CZ5337D TR Equivalent & Substitute Parts

Part Overview

The CZ5337D TR is a 4.7 V, 5 W Zener diode manufactured by Central Semiconductor Corp in a through-hole DO-201 axial package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement. The part operates across a temperature range of -65°C to 200°C and features ±1% voltage tolerance with a maximum impedance of 2 Ohms.

Substiute Parts

CZ5337D TR

Central Semiconductor CorpIn Stock: 857CZ5337D TR Datasheet

Current PartRFQ

1N5337BRLG

onsemiIn Stock: 82661N5337BRLG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZ5337D TR is based on the following critical parameters that must remain constant or within acceptable engineering tolerances:

Primary Matching Criteria:

• Zener voltage: 4.7 V nominal
• Power dissipation rating: 5 W
• Mounting type: Through Hole
• Package configuration: Axial

Secondary Compatibility Parameters:

• Maximum impedance: 2 Ohms
• Operating temperature range: -65°C to 200°C minimum
• Forward voltage: 1.2 V maximum @ 1 A

The substitute part 1N5337BRLG meets all primary criteria and maintains compatibility across secondary parameters. Tolerance variation (±1% to ±5%) represents an acceptable engineering trade-off given the active product status and improved availability of the substitute.

Parameter Comparison

Engineering Selection Recommendations

The 1N5337BRLG manufactured by onsemi is the qualified substitute for the obsolete CZ5337D TR. Selection is based on the following factors:

Product Status: The CZ5337D TR is obsolete, while 1N5337BRLG maintains active product status with 8200 units in stock, ensuring long-term availability and supply chain continuity.

Compliance & Certifications: The 1N5337BRLG is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

Electrical Compatibility: All critical electrical parameters match or exceed the original specification. The reverse leakage current of 1N5337BRLG (5 µA @ 1 V) is superior to the original (10 µA @ 1 V), representing improved performance characteristics.

Mechanical Compatibility: Both parts utilize axial through-hole mounting with compatible package dimensions (DO-201AA/DO-27 versus T-18 axial), allowing direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5337BRLG directly replace the CZ5337D TR in existing designs?

A: Yes. Both components share identical zener voltage (4.7 V), power rating (5 W), impedance (2 Ohms), forward voltage (1.2 V @ 1 A), and operating temperature range (-65°C to 200°C). Axial through-hole mounting is compatible between both parts.

Q: What is the significance of the tolerance difference (±1% versus ±5%)?

A: The CZ5337D TR specifies ±1% tolerance, while 1N5337BRLG specifies ±5%. In applications requiring tighter voltage regulation, the ±5% tolerance of the substitute remains within acceptable engineering margins for most zener diode applications. Circuit design should account for this tolerance band.

Q: Why is the reverse leakage current lower in the substitute part?

A: The 1N5337BRLG exhibits 5 µA @ 1 V reverse leakage compared to 10 µA @ 1 V in the original. This represents improved device characteristics and does not affect substitution compatibility. Lower leakage current is beneficial for circuit performance.

Q: Are there any packaging considerations for board assembly?

A: Both parts use axial through-hole packages (DO-201AA/DO-27 for CZ5337D TR and T-18 for 1N5337BRLG). Physical dimensions are compatible for standard through-hole PCB assembly. Verify lead spacing and hole diameter specifications for your specific PCB design.

Q: What is the moisture sensitivity level for the substitute part?

A: The 1N5337BRLG is classified as Not Applicable for moisture sensitivity level (MSL), indicating no moisture-related handling restrictions. The original CZ5337D TR specifies MSL 1 (Unlimited). Both classifications permit standard storage and handling procedures.

Q: Is the substitute part suitable for high-temperature applications?

A: Yes. The 1N5337BRLG maintains the full operating temperature range of -65°C to 200°C, identical to the original CZ5337D TR, supporting applications across the complete specified thermal envelope.