2M19Z B0G Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M19Z B0G is a 19 V, 2 W Zener diode manufactured by Taiwan Semiconductor Corporation, housed in a DO-204AC (DO-15) axial through-hole package. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Alternative parts may be required due to inventory constraints, lead time considerations, or specific application requirements within the allowable electrical and mechanical parameter ranges.

Substiute Parts

2M19Z B0G

Taiwan Semiconductor CorporationIn Stock: 10662M19Z B0G Datasheet

Current PartRFQ

1N5355B-TP

Micro Commercial CoIn Stock: 56661N5355B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2M19Z B0G is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating within the application tolerance band
• Power dissipation capability sufficient for circuit requirements
• Reverse leakage current characteristics compatible with circuit operation
• Impedance values within acceptable limits for the intended function
• Operating temperature range encompassing the application environment

Mechanical Compatibility Criteria:

• Through-hole mounting type
• DO-15 axial package configuration
• Physical dimensions compatible with existing PCB layouts

Regulatory & Compliance Criteria:

• RoHS3 compliance status
• REACH compliance status
• Moisture sensitivity level rating

The substitute part 1N5355B-TP meets the mechanical packaging requirements (DO-15 axial through-hole) and regulatory compliance standards. However, electrical parameters differ in zener voltage (18 V nominal versus 19 V), power rating (5 W versus 2 W), and impedance characteristics (2.5 Ohms versus 11 Ohms). These differences must be evaluated against specific circuit requirements before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The 2M19Z B0G remains the specified component for applications requiring a 19 V nominal zener voltage with 2 W power dissipation in a DO-15 axial package. This part is active, in stock with 968 units available, and carries full RoHS3 and REACH compliance certifications.

Substitute Part Consideration: The 1N5355B-TP is an alternative zener diode in the same DO-15 axial package format with equivalent RoHS3 and REACH compliance. This substitute exhibits higher power dissipation capability (5 W versus 2 W) and lower impedance (2.5 Ohms versus 11 Ohms), but operates at a nominal zener voltage of 18 V and a reduced maximum operating temperature of 150°C compared to 175°C for the main part. The 1N5355B-TP is available in higher inventory (5645 units) and supplied in cut tape packaging.

Compliance Status: Both parts satisfy RoHS3 compliance requirements, REACH unaffected status, and unlimited moisture sensitivity ratings, making either suitable for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5355B-TP directly replace the 2M19Z B0G in all applications?

A: Direct substitution depends on circuit tolerance for zener voltage variation. The 1N5355B-TP operates at 18 V nominal (±5% tolerance) versus 19 V nominal (±5% tolerance) for the 2M19Z B0G. Applications requiring precise 19 V regulation may not accept an 18 V substitute. The lower maximum operating temperature (150°C versus 175°C) must also be evaluated against thermal requirements.

Q: Are the physical packages identical?

A: Both parts use the DO-15 axial through-hole package configuration. The 2M19Z B0G is specified as DO-204AC (DO-15), while the 1N5355B-TP is specified as DO-15. These designations refer to the same physical package standard, ensuring mechanical compatibility for PCB mounting.

Q: What is the significance of the impedance difference?

A: The 2M19Z B0G has a maximum impedance of 11 Ohms, while the 1N5355B-TP has 2.5 Ohms. Lower impedance in the 1N5355B-TP results in better voltage regulation characteristics and faster transient response. Applications sensitive to impedance performance should account for this parameter difference.

Q: Does the higher power rating of the 1N5355B-TP affect compatibility?

A: The 1N5355B-TP's 5 W rating exceeds the 2 W requirement of the 2M19Z B0G. Higher power capability does not create incompatibility; it provides additional thermal margin. However, the substitute must still operate within the circuit's voltage and current specifications.

Q: Are both parts RoHS3 compliant?

A: Yes, both the 2M19Z B0G and 1N5355B-TP carry RoHS3 compliance certification and REACH unaffected status, making either suitable for regulated electronic equipment applications.

Q: What is the reverse leakage current difference?

A: Both parts specify 500 nA reverse leakage current, measured at different reference voltages (14.4 V for the 2M19Z B0G and 13.7 V for the 1N5355B-TP). This parameter indicates minimal difference in leakage characteristics between the two devices.