CZRF52C36-HF Equivalent & Substitute Parts

Part Overview

The CZRF52C36-HF is a Zener diode manufactured by Comchip Technology, rated at 36 V nominal voltage with 200 mW maximum power dissipation. This surface mount component in 1005/SOD-323F package is designed for voltage regulation and protection applications. The part is currently active in production with 897 pieces in stock inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit selection from qualified alternatives with compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Tolerance	±5%	—
Power - Max	200	mW
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 27 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	1005 (2512 Metric) / SOD-323F	—
RoHS Status	ROHS3 Compliant	—
MSL	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CZRF52C36-HF is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 36 V (exact match required)
Mounting Type: Surface Mount
Package / Case: SOD-323F compatible
Operating Temperature Range: Must encompass or exceed -55°C to 125°C
RoHS Status: ROHS3 Compliant
MSL: 1 (Unlimited)

Secondary Compatibility Parameters:

Tolerance: ±5% or tighter acceptable
Power - Max: Equal to or greater than 200 mW
Impedance (Max): Lower values acceptable (improved performance)
Current - Reverse Leakage: Lower values acceptable (improved performance)

The three identified substitute parts (BZX84J-B36,115; BZX84J-C36,115; PZU36B,115) all meet the primary matching criteria. Differences in power rating, impedance, and leakage current represent performance enhancements or variations within acceptable substitution parameters.

Parameter Comparison

Parameter	CZRF52C36-HF	BZX84J-B36,115	BZX84J-C36,115	PZU36B,115
Manufacturer	Comchip Technology	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	36 V	36 V	36 V	36 V
Tolerance	±5%	±2%	±5%	±5%
Power - Max	200 mW	550 mW	550 mW	310 mW
Impedance (Max)	90 Ohms	60 Ohms	60 Ohms	60 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 27 V	50 nA @ 25.2 V	50 nA @ 25.2 V	50 nA @ 27 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	1.1 V @ 100 mA
Operating Temperature Range	-55 to 125 °C	-65 to 150 °C	-65 to 150 °C	-65 to 150 °C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	1005 / SOD-323F	SC-90 / SOD-323F	SC-90 / SOD-323F	SC-90 / SOD-323F
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

BZX84J-B36,115 (Nexperia USA Inc.)

This substitute offers enhanced performance specifications with 550 mW power rating (2.75× the original), ±2% tolerance (tighter than ±5%), and reduced impedance (60 Ohms vs. 90 Ohms). Operating temperature range extends to -65°C to 150°C, exceeding the original specification. The part carries AEC-Q101 automotive qualification and is ROHS3 compliant. Selection of this part is appropriate when higher power dissipation capability or tighter voltage tolerance is required within the same 36 V zener voltage class.

BZX84J-C36,115 (Nexperia USA Inc.)

This substitute maintains the ±5% tolerance specification of the original part while providing 550 mW power rating and 60 Ohms impedance. Operating temperature range is -65°C to 150°C. AEC-Q101 automotive qualification and ROHS3 compliance are provided. This part represents a direct functional upgrade in power handling with identical tolerance specification.

PZU36B,115 (Nexperia USA Inc.)

This substitute provides 310 mW power rating (1.55× the original) with ±5% tolerance matching the original specification. Impedance is reduced to 60 Ohms. Operating temperature range extends to -65°C to 150°C. AEC-Q100 automotive qualification is provided with ROHS3 compliance. This part offers moderate power enhancement while maintaining tolerance and temperature performance characteristics.

All three substitutes are active production parts with established inventory availability and full compliance with RoHS3 and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can BZX84J-B36,115 be used as a direct replacement for CZRF52C36-HF?

A: Yes. Both parts share the same 36 V nominal zener voltage, ±5% tolerance compatibility, surface mount configuration, and SOD-323F package. The BZX84J-B36,115 provides enhanced specifications with higher power rating (550 mW vs. 200 mW) and lower impedance (60 Ohms vs. 90 Ohms), making it functionally compatible for the same application circuit.

Q: What is the difference between BZX84J-B36,115 and BZX84J-C36,115?

A: Both parts are manufactured by Nexperia and share identical electrical specifications: 36 V zener voltage, 550 mW power rating, 60 Ohms impedance, and -65°C to 150°C operating range. The primary difference is tolerance: BZX84J-B36,115 offers ±2% tolerance while BZX84J-C36,115 offers ±5% tolerance. Selection depends on circuit requirements for voltage regulation precision.

Q: Why does PZU36B,115 have lower power rating than the other substitutes?

A: PZU36B,115 is rated at 310 mW, which is still 1.55 times the original CZRF52C36-HF specification of 200 mW. This part represents a mid-range option between the original and the higher-power BZX84J series. Selection is appropriate when moderate power enhancement is needed without the full 550 mW capability.

Q: Are all substitute parts automotive qualified?

A: BZX84J-B36,115 and BZX84J-C36,115 carry AEC-Q101 automotive qualification. PZU36B,115 carries AEC-Q100 automotive qualification. The original CZRF52C36-HF does not list automotive qualification. All parts are ROHS3 compliant and REACH unaffected.

Q: Can these parts be used interchangeably in high-temperature applications?

A: All substitute parts support operating temperature range of -65°C to 150°C, which exceeds the original part specification of -55°C to 125°C. Substitutes are suitable for applications requiring extended high-temperature operation within the -65°C to 150°C range.

Q: What is the significance of the SOD-323F package designation?

A: SOD-323F is the industry-standard surface mount package for small-signal zener diodes. All parts in this comparison use SOD-323F packaging, ensuring mechanical and electrical compatibility on PCB layouts designed for this package footprint. The original CZRF52C36-HF uses 1005 (2512 Metric) designation, which is equivalent to SOD-323F.

Q: How do impedance differences affect circuit performance?

A: Lower impedance (60 Ohms in substitutes vs. 90 Ohms in original) results in improved voltage regulation characteristics and reduced dynamic resistance. This provides better load regulation and transient response in voltage regulation circuits. The difference is beneficial for most applications.

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