CZRF52C9V1-HF Zener Diode 9.1V 350mW Equivalent & Substitute Parts

Part Overview

The CZRF52C9V1-HF is an active Zener diode manufactured by Comchip Technology, designed for voltage regulation and protection applications. This surface mount component operates at a nominal Zener voltage of 9.1V with a maximum power dissipation of 350mW in a 1005/SOD-323F package. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Zener diode category. Alternative components may be required due to inventory availability, lead time considerations, or specific application constraints while maintaining functional equivalence.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	9.1	V
Tolerance	±5%	-
Power - Max	350	mW
Impedance (Max)	10	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 7V	-
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	-
Operating Temperature Range	-55°C to 125°C	-
Mounting Type	Surface Mount	-
Package / Case	1005 (2512 Metric) / SOD-323F	-
RoHS Status	ROHS3 Compliant	-
MSL Rating	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by equivalence in the following critical parameters: nominal Zener voltage (Vz), voltage tolerance, maximum power dissipation (Pmax), impedance characteristics, and package compatibility. The CZRF52C9V1-HF operates at 9.1V with 350mW maximum power and ±5% tolerance in a 1005/SOD-323F package.

Substitute parts are grouped into two categories:

Category 1: Direct Comchip Technology Equivalent CZRF52C9V1 shares identical Zener voltage (9.1V), tolerance (±5%), impedance (10 Ohms), forward voltage characteristics, and package format. The primary difference is reduced maximum power rating (200mW versus 350mW), which represents a derating condition suitable for applications with lower power requirements.

Category 2: Cross-Manufacturer Equivalents BZT52C9V1S-TP and MMXZ5239B-TP are manufactured by Micro Commercial Co and provide 9.1V Zener voltage in SOD-323 package format. Both operate within the specified temperature range and maintain RoHS3 compliance. Electrical parameters vary within acceptable substitution tolerances: BZT52C9V1S-TP operates at ±6% tolerance with 15 Ohms impedance; MMXZ5239B-TP maintains ±5% tolerance with 10 Ohms impedance matching the original specification.

Parameter Comparison

Parameter	CZRF52C9V1-HF (Main)	CZRF52C9V1	BZT52C9V1S-TP	MMXZ5239B-TP
Manufacturer	Comchip Technology	Comchip Technology	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom)	9.1 V	9.1 V	9.1 V	9.1 V
Tolerance	±5%	±5%	±6%	±5%
Power - Max	350 mW	200 mW	200 mW	200 mW
Impedance (Max)	10 Ohms	10 Ohms	15 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 7 V	100 nA @ 7 V	500 nA @ 6 V	3 µA @ 7 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	1.2 V @ 100 mA
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-65°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	1005 / SOD-323F	1005 / SOD-323F	SC-76 / SOD-323	SC-76 / SOD-323
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

CZRF52C9V1 (Comchip Technology) This direct equivalent from the same manufacturer maintains identical electrical characteristics and package specifications as the main part. Selection is appropriate when power dissipation requirements do not exceed 200mW and inventory of the primary part is unavailable. Both components share identical Zener voltage tolerance (±5%), impedance (10 Ohms), and forward voltage characteristics, ensuring functional compatibility in existing circuit designs.

BZT52C9V1S-TP (Micro Commercial Co) This cross-manufacturer substitute provides 9.1V Zener voltage in SOD-323 package with extended operating temperature range (-65°C to 150°C). The ±6% tolerance and 15 Ohms impedance represent acceptable variations for voltage regulation applications. Selection is suitable when extended temperature performance is required and power dissipation remains below 200mW. RoHS3 compliance and MSL-1 rating maintain environmental and handling compatibility.

MMXZ5239B-TP (Micro Commercial Co) This substitute maintains ±5% tolerance and 10 Ohms impedance matching the original specification, with extended upper operating temperature limit (150°C). The 3µA reverse leakage current at 7V represents a higher leakage characteristic compared to the main part. Selection is appropriate for applications prioritizing impedance matching and tolerance precision, with power dissipation limited to 200mW. RoHS3 compliance and MSL-1 rating are maintained.

All substitute parts are active products with current manufacturing status and full RoHS3 compliance, suitable for direct substitution in applications where the specified electrical parameters are compatible with circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can CZRF52C9V1 replace CZRF52C9V1-HF in all applications?

A: CZRF52C9V1 is suitable for applications where maximum power dissipation does not exceed 200mW. Both components share identical Zener voltage (9.1V), tolerance (±5%), impedance (10 Ohms), and package format (1005/SOD-323F). If the circuit design requires the full 350mW power rating of the original part, CZRF52C9V1 is not appropriate.

Q: What are the package compatibility considerations for cross-manufacturer substitutes?

A: BZT52C9V1S-TP and MMXZ5239B-TP use SOD-323 package designation, which is mechanically and electrically compatible with the 1005/SOD-323F package of the main part. Both are surface mount components with identical pin configuration and footprint compatibility for PCB assembly.

Q: How do tolerance differences affect circuit performance?

A: CZRF52C9V1-HF, CZRF52C9V1, and MMXZ5239B-TP operate at ±5% tolerance, while BZT52C9V1S-TP operates at ±6% tolerance. For a 9.1V nominal Zener voltage, this represents a maximum variation of ±0.455V (±5%) or ±0.546V (±6%). Circuit designs must accommodate these tolerance ranges; applications requiring tighter voltage regulation may require additional compensation.

Q: Are there temperature range limitations for substitute selection?

A: CZRF52C9V1-HF and CZRF52C9V1 operate from -55°C to 125°C. BZT52C9V1S-TP extends to -65°C to 150°C, and MMXZ5239B-TP operates to -55°C to 150°C. Selection should match the application's thermal environment. Extended temperature range substitutes are suitable for all applications within the original temperature specification.

Q: What is the significance of impedance (Zzt) differences?

A: Impedance affects voltage regulation stability and transient response. CZRF52C9V1-HF, CZRF52C9V1, and MMXZ5239B-TP specify 10 Ohms impedance, while BZT52C9V1S-TP specifies 15 Ohms. Lower impedance provides better regulation characteristics. Applications sensitive to voltage ripple or transient response should prioritize 10 Ohms impedance specifications.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes, all substitute parts are surface mount components with SOD-323 package compatibility and identical pin configuration. PCB footprints designed for 1005/SOD-323F accommodate all listed substitutes. Assembly processes and reflow profiles remain unchanged.

Q: What compliance certifications are maintained across all substitute parts?

A: All parts maintain RoHS3 compliance, MSL-1 (Unlimited) moisture sensitivity rating, and REACH Unaffected status. ECCN classification is EAR99 for all components. Regulatory and environmental compliance is consistent across the main part and all substitutes.

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