MUR320SB Equivalent & Substitute Parts

Part Overview

The MUR320SB is a general-purpose fast recovery rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AA (SMB) package. The device is classified as Active product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary MUR320SB becomes unavailable due to supply constraints, discontinuation at specific distributors, or when alternative packaging formats are required for manufacturing flexibility. Parametric equivalents maintain identical electrical specifications, while similar parts offer reduced current ratings or modified electrical characteristics suitable for lower-power applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) Maximum @ If	900 mV @ 3 A	mV @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	25	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Capacitance @ Vr, F	45	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the MUR320SB are categorized into two groups based on electrical and mechanical compatibility:

Parametric Equivalents maintain all critical electrical specifications: 200 V reverse voltage, 3 A average rectified current, 900 mV forward voltage at 3 A, 25 ns reverse recovery time, and DO-214AA (SMB) package format. These parts differ only in packaging configuration (Tape & Reel versus Cut Tape) or minor manufacturing revisions. Parametric equivalents are direct functional replacements with no circuit redesign required.

Similar Parts share the same 200 V reverse voltage rating and DO-214AA (SMB) package but operate at reduced current ratings (1 A, 1.5 A, or 2 A) or exhibit different forward voltage and reverse recovery time characteristics. These parts are suitable for applications where the full 3 A current capability is not required, provided the circuit design accommodates the modified electrical parameters.

Substitution eligibility is determined by:

Reverse voltage rating (must equal or exceed 200 V)
Average rectified current (must meet or exceed application requirement)
Package compatibility (DO-214AA/SMB or SMA for mechanical fit)
Forward voltage and reverse recovery time (application-dependent)
Operating temperature range (-55°C to 175°C minimum)
RoHS3 compliance and MSL 1 rating

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) mV	trr (ns)	Package	Status
MUR320SB	Taiwan Semiconductor Corporation	200	3	900 @ 3A	25	DO-214AA (SMB)	Active
MUR320SB R5G	Taiwan Semiconductor Corporation	200	3	900 @ 3A	25	DO-214AA (SMB)	Discontinued at DiGi Electronics
MUR320SBHR5G	Taiwan Semiconductor Corporation	200	3	900 @ 3A	25	DO-214AA (SMB)	Discontinued at DiGi Electronics
ER2D-LTP	Micro Commercial Co	200	2	950 @ 2A	35	DO-214AA (SMB)	Active
ES2D-13-F	Diodes Incorporated	200	2	920 @ 2A	25	DO-214AA (SMB)	Active
ES2DA-13-F	Diodes Incorporated	200	2	920 @ 2A	25	DO-214AC (SMA)	Active
MURS120-13-F	Diodes Incorporated	200	1	875 @ 1A	25	DO-214AA (SMB)	Active
MURS120-E3/52T	Vishay General Semiconductor - Diodes Division	200	1	875 @ 1A	35	DO-214AA (SMB)	Active
MURS120-E3/5BT	Vishay General Semiconductor - Diodes Division	200	2	875 @ 1A	35	DO-214AA (SMB)	Active
RS2D-13-F	Diodes Incorporated	200	1.5	1300 @ 1.5A	150	DO-214AA (SMB)	Active
S2D-13-F	Diodes Incorporated	200	1.5	1150 @ 1.5A	Standard Recovery	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Parametric Equivalent Selection

The MUR320SB R5G and MUR320SBHR5G are parametric equivalents with identical electrical specifications (200 V, 3 A, 25 ns reverse recovery time). Both parts are discontinued at DiGi Electronics but remain available through alternative distribution channels. These parts are suitable for direct replacement in existing designs without circuit modification. Selection between these variants depends on packaging format availability: MUR320SB R5G is supplied in Cut Tape (CT) format with 1655 units in stock, while MUR320SBHR5G is also Cut Tape with 1060 units in stock.

Active Equivalent Selection for 2 A Applications

When 3 A current capability is not required, the ES2D-13-F (Diodes Incorporated) and MURS120-E3/5BT (Vishay) are active alternatives rated for 2 A. The ES2D-13-F maintains 25 ns reverse recovery time and 920 mV forward voltage at 2 A, with 130,906 units in stock. The MURS120-E3/5BT provides 35 ns reverse recovery time and 875 mV forward voltage specification (at 1 A), with 2,105 units in stock. Both maintain 200 V reverse voltage rating and DO-214AA (SMB) package compatibility.

