1N4474 Equivalent & Substitute Parts Reference

Part Overview

The 1N4474 is a Zener diode manufactured by Microchip Technology. It is designed for voltage regulation applications, providing a stable 24 V nominal Zener voltage at up to 1.5 W power dissipation. The part is offered in a DO-41 axial through-hole package and is currently listed as active. The necessity to identify substitute models arises due to requirements such as inventory constraints, compliance (RoHS/REACH status), or matching electrical and mechanical specifications in replacement or new designs.

Substiute Parts

1N4474

Microchip TechnologyIn Stock: 10211N4474 Datasheet

Current PartRFQ

1N4749A

Lumimax Optoelectronic TechnologyIn Stock: 372261N4749A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within Zener diodes is determined strictly by matching key electrical and mechanical parameters: Zener voltage (Vz), tolerance, maximum power dissipation, maximum impedance (Zzt), reverse leakage current, forward voltage at specified current, operating temperature range, mounting type, and package/case details. Only parts meeting these criteria and provided in the explicit input are considered as substitutes for the 1N4474.

Parameter Comparison

Engineering Selection Recommendations

Engineering selection may consider product status, RoHS compliance, and REACH status based solely on provided information. The main part 1N4474 is RoHS non-compliant while the substitute 1N4749A is RoHS compliant. Both parts are listed as active and REACH unaffected. Inventory levels for both parts are provided for immediate availability consideration.

Frequently Asked Questions (FAQ)

Q: What key parameters govern substitutability for Zener diodes in this category?
A: Zener voltage (Vz), tolerance, power rating, maximum impedance (Zzt), reverse leakage current, forward voltage at given current, operating temperature, mounting type, and package/case must strictly match the target application requirements.

Q: Are the mounting and packaging options equivalent between 1N4474 and 1N4749A?
A: Both parts are through-hole devices supplied in DO-41 style axial packages, suitable for direct mechanical substitution.

Q: How does compliance affect substitution choices for these diodes?
A: The 1N4749A substitute is RoHS compliant, while the 1N4474 is RoHS non-compliant. Product selection may depend on compliance requirements for the intended application.

Q: Is there a difference in product status between the main and substitute part?
A: Both 1N4474 and 1N4749A are active products, ensuring continued supply availability.

Q: What should be considered regarding operating temperature during substitution?
A: Both parts support wide operating temperature ranges; however, only the explicitly provided ranges are referenced for selection suitability.

Q: Does the supplier device package affect direct replacement compatibility?
A: The 1N4474 uses the DO-41 package, and the 1N4749A uses the DO-41G variant, both defined in the input as DO-204AL, axial, for equivalent mechanical fit.