SVC272-TL-E Equivalent & Substitute Parts

Part Overview

The SVC272-TL-E is a varactor diode manufactured by onsemi, configured as a 1 Pair Common Cathode device in Surface Mount packaging. This component is classified as Obsolete, making identification of suitable equivalent parts essential for ongoing design support and production continuity. Varactor diodes are voltage-dependent capacitors used in tuning circuits, frequency modulation, and impedance matching applications where capacitance variation with reverse bias voltage is required.

Substiute Parts

SVC272-TL-E

onsemiIn Stock: 15898SVC272-TL-E Datasheet

Current PartRFQ

BB914

Infineon TechnologiesIn Stock: 4215BB914 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SVC272-TL-E is determined by the following critical parameters:

• Diode Configuration: 1 Pair Common Cathode topology must be maintained
• Package Compatibility: Surface Mount packages in SC-70, SOT-323, or equivalent footprints
• Capacitance Characteristics: Capacitance value at 8V, 1MHz and capacitance ratio (C2/C8) must fall within acceptable operating ranges for the application circuit
• Voltage Rating: Peak reverse voltage must meet or exceed 16 V
• Quality Factor (Q): High Q at operating frequencies ensures low loss performance
• Temperature Range: Operating temperature capability must support the application environment
• Compliance: RoHS and REACH compliance status for regulatory requirements

The BB914 from Infineon Technologies meets these substitution criteria through equivalent electrical performance and compatible Surface Mount packaging.

Parameter Comparison

Engineering Selection Recommendations

The BB914 is a direct functional equivalent for the SVC272-TL-E based on the following factors:

• Configuration Match: Both devices are 1 Pair Common Cathode varactors in Surface Mount packages, ensuring pin-compatible or footprint-compatible placement
• Electrical Performance: The BB914 provides capacitance characteristics (19.75 pF @ 8V, 1MHz) within typical tolerance bands of the SVC272-TL-E (18.55 pF), with a comparable capacitance ratio of 2.42 versus 2.3
• Voltage Headroom: The BB914's 18 V peak reverse voltage rating exceeds the SVC272-TL-E's 16 V rating, providing additional design margin
• Active Product Status: The BB914 is currently in active production, ensuring long-term availability and supply chain continuity
• Temperature Range: The BB914 supports the full operating range of the SVC272-TL-E with extended low-temperature capability (-55°C to 125°C)
• Compliance: Both devices carry EAR99 ECCN classification and share the same HTSUS code (8541.10.0070)

Frequently Asked Questions (FAQ)

Q: Can the BB914 be used as a direct replacement for the SVC272-TL-E without circuit modification?

A: The BB914 is functionally equivalent in terms of diode configuration, capacitance characteristics, and voltage rating. However, package footprints must be verified. The SVC272-TL-E uses SC-70/SOT-323 packaging, while the BB914 uses TO-236-3/SC-59/SOT-23-3 packaging. These packages have different pin spacing and land patterns. PCB layout adjustment may be required, or a package adapter may be used if space permits.

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

A: The capacitance ratio (C2/C8) indicates the tuning range of the varactor diode—the ratio of capacitance at 2V to capacitance at 8V. The SVC272-TL-E has a ratio of 2.3, while the BB914 has 2.42. This difference of approximately 5% is within typical circuit tolerance and does not prevent substitution in most applications. Circuit simulation or bench testing is recommended for frequency-critical applications.

Q: Why is the SVC272-TL-E listed as Obsolete?

A: Obsolete status indicates that the manufacturer (onsemi) has discontinued production and support for this part. The BB914 from Infineon Technologies is an active product with ongoing manufacturing and supply chain support, making it the preferred choice for new designs and production continuity.

Q: Are there any compliance differences between the two parts?

A: Both parts carry EAR99 ECCN classification and share the same HTSUS commodity code. The SVC272-TL-E is explicitly ROHS3 compliant with MSL Level 1. The BB914's RoHS compliance status is not specified in the provided data. Verification with the supplier is recommended if RoHS certification is a requirement for your application.

Q: What should be considered when switching from SVC272-TL-E to BB914 in production?

A: Primary considerations are package footprint compatibility, PCB layout modifications, and electrical performance validation. The BB914's slightly higher capacitance (19.75 pF vs. 18.55 pF) and capacitance ratio (2.42 vs. 2.3) should be evaluated in circuit simulation. Thermal management and moisture sensitivity (both devices are MSL Level 1 or equivalent) must be maintained during assembly and storage.