Equivalent & Substitute Parts for RS3BC-HF

Part Overview

The RS3BC-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-214AB surface mount package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility across multiple qualified suppliers is required for production continuity.

Substiute Parts

RS3BC-HF

Comchip TechnologyIn Stock: 668RS3BC-HF Datasheet

Current PartRFQ

RS3B R7G

Taiwan Semiconductor CorporationIn Stock: 1282RS3B R7G Datasheet

Parametric EquivalentRFQ

RS3B V7G

Taiwan Semiconductor CorporationIn Stock: 2175RS3B V7G Datasheet

Parametric EquivalentRFQ

RS3B-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 30373RS3B-E3/57T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RS3BC-HF are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 100 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Reverse Recovery Time (trr): 150 ns
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -55°C to 150°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All three substitute parts listed (RS3B R7G, RS3B V7G, and RS3B-E3/57T) meet these mandatory electrical and mechanical parameters, enabling direct functional substitution in applications requiring a 100 V, 3 A fast recovery rectifier diode in DO-214AB surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: RS3BC-HF (Comchip Technology)

The RS3BC-HF maintains Active product status with 642 units in stock. This part is the baseline specification and should be selected when available to ensure continuity with original design validation.

Secondary Selection: RS3B-E3/57T (Vishay General Semiconductor - Diodes Division)

The RS3B-E3/57T is recommended as the primary substitute due to Active product status and the highest inventory availability (30,300 units). This part is manufactured by Vishay, a major semiconductor supplier with established quality and reliability standards. All critical electrical parameters match the RS3BC-HF specification. The forward voltage specification is measured at 2.5 A rather than 3 A, which represents a conservative rating within the application envelope. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment.

Tertiary Selection: RS3B R7G and RS3B V7G (Taiwan Semiconductor Corporation)

Both TSC parts (RS3B R7G and RS3B V7G) are electrically equivalent to the RS3BC-HF and carry ROHS3 compliance. However, both are marked as Discontinued at DiGi Electronics, indicating reduced long-term availability. These parts should be considered only when the primary and secondary options are unavailable. The RS3B V7G offers higher inventory (2,111 units) compared to RS3B R7G (1,218 units) and includes Digi-Reel® packaging option alongside Cut Tape format.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes and long-term storage requirements.

Frequently Asked Questions (FAQ)

Q: Can RS3B-E3/57T be used as a direct replacement for RS3BC-HF?

A: Yes. The RS3B-E3/57T meets all mandatory electrical parameters: 100 V reverse voltage, 3 A average rectified current, 150 ns reverse recovery time, and identical DO-214AB surface mount packaging. Both parts are ROHS3 compliant with MSL 1 rating. The forward voltage specification difference (measured at 2.5 A versus 3 A) does not prevent substitution, as the 1.3 V maximum rating applies within the operating range.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape wound on a reel, suitable for high-volume automated assembly. Cut Tape packaging is supplied in shorter tape segments, typically used for lower-volume orders or manual assembly. Both formats contain the same component; the difference is in supply format and handling. The RS3BC-HF is supplied in Tape & Reel format, while all substitute parts are supplied in Cut Tape or Cut Tape with Digi-Reel® options.

Q: Why do some substitute parts show higher reverse leakage current (10 µA versus 5 µA)?

A: The RS3BC-HF specifies 5 µA reverse leakage at 100 V, while substitute parts specify 10 µA at the same voltage. Both values are within acceptable limits for general-purpose rectifier applications. The higher leakage in substitute parts does not affect functional performance in standard power supply and rectification circuits. This parameter difference is typical across different manufacturers' product lines for the same voltage and current class.

Q: Are the TSC parts (RS3B R7G and RS3B V7G) still available for new designs?

A: Both TSC parts are marked as Discontinued at DiGi Electronics, indicating they are no longer actively stocked by this distributor. While inventory may exist through other channels, these parts should not be selected for new designs requiring long-term supply assurance. The RS3B-E3/57T (Vishay) or RS3BC-HF (Comchip) are preferred for new applications.

Q: What does ROHS3 compliance mean for this diode?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting the use of lead, cadmium, mercury, hexavalent chromium, and certain brominated flame retardants. All listed parts carry this certification, confirming suitability for applications requiring environmental compliance in EU and equivalent markets.

Q: Can packaging format affect circuit performance?

A: No. Packaging format (Tape & Reel versus Cut Tape) affects supply logistics and assembly handling only. The electrical and thermal performance of the diode component itself is identical regardless of packaging format. Circuit performance depends on the component's electrical specifications, which are equivalent across all listed parts.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. These parts can be stored indefinitely without special humidity control and do not require baking before reflow soldering. This classification simplifies inventory management and assembly processes compared to higher MSL ratings.