STTH208RL Equivalent & Substitute Parts

Part Overview

The STTH208RL is a general-purpose rectifier diode rated for 800 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. Manufactured by STMicroelectronics, this component features fast recovery characteristics with a reverse recovery time of 75 ns and forward voltage of 1.65 V at 2 A. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain identical electrical specifications, while substitute parts offer functional alternatives with allowable parameter variations within acceptable engineering tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.65 @ 2 A	V
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5 @ 800 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
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 STTH208RL is determined by the following critical parameters: reverse voltage rating (Vr), average rectified current (Io), forward voltage (Vf), reverse recovery time (trr), and package compatibility. Parts are classified into two categories:

Parametric Equivalents maintain all electrical specifications within the same tolerance band and are direct replacements without circuit redesign.

Similar Substitutes are grouped by functional capability and may exhibit variations in one or more parameters. Substitution is valid when:

Reverse voltage rating equals or exceeds 800 V
Average rectified current rating equals or exceeds 2 A
Package type is DO-15 or DO-204AC (axial through-hole)
Forward voltage and recovery time remain within acceptable circuit operating margins
Operating temperature range accommodates application requirements

Parts with higher voltage ratings (1000 V) are acceptable substitutes for 800 V applications. Parts with lower current ratings (1 A) are not suitable for 2 A applications. Recovery speed classification changes from fast recovery to standard recovery require circuit evaluation but do not preclude substitution in non-critical switching applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Speed	Package	Status
STTH208RL	STMicroelectronics	800	2	1.65 @ 2 A	75	5 @ 800 V	Fast Recovery ≤ 500ns	DO-15	Obsolete
STTH208	STMicroelectronics	800	2	1.65 @ 2 A	75	5 @ 800 V	Fast Recovery ≤ 500ns	DO-15	Active
1N5621GP-E3/54	Vishay General Semiconductor	800	1	1.2 @ 1 A	300	0.5 @ 800 V	Fast Recovery ≤ 500ns	DO-204AC (DO-15)	Active
EGP20K	Nexperia USA Inc.	800	2	1.7 @ 2 A	75	5 @ 800 V	Fast Recovery ≤ 500ns	DO-15	Obsolete
FR206GP-AP	Micro Commercial Co	800	2	1.3 @ 2 A	500	5 @ 800 V	Fast Recovery ≤ 500ns	DO-15	Active
FR206GP-TP	Micro Commercial Co	800	2	1.3 @ 2 A	500	5 @ 800 V	Fast Recovery ≤ 500ns	DO-15	Active
GPP20K-E3/73	Vishay General Semiconductor	800	2	1.1 @ 2 A	—	5 @ 800 V	Standard Recovery >500ns	DO-204AC (DO-15)	Active
GPP20M-E3/54	Vishay General Semiconductor	1000	2	1.1 @ 2 A	—	5 @ 1000 V	Standard Recovery >500ns	DO-204AC (DO-15)	Active
GPP20M-E3/73	Vishay General Semiconductor	1000	2	1.1 @ 2 A	—	5 @ 1000 V	Standard Recovery >500ns	DO-204AC (DO-15)	Active
HER208G-AP	Micro Commercial Co	1000	2	1.7 @ 2 A	75	5 @ 1000 V	Fast Recovery ≤ 500ns	DO-15	Active
HER208G-TP	Micro Commercial Co	1000	2	1.7 @ 2 A	75	5 @ 1000 V	Fast Recovery ≤ 500ns	DO-15	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

STTH208 is the direct active equivalent to STTH208RL. Both parts are manufactured by STMicroelectronics with identical electrical specifications: 800 V reverse voltage, 2 A average rectified current, 1.65 V forward voltage at 2 A, and 75 ns reverse recovery time. STTH208 is currently in active production status, making it the primary choice for obsolescence mitigation. The only difference is packaging format: STTH208RL is supplied in Tape & Reel (TR) while STTH208 is supplied in Cut Tape (CT). Both are ROHS3 compliant and carry identical regulatory certifications.

Primary Active Substitutes (800 V, 2 A Rating):

FR206GP-AP and FR206GP-TP (Micro Commercial Co) are functionally equivalent substitutes with 800 V reverse voltage and 2 A current rating. Both maintain the same reverse leakage current (5 µA @ 800 V) and fast recovery speed classification. Forward voltage is lower at 1.3 V @ 2 A compared to 1.65 V, resulting in reduced power dissipation. Reverse recovery time is 500 ns versus 75 ns in the original part. FR206GP-TP is supplied in Tape & Reel format matching the original packaging preference, while FR206GP-AP is supplied in bulk. Both are ROHS3 compliant and active products.

