STPR820D Equivalent & Substitute Parts

Part Overview

The STPR820D is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 8 A average rectified current in a TO-220AC through-hole package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility while meeting current product availability and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 16 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	50	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the STPR820D are qualified based on the following mandatory electrical and mechanical parameters:

Primary Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 8 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: TO-220-2

Secondary Compatibility Criteria:

Reverse Recovery Time (trr): ≤ 35 ns
Current - Reverse Leakage @ Vr: ≤ 50 µA @ 200 V
Voltage - Forward (Vf) (Max): ≤ 1.25 V

Substitute parts are classified as direct or similar based on alignment with these parameters. All listed substitutes meet the primary criteria. Variations in forward voltage, reverse leakage current, and reverse recovery time remain within acceptable operating ranges for general-purpose rectification applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Package
STPR820D	STMicroelectronics	Obsolete	200	8	1.25 @ 16 A	30	50 @ 200 V	150	TO-220-2
STTH802D	STMicroelectronics	Active	200	8	1.05 @ 8 A	30	6 @ 200 V	175	TO-220-2
BYW29E-200,127	WeEn Semiconductors	Active	200	8	1.05 @ 8 A	25	10 @ 200 V	150	TO-220-2
BYW80-200G	onsemi	Active	200	8	1.25 @ 22 A	35	10 @ 200 V	175	TO-220-2
MUR820-BP	Micro Commercial Co	Active	200	8	0.975 @ 8 A	35	5 @ 200 V	150	TO-220-2
MUR820G	onsemi	Active	200	8	0.975 @ 8 A	35	5 @ 200 V	175	TO-220-2
SDUR820	SMC Diode Solutions	Active	200	8	1.2 @ 8 A	35	5 @ 200 V	150	TO-220-2

Engineering Selection Recommendations

Direct Replacement (Preferred):

STTH802D is the recommended direct replacement for STPR820D. Both parts are manufactured by STMicroelectronics and share identical voltage and current ratings. STTH802D is active in production, offers improved forward voltage characteristics (1.05 V vs. 1.25 V), reduced reverse leakage current (6 µA vs. 50 µA), and an elevated maximum junction temperature (175°C vs. 150°C). ROHS3 compliance is maintained.

Alternative Substitutes (Active Status):

MUR820G and MUR820-BP provide functional equivalence with superior reverse leakage performance (5 µA). MUR820G supports extended junction temperature range (-65°C to 175°C) and is available in higher inventory quantities. Both maintain ROHS3 compliance and TO-220-2 packaging.

BYW29E-200,127 offers the fastest reverse recovery time (25 ns) and lowest forward voltage at rated current (1.05 V @ 8 A). REACH status is affected; verify regulatory requirements for end applications.

BYW80-200G provides extended operating temperature range (-65°C to 175°C) and is part of the onsemi SWITCHMODE™ series. Reverse recovery time is 35 ns, within acceptable limits.

SDUR820 maintains 200 V / 8 A ratings with low reverse leakage (5 µA) and forward voltage of 1.2 V @ 8 A. REACH status is affected.

Compliance Verification:

All substitute parts maintain ROHS3 compliance. Verify REACH status requirements for applications subject to REACH regulations. STTH802D and MUR820G are REACH unaffected; BYW29E-200,127 and SDUR820 are REACH affected.

Frequently Asked Questions (FAQ)

Q: Can STTH802D directly replace STPR820D without circuit modifications?

A: Yes. STTH802D meets all primary electrical and mechanical compatibility criteria. Forward voltage is lower (1.05 V vs. 1.25 V), resulting in reduced power dissipation. Reverse leakage current is significantly lower (6 µA vs. 50 µA). These characteristics represent improvements over the original part and do not require circuit redesign.

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

A: TO-220-2 and TO-220AC refer to the same physical package configuration with two leads. The designations are manufacturer-specific nomenclature for identical mechanical and electrical interfaces. All listed substitutes are mechanically compatible with STPR820D PCB layouts.

Q: Why do some substitutes have lower forward voltage than STPR820D?

A: Forward voltage variation reflects differences in semiconductor material quality, doping profiles, and manufacturing processes across manufacturers. Lower forward voltage (MUR820-BP at 0.975 V, STTH802D at 1.05 V) indicates improved efficiency and reduced thermal dissipation. All values remain within acceptable operating ranges for rectification circuits.

Q: Are there inventory considerations for substitute selection?

A: Yes. STTH802D has 13,877 units in stock; BYW29E-200,127 has 61,550 units; MUR820G has 17,140 units. Availability varies by distributor and lead time requirements. Verify current inventory status with component suppliers.

Q: What is reverse recovery time and why does it vary among substitutes?

A: Reverse recovery time (trr) is the interval required for a diode to transition from forward conduction to reverse blocking when the applied voltage reverses. STPR820D specifies 30 ns; substitutes range from 25 ns (BYW29E-200,127) to 35 ns (BYW80-200G, MUR820-BP, MUR820G, SDUR820). All values remain within the fast recovery classification (≤ 500 ns) and are suitable for general-purpose rectification.

Q: Which substitute offers the best thermal performance?

A: STTH802D and MUR820G both support maximum junction temperatures of 175°C, compared to 150°C for STPR820D. STTH802D additionally provides the lowest reverse leakage current (6 µA), reducing thermal generation from leakage paths. MUR820G supports the widest operating temperature range (-65°C to 175°C).

Q: Are REACH-affected parts acceptable for all applications?

A: REACH-affected status (BYW29E-200,127, SDUR820) indicates the part contains substances of very high concern (SVHC) on the REACH candidate list. Acceptability depends on end-product regulatory requirements and customer specifications. Verify compliance obligations before selection.

Q: Can multiple substitute parts be used interchangeably in production?

A: Yes, provided all substitutes meet the specified electrical and mechanical parameters for the application. However, production standardization on a single substitute part (STTH802D recommended) simplifies supply chain management, qualification testing, and long-term availability planning.

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