STTH2R02Q Equivalent & Substitute Parts

Part Overview

The STTH2R02Q is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 2 A average rectified current in a through-hole DO-15 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode features fast recovery characteristics with a reverse recovery time of 30 ns and operates at a maximum junction temperature of 175°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	3	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STTH2R02Q is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 2 A (or higher)
Mounting Type: Through Hole
Package / Case: DO-15 or DO-204AC (axial configuration)

Technology Compatibility:

Technology: Standard rectifier diode
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (>500ns)

Compliance Requirements:

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Substitute parts are grouped into two categories: direct equivalents matching all electrical specifications, and functional alternatives with higher current ratings or different recovery characteristics that maintain voltage and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Product Status
STTH2R02Q	STMicroelectronics	200	2	1 @ 2 A	Fast Recovery ≤ 500ns	30	3 @ 200 V	DO-15	Obsolete
STTH3R02QRL	STMicroelectronics	200	3	1 @ 3 A	Fast Recovery ≤ 500ns	30	3 @ 200 V	DO-15	Active
EGP20D	onsemi	200	2	0.95 @ 2 A	Fast Recovery ≤ 500ns	50	5 @ 200 V	DO-15	Not For New Designs
EGP20D-E3/54	Vishay General Semiconductor - Diodes Division	200	2	0.95 @ 2 A	Fast Recovery ≤ 500ns	50	5 @ 200 V	DO-204AC (DO-15)	Active
EGP20D-E3/73	Vishay General Semiconductor - Diodes Division	200	2	0.95 @ 2 A	Fast Recovery ≤ 500ns	50	5 @ 200 V	DO-204AC (DO-15)	Active
FR203GP-AP	Micro Commercial Co	200	2	1.3 @ 2 A	Fast Recovery ≤ 500ns	150	5 @ 200 V	DO-15	Active
GPP20D-E3/54	Vishay General Semiconductor - Diodes Division	200	2	1.1 @ 2 A	Standard Recovery >500ns	—	5 @ 200 V	DO-204AC (DO-15)	Active
SF24G-BP	Micro Commercial Co	200	2	0.95 @ 2 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	DO-15	Active
SF24G-TP	Micro Commercial Co	200	2	0.95 @ 2 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	DO-15	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended for Obsolete Part Replacement):

The EGP20D-E3/73 and EGP20D-E3/54 from Vishay General Semiconductor are active production parts with identical voltage and current ratings to the STTH2R02Q. Both are ROHS3 compliant and REACH unaffected. The EGP20D-E3/73 is available in higher quantity (3900 pcs) and carries the SUPERECTIFIER® series designation. These parts are suitable for direct substitution in applications where the 30 ns reverse recovery time of the original part is not a critical design constraint.

Higher Current Alternative:

The STTH3R02QRL from STMicroelectronics is an active production part with identical voltage rating and fast recovery characteristics. It provides 3 A average rectified current, exceeding the 2 A requirement of the STTH2R02Q. This part maintains the same 30 ns reverse recovery time and 175°C maximum junction temperature. It is suitable for applications requiring current margin or future design upgrades.

Fast Recovery Alternatives:

The SF24G-TP and SF24G-BP from Micro Commercial Co provide fast recovery characteristics (35 ns trr) with identical voltage and current ratings. Both are active production parts with ROHS3 compliance. The SF24G-TP is available in higher quantity (4809 pcs) in cut tape packaging.

Standard Recovery Alternative:

The GPP20D-E3/54 from Vishay General Semiconductor is an active production part with standard recovery characteristics (>500ns). This part is suitable for applications where fast recovery is not required and where lower switching losses are acceptable.

Not Recommended for New Designs:

The EGP20D from onsemi carries a "Not For New Designs" product status and should not be selected for new applications despite electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the STTH3R02QRL be used as a direct replacement for the STTH2R02Q?

A: The STTH3R02QRL is electrically compatible with the STTH2R02Q for voltage and package specifications. The 3 A rating exceeds the 2 A requirement, providing additional current capacity. Both parts share identical fast recovery characteristics (30 ns trr) and maximum junction temperature (175°C). Substitution is valid from an electrical standpoint, though circuit design should confirm that the higher current rating does not introduce unintended circuit behavior.

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

A: Fast recovery diodes have reverse recovery times of 500 ns or less, while standard recovery diodes exceed 500 ns. The STTH2R02Q features fast recovery (30 ns trr). Substitute parts like the GPP20D-E3/54 use standard recovery technology. Fast recovery diodes are preferred in high-frequency switching applications to minimize switching losses. Standard recovery diodes are suitable for lower-frequency rectification where recovery time is not a limiting factor.

Q: Are the DO-15 and DO-204AC packages interchangeable?

A: The DO-15 and DO-204AC are equivalent axial through-hole packages for diodes. Parts specified as DO-204AC (DO-15) or DO-15 are mechanically and electrically interchangeable in through-hole PCB designs. Verify PCB footprint compatibility before substitution.

Q: Why do some substitute parts have higher reverse leakage current (5 µA vs. 3 µA)?

A: Reverse leakage current specifications vary by manufacturer and device technology. The STTH2R02Q specifies 3 µA at 200 V, while most substitute parts specify 5 µA at 200 V. Both values are within acceptable ranges for general-purpose rectification. Applications sensitive to leakage current should verify that the higher leakage of substitute parts does not exceed circuit requirements.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 2011/65/EU, which restricts the use of specific hazardous materials in electrical and electronic equipment. All listed substitute parts are ROHS3 compliant, ensuring compatibility with environmental and regulatory requirements.

Q: Can I use the SF24G-BP (bulk packaging) in production environments?

A: The SF24G-BP is supplied in bulk packaging, which is suitable for high-volume manufacturing environments with automated handling systems. For lower-volume applications or manual assembly, the SF24G-TP (cut tape) or EGP20D-E3/73 (cut tape) packaging options are more practical.

Q: What is the significance of the REACH Unaffected status?

A: REACH Unaffected status indicates that the part is not subject to the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) regulation. All listed substitute parts carry this status, confirming compliance with European chemical safety requirements.

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