Equivalent & Substitute Parts for 1N764 Zener Diode

Part Overview

The 1N764 by Microchip Technology is a Zener diode specified for 10 V nominal Zener voltage and a maximum power dissipation of 250 mW in a DO-35 (DO-204AH) axial package. It is RoHS non-compliant and currently has active product status, with existing inventory levels stated. In applications where electrical, compliance, or package requirements change, or where inventory or sourcing issues arise, it is essential to identify strictly equivalent or qualified substitute Zener diodes.

Key Parameters

Parameter	1N764
Manufacturer	Microchip Technology
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	10 V
Power - Max	250 mW
Impedance (Max) (Zzt)	12 Ohms
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Supplier Device Package	DO-35 (DO-204AH)
RoHS Status	RoHS non-compliant
Product Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution is strictly determined by the following parameters: Zener voltage (10 V nominal), through-hole mounting, axial form factor (DO-35/DO-204AH or compatible), comparable or higher power dissipation, and similar or improved impedance. Product status, RoHS and REACH compliance, and MSL are specified for regulatory and sourcing considerations. Substitute parts listed conform to these restrictions.

Parameter Comparison

Parameter	1N764	BZX79-B10,133	ZPY10-TAP
Manufacturer	Microchip Technology	Nexperia USA Inc.	Vishay General Semiconductor - Diodes Division
Category	Diodes, Zener	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	10 V	10 V	10 V
Power - Max	250 mW	400 mW	1.3 W
Impedance (Max) (Zzt)	12 Ohms	20 Ohms	2 Ohms
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AL, DO-41, Axial
Supplier Device Package	DO-35 (DO-204AH)	ALF2	DO-204AL (DO-41)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All substitute parts have an active product status and are available in through-hole axial packages, matching the mounting and form factor required for direct replacement. Substitute options BZX79-B10,133 and ZPY10-TAP offer RoHS compliance and REACH unaffected status. Variations in maximum power dissipation, package style, and RoHS compliance should be verified for mechanical and regulatory fit based on project requirements.

Frequently Asked Questions (FAQ)

Q: What key parameters determine if a Zener diode is an exact substitute for 1N764?
A: Substitution is determined by nominal Zener voltage, power dissipation rating, maximum impedance, mounting type, package/case specification, and compliance status.

Q: Are BZX79-B10,133 and ZPY10-TAP direct drop-in replacements?
A: BZX79-B10,133 matches the Zener voltage and through-hole DO-35 (DO-204AH) form factor. ZPY10-TAP provides the same Zener voltage in a through-hole DO-41 (DO-204AL) package; verify package physical compatibility with existing PCB layouts.

Q: How does RoHS or REACH status impact substitute selection?
A: RoHS and REACH statuses determine environmental and regulatory acceptance in specific applications; substitutes BZX79-B10,133 and ZPY10-TAP are both ROHS3 Compliant and REACH Unaffected.

Q: What about differences in power ratings or impedance values?
A: Substitute diodes provide power dissipation equal to or greater than the original; maximum impedance varies but is within practical operating limits for the Zener voltage specified.

Q: Are substitute packages dimensionally compatible?
A: BZX79-B10,133 uses a compatible DO-35 (DO-204AH) package. ZPY10-TAP uses a DO-41 (DO-204AL) package; mechanical fit needs verification against the target PCB if space is constrained.

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