1N4480 Equivalent & Substitute Parts Reference

Part Overview

The 1N4480 from Microchip Technology is a Zener diode designed for voltage regulation applications, featuring a nominal Zener voltage of 43 V, a power rating of 1.5 W, and ±5% tolerance in a DO-204AL (DO-41, Axial) package. It is currently active status and available in bulk packaging. Finding alternative models is necessary when considering supply chain continuity, inventory management, product lifecycle concerns, or requirements for RoHS/environmental compliance.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Product Status	RoHS Status	REACH Status	ECCN	HTSUS
1N4480	Microchip Technology	Diodes, Zener	43 V	±5%	1.5 W	40 Ohms	50 nA @ 34.4 V	-65°C ~ 175°C (TJ)	Through Hole	DO-204AL, DO041, Axial	DO-41	Active	RoHS non-compliant	REACH Unaffected	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitution for the 1N4480 Zener diode is determined strictly according to the following parameters: Zener voltage (43 V), tolerance (±5%), package/case (DO-204AL, DO-41, Axial), mounting type (Through Hole), and product status (Active). Secondary parameters included in the comparison are maximum power rating, impedance, current reverse leakage, operating temperature range, RoHS/REACH status, ECCN, and HTSUS codes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Product Status	ECCN	HTSUS
1N4480	Microchip Technology	Diodes, Zener	43 V	±5%	1.5 W	40 Ohms	50 nA @ 34.4 V	-65°C ~ 175°C (TJ)	Through Hole	DO-204AL, DO041, Axial	DO-41	Active	EAR99	8541.10.0050
1N4755A-T50A	Fairchild Semiconductor	Diodes, Zener	43 V	±5%	1 W	70 Ohms	5 µA @ 32.7 V	-65°C ~ 200°C	Through Hole	DO-204AL, DO-41, Axial	DO-41	Active	EAR99	8541.10.0050

Engineering Selection Recommendations

Both the Microchip Technology 1N4480 and Fairchild Semiconductor 1N4755A-T50A are listed as active and share similarities in package, mounting type, nominal Zener voltage, and tolerance. The 1N4480 is RoHS non-compliant, whereas no RoHS status is specified for the substitute part. Both parts are REACH Unaffected and classified under ECCN EAR99 and HTSUS 8541.10.0050.

Frequently Asked Questions (FAQ)

Q1: What parameters are critical for selecting a substitute for the 1N4480 Zener diode?
A1: The critical parameters are nominal Zener voltage (43 V), tolerance (±5%), power rating, impedance, reverse leakage current, package/case type, and mounting type.

Q2: Can the 1N4755A-T50A be installed in the same PCB footprint as the 1N4480?
A2: Both devices use the DO-204AL, DO-41, Axial package and Through Hole mounting, allowing compatibility with the same PCB footprint.

Q3: Are there differences in environmental or compliance certifications between the two parts?
A3: The 1N4480 is RoHS non-compliant and REACH unaffected. The 1N4755A-T50A does not list a RoHS status in the provided input, but both are REACH unaffected.

Q4: Do the electrical characteristics differ significantly between the two Zener diodes?
A4: The 1N4480 has a power rating of 1.5 W and a maximum impedance of 40 Ohms, while the 1N4755A-T50A has a 1 W power rating and a 70 Ohms maximum impedance. Reverse leakage current and operating temperature ranges also differ.

Q5: Is both the 1N4480 and its substitute part 1N4755A-T50A still currently active?
A5: Yes, both components are listed as active.

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