BZT52C8V2LP-7 Equivalent & Substitute Parts

Part Overview

The BZT52C8V2LP-7 is a surface mount Zener diode manufactured by Diodes Incorporated, rated at 8.2 V nominal with 250 mW maximum power dissipation. The device is packaged in 0402 (1006 Metric) form factor and is classified as Active product status. This component is used for voltage regulation and transient protection in electronic circuits. Substitute parts are identified based on matching electrical specifications and package compatibility to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.2	V
Tolerance	±6%	-
Power - Max	250	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	700 nA @ 5 V	-
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	-
Operating Temperature	-65°C ~ 150°C	-
Mounting Type	Surface Mount	-
Package / Case	0402 (1006 Metric)	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the BZT52C8V2LP-7 are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Voltage - Zener (Nom): 8.2 V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Factors:

Power - Max: Substitutes with equal or greater power rating maintain circuit functionality
Operating Temperature Range: Substitutes must support the application's thermal requirements
Package / Case: SOD-123 and 0402 packages are mechanically compatible with PCB layouts designed for the original part

Substitutes are divided into two categories: parts with matching 0402 package form factor and parts with SOD-123 package form factor. SOD-123 substitutes provide higher power dissipation capability (200 mW to 500 mW) compared to the original 250 mW rating, offering design flexibility for applications requiring increased thermal headroom.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Zener (Nom) (V)	Tolerance	Power - Max (mW)	Impedance (Max) (Ohms)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature (°C)	Package / Case	Product Status
BZT52C8V2LP-7	Diodes Incorporated	8.2	±6%	250	15	700 nA @ 5 V	900 mV @ 10 mA	-65 ~ 150	0402 (1006 Metric)	Active
BZT52C8V2-TP	Micro Commercial Co	8.2	±6%	200	15	700 nA @ 5 V	900 mV @ 10 mA	-65 ~ 150	SOD-123	Active
CZRQR52C8V2-HF	Comchip Technology	8.2	±5%	125	7	100 nA @ 6 V	900 mV @ 10 mA	-55 ~ 125	0402 (1006 Metric)	Obsolete
MMSZ4694-TP	Micro Commercial Co	8.2	±5%	500	-	10 µA @ 6.2 V	950 mV @ 10 mA	-55 ~ 150	SOD-123	Active
MMSZ4694T1G	onsemi	8.2	-	500	-	1 µA @ 6.2 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
MMSZ4694T3G	onsemi	8.2	-	500	-	1 µA @ 6.2 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
MMSZ5237B-TP	Micro Commercial Co	8.2	±5%	500	8	3 µA @ 6.5 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
SZMMSZ4694T1G	onsemi	8.2	±5%	500	-	1 µA @ 6.2 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
SZMMSZ4694T3G	onsemi	8.2	-	500	-	1 µA @ 6.2 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
SZMMSZ8V2ET1G	onsemi	8.2	±5%	500	15	700 nA @ 5 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active
SZMMSZ8V2T1G	onsemi	8.2	±5%	500	15	700 nA @ 5 V	900 mV @ 10 mA	-55 ~ 150	SOD-123	Active

Engineering Selection Recommendations

Active Product Status Substitutes: The following parts maintain Active product status and are recommended for new designs: BZT52C8V2-TP, MMSZ4694-TP, MMSZ4694T1G, MMSZ4694T3G, MMSZ5237B-TP, SZMMSZ4694T1G, SZMMSZ4694T3G, SZMMSZ8V2ET1G, and SZMMSZ8V2T1G. These parts ensure long-term availability and supply chain continuity.

Automotive Grade Substitutes: Parts qualified to AEC-Q101 automotive standard are available: SZMMSZ4694T1G, SZMMSZ4694T3G, SZMMSZ8V2ET1G, and SZMMSZ8V2T1G. These components are suitable for automotive and high-reliability applications requiring automotive-grade qualification.

Package Compatibility: The original BZT52C8V2LP-7 uses 0402 (1006 Metric) package. The substitute CZRQR52C8V2-HF maintains this package form factor but carries Obsolete product status and reduced operating temperature range (-55°C to 125°C versus -65°C to 150°C). All other substitutes use SOD-123 package, which requires PCB layout modification but provides increased power dissipation capability.

RoHS Compliance: All listed substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing processes and environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can I use a SOD-123 package substitute in place of the 0402 package original part?

A: SOD-123 substitutes require PCB layout modification as the package footprint differs from 0402 (1006 Metric). The electrical specifications are compatible, but physical placement and land pattern must be redesigned. If PCB layout cannot be modified, use CZRQR52C8V2-HF which maintains the 0402 package form factor.

Q: What is the difference between MMSZ4694T1G and MMSZ4694T3G?

A: Both parts are manufactured by onsemi with identical electrical specifications: 8.2 V nominal, 500 mW power rating, SOD-123 package, and Active product status. The designation suffix (T1G versus T3G) indicates different manufacturing tape configurations or date codes. Electrical performance is equivalent for circuit applications.

Q: Why do some substitutes have higher power ratings (500 mW) than the original (250 mW)?

A: Higher power-rated substitutes provide increased thermal headroom and design margin. A 500 mW device can safely operate in applications designed for 250 mW operation. This allows flexibility in circuit design and may improve reliability in thermally constrained environments.

Q: Are SZMMSZ8V2ET1G and SZMMSZ8V2T1G interchangeable?

A: Yes, both parts are manufactured by onsemi with AEC-Q101 automotive qualification, 8.2 V nominal voltage, 500 mW power rating, SOD-123 package, and identical electrical parameters. The suffix variation (ET1G versus T1G) reflects manufacturing tape configuration differences without affecting electrical equivalence.

Q: Should I use automotive-grade substitutes (SZMMSZ series) for non-automotive applications?

A: Automotive-grade parts with AEC-Q101 qualification meet higher reliability and quality standards applicable to all applications. Their use in non-automotive circuits provides enhanced reliability without disadvantage. Selection depends on application requirements and cost considerations.

Q: What is the impact of operating temperature range differences between substitutes?

A: The original BZT52C8V2LP-7 operates from -65°C to 150°C. Substitute CZRQR52C8V2-HF operates from -55°C to 125°C, providing a narrower range. For applications requiring full -65°C to 150°C operation, use substitutes with matching or wider temperature specifications: BZT52C8V2-TP, MMSZ4694-TP, MMSZ4694T1G, MMSZ4694T3G, MMSZ5237B-TP, SZMMSZ4694T1G, SZMMSZ4694T3G, SZMMSZ8V2ET1G, or SZMMSZ8V2T1G.

Q: Why is CZRQR52C8V2-HF listed as Obsolete?

A: Obsolete product status indicates the manufacturer has discontinued production. While inventory may remain available, long-term supply cannot be guaranteed. For new designs, select from Active status substitutes to ensure sustained component availability throughout the product lifecycle.

Q: How do impedance specifications affect substitution?

A: Impedance (Zzt) values of 15 Ohms (original part and SZMMSZ8V2ET1G, SZMMSZ8V2T1G) indicate higher dynamic impedance compared to lower values (7 Ohms for CZRQR52C8V2-HF, 8 Ohms for MMSZ5237B-TP). Lower impedance provides better voltage regulation under load transients. For voltage regulation applications, lower impedance substitutes may offer improved performance.

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