BZX84C20T-7-F Equivalent & Substitute Parts

Part Overview

The BZX84C20T-7-F is a 20 V Zener diode manufactured by Diodes Incorporated, rated for 150 mW power dissipation in a surface mount SOT-523 package. This component is classified as Active and is RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits where precise voltage clamping is required. Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while accommodating different package configurations or enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	20	V
Tolerance	±6%	%
Power - Maximum	150	mW
Impedance (Maximum)	55	Ohms
Current - Reverse Leakage @ 14 V	100	nA
Voltage - Forward (Maximum) @ 10 mA	900	mV
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-523	—

Substitute Part Grouping Explanation

Substitution of the BZX84C20T-7-F is determined by the following critical parameters: nominal Zener voltage of 20 V, impedance maximum of 55 Ohms, operating temperature range of -65°C to 150°C, and surface mount mounting type. Substitute parts must maintain the 20 V Zener voltage specification and equivalent impedance characteristics. The tolerance specification (±6% for the main part) and power rating (150 mW for the main part) establish the baseline performance envelope. Substitute parts identified in this reference maintain these core electrical characteristics while offering alternative package configurations (TO-236AB versus SOT-523) and in some cases enhanced power ratings (250 mW) or improved tolerance specifications (±1% or ±5%). All substitute parts listed are Active status components with RoHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility.

Parameter Comparison

Parameter	BZX84C20T-7-F (Main)	BZX84-A20,215	BZX84-C20,215	BZX84-C20,235
Manufacturer	Diodes Incorporated	NXP Semiconductors	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nominal)	20 V	20 V	20 V	20 V
Tolerance	±6%	±1%	±5%	±5%
Power - Maximum	150 mW	250 mW	250 mW	250 mW
Impedance (Maximum)	55 Ohms	55 Ohms	55 Ohms	55 Ohms
Current - Reverse Leakage @ 14 V	100 nA	50 nA	50 nA	50 nA
Voltage - Forward (Maximum) @ 10 mA	900 mV	900 mV	900 mV	900 mV
Operating Temperature Range	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Package / Case	SOT-523	TO-236-3 (SC-59, SOT-23-3)	TO-236-3 (SC-59, SOT-23-3)	TO-236-3 (SC-59, SOT-23-3)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Grade	Standard	Automotive	Automotive	Automotive
Qualification	Not specified	AEC-Q101	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

All substitute parts listed maintain the core electrical specifications required for 20 V Zener diode functionality: nominal voltage, impedance, and operating temperature range. The BZX84-A20,215 (NXP Semiconductors) offers improved tolerance (±1% versus ±6%) and enhanced power rating (250 mW versus 150 mW) with Automotive grade qualification and AEC-Q101 certification. The BZX84-C20,215 and BZX84-C20,235 (both Nexperia USA Inc.) provide equivalent tolerance (±5%), enhanced power rating (250 mW), and Automotive grade with AEC-Q101 certification. All substitute parts are Active status with RoHS3 compliance and REACH Unaffected status. Package configuration differs between the main part (SOT-523) and all substitutes (TO-236AB / SOT-23-3), requiring PCB layout and footprint verification during implementation. Selection between substitutes depends on application requirements for tolerance precision, power dissipation margin, and automotive qualification necessity.

Frequently Asked Questions (FAQ)

Q: Can BZX84-A20,215 directly replace BZX84C20T-7-F in all applications?

A: Electrical substitution is valid based on matching 20 V nominal Zener voltage, 55 Ohm impedance, and -65°C to 150°C operating range. However, package configuration differs (TO-236AB versus SOT-523), requiring PCB footprint redesign. The BZX84-A20,215 offers superior tolerance (±1%) and higher power rating (250 mW), making it suitable for applications requiring enhanced performance margins.

Q: What is the difference between BZX84-C20,215 and BZX84-C20,235?

A: Both parts are electrically identical with 20 V nominal voltage, ±5% tolerance, 250 mW power rating, and TO-236AB package. The difference is in packaging configuration (tape reel designation), not electrical performance. Both are Automotive grade with AEC-Q101 qualification.

Q: Does package change from SOT-523 to TO-236AB affect circuit performance?

A: Package change does not affect electrical performance of the Zener diode function. Both are surface mount packages with equivalent thermal and electrical characteristics for this application. PCB layout and footprint must be updated to accommodate the different package geometry.

Q: Are all substitute parts RoHS3 compliant?

A: BZX84-C20,215 and BZX84-C20,235 are explicitly RoHS3 compliant. BZX84-A20,215 RoHS status is not specified in the provided data. Verify RoHS compliance status with the manufacturer if regulatory compliance is required.

Q: What does AEC-Q101 qualification indicate?

A: AEC-Q101 is an automotive qualification standard for discrete semiconductors. All substitute parts carry this qualification, indicating suitability for automotive applications with enhanced reliability and quality assurance requirements.

Q: Can the 150 mW main part be replaced with a 250 mW substitute in power-limited circuits?

A: Yes. The 250 mW substitute parts provide additional power dissipation margin without affecting voltage regulation performance. This is a conservative substitution that enhances thermal headroom in the application.

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