PR1004L-T Equivalent & Substitute Parts

Part Overview

The PR1004L-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design and procurement requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within acceptable parameter tolerances for general-purpose rectification applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the PR1004L-T is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package / Case: DO-41 or DO-204AL (functionally equivalent axial packages)

Substitution Categories:

Direct Manufacturer Equivalent: PR1004-T (Diodes Incorporated) maintains identical electrical specifications and differs only in product status (Active vs. Obsolete) and packaging format (Cut Tape vs. standard).

Parametric Equivalents: 1N4936-T and 1N4936G-T (Diodes Incorporated) satisfy all critical electrical parameters. Reverse recovery time (trr) is 200 ns versus 150 ns in the PR1004L-T, which remains within acceptable tolerance for general-purpose rectification. Both are Active status components.

Manufacturer-Recommended Substitutes: Parts from Vishay General Semiconductor - Diodes Division (1N3612GP-E3/73, 1N4004-E3/54, 1N4004-E3/73, 1N4004GP-E3/54), Micro Commercial Co (1N4004-TP), and Rectron USA (1N4004G) meet the 400 V / 1 A specification. These components employ standard recovery characteristics (>500ns) rather than fast recovery, which is acceptable for applications not requiring fast switching performance. Forward voltage (Vf) ranges from 1.0 V to 1.1 V, slightly lower than the PR1004L-T specification of 1.2 V, representing improved performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Speed	trr [ns]	Ir @ 400V [µA]	Package	Temp Range [°C]
PR1004L-T	Diodes Incorporated	Obsolete	400	1	1.2	Fast Recovery ≤ 500ns	150	5	DO-41	-65 to 150
PR1004-T	Diodes Incorporated	Active	400	1	1.2	Fast Recovery ≤ 500ns	150	5	DO-41	-65 to 150
1N4936-T	Diodes Incorporated	Active	400	1	1.2	Fast Recovery ≤ 500ns	200	5	DO-41	-65 to 150
1N4936G-T	Diodes Incorporated	Active	400	1	1.2	Fast Recovery ≤ 500ns	200	5	DO-41	-65 to 150
1N3612GP-E3/73	Vishay General Semiconductor	Active	400	1	1.0	Standard Recovery >500ns	2000	1	DO-204AL	-65 to 175
1N4004-E3/54	Vishay General Semiconductor	Active	400	1	1.1	Standard Recovery >500ns	—	5	DO-204AL	-55 to 150
1N4004-E3/73	Vishay General Semiconductor	Active	400	1	1.1	Standard Recovery >500ns	—	5	DO-204AL	-55 to 150
1N4004-TP	Micro Commercial Co	Active	400	1	1.1	Standard Recovery >500ns	2000	5	DO-41	-55 to 150
1N4004E-E3/53	Vishay General Semiconductor	Active	400	1	1.1	Standard Recovery >500ns	—	5	DO-204AL	-50 to 150
1N4004G	Rectron USA	Active	400	1	1.0	Standard Recovery >500ns	—	0.2	DO-41	-65 to 175
1N4004GP-E3/54	Vishay General Semiconductor	Active	400	1	1.1	Standard Recovery >500ns	2000	5	DO-204AL	-65 to 175

Engineering Selection Recommendations

Primary Selection - Direct Equivalent:

PR1004-T (Diodes Incorporated) is the recommended primary substitute. This part maintains identical electrical specifications to the PR1004L-T while offering Active product status, ensuring long-term availability and supply chain continuity. The part is ROHS3 compliant and carries the same operating temperature range (-65°C to 150°C). Packaging is available in Cut Tape (CT) format with 736 pieces in current inventory.

Secondary Selection - Parametric Equivalent (Fast Recovery):

1N4936-T or 1N4936G-T (Diodes Incorporated) provide parametric equivalence with fast recovery characteristics matching the PR1004L-T. The reverse recovery time specification of 200 ns versus 150 ns represents a minor deviation acceptable for general-purpose rectification. Both parts are Active status with ROHS3 compliance. 1N4936-T offers higher inventory (15,100 pieces) in Cut Tape format, while 1N4936G-T is available in Tape & Reel format (906 pieces).

Tertiary Selection - Standard Recovery Substitutes:

1N4004-series components (Vishay General Semiconductor - Diodes Division, Micro Commercial Co, Rectron USA) satisfy the 400 V / 1 A electrical requirements with standard recovery characteristics. These parts are suitable for applications where fast switching performance is not required. All variants are Active status and ROHS3 compliant. The 1N4004GP-E3/54 variant offers the highest inventory availability (40,609 pieces) and extended operating temperature range (-65°C to 175°C). The 1N4004G (Rectron USA) provides automotive-grade qualification (AEC-Q101) with improved reverse leakage characteristics (200 nA @ 400 V).

