STTH1L06RL Equivalent & Substitute Parts

Part Overview

The STTH1L06RL is a general-purpose fast recovery rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole axial package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications (voltage rating, current rating, recovery time characteristics) and compatible mechanical packaging within the through-hole diode category. Alternative sources become necessary for supply chain continuity, inventory availability, or design flexibility across multiple qualified manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	80	ns
Current - Reverse Leakage @ Vr	1	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the STTH1L06RL are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 1 A minimum
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial compatible

Acceptable Parameter Variations:

Reverse Recovery Time (trr): 50 ns to 250 ns (all within fast recovery classification)
Voltage - Forward (Vf) (Max) @ If: 1.2 V to 1.3 V @ 1 A (minor forward voltage tolerance)
Current - Reverse Leakage @ Vr: 1 µA to 5 µA @ 600 V (within acceptable leakage limits)
Operating Temperature - Junction: -55°C to -65°C minimum; 150°C to 175°C maximum (all support industrial applications)

Compliance Requirements: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, ensuring regulatory equivalence.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	trr [ns]	Ir @ Vr [µA @ V]	Package	Tj (Max) [°C]	Product Status
STTH1L06RL	STMicroelectronics	600	1	1.3 @ 1	80	1 @ 600	DO-41	175	Active
STTH1L06	STMicroelectronics	600	1	1.3 @ 1	80	1 @ 600	DO-41	175	Active
1N4937-T	Diodes Incorporated	600	1	1.2 @ 1	200	5 @ 600	DO-41	150	Active
1N4937G	Taiwan Semiconductor Corporation	600	1	1.2 @ 1	200	5 @ 600	DO-204AL (DO-41)	150	Active
MUR160G	onsemi	600	1	1.25 @ 1	75	5 @ 600	Axial	175	Active
MUR160K_AY_00001	Panjit International Inc.	600	1	1.25 @ 1	50	5 @ 600	DO-41	175	Active
MUR160RLG	onsemi	600	1	1.25 @ 1	75	5 @ 600	Axial	175	Active
RGP10J	onsemi	600	1	1.3 @ 1	250	5 @ 600	DO-41	175	Not For New Designs

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): STTH1L06 (STMicroelectronics) is the parametric equivalent to STTH1L06RL, offering identical electrical specifications and the same DO-41 package. This part is suitable for direct substitution with no design modifications required.

Active Substitute Parts (Qualified Alternatives): The following parts are Active product status and meet all core electrical and mechanical requirements:

1N4937-T (Diodes Incorporated): Meets voltage and current ratings with slightly lower forward voltage (1.2 V vs. 1.3 V). Reverse recovery time of 200 ns remains within fast recovery classification. Operating temperature maximum of 150°C is acceptable for most industrial applications.
1N4937G (Taiwan Semiconductor Corporation): Functionally equivalent to 1N4937-T with identical electrical performance. Package designation DO-204AL (DO-41) confirms mechanical compatibility.
MUR160G (onsemi): SWITCHMODE™ series part with superior reverse recovery time (75 ns). Axial package format is mechanically compatible with DO-41 footprints in through-hole applications. Operating temperature range extends to 175°C.
MUR160K_AY_00001 (Panjit International Inc.): Offers fastest reverse recovery time (50 ns) among all substitutes, supporting high-frequency switching applications. DO-41 package ensures direct mechanical compatibility.
MUR160RLG (onsemi): SWITCHMODE™ series with 75 ns reverse recovery time and highest inventory availability (95,200 pcs). Axial package is mechanically compatible. Operating temperature range -65°C to 175°C supports extended temperature applications.

Legacy Part (Not Recommended for New Designs): RGP10J (onsemi) carries "Not For New Designs" product status. While electrically qualified, this part should not be selected for new circuit designs. Existing designs using RGP10J may continue to source this part for maintenance and repair applications.

Compliance Verification: All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence to the STTH1L06RL.

Frequently Asked Questions (FAQ)

Q: Can STTH1L06 be used as a direct replacement for STTH1L06RL?

A: Yes. STTH1L06 is the parametric equivalent with identical voltage rating (600 V), current rating (1 A), forward voltage (1.3 V @ 1 A), reverse recovery time (80 ns), and reverse leakage current (1 µA @ 600 V). Both use DO-41 packaging. No design modifications are required.

Q: What is the difference between DO-41 and Axial package designations?

A: DO-41 and Axial refer to the same through-hole package format for diodes. DO-41 is the JEDEC designation; Axial describes the physical form factor (leads extending from opposite ends of the component body). These terms are interchangeable for PCB mounting compatibility.

Q: Why do some substitute parts have higher reverse recovery times (200 ns vs. 80 ns)?

A: All substitute parts meet the fast recovery classification (≤ 500ns, > 200mA). Reverse recovery time variations (50 ns to 250 ns) reflect different semiconductor manufacturing processes and design optimizations. Parts with shorter recovery times (50–75 ns) are preferred for high-frequency switching applications; parts with longer recovery times (200–250 ns) are suitable for standard rectification circuits. Selection depends on circuit switching frequency requirements.

Q: Are there inventory differences between substitute parts?

A: Yes. Inventory levels vary significantly: MUR160RLG has 95,200 pcs available, while 1N4937G has 2,015 pcs. For high-volume production, MUR160RLG or MUR160K_AY_00001 offer superior availability. For lower-volume applications, all listed parts maintain adequate stock levels.

Q: Can I use RGP10J in a new design?

A: No. RGP10J carries "Not For New Designs" product status. This designation indicates the manufacturer has discontinued active support for new applications. RGP10J is reserved for maintenance and repair of existing equipment. For new designs, select from Active status parts: STTH1L06, 1N4937-T, 1N4937G, MUR160G, MUR160K_AY_00001, or MUR160RLG.

Q: What is the maximum operating temperature difference between substitute parts?

A: Operating temperature ranges vary. STTH1L06RL and most substitutes support 175°C maximum junction temperature. However, 1N4937-T and 1N4937G are rated to 150°C maximum. For applications requiring extended temperature operation above 150°C, select parts rated to 175°C: STTH1L06, MUR160G, MUR160K_AY_00001, MUR160RLG, or RGP10J.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and REACH unaffected status, ensuring regulatory equivalence to the STTH1L06RL for use in restricted substance directive applications.

Q: Which substitute part offers the best performance for high-frequency switching circuits?

A: MUR160K_AY_00001 (Panjit International Inc.) offers the fastest reverse recovery time at 50 ns, followed by MUR160G and MUR160RLG at 75 ns. These parts are optimized for high-frequency rectification and switching power supply applications. The STTH1L06RL and STTH1L06 at 80 ns are also suitable for high-frequency use.

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