Equivalent & Substitute Parts for PR1506G-T

Part Overview

The PR1506G-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter tolerances for the same application category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1.5 A
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Package / Case	DO-204AC, DO-15, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the PR1506G-T is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 1.5 A
Package / Case: DO-204AC, DO-15, Axial (through-hole configuration)
Mounting Type: Through Hole

Acceptable Tolerance Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.4 V @ 1.5 A
Current - Reverse Leakage @ Vr: ≤ 5 µA @ 800 V
Operating Temperature - Junction: Minimum ≥ -65°C, Maximum ≥ 150°C
RoHS Status: ROHS3 Compliant

Non-Critical Variations:

Reverse Recovery Time (trr): Fast Recovery (≤ 500 ns) or Standard Recovery (> 500 ns)
Capacitance @ Vr, F: Variations acceptable within application requirements
Packaging format (Cut Tape, Tape & Reel, or bulk)

Parts meeting all mandatory parameters and acceptable tolerance parameters are classified as direct substitutes.

Parameter Comparison

Parameter	PR1506G-T (Main)	FR156GP-AP	1N5398-E3/54	1N5398GP-E3/54
Manufacturer	Diodes Incorporated	Micro Commercial Co	Vishay General Semiconductor	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	1.3 V @ 1.5 A	1.4 V @ 1.5 A	1.4 V @ 1.5 A
Speed	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns
Reverse Recovery Time (trr)	500 ns	500 ns	2 µs	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V
Capacitance @ Vr, F	25 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AL, DO-41, Axial	DO-204AC, DO-15, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-65 to 150°C	-55 to 150°C	-50 to 150°C	-65 to 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	1115 Pcs	860 Pcs	5600 Pcs	943 Pcs

Engineering Selection Recommendations

FR156GP-AP (Micro Commercial Co)

This part is a direct substitute for the PR1506G-T. It matches all mandatory electrical parameters (800 V, 1.5 A) and package specifications (DO-15 through-hole). The FR156GP-AP maintains identical forward voltage (1.3 V @ 1.5 A) and reverse leakage characteristics (5 µA @ 800 V). Fast recovery time (500 ns) is preserved. The operating temperature range (-55 to 150°C) is narrower at the lower bound by 10°C compared to the main part, which may be acceptable depending on application requirements. Product status is active with 860 units in stock. RoHS3 compliance is maintained.

1N5398GP-E3/54 (Vishay General Semiconductor - Diodes Division)

This part is a functional substitute for the PR1506G-T with the same voltage and current ratings (800 V, 1.5 A) and identical package configuration (DO-204AC, DO-15 through-hole). Forward voltage is slightly elevated at 1.4 V @ 1.5 A (compared to 1.3 V for the main part), which remains within acceptable tolerance. Recovery time is standard (2 µs) rather than fast (500 ns), representing a trade-off in switching speed. Operating temperature range is superior (-65 to 175°C), providing extended upper temperature capability. Product status is active with 943 units in stock. RoHS3 compliance is maintained. Packaging is Tape & Reel format.

1N5398-E3/54 (Vishay General Semiconductor - Diodes Division)

This part meets the voltage and current specifications (800 V, 1.5 A) but uses a different package configuration (DO-204AL, DO-41) compared to the main part (DO-15). This package difference requires PCB layout modification and is not a direct mechanical substitute. Electrical characteristics are equivalent to the 1N5398GP-E3/54 variant. Product status is active with 5600 units in stock. RoHS3 compliance is maintained. Selection of this part requires confirmation that the DO-41 package is compatible with the target application.

Frequently Asked Questions (FAQ)

Q: Can FR156GP-AP be used as a direct replacement for PR1506G-T?

A: Yes. The FR156GP-AP matches all mandatory electrical parameters (800 V reverse voltage, 1.5 A average rectified current) and package specifications (DO-15 through-hole). Forward voltage and reverse leakage characteristics are identical. The operating temperature range is narrower by 10°C at the lower bound (-55°C vs. -65°C), which is acceptable for most applications operating above -55°C.

Q: What is the difference between 1N5398GP-E3/54 and 1N5398-E3/54?

A: Both parts share the same base part number (1N5398) and electrical specifications. The primary difference is package format: 1N5398GP-E3/54 is supplied in Tape & Reel format with DO-204AC (DO-15) package, while 1N5398-E3/54 is supplied in Cut Tape format with DO-204AL (DO-41) package. The DO-15 variant (1N5398GP-E3/54) is mechanically compatible with PR1506G-T; the DO-41 variant requires PCB layout modification.

Q: Why does 1N5398GP-E3/54 have a longer reverse recovery time (2 µs vs. 500 ns)?

A: The 1N5398GP-E3/54 uses standard recovery diode technology, while the PR1506G-T uses fast recovery technology. Standard recovery diodes have slower switching characteristics but are suitable for lower-frequency applications. Fast recovery diodes are optimized for higher-frequency switching applications. Selection depends on the operating frequency and switching requirements of the target circuit.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (FR156GP-AP, 1N5398-E3/54, and 1N5398GP-E3/54) are RoHS3 compliant, matching the compliance status of the main part PR1506G-T.

Q: Which substitute part has the best inventory availability?

A: The 1N5398-E3/54 has the highest inventory with 5600 units in stock. However, this part uses a different package (DO-41) and requires PCB layout modification. For direct mechanical substitution with maximum availability, 1N5398GP-E3/54 offers 943 units in stock with identical DO-15 packaging.

Q: Can I use 1N5398-E3/54 if my PCB is designed for DO-15 package?

A: No. The 1N5398-E3/54 uses DO-204AL (DO-41) package, which has different lead spacing and dimensions compared to DO-204AC (DO-15). Direct substitution on an existing PCB designed for DO-15 is not possible without PCB modification. Use 1N5398GP-E3/54 instead, which maintains the DO-15 package format.

Q: What is the impact of forward voltage difference (1.3 V vs. 1.4 V)?

A: The forward voltage difference of 0.1 V between PR1506G-T (1.3 V) and the Vishay substitutes (1.4 V) results in slightly higher power dissipation in the substitute parts. At 1.5 A, this represents an additional 0.15 W of dissipation. This difference is typically negligible in most applications but should be verified if thermal management is critical.

Q: Are the substitute parts suitable for high-frequency switching applications?

A: FR156GP-AP is suitable for high-frequency applications, maintaining the fast recovery time (500 ns) of the original part. The Vishay 1N5398 variants (both 1N5398-E3/54 and 1N5398GP-E3/54) have standard recovery time (2 µs) and are better suited for lower-frequency or rectification applications. Application frequency requirements should determine the appropriate substitute selection.

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