1N4942-TP Equivalent & Substitute Parts

Part Overview

The 1N4942-TP is a general-purpose rectifier diode rated for 200 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design and procurement requirements. The 1N4942-TP features fast recovery characteristics with a reverse recovery time of 150 ns, making it suitable for applications requiring rapid switching performance in standard rectification circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 1N4942-TP is determined by electrical and mechanical parameter alignment within the rectifier diode category. The critical parameters governing substitution are:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A (or lower)
Reverse Recovery Time (trr): 150 ns (or lower)
Current - Reverse Leakage @ Vr: 5 µA @ 200 V (or lower)

Mechanical Parameters:

Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial
Operating Temperature - Junction: -55°C to 150°C

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes: Parts from the same manufacturer (Micro Commercial Co) with identical electrical specifications and active product status, differing only in packaging format (Tape & Reel vs. bulk).

Parametric Equivalents: Parts from alternative manufacturers (Taiwan Semiconductor Corporation, Comchip Technology, Panjit International Inc.) that meet or exceed the electrical performance requirements while maintaining mechanical compatibility and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Product Status
1N4942-TP	Micro Commercial Co	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-41	Obsolete
1N4942GP-TP	Micro Commercial Co	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-41	Active
1N4935GP-TP	Micro Commercial Co	200	1	1.2 @ 1 A	200	5 @ 200 V	DO-41	Active
FR103G	Taiwan Semiconductor Corporation	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-204AL (DO-41)	Active
FR103G A0G	Taiwan Semiconductor Corporation	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-204AL (DO-41)	Active
FR103G R0G	Taiwan Semiconductor Corporation	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-204AL (DO-41)	Discontinued at DiGi Electronics
FR103G R1G	Taiwan Semiconductor Corporation	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-204AL (DO-41)	Active
FR103T-G	Comchip Technology	200	1	1.3 @ 1 A	150	5 @ 200 V	DO-41	Active
PG102R_R2_00001	Panjit International Inc.	200	1	1.3 @ 1 A	150	1 @ 200 V	DO-41	Active

Engineering Selection Recommendations

Primary Recommendation: 1N4942GP-TP

The 1N4942GP-TP is the direct active equivalent from the original manufacturer, Micro Commercial Co. This part maintains identical electrical specifications to the 1N4942-TP while holding active product status. The only difference is packaging format (Tape & Reel vs. bulk). This part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Selection of this part eliminates any design risk associated with cross-manufacturer substitution.

Secondary Recommendation: FR103G A0G

The FR103G A0G from Taiwan Semiconductor Corporation provides parametric equivalence with identical electrical performance (200 V, 1 A, 150 ns recovery time, 1.3 V forward voltage). This part is available in Cut Tape packaging with the highest inventory level (2510 pcs). It is ROHS3 compliant and REACH unaffected. The FR103G A0G is suitable for applications where packaging format flexibility is acceptable.

Alternative Recommendation: FR103T-G

The FR103T-G from Comchip Technology meets all electrical requirements with identical voltage, current, and recovery time specifications. This part is available in Tape & Reel packaging and maintains active product status. It is ROHS3 compliant and suitable for high-volume procurement scenarios.

Parametric Alternative: 1N4935GP-TP

The 1N4935GP-TP from Micro Commercial Co offers improved forward voltage performance (1.2 V vs. 1.3 V @ 1 A), resulting in lower power dissipation. The reverse recovery time is slightly longer (200 ns vs. 150 ns), which may be acceptable in non-critical switching applications. This part is active and ROHS3 compliant.

Not Recommended: FR103G R0G

While FR103G R0G meets all electrical specifications, it is discontinued at DiGi Electronics and carries uncertain long-term availability status. This part should be avoided for new designs requiring sustained component supply.

Frequently Asked Questions (FAQ)

Q: Can I use 1N4942GP-TP as a direct replacement for 1N4942-TP?

A: Yes. The 1N4942GP-TP is electrically and mechanically identical to the 1N4942-TP. The only difference is packaging format (Tape & Reel vs. bulk). Both parts are rated for 200 V, 1 A, with 150 ns reverse recovery time and 1.3 V forward voltage. The 1N4942GP-TP is active, making it the preferred choice for new procurement.

Q: What is the difference between DO-41 and DO-204AL packaging?

A: DO-41 and DO-204AL are equivalent designations for the same axial through-hole package. Both refer to a cylindrical component with leads at each end, suitable for insertion into through-hole PCB designs. Parts specified as DO-204AL (DO-41) or DO-41 are mechanically interchangeable.

Q: Are Taiwan Semiconductor Corporation parts (FR103G series) compatible with my circuit designed for 1N4942-TP?

A: Yes, provided your circuit operates within the specified electrical parameters. The FR103G series maintains identical voltage ratings (200 V), current ratings (1 A), and recovery time (150 ns). All parts are through-hole mounted in compatible packages. Verify that your PCB layout accommodates the specific package variant (DO-41 vs. DO-204AL).

Q: Why does PG102R_R2_00001 show lower reverse leakage current (1 µA vs. 5 µA)?

A: Lower reverse leakage current represents improved performance and does not prevent substitution. The PG102R_R2_00001 from Panjit International Inc. meets all other electrical specifications (200 V, 1 A, 150 ns recovery, 1.3 V forward voltage) and is mechanically compatible. Lower leakage current may reduce standby power consumption in certain applications.

Q: Can I substitute 1N4935GP-TP for 1N4942-TP in a high-frequency switching application?

A: The 1N4935GP-TP has a longer reverse recovery time (200 ns vs. 150 ns). In high-frequency switching applications where recovery time is critical, this difference may impact circuit performance. Verify that your switching frequency and circuit design accommodate the extended recovery time before substitution.

Q: What does "Discontinued at DiGi Electronics" mean for FR103G R0G?

A: This designation indicates that the part is no longer actively stocked or sold through DiGi Electronics, though it may remain available through other distributors. For new designs requiring sustained long-term supply, select parts with "Active" product status such as FR103G A0G or FR103G R1G.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, meeting environmental and regulatory requirements for lead-free manufacturing and restricted substance limitations.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. These parts do not require special moisture-controlled storage or handling procedures, simplifying inventory management and reducing procurement complexity.

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