MUR120-TP Equivalent & Substitute Parts

Part Overview

The MUR120-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 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. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and recovery speed characteristics.

Key Parameters

Parameter	MUR120-TP Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.35 V @ 1 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	45	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MUR120-TP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Through Hole required
Package / Case: DO-41 or DO-204AL (axial configuration)

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Lower values indicate improved efficiency; values up to 1.35 V are acceptable
Recovery Speed: Fast recovery (≤ 500ns) preferred for switching applications; standard recovery (> 500ns) acceptable for linear rectification
Reverse Recovery Time (trr): Lower values reduce switching losses; not a limiting factor for substitution
Operating Temperature Range: Must accommodate application requirements; wider ranges provide design flexibility
RoHS Compliance: ROHS3 compliance preferred for regulatory alignment

Substitute parts are grouped into two categories: Direct Equivalents (matching fast recovery characteristics and forward voltage profile) and Compatible Alternatives (meeting voltage and current specifications with standard recovery characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Package	Temp Range [°C]	RoHS Status	Product Status
MUR120-TP	Micro Commercial Co	200	1	1.35 @ 1 A	Fast Recovery ≤ 500ns	45	DO-41	-55 to 150	ROHS3 Compliant	Obsolete
1N4935-T	Diodes Incorporated	200	1	1.2 @ 1 A	Fast Recovery ≤ 500ns	200	DO-41	-65 to 150	ROHS3 Compliant	Active
EGP10D	Fairchild Semiconductor	200	1	0.95 @ 1 A	Fast Recovery ≤ 500ns	50	DO-41	-65 to 150	Not specified	Active
EGP10D-E3/54	Vishay General Semiconductor - Diodes Division	200	1	0.95 @ 1 A	Fast Recovery ≤ 500ns	50	DO-41	-65 to 150	ROHS3 Compliant	Active
EGP10D-E3/73	Vishay General Semiconductor - Diodes Division	200	1	0.95 @ 1 A	Fast Recovery ≤ 500ns	50	DO-41	-65 to 150	ROHS3 Compliant	Active
1N4003GPE-E3/54	Vishay General Semiconductor - Diodes Division	200	1	1.1 @ 1 A	Standard Recovery > 500ns	2000	DO-41	-65 to 175	ROHS3 Compliant	Active
GP10D-E3/54	Vishay General Semiconductor - Diodes Division	200	1	1.1 @ 1 A	Standard Recovery > 500ns	3000	DO-41	-65 to 175	ROHS3 Compliant	Active
GP10D-E3/73	Vishay General Semiconductor - Diodes Division	200	1	1.1 @ 1 A	Standard Recovery > 500ns	3000	DO-41	-65 to 175	ROHS3 Compliant	Active
1N3611	Microchip Technology	200	1	1.1 @ 1 A	Standard Recovery > 500ns	Not specified	Axial	-65 to 175	RoHS non-compliant	Active
GP08D-E3/54	Vishay General Semiconductor - Diodes Division	200	0.8	1.3 @ 800 mA	Standard Recovery > 500ns	2000	DO-41	-65 to 175	ROHS3 Compliant	Active
GP08D-E3/73	Vishay General Semiconductor - Diodes Division	200	0.8	1.3 @ 800 mA	Standard Recovery > 500ns	2000	DO-41	-65 to 175	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for Fast Recovery Applications):

The 1N4935-T, EGP10D, EGP10D-E3/54, and EGP10D-E3/73 are direct functional equivalents to the MUR120-TP. These parts maintain the fast recovery characteristic (≤ 500ns) essential for switching power supply and high-frequency rectification circuits. All four parts are active products with ROHS3 compliance (except EGP10D, which does not specify RoHS status). The 1N4935-T offers the closest forward voltage profile (1.2 V) to the original part, while the EGP10D variants provide superior forward voltage performance (0.95 V), resulting in reduced power dissipation. The EGP10D-E3/54 and EGP10D-E3/73 are functionally identical, differing only in packaging configuration (Tape & Reel versus Tape & Box).