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited). The PR1004-T, 1N4936-T, and 1N4936G-T are REACH Unaffected, while Vishay and Micro Commercial Co variants are REACH Unaffected. All parts carry EAR99 ECCN classification and 8541.10.0080 HTSUS code.

Frequently Asked Questions (FAQ)

Q: Can PR1004-T directly replace PR1004L-T without circuit modification?

A: Yes. PR1004-T is a direct equivalent with identical electrical specifications (400 V, 1 A, 1.2 V forward voltage, 150 ns recovery time) and the same DO-41 through-hole package. The only differences are product status (Active vs. Obsolete) and packaging format (Cut Tape vs. standard). No circuit modifications are required.

Q: What is the difference between fast recovery and standard recovery diodes in this voltage/current class?

A: Fast recovery diodes (PR1004L-T, PR1004-T, 1N4936-T, 1N4936G-T) have reverse recovery times of 150–200 ns, enabling faster switching transitions. Standard recovery diodes (1N4004-series) have reverse recovery times of 2 µs (2000 ns), resulting in slower switching but lower cost. For general-purpose rectification at line frequencies (50–60 Hz), standard recovery performance is acceptable. Fast recovery is required for switching power supplies and higher-frequency applications.

Q: Are DO-41 and DO-204AL packages interchangeable?

A: DO-41 and DO-204AL are functionally equivalent axial through-hole packages for diodes. Both use identical lead spacing and mounting footprints. Parts specified as DO-204AL (DO-41) or DO-41 are mechanically and electrically interchangeable on the same PCB layout.

Q: Why do some substitutes have lower forward voltage (1.0–1.1 V vs. 1.2 V)?

A: Lower forward voltage indicates improved semiconductor material quality or different junction design. A forward voltage of 1.0–1.1 V at 1 A represents better performance than 1.2 V, resulting in lower power dissipation and heat generation. This is not a limitation but an enhancement for thermal management in the application.

Q: Which substitute offers the best availability?

A: 1N4004GP-E3/54 (Vishay General Semiconductor - Diodes Division) offers the highest inventory availability with 40,609 pieces in stock. This part is ROHS3 compliant, Active status, and available in Cut Tape format. It satisfies the 400 V / 1 A specification with standard recovery characteristics suitable for general-purpose rectification.

Q: Is the 1N4004G automotive-qualified option suitable for industrial applications?

A: Yes. The 1N4004G (Rectron USA) carries AEC-Q101 automotive qualification, which exceeds industrial reliability requirements. This part offers superior reverse leakage characteristics (200 nA @ 400 V vs. 5 µA typical) and extended operating temperature range (-65°C to 175°C), making it suitable for demanding industrial and automotive applications.

Q: What is the impact of reverse recovery time differences on circuit performance?

A: Reverse recovery time (trr) affects switching speed and electromagnetic interference (EMI) generation. The PR1004L-T specification of 150 ns is optimized for switching applications. The 1N4936-series at 200 ns represents a 33% increase but remains within fast recovery classification. Standard recovery diodes at 2 µs are suitable only for line-frequency rectification. For switching power supplies, select fast recovery variants (PR1004-T, 1N4936-T, 1N4936G-T).

Q: Can I use 1N4004-series parts in a circuit designed for PR1004L-T?

A: Electrical substitution is valid for general-purpose rectification applications. The 1N4004-series satisfies the 400 V / 1 A requirement with acceptable forward voltage (1.0–1.1 V). However, if the circuit operates at switching frequencies above 1 kHz, the 2 µs recovery time of standard recovery diodes may cause excessive reverse current and EMI. For switching applications, use fast recovery variants (PR1004-T, 1N4936-T, 1N4936G-T).

Q: What packaging formats are available for each substitute?

A: PR1004-T is available in Cut Tape (CT). 1N4936-T is available in Cut Tape (CT); 1N4936G-T is available in Tape & Reel (TR). Vishay 1N4004-series variants are available in Cut Tape (CT) or Tape & Box (TB). Micro Commercial Co 1N4004-TP is available in Cut Tape (CT). Rectron USA 1N4004G is available in Tape & Reel (TR). Select packaging format based on assembly equipment and volume requirements.

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