1N4002SP BK Equivalent & Substitute Parts

Part Overview

The 1N4002SP BK is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 100 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 new designs and ongoing production support. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within the allowed parameter tolerances for this diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	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 @ 100 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 1N4002SP BK is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A or lower (backward compatible)
Speed: Standard Recovery >500ns, > 200mA (Io) or faster (backward compatible)
Current - Reverse Leakage @ Vr: 5 µA @ 100 V or lower (backward compatible)
Mounting Type: Through Hole (exact match required)
Package / Case: DO-204AL, DO-41, or Axial (all mechanically compatible)

Secondary Considerations:

Operating Temperature Range: Substitute parts must support the application's required junction temperature range
RoHS Status: Active substitute parts are ROHS3 Compliant
Product Status: Active parts are preferred for new designs; parts marked "Not For New Designs" are acceptable for legacy support only

Substitute parts are grouped into two categories: Active Manufacturer Recommended parts (suitable for new designs) and Legacy Support parts (suitable for existing production continuity).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	Speed	Ir @ Vr [µA]	Tj (°C)	Product Status	RoHS
1N4002SP BK	Central Semiconductor Corp	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-65 to 175	Obsolete	—
1N4002-TP	Micro Commercial Co	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-55 to 150	Not For New Designs	ROHS3
1N4002-E3/54	Vishay General Semiconductor	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4002-G	Comchip Technology	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4002E-E3/53	Vishay General Semiconductor	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-50 to 150	Active	ROHS3
1N4002E-E3/54	Vishay General Semiconductor	100	1	1.1 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4002G A0G	Taiwan Semiconductor Corporation	100	1	1.0 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4002G B0G	Taiwan Semiconductor Corporation	100	1	1.0 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4002G R1G	Taiwan Semiconductor Corporation	100	1	1.0 @ 1	Standard >500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4934G A0G	Taiwan Semiconductor Corporation	100	1	1.2 @ 1	Fast ≤500ns	5 @ 100	-55 to 150	Active	ROHS3
1N4934RLG	onsemi	100	1	1.2 @ 1	Fast ≤500ns	5 @ 100	-65 to 150	Not For New Designs	ROHS3

Engineering Selection Recommendations

For New Designs (Active Product Status):

The following parts are recommended as primary substitutes for the obsolete 1N4002SP BK:

1N4002-E3/54 (Vishay General Semiconductor) — Active status, ROHS3 compliant, standard recovery speed, operating range -55°C to 150°C, available in Tape & Reel packaging with 811 pcs in stock.
1N4002-G (Comchip Technology) — Active status, ROHS3 compliant, standard recovery speed, operating range -55°C to 150°C, available in Cut Tape packaging with 13,557 pcs in stock.
1N4002E-E3/53 (Vishay General Semiconductor) — Active status, ROHS3 compliant, standard recovery speed, operating range -50°C to 150°C, available in Cut Tape packaging with 16,682 pcs in stock.
1N4002G A0G, 1N4002G B0G, 1N4002G R1G (Taiwan Semiconductor Corporation) — Active status, ROHS3 compliant, standard recovery speed, forward voltage 1.0 V @ 1 A (improved over 1.1 V specification), operating range -55°C to 150°C, available in Tape & Box or bulk packaging.

For Legacy Production Support (Not For New Designs):

1N4002-TP (Micro Commercial Co) — Not For New Designs status, ROHS3 compliant, standard recovery speed, operating range -55°C to 150°C, available in Cut Tape packaging with 43,003 pcs in stock.

Alternative Technology (Fast Recovery):

The 1N4934G A0G and 1N4934RLG are fast recovery variants (≤500 ns) with identical voltage and current ratings. These are suitable only if the application circuit specifically requires faster recovery characteristics. The 1N4934G A0G is Active; the 1N4934RLG is Not For New Designs.

