2M27Z B0G Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M27Z B0G is a 27 V, 2 W Zener diode manufactured by Taiwan Semiconductor Corporation in DO-204AC (DO-15) axial through-hole packaging. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. The part maintains ROHS3 compliance and operates across an industrial temperature range of -55°C to 175°C.

Substiute Parts

2M27Z B0G

Taiwan Semiconductor CorporationIn Stock: 12772M27Z B0G Datasheet

Current PartRFQ

2M27Z A0G

Taiwan Semiconductor CorporationIn Stock: 11602M27Z A0G Datasheet

DirectRFQ

1N5361B-TP

Micro Commercial CoIn Stock: 291041N5361B-TP Datasheet

SimilarRFQ

3EZ27D5-TP

Micro Commercial CoIn Stock: 9153EZ27D5-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2M27Z B0G is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 27 V nominal
• Tolerance: ±5%
• Reverse leakage current: 500 nA @ 20.6 V
• Mounting type: Through Hole
• Package compatibility: DO-204AC / DO-15 axial

Secondary Consideration:

• Power rating: The original part specifies 2 W maximum. Substitute parts with equal or higher power ratings are functionally compatible, as they maintain the same voltage regulation characteristics while providing additional thermal margin.

Compliance Requirements:

• RoHS3 compliance
• Operating temperature range compatibility

The substitute parts identified below satisfy all primary matching criteria. Variations in power rating and impedance reflect different manufacturer designs while maintaining electrical equivalence for the specified 27 V zener voltage application.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The 2M27Z A0G is the direct equivalent to the 2M27Z B0G. Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications, including 27 V nominal zener voltage, 2 W power rating, 18 Ohm maximum impedance, and -55°C to 175°C operating temperature range. The 2M27Z A0G maintains active product status and ROHS3 compliance. This part is the preferred substitute when design specifications require exact parameter matching and extended temperature operation to 175°C.

Higher Power Alternatives:

The 1N5361B-TP (5 W) and 3EZ27D5-TP (3 W) are functionally compatible substitutes manufactured by Micro Commercial Co. Both maintain the 27 V nominal zener voltage, ±5% tolerance, and 500 nA reverse leakage current. These parts provide increased power dissipation capability and lower impedance characteristics. The operating temperature range for both alternatives is -55°C to 150°C, which is suitable for applications not requiring the extended upper temperature limit of the original part. Both alternatives are in active production status with ROHS3 compliance.

Selection Criteria:

• Use 2M27Z A0G for direct replacement requiring identical specifications and extended temperature operation
• Use 1N5361B-TP or 3EZ27D5-TP when higher power dissipation or lower impedance is beneficial to circuit performance
• All substitutes maintain compliance certifications and through-hole axial packaging compatibility

Frequently Asked Questions (FAQ)

Q: Can the 2M27Z A0G directly replace the 2M27Z B0G?

A: Yes. The 2M27Z A0G is a direct equivalent with identical electrical specifications, including 27 V zener voltage, 2 W power rating, 18 Ohm impedance, and -55°C to 175°C operating temperature. The only difference is product status; the A0G variant is currently active.

Q: What is the difference between the 2 W original part and the 5 W 1N5361B-TP substitute?

A: The 1N5361B-TP provides higher power dissipation capability (5 W versus 2 W) and lower impedance (5 Ohms versus 18 Ohms). Both maintain the same 27 V zener voltage and ±5% tolerance. The higher power rating allows greater thermal margin in applications with higher current demands. The operating temperature maximum is 150°C instead of 175°C.

Q: Are all substitute parts compatible with DO-15 axial through-hole PCB layouts?

A: Yes. All substitute parts listed use DO-204AC / DO-15 axial packaging and are compatible with existing through-hole PCB designs for the 2M27Z B0G.

Q: What is the significance of the impedance difference between parts?

A: Impedance affects voltage regulation stability under load changes. Lower impedance (1N5361B-TP at 5 Ohms) provides better voltage regulation with faster response to load transients. Higher impedance (2M27Z B0G at 18 Ohms) is acceptable for applications with slower load changes. The choice depends on circuit requirements, not part interchangeability.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 2M27Z B0G.

Q: What is the impact of the 25°C difference in maximum operating temperature?

A: The 1N5361B-TP and 3EZ27D5-TP operate to 150°C maximum, while the 2M27Z B0G and 2M27Z A0G operate to 175°C. For applications with ambient temperatures or junction temperatures exceeding 150°C, the original or direct equivalent (2M27Z A0G) is required. For applications operating below 150°C, all parts are suitable.

Q: Can the 3EZ27D5-TP (3 W) be used instead of the 1N5361B-TP (5 W)?

A: Yes. Both parts maintain 27 V zener voltage and ±5% tolerance. The 3EZ27D5-TP provides 3 W power rating with 10 Ohm impedance, offering a middle ground between the original 2 W specification and the higher 5 W rating. Selection depends on circuit power dissipation requirements.