Equivalent & Substitute Parts for 1N4620-1 Zener Diode

Part Overview

The 1N4620-1 from Microchip Technology is a Zener diode with a nominal Zener voltage of 3.3 V and a maximum power dissipation of 500 mW in a DO-7 (DO-204AA) axial package. It is an active device designed for through-hole mounting, suitable for voltage regulation and protection applications. Finding suitable substitute Zener diodes is essential when inventory constraints, mechanical compatibility, or compliance requirements arise.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Packaging	Description	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Product Status	RoHS Status	ECCN	HTSUS
1N4620-1	Microchip Technology	Diodes, Zener	Bulk	DIODE ZENER 3.3V 500MW DO7	3.3 V	±5%	500 mW	1650 Ohms	3.5 µA @ 1.5 V	1.1 V @ 200 mA	-65°C ~ 175°C	Through Hole	DO-204AA, DO-7, Axial	DO-7	Active	RoHS non-compliant	EAR99	8541.10.0050
1N5226BTR	Fairchild Semiconductor	Diodes, Zener	-	ZENER DIODE, 3.3V, 5%, 0.5W, UNI	3.3 V	±5%	500 mW	28 Ohms	25 µA @ 1 V	1.2 V @ 200 mA	-65°C ~ 200°C	Through Hole	DO-204AH, DO-35, Axial	DO-35 (DO-204AH)	Active	-	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts in the Diodes, Zener category are determined by matching both key electrical and mechanical parameters. Substitution logic is based strictly on the following allowed parameters:

Zener voltage (Vz)
Tolerance
Maximum power dissipation (Power - Max)
Mounting type
Package / case type
Product status
Regulatory/ECCN/HTSUS compliance

All substitute parts listed have equivalent Zener voltage, power, and tolerance, and are suitable for through-hole assembly in axial packages.

Parameter Comparison

Manufacturer Part Number	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Mounting Type	Package / Case	Supplier Device Package	Product Status
1N4620-1	3.3 V	±5%	500 mW	Through Hole	DO-204AA, DO-7, Axial	DO-7	Active
1N5226BTR	3.3 V	±5%	500 mW	Through Hole	DO-204AH, DO-35, Axial	DO-35 (DO-204AH)	Active

Engineering Selection Recommendations

Both 1N4620-1 and 1N5226BTR are listed as active products with matching Zener voltage, tolerance, power rating, and through-hole mounting in axial cases. The 1N4620-1 is RoHS non-compliant, whereas the substitute’s compliance status is not specified in the provided parameters. For applications requiring strict compliance, compare regulatory documentation. Both parts have ECCN EAR99 and the same HTSUS code.

Frequently Asked Questions (FAQ)

Q1: What electrical parameters must match for Zener diode substitution?
A1: Zener voltage, tolerance, and power dissipation are the primary electrical parameters required for direct substitution.

Q2: How important is mechanical package compatibility?
A2: Substitute diodes must have the same mounting type and a compatible axial package to ensure proper fit in existing board layouts.

Q3: Does product status affect substitutability?
A3: Only active products are considered valid substitutes to ensure ongoing availability and manufacturer support.

Q4: Are compliance and certifications a factor in substitution?
A4: ECCN and HTSUS compliance are matched. RoHS/REACH status should be checked if required for the specific application.

Q5: Can a DO-35 package replace a DO-7 package directly?
A5: Both are axial through-hole types. Check board layout and mechanical fit based on precise package dimensions as specified in part datasheets.

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