CZRF12VB-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The CZRF12VB-HF is a 12 V Zener diode manufactured by Comchip Technology, rated for 200 mW power dissipation in a surface mount 1005/SOD-323F package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 125°C with ±3% voltage tolerance and is ROHS3 compliant.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	12	V
Power - Maximum	200	mW
Tolerance	±3%	-
Impedance (Maximum)	22	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 9.1 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 125	°C
Mounting Type	Surface Mount	-
Package / Case	1005 (2512 Metric) / SOD-323F	-

Substitute Part Grouping Explanation

Substitution of the CZRF12VB-HF is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 12 V nominal
Surface mount package compatibility: SOD-323 or SOD-323F
Power rating: minimum 200 mW
Reverse leakage current: 100 nA specification
Forward voltage: 900 mV @ 10 mA or equivalent

Substitution Logic: The three identified substitute parts (BZT52C12S-TP, BZX84J-B12,115, and TDZ12J,115) all meet the core electrical requirements of 12 V zener voltage and surface mount SOD-323/SOD-323F packaging. All substitutes maintain the 100 nA reverse leakage specification and are ROHS3 compliant. Differences in power rating, impedance, tolerance, and temperature range are secondary parameters that determine application suitability within the 12 V zener category.

Parameter Comparison

Parameter	CZRF12VB-HF	BZT52C12S-TP	BZX84J-B12,115	TDZ12J,115
Manufacturer	Comchip Technology	Micro Commercial Co	Nexperia USA Inc.	Nexperia USA Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Zener (Nom)	12 V	12 V	12 V	12 V
Tolerance	±3%	±5%	±2%	±2%
Power - Max	200 mW	200 mW	550 mW	500 mW
Impedance (Max)	22 Ohms	25 Ohms	10 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 9.1 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	1.1 V @ 100 mA	1.1 V @ 100 mA
Operating Temperature	-55°C ~ 125°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Package / Case	1005 / SOD-323F	SC-76 / SOD-323	SC-90 / SOD-323F	SC-90 / SOD-323F
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	-	-	Yes (AEC-Q101)	Yes (AEC-Q101)

Engineering Selection Recommendations

BZT52C12S-TP (Micro Commercial Co): This substitute maintains identical power rating (200 mW) and forward voltage specification (900 mV @ 10 mA) to the CZRF12VB-HF. It is an active product with extended temperature range (-65°C to 150°C) and ROHS3 compliance. The ±5% tolerance is wider than the original ±3%, and impedance is slightly higher at 25 Ohms versus 22 Ohms. This part is suitable for direct replacement in non-automotive applications where the original specifications are maintained.

BZX84J-B12,115 (Nexperia USA Inc.): This substitute provides higher power dissipation (550 mW) and lower impedance (10 Ohms) compared to the CZRF12VB-HF. It features tighter tolerance (±2%), extended temperature range (-65°C to 150°C), and automotive-grade qualification (AEC-Q101). The forward voltage specification differs (1.1 V @ 100 mA). This part is suitable for applications requiring higher power handling or automotive compliance.

TDZ12J,115 (Nexperia USA Inc.): This substitute offers 500 mW power rating and 10 Ohms impedance with ±2% tolerance. It includes automotive-grade qualification (AEC-Q101) and extended upper temperature limit (150°C). The forward voltage specification is 1.1 V @ 100 mA. This part is suitable for automotive applications and designs requiring improved thermal performance.

Frequently Asked Questions (FAQ)

Q: Can BZT52C12S-TP be used as a direct replacement for CZRF12VB-HF?

A: Yes. Both parts share identical 12 V zener voltage, 200 mW power rating, and 900 mV forward voltage specification. The BZT52C12S-TP is an active product with ROHS3 compliance. The tolerance difference (±5% versus ±3%) and impedance difference (25 Ohms versus 22 Ohms) are within acceptable substitution parameters for most applications.

Q: What is the difference between BZX84J-B12,115 and TDZ12J,115?

A: Both parts are manufactured by Nexperia and feature 12 V zener voltage, ±2% tolerance, 10 Ohms impedance, and AEC-Q101 automotive qualification. BZX84J-B12,115 provides 550 mW power rating, while TDZ12J,115 provides 500 mW. Both operate to 150°C upper temperature limit. Selection depends on specific power dissipation requirements.

Q: Are the SOD-323 and SOD-323F packages interchangeable?

A: SOD-323 and SOD-323F are both surface mount packages used for zener diodes. Physical dimensions are similar, but SOD-323F is a variant. Verify PCB footprint compatibility before substitution. BZT52C12S-TP uses SOD-323, while BZX84J-B12,115 and TDZ12J,115 use SOD-323F.

Q: Can I use a higher power-rated substitute in place of the 200 mW CZRF12VB-HF?

A: Yes. BZX84J-B12,115 (550 mW) and TDZ12J,115 (500 mW) can replace the 200 mW CZRF12VB-HF. Higher power rating provides additional thermal margin. Verify that circuit design accommodates the different impedance (10 Ohms versus 22 Ohms) and forward voltage characteristics.

Q: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q101) is required only for automotive-grade applications. BZX84J-B12,115 and TDZ12J,115 include AEC-Q101 qualification. BZT52C12S-TP does not carry automotive qualification. Select based on application requirements.

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

A: The CZRF12VB-HF specifies ±3% tolerance, BZT52C12S-TP specifies ±5%, and both Nexperia parts specify ±2%. Tighter tolerance (±2%) provides more precise voltage regulation. Wider tolerance (±5%) may require circuit design margin verification. Select based on voltage regulation precision requirements.

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