MUR4100-TP Equivalent & Substitute Parts

Part Overview

The MUR4100-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 4 A average rectified current in a through-hole DO-201AD axial package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary for ongoing production and maintenance applications. Substitute diodes must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the through-hole axial mounting configuration.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	1.85 V @ 4 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the MUR4100-TP:

Direct Electrical Equivalents (4 A Rating): Parts maintaining the 4 A average rectified current specification with identical 1000 V reverse voltage rating and fast recovery characteristics. These parts are electrically interchangeable with the main part.

Parametric Equivalents (3 A Rating): Parts rated for 3 A average rectified current with 1000 V reverse voltage. These parts operate within the same voltage class but at reduced current capacity. Selection of 3 A rated parts requires circuit analysis to confirm that maximum operating current does not exceed 3 A.

Key Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V (required)
Mounting Type: Through Hole (required)
Package / Case: DO-201AD or equivalent axial configuration (required)
Current - Average Rectified (Io): 4 A (direct equivalents) or 3 A (parametric equivalents)
Speed: Fast Recovery or Standard Recovery (application-dependent)
Operating Temperature Range: Must encompass circuit operating conditions
RoHS Status: ROHS3 Compliant (required for compliance applications)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
MUR4100-TP	Micro Commercial Co	1000	4	1.85 @ 4A	Fast Recovery ≤ 500ns	75	10 @ 1000V	DO-201AD	-55 ~ 150	Obsolete
MUR4100ERLG	onsemi	1000	4	1.85 @ 4A	Fast Recovery ≤ 500ns	100	25 @ 1000V	DO-201AA, DO-27, Axial	-65 ~ 175	Active
MUR4100EG	onsemi	1000	4	1.85 @ 4A	Fast Recovery ≤ 500ns	100	25 @ 1000V	DO-201AA, DO-27, Axial	-65 ~ 175	Active
UF4010G_AY_00001	Panjit International Inc.	1000	4	1.85 @ 4A	Fast Recovery ≤ 500ns	75	10 @ 1000V	DO-201AD	-55 ~ 150	Active
1N5408-G	Comchip Technology	1000	3	0.95 @ 3A	Standard Recovery > 500ns	—	5 @ 1000V	DO-201AD	-65 ~ 125	Active
1N5408G	Taiwan Semiconductor Corporation	1000	3	1.0 @ 3A	Standard Recovery > 500ns	—	5 @ 1000V	DO-201AD	-55 ~ 150	Active
1N5408RLG	onsemi	1000	3	1.0 @ 3A	Standard Recovery > 500ns	—	10 @ 1000V	DO-201AA, DO-27, Axial	-65 ~ 150	Not For New Designs
STTH310	STMicroelectronics	1000	3	1.7 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 1000V	DO-201AD	-40 ~ 175	Active
STTH310RL	STMicroelectronics	1000	3	1.7 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 1000V	DO-201AD	-40 ~ 175	Active

Engineering Selection Recommendations

For Direct Current Rating Replacement (4 A):

The MUR4100ERLG and MUR4100EG from onsemi are direct electrical equivalents with active product status. Both maintain the 4 A current rating, 1000 V reverse voltage, and fast recovery characteristics. The MUR4100ERLG is available in higher volume (217,300 pcs) and is packaged in Cut Tape format, making it suitable for production environments. The MUR4100EG is available in bulk packaging (1,578 pcs). Both parts extend the operating temperature range to -65°C ~ 175°C compared to the original -55°C ~ 150°C specification.

The UF4010G_AY_00001 from Panjit International Inc. provides an alternative 4 A equivalent with identical electrical characteristics to the MUR4100-TP, including the 75 ns reverse recovery time and DO-201AD package. This part maintains the original temperature range of -55°C ~ 150°C and is available in active status with 2,798 pcs in stock.

For Reduced Current Rating Replacement (3 A):

The STTH310 and STTH310RL from STMicroelectronics are 3 A rated alternatives with fast recovery characteristics matching the original part's speed classification. Both maintain the 1000 V reverse voltage and DO-201AD package. These parts offer extended temperature range to -40°C ~ 175°C and are available in active status with substantial inventory (4,618 and 10,300 pcs respectively).

