BZX84-A33,215 Equivalent & Substitute Parts

Part Overview

The BZX84-A33,215 is a 33 V Zener diode manufactured by Nexperia USA Inc., rated for 250 mW power dissipation in a surface mount TO-236AB package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and component availability across multiple manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	33	V
Tolerance	±1%	—
Power - Maximum	250	mW
Impedance (Maximum)	80	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 700 mV	—
Voltage - Forward (Maximum) @ If	900 mV @ 10 mA	—
Operating Temperature Range	-65 to 150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BZX84-A33,215 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 33 V nominal
Package compatibility: TO-236-3 / SOT-23-3 surface mount
Operating temperature range: -65°C to 150°C
Surface mount technology and pin configuration

Secondary Compatibility Factors:

Power dissipation rating (minimum 225 mW acceptable for most applications)
Impedance specification (maximum 80 Ohms)
Forward voltage characteristics (900 mV @ 10 mA)
RoHS3 compliance and MSL rating

The substitute parts listed below meet these criteria across multiple manufacturers, enabling cross-platform component selection while maintaining functional equivalence in standard voltage regulation and protection applications.

Parameter Comparison

Parameter	BZX84-A33,215 (Main)	BZX84C33-7-F	BZX84C33LT3G	MMBZ5257BLT1G
Manufacturer	Nexperia USA Inc.	Diodes Incorporated	onsemi	onsemi
Voltage - Zener (Nom)	33 V	33 V	33 V	33 V
Tolerance	±1%	±6%	±6%	±5%
Power - Max	250 mW	300 mW	225 mW	225 mW
Impedance (Max)	80 Ohms	80 Ohms	80 Ohms	58 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 700 mV	100 nA @ 23.1 V	50 nA @ 23.1 V	100 nA @ 25 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Package / Case	TO-236-3, SOT-23-3	TO-236-3, SOT-23-3	TO-236-3, SOT-23-3	TO-236-3, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed are Active product status components with ROHS3 compliance and MSL Level 1 rating, meeting the same environmental and regulatory requirements as the primary BZX84-A33,215 part.

BZX84C33-7-F (Diodes Incorporated): This substitute provides 300 mW maximum power rating, exceeding the primary part specification. Zener voltage tolerance is ±6% compared to ±1% on the main part. Impedance and forward voltage characteristics are identical. This part is suitable for applications where higher power dissipation margin is beneficial.

BZX84C33LT3G (onsemi): This substitute provides 225 mW maximum power rating, slightly below the primary part. Zener voltage tolerance is ±6%. Impedance and forward voltage characteristics match the primary specification. Reverse leakage current is 50 nA, matching the main part. This part is suitable for standard voltage regulation applications within the specified power envelope.

MMBZ5257BLT1G (onsemi): This substitute provides 225 mW maximum power rating with ±5% zener voltage tolerance. Impedance is 58 Ohms, lower than the primary part specification of 80 Ohms, providing improved voltage stability. Reverse leakage current is 100 nA. This part is suitable for applications requiring lower output impedance characteristics.

All substitute parts maintain the same operating temperature range, package configuration, and surface mount technology as the primary component.

Frequently Asked Questions (FAQ)

Q: Can BZX84C33-7-F replace BZX84-A33,215 in all applications?

A: BZX84C33-7-F is electrically compatible for voltage regulation and protection circuits. The primary differences are higher power rating (300 mW vs. 250 mW) and wider zener voltage tolerance (±6% vs. ±1%). Applications requiring tight voltage tolerance specifications should evaluate the ±6% tolerance against circuit requirements.

Q: What is the difference between BZX84C33LT3G and MMBZ5257BLT1G?

A: Both parts share 33 V zener voltage, 225 mW power rating, and identical forward voltage characteristics. MMBZ5257BLT1G has lower impedance (58 Ohms vs. 80 Ohms) and ±5% tolerance compared to ±6% on BZX84C33LT3G. MMBZ5257BLT1G provides superior voltage regulation performance due to lower output impedance.

Q: Are all substitute parts in the same package?

A: Yes. All parts use TO-236-3 / SOT-23-3 surface mount packages with identical pin configurations, enabling direct PCB footprint compatibility.

Q: Do substitute parts meet automotive qualification requirements?

A: The primary BZX84-A33,215 carries AEC-Q101 automotive qualification. Substitute parts are listed as Active status with ROHS3 compliance and MSL Level 1 rating. Automotive application requirements should be verified against specific qualification documentation for each substitute manufacturer.

Q: What is the impact of impedance differences on circuit performance?

A: Impedance affects voltage regulation quality and transient response. MMBZ5257BLT1G (58 Ohms) provides better voltage stability than parts rated at 80 Ohms. Applications with stringent voltage ripple or transient requirements should prioritize lower impedance specifications.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes. All substitute parts use identical TO-236-3 / SOT-23-3 surface mount packages with matching pin assignments, enabling direct replacement on existing printed circuit boards without layout modifications.

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