BZX84C20 Equivalent & Substitute Parts

Part Overview

The BZX84C20 is an active-status zener diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the SOT-23 package. This component provides 20 V nominal zener voltage with 300 mW maximum power dissipation and ±6% tolerance. The part is RoHS3 compliant and REACH unaffected, making it suitable for modern electronic applications requiring voltage regulation and protection circuits.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. Alternative sources and packaging configurations may be required due to inventory availability, lead time considerations, or specific application requirements.

Substiute Parts

BZX84C20

Taiwan Semiconductor CorporationIn Stock: 53205BZX84C20 Datasheet

Current PartRFQ

BZX84C20 RFG

Taiwan Semiconductor CorporationIn Stock: 6947BZX84C20 RFG Datasheet

Parametric EquivalentRFQ

BZX84B20Q-7-F

Diodes IncorporatedIn Stock: 29416BZX84B20Q-7-F Datasheet

Parametric EquivalentRFQ

BZX84C20Q-13-F

Diodes IncorporatedIn Stock: 1023BZX84C20Q-13-F Datasheet

Parametric EquivalentRFQ

BZX84C20Q-7-F

Diodes IncorporatedIn Stock: 1130BZX84C20Q-7-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of zener diodes within this product category is determined by equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage (Vz) must match at 20 V nominal
• Maximum power dissipation must equal or exceed 300 mW
• Impedance (Zzt) maximum of 55 Ohms
• Reverse leakage current at specified voltage (100 nA @ 14 V)
• Forward voltage characteristics (900 mV @ 10 mA maximum)
• Operating temperature range (-65°C to 150°C)

Mechanical Equivalence Criteria:

• Surface mount mounting type
• SOT-23 package configuration (TO-236-3, SC-59, SOT-23-3 designations)

Compliance Equivalence Criteria:

• RoHS3 compliance status
• REACH unaffected status

Tolerance variations (±6%, ±5%, ±2%) do not disqualify substitution when all other parameters remain equivalent. Packaging format differences (bulk versus tape & reel) represent logistical variations only and do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical equivalence to the BZX84C20 across the critical parameter set. Selection among these alternatives is based on the following factors:

BZX84C20 RFG (Taiwan Semiconductor Corporation): Maintains identical manufacturer sourcing with improved tolerance specification (±5% versus ±6%). Available in tape & reel packaging format. Suitable for applications requiring consistent voltage regulation with reduced tolerance drift.

BZX84B20Q-7-F (Diodes Incorporated): Offers tighter tolerance specification (±2%) with automotive-grade qualification and AEC-Q101 certification. Appropriate for automotive and mission-critical applications requiring enhanced reliability and tighter voltage control.

BZX84C20Q-13-F (Diodes Incorporated): Maintains standard tolerance (±6%) with automotive-grade qualification and AEC-Q101 certification. Provides automotive-qualified alternative with standard tolerance performance.

BZX84C20Q-7-F (Diodes Incorporated): Maintains standard tolerance (±6%) with automotive-grade qualification and AEC-Q101 certification. Provides automotive-qualified alternative with standard tolerance performance.

All substitute parts are active-status components with RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can BZX84C20Q-7-F replace BZX84C20 in existing designs?

A: Yes. The BZX84C20Q-7-F maintains identical electrical parameters (20 V zener voltage, 300 mW power, 55 Ohms impedance) and mechanical compatibility (SOT-23 surface mount package). The primary difference is the automotive-grade qualification and AEC-Q101 certification, which provides additional reliability assurance without affecting circuit performance.

Q: What is the difference between tape & reel and bulk packaging?

A: Tape & reel packaging is a continuous strip format suitable for automated assembly processes, while bulk packaging consists of individual components. Both formats contain electrically and mechanically identical parts. Selection depends on manufacturing process requirements and volume considerations.

Q: Does tolerance variation affect substitution compatibility?

A: Tolerance variations (±6%, ±5%, ±2%) do not disqualify substitution when all other electrical and mechanical parameters remain equivalent. Tighter tolerance specifications (such as ±2% in BZX84B20Q-7-F) provide improved voltage regulation accuracy but do not prevent interchangeability with standard tolerance parts (±6%).

Q: Are automotive-qualified parts (AEC-Q101) interchangeable with standard parts?

A: Yes. Automotive-qualified parts such as BZX84B20Q-7-F and BZX84C20Q-7-F maintain full electrical and mechanical equivalence to standard parts. Automotive qualification represents an additional reliability certification and does not restrict use in non-automotive applications.

Q: What is the significance of the SOT-23 package designation?

A: SOT-23 (also designated TO-236-3 or SC-59) is the surface mount package configuration for this zener diode family. All listed substitute parts use identical package geometry, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Can BZX84C20 RFG be used as a direct replacement for BZX84C20?

A: Yes. BZX84C20 RFG is a direct electrical and mechanical equivalent with improved tolerance specification (±5% versus ±6%). The primary difference is packaging format (tape & reel versus bulk) and manufacturer sourcing (same manufacturer, Taiwan Semiconductor Corporation).