STTH3L06RL Equivalent & Substitute Parts

Part Overview

The STTH3L06RL is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This device features fast recovery characteristics with a reverse recovery time of 85 nanoseconds, making it suitable for standard rectification applications requiring rapid switching performance.

The STTH3L06RL is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications. Substitute diodes must maintain electrical compatibility across critical parameters including voltage rating, current capacity, recovery speed, and thermal characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	85	ns
Current - Reverse Leakage @ Vr	3	µA @ 600 V
Operating Temperature - Junction (Max)	175	°C
Mounting Type	Through Hole	-
Package / Case	DO-201AD, Axial	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the STTH3L06RL are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 3 A
Mounting Type: Through Hole
Package / Case: DO-201AD, Axial

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.3 V @ 3 A
Speed Classification: Fast Recovery ≤ 500ns or Standard Recovery > 500ns
Operating Temperature - Junction: ≥ 175°C preferred
RoHS Status: ROHS3 Compliant

Parametric Equivalent: STTH3L06 (STMicroelectronics) maintains identical electrical specifications with identical packaging but differs in product status (Active vs. Obsolete) and packaging format (Cut Tape vs. Tape & Reel).

Similar Substitutes: Parts including 1N5406-G, 1N5406G, 1N5406GP-AP, 1N5406GP-TP, and 1N5406RLG meet the 600 V / 3 A core requirements and DO-201AD axial package specification. These parts employ standard recovery technology (> 500ns) rather than fast recovery, resulting in different switching characteristics. Forward voltage and reverse leakage specifications vary within acceptable ranges for general-purpose rectification.

Partial Compatibility Parts: 1N5626-TAP (Avalanche technology, SOD-64 package) and 60S6-TP (6 A rating) meet voltage and current requirements but differ in technology classification or current rating. 1N6628 meets fast recovery and voltage specifications but is rated for 1.75 A, below the 3 A requirement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Package	Product Status
STTH3L06RL	STMicroelectronics	600	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	85	3 @ 600 V	175	DO-201AD	Obsolete
STTH3L06	STMicroelectronics	600	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	85	3 @ 600 V	175	DO-201AD	Active
1N5406-G	Comchip Technology	600	3	1 @ 3 A	Standard Recovery > 500ns	-	5 @ 600 V	125	DO-201AD	Active
1N5406G	Taiwan Semiconductor Corporation	600	3	1 @ 3 A	Standard Recovery > 500ns	-	5 @ 600 V	150	DO-201AD	Active
1N5406GP-AP	Micro Commercial Co	600	3	1.1 @ 3 A	Standard Recovery > 500ns	-	5 @ 600 V	150	DO-201AD	Active
1N5406GP-TP	Micro Commercial Co	600	3	1.1 @ 3 A	Standard Recovery > 500ns	-	5 @ 600 V	150	DO-201AD	Active
1N5406RLG	onsemi	600	3	1 @ 3 A	Standard Recovery > 500ns	-	10 @ 600 V	150	DO-201AD	Not For New Designs
1N5626-TAP	Vishay General Semiconductor - Diodes Division	600	3	1 @ 3 A	Standard Recovery > 500ns	7500	1 @ 200 V	175	SOD-64	Active
60S6-TP	Micro Commercial Co	600	6	1 @ 6 A	Standard Recovery > 500ns	-	5 @ 600 V	150	DO-201AD	Active

Engineering Selection Recommendations

Parametric Equivalent Selection:

STTH3L06 (STMicroelectronics, Active status) is the direct parametric equivalent to STTH3L06RL. This part maintains identical electrical specifications including 600 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, 85 nanosecond reverse recovery time, and 175°C maximum junction temperature. The primary difference is product status (Active vs. Obsolete) and packaging format (Cut Tape vs. Tape & Reel). STTH3L06 is ROHS3 compliant and REACH unaffected, matching the compliance profile of the original part. This substitution requires no circuit redesign and maintains full electrical compatibility.

Fast Recovery Technology Substitutes:

For applications requiring fast recovery characteristics (≤ 500ns reverse recovery time), STTH3L06 remains the only active substitute with identical specifications. 1N6628 (Microchip Technology) provides fast recovery performance but is rated for 1.75 A, below the 3 A requirement, and is therefore unsuitable for direct substitution in 3 A applications.

Standard Recovery Substitutes:

Parts including 1N5406-G (Comchip Technology), 1N5406G (Taiwan Semiconductor Corporation), 1N5406GP-AP (Micro Commercial Co), 1N5406GP-TP (Micro Commercial Co), and 1N5406RLG (onsemi) meet the 600 V / 3 A core electrical requirements and DO-201AD axial package specification. These parts employ standard recovery technology with reverse recovery times exceeding 500 nanoseconds. Forward voltage specifications range from 1.0 V to 1.1 V at 3 A, compared to 1.3 V for the STTH3L06RL. Reverse leakage current ranges from 5 µA to 10 µA at 600 V, compared to 3 µA for the original part. Maximum junction temperatures range from 125°C to 150°C, below the 175°C rating of STTH3L06RL. All listed standard recovery substitutes are ROHS3 compliant and REACH unaffected.

