PLZ18C-G3/H Equivalent & Substitute Zener Diodes Reference

Part Overview

The PLZ18C-G3/H is an active Zener Diode manufactured by Vishay General Semiconductor - Diodes Division, listed under the category Diodes, Zener. It features an 18 V nominal Zener voltage, 500 mW power rating, ±3% voltage tolerance, and a maximum impedance of 23 Ohms. The device is supplied in a DO-219AC (microSMF) surface mount package. It is suitable for various voltage regulation and protection applications. Finding alternative Zener diode models with identical or equivalent parameters is critical to ensuring technical interchangeability and sustaining product supply in manufacturing or repair scenarios.

Key Parameters

Parameter	PLZ18C-G3/H
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	18 V
Tolerance	±3%
Power - Max	500 mW
Impedance (Max) (Zzt)	23 Ohms
Current - Reverse Leakage @ Vr	200 nA @ 13 V
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 mA
Operating Temperature	150°C
Mounting Type	Surface Mount
Package / Case	DO-219AC
Supplier Device Package	DO-219AC (microSMF)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution is based strictly on identical or matching parametric attributes: zener voltage (18 V), voltage tolerance (±3%), maximum power (500 mW), maximum impedance (23 Ohms), reverse leakage current (200 nA @ 13 V), package type (DO-219AC), mounting type (surface mount), and compliance/certification status (ROHS3, REACH unaffected, MSL 1). Substitute part numbers are listed that match all these critical parameters to ensure functional compatibility and mechanical fit.

Parameter Comparison

Parameter	PLZ18C-G3/H	PLZ18B-G3/H
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	18 V	18 V
Tolerance	±3%	±3%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	23 Ohms	23 Ohms
Current - Reverse Leakage @ Vr	200 nA @ 13 V	200 nA @ 13 V
Voltage - Forward (Vf) (Max) @ If	800 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	150°C	150°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-219AC	DO-219AC
Supplier Device Package	DO-219AC (microSMF)	DO-219AC (microSMF)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The PLZ18C-G3/H and PLZ18B-G3/H Zener diodes are both listed as active products, with both being ROHS3 compliant, REACH unaffected, and MSL 1 (unlimited). These compliance and product status parameters indicate suitability for use in new designs or as replacements in existing surface mount assemblies, given matching technical and packaging specifications.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters when selecting a substitute for PLZ18C-G3/H?
A: Key parameters include Zener voltage (18 V), tolerance (±3%), maximum power (500 mW), maximum impedance (23 Ohms), reverse leakage current (200 nA @ 13 V), device package (DO-219AC), mounting type (surface mount), and compliance (ROHS3, REACH status, MSL).

Q: Are PLZ18C-G3/H and PLZ18B-G3/H Zener diodes interchangeable?
A: Both parts feature matching key parameters necessary for direct substitution, including Zener voltage, power rating, package type, and compliance certifications.

Q: Is there any difference in packaging or mounting method between PLZ18C-G3/H and PLZ18B-G3/H?
A: Both diodes utilize the DO-219AC (microSMF) surface mount package, ensuring physical and mechanical compatibility.

Q: Do both parts meet the same environmental compliance standards?
A: Yes, both PLZ18C-G3/H and PLZ18B-G3/H are ROHS3 compliant, REACH unaffected, and MSL 1 rated.

Q: Is the forward voltage (Vf) identical between the two diodes?
A: PLZ18C-G3/H is rated at 800 mV @ 10 mA and PLZ18B-G3/H at 900 mV @ 10 mA. This parameter should be verified for compatibility in circuit applications where forward voltage is critical.

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