CZRW55C22-G Zener Diode 22V 500mW SOD-123 Equivalent & Substitute Parts

Part Overview

The CZRW55C22-G is a 22V 500mW Zener diode manufactured by Comchip Technology in SOD-123 surface mount package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute selection is based on matching critical electrical parameters: nominal Zener voltage (22V), power dissipation capability, package type (SOD-123), and thermal operating range compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Power - Max	500	mW
Tolerance	±6%	-
Impedance (Max)	55	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 15.4V
Voltage - Forward (Max) @ If	900	mV @ 10mA
Operating Temperature	-65 to 150	°C
Package / Case	SOD-123	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for CZRW55C22-G are classified into three categories based on electrical parameter alignment and product status:

MFR Recommended Substitutes: Parts designated as manufacturer-recommended direct replacements maintain identical or superior electrical specifications with active product status. These include BZT52C22-HF (Comchip Technology) and DDZ22D-7 (Diodes Incorporated).

Direct Manufacturer Equivalents: Parts with matching nominal Zener voltage (22V) and SOD-123 package but with variations in power rating or impedance characteristics. These include BZT52C22-E3-18 (Vishay, 410mW), BZT52C22-TP (Micro Commercial Co, 200mW), and BZT52C22 (Taiwan Semiconductor Corporation, 500mW).

Parametric Equivalents: Parts meeting core electrical requirements (22V Zener voltage, 500mW power, SOD-123 package) with minor tolerance or impedance variations. These include BZT52C22-13-F and BZT52C22-7-F (both Diodes Incorporated).

Critical Substitution Parameters:

Nominal Zener voltage: 22V (mandatory match)
Package type: SOD-123 (mandatory match)
Power dissipation: 500mW (preferred) or 410mW minimum
Impedance: 55 Ohms (preferred) or 30 Ohms (acceptable)
Tolerance: ±6% (preferred) or ±5% (acceptable) or ±3% (superior)
Operating temperature range: -65°C to 150°C (mandatory minimum)

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ 10mA	Temp Range	Status
CZRW55C22-G	Comchip Technology	22V	±6%	500mW	55Ω	900mV	-65 to 150°C	Obsolete
BZT52C22-HF	Comchip Technology	22V	±5%	500mW	55Ω	900mV	-55 to 150°C	Active
BZT52C22-E3-18	Vishay General Semiconductor	22V	±5%	410mW	55Ω	-	-55 to 150°C	Active
BZT52C22-TP	Micro Commercial Co	22V	±6%	200mW	55Ω	900mV	-65 to 150°C	Active
DDZ22D-7	Diodes Incorporated	22V	±3%	500mW	30Ω	900mV	-65 to 150°C	Active
BZT52C22	Taiwan Semiconductor Corporation	22V	±5%	500mW	55Ω	1V	-65 to 150°C	Active
BZT52C22-13-F	Diodes Incorporated	22V	±6%	500mW	55Ω	900mV	-65 to 150°C	Active
BZT52C22-7-F	Diodes Incorporated	22V	±6%	500mW	55Ω	900mV	-65 to 150°C	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

BZT52C22-7-F and BZT52C22-13-F (Diodes Incorporated) provide direct parameter equivalence to CZRW55C22-G with identical electrical specifications and operating temperature range. Both parts maintain active product status, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1). These parts are recommended for direct replacement in existing designs without circuit modification.

DDZ22D-7 (Diodes Incorporated) offers superior tolerance specification (±3% versus ±6%) and lower impedance (30Ω versus 55Ω), resulting in improved voltage regulation characteristics. This part maintains full temperature range compatibility (-65°C to 150°C) and active product status. Selection of DDZ22D-7 is appropriate when enhanced voltage stability is required.

Secondary Substitutes (Conditional Compatibility):

BZT52C22-HF (Comchip Technology) maintains manufacturer continuity and identical power rating (500mW). Operating temperature minimum is -55°C (versus -65°C for original part). This part is suitable for applications where minimum operating temperature does not fall below -55°C.

