SMBJ5346C/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ5346C/TR13 is a Zener diode rated at 9.1 V nominal with 5 W maximum power dissipation, manufactured by Microchip Technology. This surface mount component operates across a temperature range of -65°C to 150°C and is supplied in tape and reel packaging with DO-214AA (SMB) case format. The part is currently active in production with 968 pieces available in new original stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative compliance certifications are required.

Substiute Parts

SMBJ5346C/TR13

Microchip TechnologyIn Stock: 1050SMBJ5346C/TR13 Datasheet

Current PartRFQ

CZRB5346B-HF

Comchip TechnologyIn Stock: 15016CZRB5346B-HF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ5346C/TR13 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Zener voltage nominal rating: 9.1 V
• Maximum power dissipation: 5 W
• Package format: DO-214AA (SMB) surface mount
• Mounting type: Surface mount
• Moisture sensitivity level: 1 (Unlimited)

Allowable Variation Parameters:

• Voltage tolerance: ±2% (main part) to ±5% (substitute part) — wider tolerance is acceptable in substitution
• Operating temperature range: -65°C to 150°C (main part) to -55°C to 150°C (substitute part) — narrower range is acceptable if application requirements are met
• Impedance (Maximum): 2 Ohms (equivalent across parts)
• Reverse leakage current: 7.5 µA specification maintained
• Forward voltage: 1.2 V maximum (equivalent across parts)

The CZRB5346B-HF from Comchip Technology qualifies as a direct substitute based on matching nominal zener voltage, power rating, package format, and surface mount configuration. Tolerance and temperature range variations are within acceptable substitution parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

SMBJ5346C/TR13 (Microchip Technology):

• Primary selection for applications requiring RoHS non-compliant component status
• Tighter voltage tolerance (±2%) suitable for precision voltage regulation circuits
• Extended lower operating temperature limit (-65°C) for extreme cold environment applications
• Current inventory: 968 pieces

CZRB5346B-HF (Comchip Technology):

• Recommended for applications requiring ROHS3 compliance certification
• Wider voltage tolerance (±5%) acceptable for general-purpose voltage regulation and protection circuits
• Operating temperature range (-55°C to 150°C) suitable for standard industrial and commercial applications
• Higher inventory availability: 14,999 pieces
• Both parts maintain REACH Unaffected and EAR99 ECCN classifications

Selection between these parts depends on compliance requirements and application temperature specifications. Both parts are active products with equivalent electrical performance in the 9.1 V, 5 W zener diode category.

Frequently Asked Questions (FAQ)

Q: Can CZRB5346B-HF replace SMBJ5346C/TR13 in existing designs?

A: Yes. Both parts share identical nominal zener voltage (9.1 V), maximum power rating (5 W), package format (DO-214AA/SMB), and surface mount configuration. The CZRB5346B-HF operates across -55°C to 150°C, which covers standard industrial temperature ranges. Applications requiring operation below -55°C must retain the SMBJ5346C/TR13. The ±5% tolerance of the substitute part is acceptable for voltage regulation and protection applications where ±2% tolerance is not explicitly required.

Q: What is the impact of voltage tolerance differences?

A: The SMBJ5346C/TR13 specifies ±2% tolerance, while CZRB5346B-HF specifies ±5% tolerance. For a 9.1 V nominal rating, this represents a maximum deviation of ±0.182 V (main part) versus ±0.455 V (substitute part). Applications with strict voltage regulation requirements should verify that the wider tolerance of the substitute part remains within circuit specifications.

Q: Are the packages physically identical?

A: Yes. Both parts use the DO-214AA (SMB) surface mount package format. PCB footprints, reflow soldering profiles, and pick-and-place equipment compatibility are identical. No layout or assembly modifications are required when substituting between these parts.

Q: What compliance differences exist between these parts?

A: The SMBJ5346C/TR13 is RoHS non-compliant, while CZRB5346B-HF is ROHS3 compliant. Both parts are REACH Unaffected and classified as EAR99 for export control purposes. Design compliance requirements determine which part is appropriate for your application.

Q: How do reverse leakage specifications compare?

A: Both parts specify 7.5 µA reverse leakage current. The SMBJ5346C/TR13 measures this at 6.6 V, while CZRB5346B-HF measures at 6.9 V. This minor measurement voltage difference does not affect functional equivalence for leakage performance.

Q: What is the moisture sensitivity classification?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special desiccant or humidity control requirements.