USB50815C-A/TR13 Equivalent & Substitute Parts

Part Overview

The USB50815C-A/TR13 is a 15V Workload Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology. This bidirectional, 2-channel TVS device provides transient protection for Ethernet applications in an 8-SOIC surface mount package. The part is currently Active in product status with 1097 units available in inventory. Substitute parts are identified when component availability changes, procurement lead times extend, or when design requirements permit equivalent electrical specifications.

Substiute Parts

USB50815C-A/TR13

Microchip TechnologyIn Stock: 1192USB50815C-A/TR13 Datasheet

Current PartRFQ

CDNBS08-T15C

Bourns Inc.In Stock: 17467CDNBS08-T15C Datasheet

SimilarRFQ

SMDA15C.TBT

Semtech CorporationIn Stock: 65490SMDA15C.TBT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the USB50815C-A/TR13 are identified based on the following electrical and mechanical criteria:

• Voltage - Reverse Standoff (Typ): 15V nominal, allowing substitutes with 15V operation
• Voltage - Breakdown (Min): 16.7V minimum threshold for activation
• Package / Case: 8-SOIC surface mount form factor with 0.154" (3.90mm) width
• Mounting Type: Surface mount configuration
• Operating Temperature Range: -55°C to 150°C (TJ)
• Bidirectional Channels: Electrical functionality with 2 or more channels
• Type: Zener-based TVS diode technology

The substitute parts identified—CDNBS08-T15C and SMDA15C.TBT—meet these criteria with allowable variations in clamping voltage (30V typical vs. 32V max), peak pulse current (10A to 17A vs. 5A), and capacitance characteristics. All substitutes maintain the same voltage standoff and breakdown specifications within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

USB50815C-A/TR13 (Microchip Technology): This part carries RoHS non-compliant status and is suitable for applications where RoHS compliance is not required. Product status is Active with 1097 units available.

CDNBS08-T15C (Bourns Inc.): This substitute provides ROHS3 compliance and offers the highest peak pulse current rating (17A) among the three options. Operating temperature range extends to 150°C (TJ), matching the main part. It features 4 bidirectional channels and the same 8-SOIC package footprint. Inventory availability is 17,425 units.

SMDA15C.TBT (Semtech Corporation): This substitute provides ROHS3 compliance with moderate peak pulse current (10A) and operates to 125°C (TJ). It features 4 bidirectional channels in the SMDAC series. This part has the highest inventory availability at 65,400 units. Operating temperature maximum is 25°C lower than the main part.

Selection between substitutes depends on compliance requirements, operating temperature constraints, and available inventory. All three parts share the same reverse standoff voltage, breakdown voltage, and 8-SOIC package form factor.

Frequently Asked Questions (FAQ)

Q: Can CDNBS08-T15C be used as a direct replacement for USB50815C-A/TR13?

A: Electrical substitution is permitted where the 30V typical clamping voltage (vs. 32V maximum) and higher peak pulse current (17A vs. 5A) are within design margins. Package compatibility (8-SOIC, 0.154" width) is identical. Design verification is required to confirm clamping voltage tolerance is acceptable for the target application.

Q: What is the primary difference between SMDA15C.TBT and the other substitutes?

A: The SMDA15C.TBT operates to a maximum junction temperature of 125°C, compared to 150°C for the main part and CDNBS08-T15C. Peak pulse power rating is 300W (vs. 500W for the others). These differences require verification against application thermal and power dissipation requirements.

Q: Are all substitutes in the same 8-SOIC package?

A: Yes. All three parts use 8-SOIC (0.154", 3.90mm Width) surface mount packages with identical footprints, permitting board-level interchange without layout modification.

Q: What is the significance of bidirectional channel count differences (2 vs. 4)?

A: The main part provides 2 channels, while substitutes provide 4 channels. Higher channel count provides additional protection paths but does not prevent backward compatibility for 2-channel applications.

Q: How do capacitance differences affect Ethernet protection performance?

A: Capacitance values at 1MHz differ significantly: main part is 3pF, CDNBS08-T15C is 80pF, and SMDA15C.TBT is 75pF. Lower capacitance may be preferred for high-speed signal integrity; higher capacitance may improve transient energy absorption. Application circuit analysis is required to determine acceptable values.

Q: Which substitute has the best availability?

A: SMDA15C.TBT has the highest inventory with 65,400 units available. CDNBS08-T15C has 17,425 units, and the main part has 1,097 units.