GPP20K-E3/73 (Vishay General Semiconductor) maintains 800 V reverse voltage and 2 A current rating with superior forward voltage performance at 1.1 V @ 2 A. This part operates with standard recovery speed (>500ns) rather than fast recovery. It is ROHS3 compliant and currently active. The lower forward voltage provides thermal advantages in high-frequency applications.

EGP20K (Nexperia USA Inc.) provides 800 V, 2 A specifications with 1.7 V forward voltage and 75 ns recovery time matching the original part's speed characteristics. However, EGP20K is classified as obsolete, limiting its suitability for new production despite current inventory availability.

Higher Voltage Substitutes (1000 V Rating):

GPP20M-E3/54 and GPP20M-E3/73 (Vishay General Semiconductor) are 1000 V rated alternatives maintaining 2 A current capacity. Both feature 1.1 V forward voltage and standard recovery speed. These parts are suitable for applications where higher voltage margin is beneficial. Both are ROHS3 compliant and in active production with substantial inventory.

HER208G-AP and HER208G-TP (Micro Commercial Co) provide 1000 V reverse voltage with 2 A current rating, 1.7 V forward voltage, and 75 ns recovery time. HER208G-TP is supplied in Cut Tape format. Both are ROHS3 compliant and active products. The 1000 V rating provides additional safety margin in high-voltage applications.

Not Recommended:

1N5621GP-E3/54 (Vishay General Semiconductor) is not suitable as a direct substitute due to reduced current rating of 1 A versus the required 2 A specification. This part cannot support the full load requirements of circuits designed for STTH208RL.

Frequently Asked Questions (FAQ)

Q: Can STTH208 directly replace STTH208RL without circuit modification?

A: Yes. STTH208 is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Cut Tape versus Tape & Reel). No circuit redesign is required. Both parts are ROHS3 compliant and manufactured by STMicroelectronics.

Q: What is the difference between fast recovery and standard recovery diodes, and does it affect substitution?

A: Fast recovery diodes have reverse recovery times ≤ 500 ns, while standard recovery diodes exceed 500 ns. Fast recovery diodes minimize switching losses in high-frequency applications. Substituting a standard recovery diode (such as GPP20K-E3/73) for a fast recovery diode (STTH208RL) is acceptable in low-frequency or non-switching applications but may increase switching losses in high-frequency circuits. Circuit evaluation is required when making this transition.

Q: Are 1000 V rated diodes suitable replacements for 800 V applications?

A: Yes. Higher voltage ratings provide additional reverse voltage margin and are functionally compatible with 800 V circuit requirements. Parts such as GPP20M-E3/73 and HER208G-TP rated for 1000 V can safely replace 800 V rated components. No circuit modification is necessary.

Q: Why is 1N5621GP-E3/54 listed but not recommended?

A: 1N5621GP-E3/54 has a reduced current rating of 1 A versus the required 2 A specification of STTH208RL. This part cannot support full load current and will experience thermal stress or failure in applications requiring 2 A operation. It is not a suitable substitute.

Q: What is the significance of forward voltage differences between substitute parts?

A: Forward voltage (Vf) directly affects power dissipation and heat generation. Lower forward voltage reduces power loss. STTH208RL specifies 1.65 V @ 2 A, while FR206GP-TP specifies 1.3 V @ 2 A and GPP20K-E3/73 specifies 1.1 V @ 2 A. Lower Vf values result in cooler operation and improved efficiency. All values remain within acceptable rectifier performance ranges.

Q: Does packaging format (Tape & Reel versus Cut Tape) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical specifications remain identical regardless of whether a part is supplied in Tape & Reel (TR), Cut Tape (CT), or Bulk format. Selection should be based on assembly equipment compatibility and inventory management requirements.

Q: Are all listed substitute parts ROHS3 compliant?

A: All recommended active substitutes are ROHS3 compliant. EGP20K is RoHS non-compliant and obsolete, making it unsuitable for new designs subject to environmental regulations. Verify compliance requirements for your specific application before final part selection.

Q: What is the operating temperature range consideration for substitution?

A: STTH208RL specifies maximum junction temperature of 175°C. Most active substitutes specify -55°C to 150°C or -55°C to 175°C operating ranges. Verify that the selected substitute's maximum junction temperature meets or exceeds your application's thermal requirements. Parts with lower maximum ratings may require additional thermal management.

Q: Can FR206GP-TP and FR206GP-AP be used interchangeably?

A: Yes. Both parts are electrically identical with the same 800 V, 2 A specifications, forward voltage, and recovery characteristics. The only difference is packaging: FR206GP-TP is supplied in Tape & Reel format while FR206GP-AP is supplied in bulk. Selection depends on assembly equipment and inventory preferences.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message