BZT52C22-TP Equivalent & Substitute Parts

Part Overview

The BZT52C22-TP is a Zener diode manufactured by Micro Commercial Co, rated at 22 V nominal voltage with 200 mW maximum power dissipation in SOD-123 surface mount packaging. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Tolerance	±6%	—
Power - Max	200	mW
Impedance (Max)	55	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 15.4 V	—
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	—
Operating Temperature	-65°C ~ 150°C	—
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZT52C22-TP is determined by the following critical parameters: nominal Zener voltage (22 V), voltage tolerance (±6% or tighter), maximum power dissipation capability, package type (SOD-123 or compatible), operating temperature range, and regulatory compliance (ROHS3). Substitute parts are grouped into two categories:

Direct Substitutes (Electrical Equivalents): Parts with identical or superior power ratings (500 mW or higher) in SOD-123 packaging, maintaining 22 V nominal voltage and compatible tolerance specifications. These parts are pin-compatible and functionally interchangeable in applications where the original 200 mW rating is not a limiting constraint.

Similar Substitutes (Package or Power Variants): Parts with 22 V nominal voltage but differing in package type (SOD-323), power rating (200 mW to 500 mW), or tolerance specifications (±2% to ±5.68%). These require design verification for package footprint compatibility and thermal management considerations.

Parameter Comparison

Part Number	Manufacturer	Voltage - Zener (Nom)	Tolerance	Power - Max	Impedance (Max)	Package / Case	Operating Temperature	RoHS Status
BZT52C22-TP	Micro Commercial Co	22 V	±6%	200 mW	55 Ohms	SOD-123	-65°C ~ 150°C	ROHS3 Compliant
BZT52C22-13-F	Diodes Incorporated	22 V	±6%	500 mW	55 Ohms	SOD-123	-65°C ~ 150°C	ROHS3 Compliant
BZT52C22-7-F	Diodes Incorporated	22 V	±6%	500 mW	55 Ohms	SOD-123	-65°C ~ 150°C	ROHS3 Compliant
BZT52B22-E3-08	Vishay General Semiconductor - Diodes Division	22 V	±2%	410 mW	55 Ohms	SOD-123	-55°C ~ 150°C	ROHS3 Compliant
BZT52C22Q-7-F	Diodes Incorporated	22 V	±5.68%	370 mW	55 Ohms	SOD-123	-65°C ~ 150°C	ROHS3 Compliant
BZT52C22S-7-F	Diodes Incorporated	22 V	±6%	200 mW	55 Ohms	SOD-323	-65°C ~ 150°C	ROHS3 Compliant
CMHZ5251B TR PBFREE	Central Semiconductor Corp	22 V	±5%	500 mW	29 Ohms	SOD-123	-55°C ~ 150°C	ROHS3 Compliant
DDZ9708-7	Diodes Incorporated	22 V	±5%	500 mW	—	SOD-123	-65°C ~ 150°C	ROHS3 Compliant
MMSZ22T1G	onsemi	22 V	±5%	500 mW	55 Ohms	SOD-123	-55°C ~ 150°C	ROHS3 Compliant
MMSZ4708-E3-08	Vishay General Semiconductor - Diodes Division	22 V	±5%	500 mW	—	SOD-123	-55°C ~ 150°C	ROHS3 Compliant
MMSZ5251BS-7-F	Diodes Incorporated	22 V	±5%	200 mW	29 Ohms	SOD-323	-65°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (SOD-123 Package):

BZT52C22-13-F and BZT52C22-7-F from Diodes Incorporated are direct electrical equivalents with identical voltage and tolerance specifications. Both feature 500 mW power rating, providing increased thermal margin over the original 200 mW specification. Both maintain ROHS3 compliance and the full -65°C to 150°C operating temperature range. These parts are suitable for applications where higher power dissipation capability is beneficial or where supply continuity requires higher-rated alternatives.

For Tighter Voltage Tolerance:

BZT52B22-E3-08 from Vishay General Semiconductor offers ±2% voltage tolerance compared to the original ±6%, with 410 mW power rating in SOD-123 packaging. This part is applicable to precision voltage regulation circuits requiring tighter Zener voltage accuracy. Operating temperature range is -55°C to 150°C, which is narrower at the lower end than the original specification.

For Automotive-Grade Applications:

BZT52C22Q-7-F from Diodes Incorporated is qualified to AEC-Q101 automotive standards with 370 mW power rating and ±5.68% tolerance. This part maintains the full -65°C to 150°C operating temperature range and is suitable for automotive and industrial applications requiring automotive-grade component certification.

For Alternative Package Formats:

BZT52C22S-7-F and MMSZ5251BS-7-F are available in SOD-323 (SC-76) package with 200 mW power rating, matching the original power specification. These parts require PCB footprint redesign and are applicable to space-constrained designs where smaller package geometry is required.

For High-Volume Supply:

MMSZ22T1G from onsemi offers 500 mW power rating with 170,200 pieces in stock, providing substantial supply availability. This part maintains 22 V nominal voltage with ±5% tolerance and SOD-123 packaging, suitable for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can BZT52C22-13-F and BZT52C22-7-F be used as direct replacements for BZT52C22-TP?

A: Yes. Both parts are pin-compatible in SOD-123 packaging with identical 22 V nominal voltage and ±6% tolerance. The 500 mW power rating exceeds the original 200 mW specification, providing additional thermal capability. No circuit modifications are required.

Q: What is the difference between SOD-123 and SOD-323 packages?

A: SOD-123 and SOD-323 (SC-76) are different surface mount package geometries with different footprints. Parts in SOD-323 package require PCB redesign and cannot be used as direct drop-in replacements without layout modifications.

Q: Is BZT52B22-E3-08 suitable for applications requiring ±6% tolerance?

A: BZT52B22-E3-08 offers ±2% tolerance, which is tighter than the ±6% specification. This part is suitable for applications with ±6% tolerance requirements and provides improved voltage accuracy. However, the operating temperature range is -55°C to 150°C, which does not extend to -65°C like the original part.

Q: What is the significance of the 55 Ohms impedance specification?

A: Impedance (Zzt) affects the dynamic response and voltage regulation characteristics of the Zener diode. Parts with 55 Ohms impedance are electrically equivalent. Parts with different impedance values (such as 29 Ohms) have different dynamic characteristics and may require circuit evaluation for specific applications.

Q: Can parts with 500 mW power rating be used in circuits designed for 200 mW Zener diodes?

A: Yes. A higher power rating provides additional thermal margin and does not degrade circuit performance. The 500 mW parts dissipate the same power as 200 mW parts in identical circuit conditions; the higher rating simply indicates greater thermal capability.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original BZT52C22-TP.

Q: What is the difference between BZT52C22Q-7-F and other substitutes?

A: BZT52C22Q-7-F is qualified to AEC-Q101 automotive standards, making it suitable for automotive and industrial applications requiring automotive-grade component certification. Other substitutes are general-purpose industrial-grade parts.

Q: Which substitute part has the highest inventory availability?

A: MMSZ22T1G from onsemi has 170,200 pieces in stock, providing the highest inventory availability among all listed substitutes.

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