1N5406RLG carries a "Not For New Designs" product status designation, indicating this part is suitable for replacement and maintenance applications but not recommended for new circuit development.

Partial Compatibility Considerations:

1N5626-TAP (Vishay) meets 600 V / 3 A requirements and maintains 175°C maximum junction temperature but uses SOD-64 package instead of DO-201AD, requiring mechanical redesign. This part employs avalanche technology rather than standard rectifier technology.

60S6-TP (Micro Commercial Co) is rated for 6 A average rectified current, exceeding the 3 A requirement. This part is suitable for applications where higher current capacity is beneficial but is not a direct replacement for 3 A-rated circuits.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of STTH3L06RL. Moisture sensitivity level is classified as 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can STTH3L06 directly replace STTH3L06RL in existing designs?

A: Yes. STTH3L06 is the parametric equivalent with identical electrical specifications (600 V, 3 A, 1.3 V forward voltage, 85 ns reverse recovery time, 175°C junction temperature) and identical DO-201AD axial package. The only differences are product status (Active vs. Obsolete) and packaging format (Cut Tape vs. Tape & Reel). No circuit modifications are required.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have reverse recovery times of 500 nanoseconds or less, enabling rapid switching and reduced switching losses in high-frequency applications. Standard recovery diodes exceed 500 nanoseconds reverse recovery time and are suitable for lower-frequency rectification. STTH3L06RL employs fast recovery technology (85 ns), while 1N5406 series parts use standard recovery technology. Selection depends on circuit switching frequency requirements.

Q: Can I use 1N5406 series parts as substitutes for STTH3L06RL?

A: 1N5406 series parts (1N5406-G, 1N5406G, 1N5406GP-AP, 1N5406GP-TP) meet the 600 V / 3 A core requirements and use identical DO-201AD axial packaging. However, these parts employ standard recovery technology (> 500ns) rather than fast recovery (85 ns), resulting in different switching characteristics. Forward voltage is lower (1.0 to 1.1 V vs. 1.3 V), and maximum junction temperature is lower (125°C to 150°C vs. 175°C). These substitutes are suitable for general-purpose rectification applications but may not be appropriate for circuits designed specifically for fast recovery performance.

Q: What does "Not For New Designs" mean for 1N5406RLG?

A: "Not For New Designs" indicates the part is suitable for replacement, repair, and maintenance of existing equipment but is not recommended for incorporation into new circuit designs. This designation reflects the manufacturer's product lifecycle strategy. 1N5406RLG remains electrically compatible with STTH3L06RL for replacement applications.

Q: Why does 60S6-TP have a 6 A rating instead of 3 A?

A: 60S6-TP is rated for 6 A average rectified current, double the 3 A requirement of STTH3L06RL. This higher current rating makes 60S6-TP suitable for applications requiring greater current capacity. The part maintains 600 V reverse voltage and DO-201AD axial package compatibility. Use of a higher-rated diode in a 3 A circuit is acceptable from an electrical standpoint but may result in unnecessary cost and board space if the additional current capacity is not required.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, matching the regulatory profile of STTH3L06RL. All parts are also REACH unaffected, indicating no substances of very high concern (SVHC) are present above regulatory thresholds.

Q: What is the significance of moisture sensitivity level (MSL)?

A: Moisture sensitivity level (MSL) of 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. These parts do not require special moisture-controlled storage, handling, or baking procedures prior to assembly. This classification applies to all substitute parts listed in this reference.

Q: Can I use 1N5626-TAP as a substitute despite the different package?

A: 1N5626-TAP meets the 600 V / 3 A electrical requirements and maintains 175°C maximum junction temperature. However, this part uses SOD-64 package instead of DO-201AD, requiring mechanical redesign of the circuit board layout and component mounting. Additionally, 1N5626-TAP employs avalanche technology rather than standard rectifier technology. Substitution is possible only if circuit board redesign is acceptable and avalanche diode characteristics are compatible with the application.

Q: How do I select between multiple substitute options?

A: Selection depends on application requirements. For fast recovery performance and maximum thermal rating, use STTH3L06 (Active equivalent). For general-purpose rectification with standard recovery characteristics, use 1N5406 series parts (1N5406-G, 1N5406G, 1N5406GP-AP, 1N5406GP-TP). For applications requiring higher current capacity, use 60S6-TP. All substitutes maintain 600 V / 3 A core specifications and DO-201AD axial packaging except 1N5626-TAP (SOD-64 package). Verify that forward voltage, reverse recovery time, and maximum junction temperature specifications are compatible with circuit design requirements.

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