Selection Criteria by Application:

Standard Recovery Applications: Select from 1N4002-E3/54, 1N4002-G, 1N4002E-E3/53, or Taiwan Semiconductor 1N4002G variants.
High-Volume Production: 1N4002-G (13,557 pcs) or 1N4002E-E3/53 (16,682 pcs) offer maximum inventory availability.
Temperature-Constrained Applications: Verify that the substitute part's operating range (-55°C to 150°C for most active parts, -50°C to 150°C for 1N4002E-E3/53) meets circuit requirements. The original 1N4002SP BK supports -65°C to 175°C; substitutes with narrower ranges may require thermal analysis.
Packaging Preference: All substitute parts are compatible with DO-41 through-hole mounting. Verify tape format (Cut Tape, Tape & Reel, or Tape & Box) matches assembly equipment.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace 1N4002SP BK with any of the listed substitute parts?

A: Yes, all listed substitute parts meet the electrical and mechanical substitution criteria: 100 V reverse voltage, 1 A average rectified current, standard recovery speed, and DO-41 through-hole package compatibility. However, verify that the substitute part's operating temperature range (-55°C to 150°C for most active parts) covers your application's requirements. The original part supports -65°C to 175°C; if your circuit operates below -55°C or above 150°C, thermal analysis is required.

Q2: What is the difference between 1N4002 and 1N4934 diodes?

A: Both are rated for 100 V and 1 A. The primary difference is recovery speed: 1N4002 is Standard Recovery (>500 ns), while 1N4934 is Fast Recovery (≤500 ns). Standard recovery diodes are suitable for general-purpose rectification in power supplies and AC-to-DC conversion. Fast recovery diodes are used in switching applications where reduced reverse recovery time minimizes switching losses. Select based on circuit topology, not as a general upgrade.

Q3: Why do some substitute parts show forward voltage of 1.0 V instead of 1.1 V?

A: The Taiwan Semiconductor 1N4002G variants (A0G, B0G, R1G) specify 1.0 V @ 1 A forward voltage, which is lower than the 1.1 V maximum of the original part. This is a manufacturing tolerance variation within the same product family and represents improved performance (lower forward drop). These parts are fully compatible and backward compatible with circuits designed for 1.1 V.

Q4: What does "Not For New Designs" product status mean?

A: Parts marked "Not For New Designs" are still manufactured and available but are in end-of-life or legacy support phase. They are suitable for replacement in existing production runs and field repairs but should not be selected for new circuit designs. For new designs, select parts with "Active" product status: 1N4002-E3/54, 1N4002-G, 1N4002E-E3/53, or Taiwan Semiconductor 1N4002G variants.

Q5: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 Compliant. The original 1N4002SP BK does not specify RoHS status. If your application requires RoHS certification, select from the active substitute parts, all of which carry ROHS3 Compliant designation.

Q6: Does packaging format (Cut Tape, Tape & Reel, Tape & Box) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly automation compatibility. Electrically, 1N4002-TP (Cut Tape), 1N4002-E3/54 (Tape & Reel), and 1N4002G A0G (Tape & Box) are identical. Select packaging based on your assembly equipment and volume requirements.

Q7: Can I use 1N4934RLG as a direct replacement for 1N4002SP BK?

A: Electrically, yes. The 1N4934RLG meets all voltage and current requirements. However, it is a fast recovery variant (300 ns typical recovery time vs. >500 ns for standard recovery) and is marked "Not For New Designs." Use only if your circuit specifically requires fast recovery characteristics and only for legacy production support. For new designs, select 1N4934G A0G (Active status) if fast recovery is required.

Q8: What inventory considerations should I account for?

A: Active substitute parts with highest inventory are 1N4002-G (13,557 pcs) and 1N4002E-E3/53 (16,682 pcs). If long-term supply security is critical, these parts offer the best availability. The 1N4002-TP (43,003 pcs) has the highest inventory but is marked "Not For New Designs."

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