CZRT55C13-G Zener Diode 13V 350mW SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CZRT55C13-G is a surface mount Zener diode manufactured by Comchip Technology, rated at 13 V nominal Zener voltage with 350 mW maximum power dissipation in SOT-23-3 package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the SOT-23-3 form factor, enabling direct replacement in voltage regulation and transient protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	13	V
Power - Max	350	mW
Tolerance	±6%	—
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CZRT55C13-G is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 13 V nominal
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting: Surface Mount
Operating temperature range: -65°C to 150°C minimum
RoHS3 compliance and MSL 1 rating

Secondary Compatibility Factors:

Power rating: 300 mW to 350 mW acceptable
Tolerance: ±2% to ±6% acceptable
Impedance (Max): 13 to 30 Ohms acceptable
Reverse leakage current: 100 to 500 nA acceptable

All substitute parts listed maintain the 13 V Zener voltage specification and SOT-23-3 package geometry, ensuring mechanical and electrical interchangeability. Variations in power rating, tolerance, and impedance remain within functional equivalence for standard voltage regulation and protection circuits.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Power (mW)	Tolerance	Zzt (Ohms)	Ir @ Vr (nA)	Vf (mV)	Temp Range (°C)	Package	RoHS3
CZRT55C13-G	Comchip Technology	13	350	±6%	30	100 @ 8V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
BZX84B13-7-F	Diodes Incorporated	13	300	±2%	30	100 @ 8V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
BZX84B13Q-7-F	Diodes Incorporated	13	300	±2%	30	100 @ 8V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
BZX84C13-7-F	Diodes Incorporated	13	300	±6%	30	100 @ 8V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
BZX84C13-TP	Micro Commercial Co	13	350	±5%	30	100 @ 8V	900 @ 10mA	-55 to 150	SOT-23-3	Yes
DDZX13B-13	Diodes Incorporated	13	300	±3%	14	100 @ 10V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
DDZX13B-7	Diodes Incorporated	13	300	±3%	14	100 @ 10V	900 @ 10mA	-65 to 150	SOT-23-3	Yes
MMBZ5243B-7-F	Diodes Incorporated	13	350	±5%	13	500 @ 9.9V	900 @ 10mA	-65 to 150	SOT-23-3	Yes

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility):

BZX84C13-7-F and CZRT55C13-G share identical electrical specifications including 13 V Zener voltage, ±6% tolerance, 30 Ohms maximum impedance, and -65°C to 150°C operating range. Both are RoHS3 compliant with MSL 1 rating. The primary difference is power rating (300 mW vs. 350 mW), with BZX84C13-7-F suitable for applications not requiring the full 350 mW dissipation capacity.

Tighter Tolerance Alternatives:

BZX84B13-7-F and BZX84B13Q-7-F offer ±2% tolerance compared to CZRT55C13-G's ±6%, providing improved voltage accuracy. Both maintain 13 V nominal voltage and SOT-23-3 package compatibility. BZX84B13Q-7-F includes AEC-Q101 automotive qualification. These parts are suitable for precision voltage reference applications where tighter tolerance is required.

Enhanced Performance Option:

MMBZ5243B-7-F provides 350 mW power rating matching CZRT55C13-G while offering lower impedance (13 Ohms vs. 30 Ohms), resulting in improved voltage regulation characteristics. Higher reverse leakage current (500 nA @ 9.9 V) is acceptable for most applications. AEC-Q101 qualified variant available.

Lower Temperature Range Consideration:

BZX84C13-TP operates from -55°C to 150°C, limiting use in applications requiring full -65°C minimum temperature specification. Suitable only when minimum operating temperature requirement is -55°C or higher.

Improved Impedance Option:

DDZX13B-13 and DDZX13B-7 feature lower impedance (14 Ohms) and ±3% tolerance, providing superior voltage regulation performance. Both maintain full -65°C to 150°C temperature range and RoHS3 compliance.

All substitute parts are Active product status with current manufacturing and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can BZX84C13-7-F replace CZRT55C13-G in all applications?

A: BZX84C13-7-F is electrically equivalent with matching 13 V Zener voltage, ±6% tolerance, 30 Ohms impedance, and -65°C to 150°C operating range. The 300 mW power rating is lower than CZRT55C13-G's 350 mW. Substitution is valid when circuit power dissipation does not exceed 300 mW. Both use identical SOT-23-3 package and are RoHS3 compliant.

Q: What is the difference between BZX84B13-7-F and BZX84C13-7-F?

A: Both parts share 13 V Zener voltage, 300 mW power rating, 30 Ohms impedance, and SOT-23-3 package. The primary difference is tolerance: BZX84B13-7-F offers ±2% tolerance while BZX84C13-7-F offers ±6% tolerance. Select BZX84B13-7-F for applications requiring tighter voltage accuracy.

Q: Is BZX84B13Q-7-F suitable for automotive applications?

A: Yes. BZX84B13Q-7-F carries AEC-Q101 automotive qualification and meets all electrical specifications of CZRT55C13-G including 13 V Zener voltage, ±2% tolerance, and -65°C to 150°C operating range. It is suitable for automotive voltage regulation and protection circuits.

Q: Why does MMBZ5243B-7-F have lower impedance than other substitutes?

A: MMBZ5243B-7-F is designed with lower impedance (13 Ohms vs. 30 Ohms) to provide superior voltage regulation performance and faster transient response. This characteristic makes it suitable for applications requiring improved load regulation. All other electrical parameters remain compatible with CZRT55C13-G.

Q: Can I use BZX84C13-TP if my circuit operates at -60°C?

A: No. BZX84C13-TP operates from -55°C to 150°C, which does not meet the -65°C minimum requirement. Use only when your application's minimum operating temperature is -55°C or higher. For full -65°C compatibility, select BZX84C13-7-F, BZX84B13-7-F, DDZX13B-13, or MMBZ5243B-7-F.

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

A: All listed substitute parts are available in Tape & Reel (TR) packaging suitable for automated assembly. BZX84C13-7-F is also available in Cut Tape (CT) and Digi-Reel® packaging options. Verify packaging availability with your supplier for specific procurement requirements.

Q: What is the significance of ±3% tolerance in DDZX13B series?

A: DDZX13B-13 and DDZX13B-7 offer ±3% tolerance, providing tighter voltage accuracy than CZRT55C13-G's ±6% while remaining less stringent than BZX84B13-7-F's ±2%. This tolerance level is suitable for applications requiring improved accuracy without the cost premium of ±2% parts. Both maintain 13 V nominal voltage and SOT-23-3 compatibility.

Q: Is there a difference between DDZX13B-13 and DDZX13B-7?

A: DDZX13B-13 and DDZX13B-7 are electrically identical with 13 V Zener voltage, 300 mW power rating, ±3% tolerance, 14 Ohms impedance, and -65°C to 150°C operating range. Both use SOT-23-3 package and are RoHS3 compliant. Inventory availability may differ; consult your supplier for stock status.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message