Equivalent & Substitute Parts for BZX84C30 Zener Diode

Part Overview

The BZX84C30, manufactured by Taiwan Semiconductor Corporation, is a surface mount Zener diode specified for 30 V nominal Zener voltage, 300 mW maximum power dissipation, and ±6.67% voltage tolerance. The part is supplied in a SOT-23 (TO-236-3, SC-59, SOT-23-3) package, and is designed for general-purpose regulation and voltage reference applications in compact electronic systems. The product status is active, with RoHS3 and REACH compliance confirmed. Identifying suitable alternative models is necessary for purposes of second-sourcing, supply chain risk mitigation, or inventory fulfillment where tightly matched electrical and mechanical parameters are mandatory.

Key Parameters

Manufacturer Part Number	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	RoHS Status	REACH Status
BZX84C30	30 V	±6.67%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3 Compliant	REACH Unaffected

Substitute Part Grouping Explanation

The following substitute Zener diode part numbers are grouped as parametric equivalents to BZX84C30 strictly by matching key electrical and mechanical parameters: nominal Zener voltage (30 V), maximum power dissipation (300 mW), maximum impedance (80 Ohms), reverse leakage current (100 nA @ 21 V), forward voltage (900 mV @ 10 mA), operating temperature range (-65°C to 150°C), mounting type (surface mount), and package (TO-236-3, SC-59, SOT-23-3 or SOT-23-3). All substitute parts are RoHS3 compliant and REACH unaffected.

Parameter Comparison

Manufacturer Part Number	Manufacturer	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	RoHS Status	REACH Status	Product Status
BZX84C30	Taiwan Semiconductor Corporation	30 V	±6.67%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3 Compliant	REACH Unaffected	Active
BZX84C30 RFG	Taiwan Semiconductor Corporation	30 V	±5%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23	ROHS3 Compliant	REACH Unaffected	Active
BZX84B30Q-7-F	Diodes Incorporated	30 V	±2%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	ROHS3 Compliant	REACH Unaffected	Active
BZX84C30Q-13-F	Diodes Incorporated	30 V	±6.67%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	ROHS3 Compliant	REACH Unaffected	Active
BZX84C30Q-7-F	Diodes Incorporated	30 V	±6.67%	300 mW	80 Ohms	100 nA @ 21 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	ROHS3 Compliant	REACH Unaffected	Active

Engineering Selection Recommendations

All listed substitute Zener diode part numbers for BZX84C30 have active product status, RoHS3 compliance, and REACH unaffected classification. Electrical and mechanical compatibility is achieved through matching parameters including voltage rating, power, tolerance, impedance, leakage current, forward voltage, operating temperature, mounting type, and package. Substitute selection can be made based on inventory availability, preferred manufacturer, and compliance requirements as explicitly listed.

Frequently Asked Questions (FAQ)

Q1: What are the critical substitution criteria for BZX84C30 Zener diode replacements?
A1: Substitution requires identical Zener voltage rating, maximum power dissipation, tolerance, impedance, reverse leakage current, forward voltage at specified current, operating temperature range, surface-mount configuration, and package/case type.

Q2: Are all substitute parts provided in a SOT-23 compatible package?
A2: All substitute parts are supplied in packages specified as TO-236-3, SC-59, SOT-23-3 or SOT-23-3, which are mechanically compatible with the SOT-23 footprint.

Q3: Do the alternative models have equivalent regulatory compliance status?
A3: All substitutes are RoHS3 compliant and REACH unaffected, consistent with the main BZX84C30 part.

Q4: How does voltage tolerance impact substitution for these models?
A4: Only the exact provided voltage tolerances are listed: ±6.67%, ±5%, and ±2%. The electrical and mechanical substitution is limited to these specified tolerances as per the data provided.

Q5: Can automotive-qualified substitutes be selected?
A5: BZX84B30Q-7-F, BZX84C30Q-13-F, and BZX84C30Q-7-F are listed as automotive-grade with AEC-Q101 qualification, as indicated in the supplied parameters. Selection can be made accordingly.

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