Equivalent & Substitute Parts for BB535E7908HTSA1

Part Overview

The BB535E7908HTSA1 is a varactor diode manufactured by Infineon Technologies, designed for 30 V applications in surface mount configurations. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Varactor diodes function as voltage-controlled capacitors, with capacitance varying inversely with applied reverse voltage. The BB535E7908HTSA1 operates across a temperature range of -55°C to 150°C and is housed in the SC-76 SOD-323 package.

Substiute Parts

BB535E7908HTSA1

Infineon TechnologiesIn Stock: 857BB535E7908HTSA1 Datasheet

Current PartRFQ

BB535E7904HTSA1

Infineon TechnologiesIn Stock: 14319BB535E7904HTSA1 Datasheet

DirectRFQ

BB131,115

NXP SemiconductorsIn Stock: 13105BB131,115 Datasheet

MFR RecommendedRFQ

BB135,115

NXP USA Inc.In Stock: 4793BB135,115 Datasheet

MFR RecommendedRFQ

BB170X

NXP USA Inc.In Stock: 6269BB170X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of varactor diodes is determined by the following critical parameters:

• Package compatibility: All substitutes must use SC-76 SOD-323 surface mount packaging
• Voltage rating: All substitutes must support 30 V peak reverse voltage
• Diode configuration: All substitutes must be single diode types
• Capacitance characteristics: Substitutes must operate within acceptable capacitance ranges at specified bias voltages
• Temperature range: Operating temperature must meet or exceed the application requirements

The substitute parts identified for BB535E7908HTSA1 are grouped into two categories: direct manufacturer variants and cross-manufacturer alternatives. Direct variants maintain identical electrical characteristics and packaging from the same manufacturer. Cross-manufacturer alternatives provide equivalent functional performance with comparable capacitance and voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

BB535E7904HTSA1 (Infineon Technologies): This direct variant maintains identical electrical specifications and temperature range to the original part. It carries ROHS3 compliance and is available in higher inventory quantities. However, it is classified as "Not For New Designs," limiting its suitability for new product development.

BB135,115 (NXP USA Inc.): This substitute offers the closest capacitance match (2.1 pF @ 28V) to the original part and is the only active product among the alternatives. It provides ROHS3 compliance and unlimited moisture sensitivity rating. The operating temperature range is reduced to -55°C to 125°C, which may be a limiting factor for high-temperature applications.

BB170X (NXP USA Inc.): This alternative provides slightly elevated capacitance (2.75 pF @ 28V) and maintains active product status with ROHS3 compliance. It is suitable for applications where the higher capacitance value is acceptable within circuit design tolerances.

BB131,115 (NXP Semiconductors): This substitute exhibits significantly lower capacitance (1.055 pF @ 28V) and is classified as obsolete with RoHS non-compliance. It is not recommended for new applications or designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BB535E7904HTSA1 be used as a direct replacement for BB535E7908HTSA1?

A: Yes. Both parts share identical electrical specifications, including 2.3 pF capacitance at 28V and 30 V peak reverse voltage. Both operate across -55°C to 150°C. The primary difference is product status; BB535E7904HTSA1 is classified as "Not For New Designs," making it suitable for maintenance and legacy system support only.

Q: What is the capacitance difference between BB135,115 and the original BB535E7908HTSA1?

A: BB135,115 has a capacitance of 2.1 pF at 28V compared to 2.3 pF for BB535E7908HTSA1. This 0.2 pF difference represents approximately 8.7% variation and may be acceptable depending on circuit tuning requirements and design tolerances.

Q: Are all substitute parts available in the same package?

A: Yes. All identified substitutes use the SC-76 SOD-323 surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: Which substitute is recommended for new product designs?

A: BB135,115 is the only active product among the substitutes and carries ROHS3 compliance. It is the appropriate choice for new designs requiring regulatory compliance and long-term availability assurance.

Q: Does the reduced operating temperature range of NXP substitutes affect compatibility?

A: NXP alternatives operate to 125°C maximum junction temperature, compared to 150°C for the Infineon original. Applications requiring operation above 125°C must use BB535E7904HTSA1 or verify that circuit design does not exceed this thermal limit.

Q: What is the significance of the capacitance ratio parameter?

A: The capacitance ratio indicates the tuning range of the varactor diode. BB535E7908HTSA1 has a ratio of 9.8 (C1/C28), while NXP alternatives use different measurement conditions (C0.5/C28). These ratios define the voltage-dependent capacitance variation and affect circuit tuning characteristics.