1N4001 BK General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The 1N4001 BK is a general purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the allowed parameter ranges for this diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65 to 175	°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 1N4001 BK is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must be ≥ 50 V
Current - Average Rectified (Io): Must be ≥ 1 A
Voltage - Forward (Vf) (Max) @ If: Must be ≤ 1.1 V @ 1 A (with tolerance for minor variations)
Current - Reverse Leakage @ Vr: Must be ≤ 5 µA @ rated voltage

Mechanical Compatibility Criteria:

Mounting Type: Through Hole (required)
Package / Case: DO-204AL, DO-41, or Axial equivalent (required)
Operating Temperature Range: Must encompass or exceed -65°C to 175°C

Regulatory & Compliance Criteria:

RoHS Status: ROHS3 Compliant (preferred for active parts)
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts are grouped into two categories:

Category 1 - Manufacturer Recommended Substitutes (MFR Recommended): Parts explicitly identified as direct replacements with identical or superior electrical ratings and active product status.

Category 2 - Parametric Equivalents: Parts meeting all electrical and mechanical specifications with active status and full compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ 1A (V)	Speed	Ir @ Vr (µA)	Package	Temp Range (°C)	Product Status	RoHS
1N4001 BK	Central Semiconductor Corp	50	1	1.1	Standard >500ns	5 @ 50V	DO-41	-65 to 175	Obsolete	—
1N4007 BK	Central Semiconductor Corp	1000	1	1.1	Standard >500ns	5 @ 1000V	DO-41	-65 to 175	Active	ROHS3
1N4001-E3/53	Vishay General Semiconductor	50	1	1.1	Standard >500ns	5 @ 50V	DO-204AL	-50 to 150	Active	ROHS3
1N4001GPE-E3/73	Vishay General Semiconductor	50	1	1.1	Standard >500ns	5 @ 50V	DO-204AL	-65 to 175	Active	ROHS3
1N4933GHB0G	Taiwan Semiconductor Corporation	50	1	1.2	Fast ≤500ns	5 @ 50V	DO-204AL	-55 to 150	Active	ROHS3
1N4933GHR1G	Taiwan Semiconductor Corporation	50	1	1.2	Fast ≤500ns	5 @ 50V	DO-204AL	-55 to 150	Active	ROHS3
GP10A-E3/54	Vishay General Semiconductor	50	1	1.1	Standard >500ns	5 @ 50V	DO-204AL	-65 to 175	Active	ROHS3
UF1AHA0G	Taiwan Semiconductor Corporation	50	1	1.0	Fast ≤500ns	5 @ 50V	DO-204AL	-55 to 150	Active	ROHS3
UF1AHR1G	Taiwan Semiconductor Corporation	50	1	1.0	Fast ≤500ns	5 @ 50V	DO-204AL	-55 to 150	Active	ROHS3
1N4001G	Taiwan Semiconductor Corporation	50	1	1.0	Standard >500ns	5 @ 50V	DO-204AL	-55 to 150	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical & Mechanical Specifications):

Select 1N4001-E3/53 (Vishay General Semiconductor) or 1N4001GPE-E3/73 (Vishay General Semiconductor) for applications requiring exact parameter matching. Both parts maintain 50 V reverse voltage, 1 A current rating, and 1.1 V forward voltage specification. The 1N4001GPE-E3/73 offers extended temperature range (-65°C to 175°C) matching the original specification, while 1N4001-E3/53 operates within -50°C to 150°C. Both are ROHS3 compliant and carry active product status.

For Parametric Equivalence with Enhanced Performance:

Select 1N4001G (Taiwan Semiconductor Corporation) for applications where lower forward voltage (1.0 V @ 1 A) provides operational benefit. This part maintains identical voltage and current ratings with active status and ROHS3 compliance. Operating temperature range is -55°C to 150°C.

For Automotive-Grade Applications:

Select 1N4933GHB0G or 1N4933GHR1G (Taiwan Semiconductor Corporation) for designs requiring AEC-Q101 automotive qualification. Both parts meet electrical specifications with fast recovery characteristics (≤500ns, trr 200ns) and carry automotive-grade designation. Operating temperature range is -55°C to 150°C.

