RSBC6.8CST2RA Equivalent & Substitute Parts

Part Overview

The RSBC6.8CST2RA is a Transient Voltage Suppressor (TVS) diode manufactured by Rohm Semiconductor, designed for general-purpose ESD and transient protection applications. This surface-mount component features a 4.6V reverse standoff voltage and operates in a compact VMN2 package. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for TVS diode applications, considering voltage ratings, clamping characteristics, and package compatibility.

Substiute Parts

RSBC6.8CST2RA

Rohm SemiconductorIn Stock: 2708RSBC6.8CST2RA Datasheet

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VS5V0BN1HST15R

Rohm SemiconductorIn Stock: 10773VS5V0BN1HST15R Datasheet

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PJSD05TM_R1_00001

Panjit International Inc.In Stock: 23864PJSD05TM_R1_00001 Datasheet

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SMAJ6.5CA

MDDIn Stock: 7328SMAJ6.5CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSBC6.8CST2RA are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Zener-type TVS diode topology
• Bidirectional or unidirectional channel configuration suitable for general-purpose protection
• Reverse standoff voltage within 4.6V to 5V range
• Breakdown voltage minimum between 6V and 7.22V
• Surface-mount packaging with compatible footprints
• Active product status with RoHS3 compliance

Allowed Parameter Variance:

• Reverse standoff voltage: ±1.5V from primary specification
• Breakdown voltage: ±0.62V from primary specification
• Clamping voltage: up to 18V maximum
• Peak pulse current: 2A to 35.7A range
• Operating temperature: -50°C to 150°C minimum range

The three substitute parts meet these criteria through equivalent voltage protection characteristics and surface-mount implementation, though with variations in package form factor and peak current handling capacity.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active product status and full RoHS3 compliance, ensuring long-term availability and regulatory alignment for industrial and commercial applications.

VS5V0BN1HST15R (Rohm Semiconductor): Maintains manufacturer consistency with the primary part while offering higher reverse standoff voltage (5V) and clamping capability (18V). The 0603 metric package provides compact board integration. Suitable for applications requiring higher transient energy absorption within the same manufacturer ecosystem.

PJSD05TM_R1_00001 (Panjit International Inc.): Offers intermediate voltage characteristics (5V standoff, 6.2V breakdown) with enhanced peak pulse current handling (5A) and moderate clamping voltage (12V). The SOD-923 package provides a different footprint option. Capacitance specification (35pF @ 1MHz) is provided for frequency-dependent circuit analysis.

SMAJ6.5CA (MDD): Delivers the highest peak pulse current capacity (35.7A) and power dissipation (400W) among substitute options, with elevated voltage ratings (6.5V standoff, 7.22V breakdown). The SMA (DO-214AC) package accommodates higher current applications. Suitable for high-energy transient protection scenarios.

Frequently Asked Questions (FAQ)

Q: Can RSBC6.8CST2RA be directly replaced with VS5V0BN1HST15R?

A: Direct replacement is possible if the application circuit tolerates the higher reverse standoff voltage (5V vs. 4.6V) and clamping voltage (18V). The 0603 metric package differs from the VMN2 package, requiring PCB layout verification. Both parts are Rohm Semiconductor products with identical compliance ratings.

Q: What is the primary difference between the three substitute parts?

A: The three substitutes differ in voltage ratings, peak pulse current capacity, and package form factor. VS5V0BN1HST15R prioritizes compact packaging with moderate current handling. PJSD05TM_R1_00001 provides mid-range specifications with capacitance data. SMAJ6.5CA is designed for high-current, high-energy transient suppression with the largest package footprint.

Q: Are package changes between RSBC6.8CST2RA and substitute parts critical?

A: Yes. The primary part uses VMN2 (2-SMD, Flat Lead), while substitutes use DSN0603-2, SOD-923, or SMA (DO-214AC) packages. Package selection affects PCB footprint, thermal performance, and current distribution. Verify board layout compatibility before substitution.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All four parts are RoHS3 compliant with MSL rating 1 (Unlimited), REACH unaffected status, and EAR99 ECCN classification. Regulatory and environmental requirements are equivalent across all options.

Q: Which substitute part handles the highest transient energy?

A: SMAJ6.5CA provides the highest peak pulse current (35.7A) and power dissipation (400W), making it suitable for applications requiring maximum transient energy absorption. This capability comes with higher voltage ratings and a larger package footprint.

Q: Can PJSD05TM_R1_00001 be used in high-frequency circuits?

A: PJSD05TM_R1_00001 includes capacitance specification (35pF @ 1MHz), enabling frequency-dependent circuit analysis. This data is not provided for other parts, making it the documented choice for frequency-sensitive applications within the substitute group.