Equivalent & Substitute Parts Reference: 1N4471

Part Overview

The Microchip Technology 1N4471 is a Zener diode operating at a nominal Zener voltage of 18 V with a maximum power dissipation of 1.5 W and a tolerance of ±5%. The device is supplied in a DO-204AL (DO-41), axial through-hole package. Current part status is Active. Substitution of alternative models may be required due to inventory availability, compliance needs, or qualification of second-sourced parts within the same voltage and package category.

Substiute Parts

1N4471

Microchip TechnologyIn Stock: 7641N4471 Datasheet

Current PartRFQ

1N4746A

Microchip TechnologyIn Stock: 502781N4746A Datasheet

SimilarRFQ

1N4746ATR

onsemiIn Stock: 273761N4746ATR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for Zener diodes must match the nominal Zener voltage, tolerance, mounting type, package, and general electrical specifications including power dissipation rating, maximum impedance, and reverse leakage current. Mechanical compatibility (package, mounting type) is required for drop-in replacement. Only models with verified compliance information and active product status are listed. All parameters in the comparison table are strictly as provided.

Key substitution parameters:

• Voltage - Zener (Nom) (Vz)
• Tolerance
• Power - Max
• Impedance (Max) (Zzt)
• Current - Reverse Leakage @ Vr
• Operating Temperature
• Mounting Type
• Package / Case
• RoHS and REACH Status
• Product Status

Parameter Comparison

Engineering Selection Recommendations

All listed substitute components retain Active status. The 1N4471 and 1N4746A are RoHS non-compliant, while the 1N4746ATR from onsemi is ROHS3 Compliant. All alternatives are REACH Unaffected. Product selection shall be based on compliance requirements and consistent product status. Only the provided certifications and compliance statuses are considered.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for substituting the 1N4471 Zener diode?
A: Substitute parts must match voltage rating, tolerance, power dissipation rating, impedance, operating temperature, mounting type, and package as specified.

Q: Are all substitute Zener diodes in the same package type as 1N4471?
A: Yes. All substitutes are supplied in a DO-204AL (DO-41), axial through-hole package.

Q: How does RoHS compliance vary among the substitutes?
A: The 1N4471 and 1N4746A are RoHS non-compliant. The 1N4746ATR is ROHS3 Compliant.

Q: Can the substitute parts be used in the same operating temperature range?
A: All substitutes provided operate within at least the -65°C ~ 175°C range, with substitutes rated up to -65°C ~ 200°C.

Q: Are there differences in power dissipation or electrical specifications?
A: The 1N4471 is rated at 1.5 W, while substitutes are rated at 1 W. Electrical impedance and reverse leakage parameters differ as shown in the comparison table. Compatibility depends strictly on matching specified key parameters.

Q: Should mounting method or case type be verified for substitute selection?
A: All parts specified use the same through-hole mounting and DO-204AL (DO-41), axial package, fulfilling mechanical compatibility requirements.