For Fast Recovery Applications:

Select UF1AHA0G or UF1AHR1G (Taiwan Semiconductor Corporation) for circuits benefiting from fast recovery performance (≤500ns, trr 50ns) and lower forward voltage (1.0 V @ 1 A). Both carry AEC-Q101 automotive qualification and ROHS3 compliance.

For Higher Voltage Tolerance:

Select 1N4007 BK (Central Semiconductor Corp) when circuit design permits use of 1000 V reverse voltage rating. This part maintains 1 A current rating and 1.1 V forward voltage with active status and ROHS3 compliance. Operating temperature range is -65°C to 175°C.

For Tape & Reel Packaging:

Select GP10A-E3/54 (Vishay General Semiconductor) or 1N4001G (Taiwan Semiconductor Corporation) when automated assembly processes require tape and reel packaging. Both maintain electrical specifications and active product status.

Frequently Asked Questions (FAQ)

Q: Can 1N4007 BK replace 1N4001 BK in all applications?

A: Yes, within the constraint that the circuit design accommodates the higher 1000 V reverse voltage rating. The 1N4007 BK maintains identical 1 A current and 1.1 V forward voltage specifications. Higher voltage rating does not degrade performance in 50 V applications. Verify circuit board layout compatibility with DO-41 package dimensions.

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

A: Recovery speed is specified as either Standard Recovery (>500ns) or Fast Recovery (≤500ns). The 1N4001 BK uses standard recovery. Fast recovery variants (1N4933 series, UF1A series) exhibit shorter reverse recovery time (trr), reducing switching losses in high-frequency applications. Both types are electrically compatible for 50 V, 1 A DC rectification applications.

Q: Are Vishay and Taiwan Semiconductor parts interchangeable with the original Central Semiconductor 1N4001 BK?

A: Yes. All substitute parts listed maintain the critical electrical parameters: 50 V reverse voltage, 1 A average rectified current, and through-hole DO-41/DO-204AL package compatibility. Mechanical fit and electrical function are preserved. Verify specific packaging format (bulk, cut tape, or tape & reel) matches procurement requirements.

Q: Does forward voltage variation (1.0 V vs. 1.1 V @ 1 A) affect circuit performance?

A: Forward voltage variation of 0.1 V is within normal diode tolerance and does not affect circuit function in standard rectification applications. Lower forward voltage (1.0 V) in UF1A and 1N4001G variants results in marginally reduced power dissipation. For precision analog circuits, verify forward voltage specification against design requirements.

Q: What is the significance of AEC-Q101 qualification on 1N4933 and UF1A parts?

A: AEC-Q101 qualification indicates automotive-grade reliability testing and is required for automotive applications. These parts are suitable for both automotive and industrial applications. Non-automotive-qualified parts (1N4001-E3/53, 1N4001GPE-E3/73, GP10A-E3/54, 1N4001G) are suitable for consumer and industrial applications but not automotive designs.

Q: Can I use 1N4001-E3/53 in applications requiring -65°C operation?

A: No. The 1N4001-E3/53 operates within -50°C to 150°C range. For applications requiring -65°C minimum operating temperature, select 1N4001GPE-E3/73 or 1N4007 BK, both rated -65°C to 175°C.

Q: What packaging formats are available for automated assembly?

A: Tape & Reel (TR) packaging is available for 1N4001G and GP10A-E3/54, suitable for automated pick-and-place assembly. Cut Tape (CT) packaging is available for 1N4001-E3/53. Bulk packaging is available for 1N4007 BK. Verify packaging format compatibility with assembly equipment specifications.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original 1N4001 BK does not specify RoHS status due to obsolete classification. All substitute parts are suitable for applications requiring RoHS compliance.

Q: What is the difference between 1N4933GHB0G and 1N4933GHR1G?

A: Both parts are identical in electrical specifications, package, and automotive qualification. The difference is in manufacturing lot or packaging variant designation. Both are suitable for direct substitution and carry identical performance characteristics.

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