BZT52C22 (Taiwan Semiconductor Corporation) provides 500mW power rating and full temperature range (-65°C to 150°C) with ±5% tolerance. Forward voltage specification is 1V at 10mA (versus 900mV). This part is suitable where forward voltage tolerance of 100mV is acceptable.

Limited Substitutes (Power Derating Required):

BZT52C22-TP (Micro Commercial Co) operates at reduced power dissipation (200mW versus 500mW). This part is suitable only for applications where actual power dissipation does not exceed 200mW. Circuit thermal analysis is required to confirm compatibility.

BZT52C22-E3-18 (Vishay General Semiconductor) operates at 410mW power rating. This part is suitable for applications where actual power dissipation does not exceed 410mW.

Compliance Verification:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification matching the original CZRW55C22-G specification. All parts are classified under HTSUS code 8541.10.0050.

Frequently Asked Questions (FAQ)

Q: Can BZT52C22-TP (200mW) be used as a direct replacement for CZRW55C22-G (500mW)?

A: BZT52C22-TP is electrically compatible only if circuit power dissipation does not exceed 200mW. The original design must be analyzed to confirm actual power dissipation at the Zener diode. If the circuit requires 500mW dissipation capability, BZT52C22-TP will operate outside its rated power envelope and is not suitable.

Q: What is the difference between BZT52C22-7-F and BZT52C22-13-F?

A: Both parts are manufactured by Diodes Incorporated and share identical electrical parameters: 22V nominal Zener voltage, ±6% tolerance, 500mW power rating, 55Ω impedance, and -65°C to 150°C operating range. The suffix designations (-7-F and -13-F) indicate different manufacturing date codes or tape reel configurations. Electrical performance is equivalent for circuit design purposes.

Q: Why does DDZ22D-7 have lower impedance (30Ω) than the original part (55Ω)?

A: Impedance variation reflects different semiconductor manufacturing processes between Diodes Incorporated and Comchip Technology. Lower impedance (30Ω) in DDZ22D-7 results in improved voltage regulation and reduced dynamic resistance. This is a performance advantage for voltage reference applications. The part remains compatible with CZRW55C22-G circuit designs.

Q: Is BZT52C22-HF suitable for applications operating at -65°C?

A: BZT52C22-HF specifies operating temperature range of -55°C to 150°C. Applications requiring operation at -65°C must use parts with -65°C minimum rating: CZRW55C22-G (obsolete), BZT52C22-7-F, BZT52C22-13-F, DDZ22D-7, BZT52C22-TP, or BZT52C22 (Taiwan Semiconductor Corporation).

Q: Can BZT52C22 (Taiwan Semiconductor Corporation) be used if forward voltage specification is 1V instead of 900mV?

A: BZT52C22 forward voltage specification of 1V at 10mA is 100mV higher than the original 900mV specification. This part is suitable if circuit design accommodates 1V forward voltage. Applications with strict forward voltage requirements below 950mV should use parts specifying 900mV maximum: CZRW55C22-G, BZT52C22-HF, BZT52C22-TP, BZT52C22-7-F, BZT52C22-13-F, or DDZ22D-7.

Q: What is the advantage of ±3% tolerance (DDZ22D-7) over ±6% tolerance (CZRW55C22-G)?

A: ±3% tolerance provides tighter Zener voltage control, resulting in voltage regulation accuracy of ±0.66V around 22V nominal (21.34V to 22.66V) compared to ±1.32V for ±6% tolerance (20.68V to 23.32V). DDZ22D-7 is preferred for precision voltage reference applications where voltage stability is critical.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Yes. All substitute parts listed are supplied in Tape & Reel packaging suitable for automated assembly processes. Original CZRW55C22-G packaging specification was not provided; however, all substitutes maintain SOD-123 package format compatible with standard pick-and-place equipment.

Q: What inventory availability should be considered for production planning?

A: BZT52C22-7-F (Diodes Incorporated) has highest inventory: 41,300 pieces. BZT52C22 (Taiwan Semiconductor Corporation) has 47,400 pieces. DDZ22D-7 (Diodes Incorporated) has 20,400 pieces. BZT52C22-HF (Comchip Technology) has 1,055 pieces. For high-volume production, BZT52C22-7-F or BZT52C22 are recommended based on availability.

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