RD2006LS-SB5 Equivalent & Substitute Parts

Part Overview

The RD2006LS-SB5 is a general-purpose rectifier diode manufactured by onsemi, rated for 20A average rectified current in a through-hole TO-220FI(LS)-SB package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure uninterrupted supply for applications requiring this diode's electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	RD2006LS-SB5
Manufacturer	onsemi
Category	Diodes, Rectifiers
Current - Average Rectified (Io)	20A
Voltage - Forward (Vf) (Max) @ If	1.75 V @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	100 µA @ 600 V
Mounting Type	Through Hole
Package / Case	TO-220-2 Full Pack
Operating Temperature - Junction (Max)	150°C
Product Status	Obsolete
Technology	Standard

Substitute Part Grouping Explanation

Substitute parts for the RD2006LS-SB5 are selected based on the following critical parameters that determine functional compatibility:

Primary Selection Criteria:

Current - Average Rectified (Io): 20A or higher
Mounting Type: Through Hole
Package / Case: TO-220-2 Full Pack or equivalent TO-220 variant
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: 150°C or higher

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed application requirements
Reverse Recovery Time (trr): Lower values indicate improved performance
Current - Reverse Leakage @ Vr: Lower values indicate improved performance

Substitute parts are grouped into two categories: Direct Current Rating Matches (20A rated) and Higher Current Capacity Alternatives (15A rated parts suitable for 20A applications with thermal margin). All substitute parts maintain fast recovery characteristics and through-hole mounting compatibility.

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vf (Max) @ If (V)	trr (ns)	Ir @ 600V (µA)	Tj (Max) (°C)	Package	Product Status
RD2006LS-SB5	onsemi	20	1.75 @ 20A	50	100 @ 600V	150	TO-220-2 Full Pack	Obsolete
RFNL20TJ6SGC9	Rohm Semiconductor	20	1.3 @ 20A	180	10 @ 600V	150	TO-220-2 Full Pack	Active
VS-E4TU2006FP-N3	Vishay General Semiconductor	20	1.63 @ 20A	61	15 @ 600V	175	TO-220-2 Full Pack	Active
RFV15TJ6SGC9	Rohm Semiconductor	15	2.8 @ 15A	50	10 @ 600V	150	TO-220-2 Full Pack	Active
STTH15AC06FP	STMicroelectronics	15	1.9 @ 15A	55	2 @ 600V	175	TO-220-2 Full Pack	Active
RFNL15TJ6SGC9	Rohm Semiconductor	15	1.3 @ 15A	160	10 @ 600V	150	TO-220-2 Full Pack	Active
RFV8TJ6SGC9	Rohm Semiconductor	8	2.8 @ 8A	45	10 @ 600V	150	TO-220-2 Full Pack	Active
RFVS8TJ6SGC9	Rohm Semiconductor	8	3.0 @ 8A	40	10 @ 600V	150	TO-220-2 Full Pack	Active
RFNL10TJ6SGC9	Rohm Semiconductor	10	1.3 @ 10A	150	10 @ 600V	150	TO-220-2	Active
RFNL5TJ6SGC9	Rohm Semiconductor	5	1.3 @ 5A	130	10 @ 600V	150	TO-220-2 Full Pack	Active
RFV12TJ6SGC9	Rohm Semiconductor	12	2.8 @ 12A	45	10 @ 600V	150	TO-220-2 Full Pack	Active

Engineering Selection Recommendations

Primary Substitutes (Direct 20A Rating Match):

The RFNL20TJ6SGC9 (Rohm Semiconductor) and VS-E4TU2006FP-N3 (Vishay General Semiconductor) are the recommended primary substitutes. Both parts maintain the 20A average rectified current rating and TO-220-2 Full Pack package configuration. The RFNL20TJ6SGC9 offers lower forward voltage (1.3 V @ 20A) compared to the original specification (1.75 V @ 20A), resulting in reduced power dissipation. The VS-E4TU2006FP-N3 provides a forward voltage (1.63 V @ 20A) closer to the original specification and features an extended operating temperature range to 175°C. Both parts are active products with ROHS3 compliance and REACH unaffected status.

Secondary Substitutes (15A Rating):

The RFV15TJ6SGC9, RFNL15TJ6SGC9, and STTH15AC06FP are suitable for applications where the 20A rating is not a strict requirement. These 15A-rated parts provide thermal margin in designs operating below maximum current capacity. The STTH15AC06FP (STMicroelectronics) offers the lowest reverse leakage current (2 µA @ 600V) and the highest operating temperature rating (175°C), making it suitable for demanding thermal environments.

Compliance and Availability:

All recommended substitute parts are active products with ROHS3 compliance and REACH unaffected status. The RD2006LS-SB5 is classified as obsolete; therefore, substitution is necessary for new procurement. Inventory availability is confirmed for all substitute parts listed.

Frequently Asked Questions (FAQ)

Q: Can the RFNL20TJ6SGC9 directly replace the RD2006LS-SB5?

A: Yes. The RFNL20TJ6SGC9 maintains the same 20A average rectified current rating, fast recovery speed classification, and TO-220-2 Full Pack package. The lower forward voltage (1.3 V @ 20A versus 1.75 V @ 20A) results in improved efficiency with no functional incompatibility.

Q: What is the difference between the RFNL series and RFV series Rohm diodes?

A: The RFNL series exhibits lower forward voltage characteristics (1.3 V typical), while the RFV series exhibits higher forward voltage characteristics (2.8 V to 3.0 V typical). Both series maintain fast recovery speed and are available in multiple current ratings. Selection depends on application power dissipation requirements.

Q: Can a 15A-rated diode substitute for a 20A-rated application?

A: A 15A-rated diode can substitute for a 20A-rated application only if the actual operating current does not exceed 15A. The 15A rating represents the maximum average rectified current specification. Applications requiring sustained 20A operation must use 20A-rated or higher parts.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time indicates the speed at which the diode transitions from conducting to blocking state. Lower trr values (40-50 ns) indicate faster switching, reducing switching losses in high-frequency applications. The RD2006LS-SB5 specifies 50 ns; substitute parts range from 40 ns to 180 ns depending on the specific model.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the difference between TO-220-2 and TO-220-2 Full Pack packaging?

A: Both designations refer to the same two-lead through-hole package in the TO-220 family. The "Full Pack" notation indicates the complete package configuration. All parts listed are mechanically compatible with standard TO-220 mounting hardware and PCB layouts.

Q: Why does the VS-E4TU2006FP-N3 have a higher operating temperature rating (175°C) than the original part (150°C)?

A: The VS-E4TU2006FP-N3 is manufactured by Vishay using different semiconductor materials and process technology compared to the onsemi RD2006LS-SB5. The higher junction temperature rating reflects the thermal capability of the specific die and package design, providing additional margin in high-temperature applications.

Q: Is the STTH15AC06FP suitable for the same applications as the RD2006LS-SB5?

A: The STTH15AC06FP is suitable for applications where the operating current does not exceed 15A. This part offers superior reverse leakage characteristics (2 µA @ 600V versus 100 µA @ 600V) and higher operating temperature capability (175°C), making it advantageous for precision and high-temperature designs operating below 15A.

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