1N828 Equivalent & Substitute Parts Reference

Part Overview

The 1N828 from Microchip Technology is a Zener diode rated for 6.2 V nominal Zener voltage, 500 mW maximum power dissipation, and ±5% tolerance, supplied in a DO-35 axial through-hole package. It features a maximum impedance (Zzt) of 15 Ohms and operates within a temperature range of -55°C to 175°C. The device is RoHS non-compliant, has unlimited moisture sensitivity level, and is currently active in production. Identifying substitute and equivalent parts is necessary to address supply limitations, support second-sourcing, and maintain availability for production continuity and compliance with environmental or qualification standards.

Key Parameters

Parameter	1N828 Value
Manufacturer	Microchip Technology
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	6.2 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max) (Zzt)	15 Ohms
Current - Reverse Leakage @ Vr	2 µA @ 3 V
Operating Temperature	-55°C ~ 175°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute and equivalent parts for the 1N828 are determined based on strict adherence to shared electrical and mechanical parameters, specifically: Zener voltage (6.2 V nominal), tolerance (±5%), maximum power dissipation (≥400 mW), maximum impedance (≤15 Ohms), reverse leakage current, operating temperature range, mounting type, and package compatibility (DO-35, Axial). Substitute parts provided are only those matching these criteria as specified in the input.

Parameter Comparison

Part Number	Manufacturer	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	RoHS Status	MSL	Special Qualification
1N828	Microchip Technology	6.2 V	±5%	500 mW	15 Ohms	2 µA @ 3 V	-55°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant	1 (Unlimited)	-
1N821A	Solid State Inc.	6.2 V	±5%	400 mW	15 Ohms	-	-55°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	ROHS3 Compliant	Not Applicable	-
1N821-1	Microchip Technology	6.2 V	±5%	500 mW	15 Ohms	2 µA @ 3 V	-55°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant	1 (Unlimited)	-
1N829	Microchip Technology	6.2 V	±5%	500 mW	15 Ohms	2 µA @ 3 V	-55°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant	1 (Unlimited)	-
JANTX1N827-1	Microchip Technology	6.2 V	±5%	500 mW	15 Ohms	2 µA @ 3 V	-55°C ~ 175°C	Through Hole	DO-204AH, DO-35, Axial	RoHS non-compliant	1 (Unlimited)	Military, MIL-PRF-19500/159
1N5234BTR	Fairchild Semiconductor	6.2 V	±5%	500 mW	7 Ohms	5 µA @ 4 V	-65°C ~ 200°C	Through Hole	DO-204AH, DO-35, Axial	-	-	-

Engineering Selection Recommendations

Selection among these substitute Zener diodes should consider product status (active), compliance with RoHS and environmental requirements, and any specified qualification standards (such as military qualification for JANTX1N827-1). Where environmental compliance is mandatory, choose parts with ROHS3 status. For military or high-reliability applications, select devices with explicit qualification such as MIL-PRF-19500/159. Ensure that the part status is active for continuity of supply.

Frequently Asked Questions (FAQ)

Q1. What parameters are required for Zener diode substitution in the 1N828 category?
A1. Substitution is based strictly on the following parameters: Zener voltage (6.2 V nom.), tolerance (±5%), maximum power (≥400 mW), impedance (≤15 Ohms), reverse leakage at specified voltage, operating temperature range, mounting type, and package (DO-35 axial).

Q2. Are all substitute parts compatible with the original 1N828 PCB footprint and mounting?
A2. All listed substitutes use the DO-204AH, DO-35, Axial package with through-hole mounting, ensuring mechanical compatibility with the 1N828.

Q3. Are there differences in environmental or compliance characteristics among substitutes?
A3. Some parts, such as 1N821A, are ROHS3 compliant, while others such as 1N828, 1N821-1, 1N829, and JANTX1N827-1 are RoHS non-compliant.

Q4. Which substitute has military or high-reliability qualification?
A4. JANTX1N827-1 includes military-grade qualification to MIL-PRF-19500/159.

Q5. What are key considerations when selecting between substitutes?
A5. Consider matching Zener voltage, tolerance, power, impedance, reverse leakage, and any necessary compliance or qualification requirements.

Q6. Are the electrical parameters, such as impedance and leakage current, consistent across all listed substitutes?
A6. All listed equivalents match the 1N828 impedance (15 Ohms max) except 1N5234BTR, which has 7 Ohms. Leakage current and operating temperature ranges vary as specified in the comparison table.

Q7. Can the 1N821A be used interchangeably with the 1N828?
A7. 1N821A matches voltage, tolerance, impedance, and package but has a lower maximum power rating (400 mW) and ROHS3 compliance. Refer to the comparison table for parameter alignment.

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