SMBJ5344B/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ5344B/TR13 is a surface mount Zener diode rated at 8.2 V nominal voltage with 5 W maximum power dissipation. Manufactured by Microchip Technology, this component is packaged in DO-214AA (SMB) format and supplied on tape and reel. The part is currently active in production with 1016 units in stock.

Equivalent and substitute parts are identified to address supply chain requirements, inventory availability, or specific application constraints. Alternative sources for this Zener diode specification are available from qualified manufacturers with comparable electrical and mechanical characteristics.

Substiute Parts

SMBJ5344B/TR13

Microchip TechnologyIn Stock: 1080SMBJ5344B/TR13 Datasheet

Current PartRFQ

SMBJ5344B-TP

Micro Commercial CoIn Stock: 6315SMBJ5344B-TP Datasheet

DirectRFQ

CZRB5344B-HF

Comchip TechnologyIn Stock: 2879CZRB5344B-HF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ5344B/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Zener (Nominal): 8.2 V
• Tolerance: ±5%
• Power - Maximum: 5 W
• Impedance (Maximum): 1.5 Ohms
• Current - Reverse Leakage @ Vr: 10 µA
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

• Operating Temperature Range: Minimum operating temperature may vary between -65°C and -55°C; maximum remains 150°C
• Voltage - Forward (Maximum) @ If: Forward voltage specifications may differ based on measurement current (1 A, 1 mA, or 200 mA)
• Current - Reverse Leakage measurement voltage: May be specified at 5.9 V or 6.2 V

Two substitute parts meet these criteria: SMBJ5344B-TP (Micro Commercial Co) and CZRB5344B-HF (Comchip Technology).

Parameter Comparison

Engineering Selection Recommendations

SMBJ5344B/TR13 (Microchip Technology)

This is the primary part specification. It operates across the widest temperature range (-65°C to 150°C) and is currently active in production with 1016 units available. The part is RoHS non-compliant, which may be a consideration for applications subject to RoHS directives.

SMBJ5344B-TP (Micro Commercial Co)

This substitute is functionally equivalent with identical electrical specifications for Zener voltage, tolerance, power rating, and impedance. The operating temperature range is -55°C to 150°C, which is narrower at the low end. This part is ROHS3 compliant and has higher inventory availability (6300 units). Selection of this substitute is appropriate when RoHS compliance is required or when the -55°C minimum temperature is acceptable for the application.

CZRB5344B-HF (Comchip Technology)

This substitute is functionally equivalent with identical electrical specifications for Zener voltage, tolerance, power rating, and impedance. The operating temperature range is -55°C to 150°C. This part is ROHS3 compliant with 2869 units in stock. Selection of this substitute is appropriate when RoHS compliance is required or when the -55°C minimum temperature is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ5344B-TP and CZRB5344B-HF be used interchangeably with SMBJ5344B/TR13?

A: Both substitute parts are electrically equivalent for the critical parameters: 8.2 V nominal Zener voltage, ±5% tolerance, 5 W maximum power, and 1.5 Ohms maximum impedance. Both are packaged in DO-214AA (SMB) surface mount format. The primary differences are operating temperature range (minimum -55°C versus -65°C) and RoHS compliance status. Interchangeability depends on application temperature requirements and regulatory compliance needs.

Q: What is the difference in forward voltage specifications between the three parts?

A: Forward voltage is specified at different measurement currents: SMBJ5344B/TR13 at 1 A, SMBJ5344B-TP at 1 mA, and CZRB5344B-HF at 200 mA. All three specify a maximum of 1.2 V at their respective measurement points. These differences reflect different test conditions and do not affect functional equivalence for typical circuit applications.

Q: Does the reverse leakage current measurement voltage difference affect substitution?

A: Reverse leakage current is specified at 10 µA for all three parts. The measurement voltage differs slightly (5.9 V for SMBJ5344B/TR13 versus 6.2 V for the substitutes), but this variation is within normal manufacturing specification ranges and does not affect functional equivalence.

Q: Which substitute should be selected if the application requires operation below -55°C?

A: The SMBJ5344B/TR13 (Microchip) is the only part specified for operation down to -65°C. If the application requires this extended low-temperature range, the original part must be used. Both substitutes are rated to -55°C minimum.

Q: Are there RoHS compliance implications when substituting parts?

A: The original SMBJ5344B/TR13 is RoHS non-compliant. Both substitutes (SMBJ5344B-TP and CZRB5344B-HF) are ROHS3 compliant. If the application or end product is subject to RoHS directives, either substitute is appropriate. If RoHS compliance is not required, all three parts are functionally equivalent.

Q: Is the DO-214AA package identical across all three parts?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package. They are mechanically and electrically compatible for PCB assembly and circuit integration.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.