CZ5337B TR Equivalent & Substitute Parts

Part Overview

The CZ5337B TR is a 4.7 V, 5 W Zener diode manufactured by Central Semiconductor Corp in DO-201AA through-hole axial packaging. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with a maximum impedance of 2 Ohms. Identification of compatible alternatives ensures design continuity and supply chain reliability for applications requiring this specific voltage regulation characteristic.

Substiute Parts

CZ5337B TR

Central Semiconductor CorpIn Stock: 831CZ5337B TR Datasheet

Current PartRFQ

1N5337BRLG

onsemiIn Stock: 82661N5337BRLG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CZ5337B TR is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Zener (Nom): 4.7 V
• Power - Max: 5 W
• Tolerance: ±5%
• Impedance (Max): 2 Ohms
• Voltage - Forward (Max) @ If: 1.2 V @ 1 A
• Operating Temperature Range: -65°C to 200°C
• Mounting Type: Through Hole
• Package / Case: Axial configuration

The 1N5337BRLG manufactured by onsemi meets all mandatory electrical and mechanical parameters. Both devices function as 4.7 V, 5 W Zener diodes with identical voltage tolerance, forward voltage characteristics, and operating temperature specifications. The axial through-hole packaging of the 1N5337BRLG provides direct mechanical compatibility with the original CZ5337B TR footprint.

Parameter Comparison

Engineering Selection Recommendations

The 1N5337BRLG is a direct functional equivalent for the obsolete CZ5337B TR. Selection of the 1N5337BRLG is supported by the following engineering factors:

Product Status: The CZ5337B TR is classified as obsolete, creating supply constraints. The 1N5337BRLG maintains active product status with 8200 pieces in current inventory, ensuring long-term availability.

Electrical Equivalence: All critical electrical parameters match exactly: 4.7 V nominal Zener voltage, 5 W maximum power dissipation, ±5% tolerance, 2 Ohms maximum impedance, and 1.2 V forward voltage at 1 A. The 1N5337BRLG exhibits lower reverse leakage current (5 µA versus 10 µA at 1 V), which represents improved performance within the same specification class.

Mechanical Compatibility: Both devices employ axial through-hole packaging suitable for identical PCB footprints and mounting procedures.

Regulatory Compliance: The 1N5337BRLG carries ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements. The original CZ5337B TR does not specify these certifications.

Thermal Performance: Operating temperature range is identical (-65°C to 200°C), ensuring equivalent thermal performance across all application environments.

Frequently Asked Questions (FAQ)

Q: Can the 1N5337BRLG directly replace the CZ5337B TR without circuit modification?

A: Yes. The 1N5337BRLG meets all electrical and mechanical specifications of the CZ5337B TR. No circuit modifications are required. Both devices function identically as 4.7 V, 5 W Zener diodes with ±5% tolerance and identical forward voltage characteristics.

Q: What is the significance of the lower reverse leakage current in the 1N5337BRLG?

A: The 1N5337BRLG exhibits 5 µA reverse leakage at 1 V compared to 10 µA for the CZ5337B TR. This represents improved performance and lower standby current consumption. The difference remains within acceptable engineering tolerances and does not affect substitution eligibility.

Q: Are the axial packages physically identical?

A: Both devices use axial through-hole packaging. The CZ5337B TR is specified as DO-201AA/DO-27, while the 1N5337BRLG is specified as T-18 axial. These designations refer to the same physical form factor suitable for identical PCB mounting holes and lead spacing.

Q: Does the ROHS3 compliance of the 1N5337BRLG affect compatibility?

A: No. ROHS3 compliance indicates enhanced environmental and regulatory adherence. This certification does not alter electrical or mechanical function and represents an advantage for applications subject to environmental regulations.

Q: What is the base product number relationship?

A: The 1N5337BRLG carries base product number 1N5337, which is the industry-standard designation for 4.7 V, 5 W Zener diodes. This standardization supports long-term availability and cross-manufacturer recognition.

Q: Is inventory availability a factor in substitution selection?

A: Yes. The CZ5337B TR is obsolete with limited remaining stock (781 pieces). The 1N5337BRLG is active production with 8200 pieces in inventory, ensuring reliable supply for current and future applications.