Compatible Alternatives (Standard Recovery for Linear Rectification):

The 1N4003GPE-E3/54, GP10D-E3/54, and GP10D-E3/73 are compatible substitutes for applications where standard recovery characteristics (> 500ns) are acceptable. These parts meet the 200 V, 1 A electrical specifications and provide extended operating temperature ranges (-65 to 175°C) compared to the original part. All three are ROHS3 compliant and active products. The GP10D variants are functionally identical, differing only in packaging configuration.

Current-Limited Alternative:

The GP08D-E3/54 and GP08D-E3/73 are compatible for applications where the 1 A current rating is not fully utilized. These parts are rated for 800 mA average rectified current at 200 V and are functionally identical, differing only in packaging configuration. Both are ROHS3 compliant and active products.

Non-Compliant Alternative:

The 1N3611 from Microchip Technology meets the 200 V, 1 A electrical specifications but is RoHS non-compliant. This part is suitable only for applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can the 1N4935-T directly replace the MUR120-TP in all applications?

A: The 1N4935-T is a direct functional equivalent with matching fast recovery characteristics (≤ 500ns) and identical voltage and current ratings. It is suitable for all applications where the MUR120-TP was used. The 1N4935-T is an active product with ROHS3 compliance, making it the preferred replacement for new designs.

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

A: Fast recovery diodes (≤ 500ns reverse recovery time) are optimized for switching applications where rapid turn-off is critical to minimize switching losses and electromagnetic interference. Standard recovery diodes (> 500ns) are suitable for linear rectification and lower-frequency applications. The MUR120-TP is a fast recovery device; substitution with standard recovery parts is acceptable only if the application does not require fast switching characteristics.

Q: Are the EGP10D and EGP10D-E3/54 interchangeable?

A: The EGP10D and EGP10D-E3/54 are electrically identical. The primary difference is packaging: EGP10D is supplied in bulk, while EGP10D-E3/54 is supplied in cut tape. Both are suitable for the same applications; selection depends on procurement and assembly requirements.

Q: Why is the 1N3611 listed as a substitute if it is RoHS non-compliant?

A: The 1N3611 meets all electrical and mechanical specifications for substitution (200 V, 1 A, DO-41 package). However, its RoHS non-compliance restricts its use to applications and markets where RoHS compliance is not mandated. For new designs and regulated applications, ROHS3-compliant alternatives are recommended.

Q: Can the GP08D-E3/54 be used in place of the MUR120-TP?

A: The GP08D-E3/54 is rated for 800 mA average rectified current, compared to the MUR120-TP's 1 A rating. It is suitable only for applications where the actual current demand does not exceed 800 mA. If the application requires the full 1 A capability, the GP08D-E3/54 is not an appropriate substitute.

Q: What is the significance of the -E3/54 and -E3/73 suffixes in Vishay part numbers?

A: These suffixes indicate packaging and tape configuration variants. The -E3/54 suffix denotes Tape & Reel (TR) packaging, while -E3/73 denotes Tape & Box (TB) packaging. Both variants are electrically identical; the suffix reflects only the physical packaging format for automated assembly or manual handling.

Q: Is the extended temperature range of the 1N4003GPE-E3/54 (-65 to 175°C) beneficial for the MUR120-TP replacement?

A: The extended temperature range provides design flexibility for applications operating at elevated ambient temperatures or with high thermal loads. However, the original MUR120-TP operates to 150°C junction temperature. If the application does not require operation above 150°C, the extended range of the 1N4003GPE-E3/54 offers no functional advantage but does not introduce compatibility issues.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage differences directly affect power dissipation and heat generation. The EGP10D variants (0.95 V) dissipate less power than the MUR120-TP (1.35 V), resulting in lower junction temperatures and improved efficiency. The 1N4935-T (1.2 V) provides a middle ground. For high-current or thermally constrained applications, lower forward voltage parts reduce thermal stress on the component and surrounding circuitry.

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