Equivalent & Substitute Parts for SMDB15CE3/TR7

Part Overview

The SMDB15CE3/TR7 is an active production transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This bidirectional 4-channel Zener diode operates with a 15V reverse standoff voltage and 24V maximum clamping voltage, rated for 5A peak pulse current in 8/20µs waveforms. The component is housed in an 8-SOIC surface mount package and is ROHS3 compliant with MSL Level 1. Alternative equivalent and substitute parts are necessary to support procurement flexibility, manage inventory lead times, and provide options when the primary part becomes unavailable from distribution channels.

Substiute Parts

SMDB15CE3/TR7

Microchip TechnologyIn Stock: 760SMDB15CE3/TR7 Datasheet

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SMDA15CE3/TR7

Microchip TechnologyIn Stock: 1680SMDA15CE3/TR7 Datasheet

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CDNBS08-T15C

Bourns Inc.In Stock: 17467CDNBS08-T15C Datasheet

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SMDA15C.TBT

Semtech CorporationIn Stock: 65490SMDA15C.TBT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment across the following critical parameters: reverse standoff voltage (15V), breakdown voltage minimum (16.7V), bidirectional 4-channel configuration, 8-SOIC surface mount package, operating temperature range compatibility, and RoHS3 compliance. Acceptable substitutes must maintain the same package footprint to ensure mechanical and electrical compatibility without PCB redesign.

The substitute parts listed below are grouped into two categories: direct equivalents with identical or superior electrical specifications, and compatible alternatives with enhanced performance margins. The SMDA15CE3/TR7 represents a direct electrical equivalent from Microchip Technology with the same clamping voltage (24V) and peak pulse current rating (5A). The CDNBS08-T15C and SMDA15C.TBT are compatible alternatives with higher clamping voltage tolerances and peak pulse ratings that provide enhanced overvoltage protection margin while maintaining the same standoff and breakdown voltage thresholds.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts meet active product status requirements and ROHS3 compliance specifications. The SMDA15CE3/TR7 represents the primary direct equivalent, offering identical electrical performance characteristics and manufacturing continuity within Microchip Technology's TVSarray™ series.

The CDNBS08-T15C from Bourns Inc. and SMDA15C.TBT from Semtech Corporation are classified as compatible alternatives suitable for applications requiring enhanced transient protection margins. These alternatives accommodate higher peak pulse currents (17A and 10A respectively versus 5A) and elevated clamping voltage specifications (30V versus 24V), making them appropriate for designs where additional overvoltage suppression headroom is beneficial.

Selection between direct and compatible alternatives depends on application requirements: direct equivalents are preferred for drop-in replacement scenarios, while compatible alternatives provide design flexibility when higher current or voltage margin requirements exist. All parts maintain identical package geometry and surface mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMDA15CE3/TR7 directly replace SMDB15CE3/TR7 without PCB modifications? A: Yes. SMDA15CE3/TR7 is a direct equivalent with identical electrical specifications and 8-SOIC package dimensions, requiring no circuit board redesign.

Q: Are CDNBS08-T15C and SMDA15C.TBT suitable for the same applications as SMDB15CE3/TR7? A: Yes, both parts are compatible substitutes. They maintain the same 15V reverse standoff voltage and 16.7V breakdown voltage minimum. The higher clamping voltage (30V) and peak pulse current ratings provide extended operating margins, making them suitable for equivalent or more demanding protection applications.

Q: What are the key compatibility criteria for substitute selection? A: Substitutes must maintain matching reverse standoff voltage (15V), breakdown voltage minimum (16.7V), bidirectional 4-channel configuration, 8-SOIC surface mount package footprint, and RoHS3 compliance. Operating temperature range must support the target application requirements.

Q: Does package footprint differ between SMDB15CE3/TR7 and the listed substitutes? A: No. All listed parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB land pattern compatibility and mechanical fit without modification.

Q: Are there operating temperature limitations when substituting with SMDA15C.TBT? A: SMDA15C.TBT specifies a maximum junction temperature of 125°C compared to 150°C for SMDB15CE3/TR7. Applications operating near the upper thermal limit should verify compatibility with the lower specification.

Q: How do the capacitance specifications differ between parts? A: Capacitance at 1MHz ranges from 70pF (SMDB15CE3/TR7 and SMDA15CE3/TR7) to 80pF (CDNBS08-T15C) to 75pF (SMDA15C.TBT). These minimal differences have negligible impact on circuit performance in typical TVS applications.