The 1N5408G from Taiwan Semiconductor Corporation is a 3 A standard recovery alternative with active status and 38,100 pcs available. This part maintains the original temperature range of -55°C ~ 150°C.

The 1N5408-G from Comchip Technology is a 3 A standard recovery alternative with active status and 16,615 pcs available. This part operates at -65°C ~ 125°C.

Compliance Considerations:

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory classification. Selection should prioritize parts with active product status for long-term availability assurance.

Product Status Impact:

The 1N5408RLG from onsemi carries a "Not For New Designs" status and should be avoided for new circuit development, though it remains available for legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can I use a 3 A rated diode as a substitute for the 4 A MUR4100-TP?

A: A 3 A rated diode can be used only if circuit analysis confirms that the maximum average rectified current does not exceed 3 A under all operating conditions, including worst-case scenarios. The 3 A rating represents the maximum continuous current capacity. Exceeding this rating will result in excessive junction temperature and component failure.

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

A: Fast recovery diodes have a reverse recovery time of 500 ns or less, while standard recovery diodes exceed 500 ns. Fast recovery diodes are preferred in high-frequency switching applications to minimize switching losses and electromagnetic interference. Standard recovery diodes are suitable for lower-frequency rectification applications. The MUR4100-TP specifies fast recovery characteristics; substitution with standard recovery types requires circuit analysis to confirm compatibility.

Q: Are all substitute parts available in the same DO-201AD package?

A: Most substitute parts are available in DO-201AD or equivalent axial packages. The MUR4100ERLG and MUR4100EG are supplied in axial format compatible with DO-201AA and DO-27 designations, which are mechanically equivalent to DO-201AD. Verify package dimensions and lead spacing before installation to ensure mechanical fit in existing PCB layouts.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the interval required for a diode to transition from forward conduction to reverse blocking after the applied voltage reverses. Shorter recovery times reduce switching losses and are critical in high-frequency applications. The MUR4100-TP specifies 75 ns. Substitute parts with longer recovery times (such as the 100 ns specification of MUR4100ERLG and MUR4100EG) may introduce additional switching losses in fast-switching circuits.

Q: Can I substitute the MUR4100-TP with a part rated for higher voltage?

A: Yes. A diode rated for higher reverse voltage (such as 1200 V or 1600 V) can be substituted for the 1000 V MUR4100-TP, provided all other electrical parameters (current, forward voltage, recovery time) and mechanical parameters (package, mounting type) are compatible. Higher voltage ratings do not compromise circuit function in lower-voltage applications.

Q: What does "Not For New Designs" status mean?

A: "Not For New Designs" indicates that the manufacturer no longer recommends the part for new circuit development. While the part may remain available for a limited period, long-term supply cannot be assured. For new designs, select parts with "Active" product status to ensure sustained availability and manufacturer support.

Q: How do I determine if a substitute part's temperature range is acceptable?

A: Compare the substitute part's operating temperature range with the maximum and minimum junction temperatures expected in your circuit. The substitute part's range must fully encompass the circuit's operating conditions. For example, if your circuit operates at -40°C to 100°C, a part rated -55°C ~ 150°C is acceptable, but a part rated -40°C ~ 125°C is also acceptable. A part rated only 0°C ~ 125°C would not be suitable.

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

A: Forward voltage differences affect power dissipation and voltage drop across the diode during conduction. The MUR4100-TP specifies 1.85 V @ 4 A. Substitute parts with lower forward voltage (such as 1N5408-G at 0.95 V @ 3 A) dissipate less power but operate at reduced current. Substitute parts with similar forward voltage (such as STTH310 at 1.7 V @ 3 A) produce comparable thermal characteristics. Circuit design must account for forward voltage when calculating total circuit voltage drop and power dissipation.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original MUR4100-TP specification. This ensures compatibility with RoHS-regulated applications and procurement requirements.

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