BZD27C43P RTG Equivalent & Substitute Parts

Part Overview

The BZD27C43P RTG is a Zener diode rated at 43 V nominal voltage with 1 W maximum power dissipation, designed for surface mount applications in the Sub SMA package configuration. Manufactured by Taiwan Semiconductor Corporation, this component is classified as Active product status and is fully RoHS3 compliant.

Substitute parts become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or alternative packaging formats are required for manufacturing optimization. The parts listed below maintain electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

BZD27C43P RTG

Taiwan Semiconductor CorporationIn Stock: 1166BZD27C43P RTG Datasheet

Current PartRFQ

BZD27C43P

Taiwan Semiconductor CorporationIn Stock: 6378BZD27C43P Datasheet

Parametric EquivalentRFQ

BZD27C43P-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 20167BZD27C43P-E3-08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZD27C43P RTG is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Zener voltage (Vz) must equal 43 V nominal
• Maximum power dissipation must be ≥ 1 W
• Impedance (Zzt) must not exceed 45 Ohms
• Reverse leakage current must not exceed 1 µA @ 33 V
• Forward voltage must not exceed 1.2 V @ 200 mA
• Operating temperature range must encompass -55°C to 175°C minimum

Mechanical Compatibility Requirements:

• Package type must be DO-219AB (Sub SMA equivalent)
• Mounting type must be Surface Mount
• Compliance certifications must include RoHS3

Acceptable Variations:

• Tolerance on Zener voltage may vary (±5% to ±6.97%)
• Power rating may exceed 1 W (800 mW is acceptable as minimum threshold)
• Packaging format may differ (Tape & Reel vs. bulk) without affecting electrical function
• Manufacturer may differ provided all electrical and mechanical parameters align

Parameter Comparison

Engineering Selection Recommendations

BZD27C43P (Taiwan Semiconductor Corporation - Parametric Equivalent): This part maintains identical electrical specifications to the main part number with improved tolerance (±5% vs. ±6.97%). However, product status is classified as "Not For New Designs," limiting its application to legacy system maintenance and repair operations only. Current inventory of 6300 units is available in Tape & Reel packaging format.

BZD27C43P-E3-08 (Vishay General Semiconductor - Diodes Division): This part is classified as Active product status, making it suitable for new design implementations. The Vishay variant operates across an extended lower temperature range (-65°C vs. -55°C), providing enhanced performance margin in cold environment applications. Power rating is specified at 800 mW, which remains within acceptable substitution parameters for circuits designed around the 1 W specification. All electrical parameters including impedance, reverse leakage, and forward voltage match the main part exactly. Current inventory of 20100 units is available in DO-219AB (SMF) packaging.

For new designs, the Vishay BZD27C43P-E3-08 is the preferred selection due to Active product status and extended temperature range. For legacy system support, the Taiwan Semiconductor BZD27C43P remains available with improved tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can BZD27C43P-E3-08 replace BZD27C43P RTG in existing designs?

A: Yes. The BZD27C43P-E3-08 maintains all critical electrical parameters: 43 V nominal Zener voltage, 45 Ohms maximum impedance, 1 µA reverse leakage current, and 1.2 V forward voltage. The 800 mW power rating is acceptable for circuits designed around 1 W specifications. Both components use identical DO-219AB packaging and surface mount configuration.

Q: What is the significance of the ±5% tolerance on the parametric equivalent versus ±6.97% on the main part?

A: The ±5% tolerance on BZD27C43P provides tighter voltage regulation compared to the ±6.97% tolerance on BZD27C43P RTG. This represents improved manufacturing consistency and may provide better circuit performance in applications requiring precise voltage regulation. Both tolerances remain within acceptable substitution parameters.

Q: Why is the Taiwan Semiconductor BZD27C43P marked "Not For New Designs"?

A: Product status "Not For New Designs" indicates the manufacturer has discontinued active development and recommends alternative parts for new circuit implementations. This classification does not affect electrical performance but signals potential future availability constraints. This part remains suitable for maintenance and repair of existing systems.

Q: Does the extended temperature range of BZD27C43P-E3-08 (-65°C vs. -55°C) affect compatibility?

A: No. The extended lower temperature range of the Vishay part (-65°C to 175°C) is a superset of the main part's range (-55°C to 175°C). This provides additional operational margin in cold environment applications without compromising compatibility in standard temperature ranges.

Q: Are there packaging format differences between these parts?

A: The main part BZD27C43P RTG and parametric equivalent BZD27C43P are available in different supplier packaging formats (bulk vs. Tape & Reel). The Vishay BZD27C43P-E3-08 is supplied in DO-219AB (SMF) format. All three parts use identical DO-219AB component packaging, ensuring mechanical compatibility in PCB assembly processes.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for all variants, indicating no special moisture handling requirements during storage or assembly.