RSB6.8CST2RA Equivalent & Substitute Parts

Part Overview

The RSB6.8CST2RA is a Transient Voltage Suppressor (TVS) diode manufactured by Rohm Semiconductor, designed for general-purpose overvoltage protection applications. This surface-mount component operates across a temperature range of -55°C to 150°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently in active production status with substantial inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this TVS diode category.

Substiute Parts

RSB6.8CST2RA

Rohm SemiconductorIn Stock: 125349RSB6.8CST2RA Datasheet

Current PartRFQ

VS5V0BB1EST15R

Rohm SemiconductorIn Stock: 9875VS5V0BB1EST15R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by the following critical parameters:

• Bidirectional Channels: Must equal 1 (single channel protection)
• Mounting Type: Must be Surface Mount to ensure PCB compatibility
• RoHS Status: Must maintain ROHS3 Compliant certification
• Moisture Sensitivity Level: Must be rated at MSL 1 (Unlimited)
• Operating Temperature Range: Must support -55°C ~ 150°C (TJ) minimum
• Manufacturer: Rohm Semiconductor (same manufacturer ensures design consistency)
• TVS Diode Type: Must be Zener-type for equivalent protection characteristics

The substitute part VS5V0BB1EST15R meets all mandatory substitution criteria while operating within the allowed electrical parameter envelope for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the RSB6.8CST2RA and VS5V0BB1EST15R are active production components manufactured by Rohm Semiconductor with ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts depends on application-specific voltage and power requirements:

• RSB6.8CST2RA is specified for applications requiring a 4.6V reverse standoff voltage with 10W peak pulse power dissipation in a compact VMN2 (SOD-923) package.
• VS5V0BB1EST15R is specified for applications requiring a 5V reverse standoff voltage with higher power handling capability (25W peak pulse) in a 0603 metric package footprint.

Both components maintain identical operating temperature ranges and compliance certifications, ensuring regulatory and thermal performance equivalence. Package selection must align with PCB layout constraints and thermal management requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can VS5V0BB1EST15R directly replace RSB6.8CST2RA on an existing PCB?

A: Direct PCB replacement is not possible due to different package footprints. RSB6.8CST2RA uses VMN2 (SOD-923) packaging, while VS5V0BB1EST15R uses 0603 metric (DSN0603-2) packaging. PCB layout modification is required.

Q: What is the primary electrical difference between these two TVS diodes?

A: The reverse standoff voltage differs: RSB6.8CST2RA operates at 4.6V, while VS5V0BB1EST15R operates at 5V. VS5V0BB1EST15R also provides higher peak pulse power dissipation (25W versus 10W).

Q: Are both parts suitable for the same application voltage range?

A: No. These parts are designed for different voltage protection levels. RSB6.8CST2RA protects circuits operating at lower voltages (4.6V standoff), while VS5V0BB1EST15R protects circuits at higher voltages (5V standoff). Application voltage requirements determine which part is appropriate.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings and operate across the identical temperature range (-55°C ~ 150°C TJ).

Q: What factors should determine part selection between these two options?

A: Selection is based on: (1) required reverse standoff voltage for your circuit protection level, (2) available PCB footprint space for the package type, and (3) peak pulse power dissipation requirements of the application.