriptions and topology documentation, including switching-leg and bridge arrangements. No packaged-module terminal map, dimensioned outline or thermal rating is reproduced.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Infineon Technologies

Multilevel NPC converter application context

Public explanation of two-level and neutral-point-clamped converter contexts. The catalogue indicates a split-link/clamping concept; it is not an exact standard circuit or a selected module internal diagram.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

UCC21750 — isolated gate-driver interfaces

Public device-function and terminal documentation used as an example of isolated gate-driver interfaces. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

onsemi

J111/J112 JFET chopper transistor documentation

Public N-channel JFET example and terminal-reference documentation. The generic concept is not a recommendation to use a particular product or historical part.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

InterFET

JFET master table with explicit P-channel device classification

Public primary manufacturer table identifying P-channel and N-channel device families. Referenced for device-type evidence; table values and package geometry are not reproduced.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Texas Instruments

UCC27524 — low-side gate-drive interfaces

Public device-function and terminal documentation used as an example of low-side gate-drive interfaces. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Nexperia

Diode families and public diode documentation

Public diode family descriptions including Schottky devices. Only component concepts and links are used; manufacturer illustrations remain on the publisher site.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Nexperia

MOSFET families and application documentation

Public MOSFET device and application information, including intrinsic body-diode context. The generic artwork does not establish an accessible bulk terminal or a selected package pinout.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed

Nexperia

BC847 NPN transistor documentation

Public NPN transistor terminal and component reference. The catalogue supplies no manufacturer package pinout or product-rating substitute.

Public reference checked 14 October 2026 · Publisher material linked, not redistributed