Active Equivalent Selection for 1.5 A Applications

The RS2D-13-F and S2D-13-F (both Diodes Incorporated) are rated for 1.5 A average rectified current. The RS2D-13-F exhibits fast recovery characteristics (150 ns) with 1.3 V forward voltage at 1.5 A and 53,400 units in stock. The S2D-13-F operates with standard recovery speed (>500 ns) and 1.15 V forward voltage at 1.5 A, with 30,100 units in stock. Both maintain 200 V reverse voltage and DO-214AA (SMB) package format.

Active Equivalent Selection for 1 A Applications

The MURS120-13-F (Diodes Incorporated) and MURS120-E3/52T (Vishay) are rated for 1 A average rectified current. The MURS120-13-F provides 25 ns reverse recovery time, 875 mV forward voltage at 1 A, and 49,015 units in stock. The MURS120-E3/52T offers 35 ns reverse recovery time with identical forward voltage specification and 25,650 units in stock. Both maintain 200 V reverse voltage and DO-214AA (SMB) package compatibility.

Package Variant Consideration

The ES2DA-13-F (Diodes Incorporated) is a 2 A equivalent supplied in DO-214AC (SMA) package format instead of SMB. This part is suitable only when SMA package footprint is acceptable in the circuit design. It maintains 200 V reverse voltage, 25 ns reverse recovery time, and 920 mV forward voltage at 2 A, with 56,754 units in stock.

All recommended substitutes maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can MUR320SB R5G or MUR320SBHR5G be used as direct replacements for MUR320SB?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (200 V, 3 A, 25 ns reverse recovery time, 900 mV forward voltage at 3 A) and DO-214AA (SMB) package format. The only difference is packaging configuration (Cut Tape versus Tape & Reel). No circuit redesign is required.

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

A: Fast recovery diodes exhibit reverse recovery time ≤ 500 ns and are suitable for high-frequency switching applications. Standard recovery diodes have reverse recovery time > 500 ns and are used in lower-frequency rectification circuits. The MUR320SB is classified as fast recovery (25 ns). The S2D-13-F is classified as standard recovery. Selection depends on application switching frequency requirements.

Q: Can I use a 2 A rated diode (ES2D-13-F or MURS120-E3/5BT) in place of the 3 A MUR320SB?

A: Only if the circuit design requires maximum 2 A average rectified current. The 2 A parts will not safely handle 3 A continuous current. Verify application current requirements before substitution. Both 2 A alternatives maintain 200 V reverse voltage and DO-214AA (SMB) package compatibility.

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

A: Forward voltage affects power dissipation and voltage drop across the diode during conduction. The MUR320SB specifies 900 mV at 3 A. Substitute parts with lower forward voltage (875 mV at 1 A for MURS120 series) reduce power loss but are rated for lower current. Substitute parts with higher forward voltage (950 mV at 2 A for ER2D-LTP) increase power dissipation. Select based on application thermal and voltage drop requirements.

Q: Can ES2DA-13-F (SMA package) be used instead of MUR320SB (SMB package)?

A: Only if the circuit board footprint and PCB layout accommodate SMA package format. SMA and SMB are different package outlines with different pad configurations. Mechanical compatibility must be verified before substitution. Electrically, the ES2DA-13-F is equivalent to ES2D-13-F (2 A, 200 V, 25 ns recovery time).

Q: What does "Discontinued at DiGi Electronics" mean for MUR320SB R5G and MUR320SBHR5G?

A: These parts are no longer stocked by DiGi Electronics distribution but remain available through alternative distributors. Inventory levels are confirmed (1655 and 1060 units respectively) through other supply channels. Availability may vary by region and time. Verify current stock status with alternative suppliers before design commitment.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the MUR320SB environmental and regulatory requirements. No additional compliance verification is required for standard manufacturing and storage conditions.

Q: What is the operating temperature range consideration for substitution?

A: The MUR320SB operates from -55°C to 175°C junction temperature. Most substitute parts maintain this range or exceed it. The ES2D-13-F and ES2DA-13-F operate to 150°C maximum, which is acceptable for most applications but may be limiting in high-temperature environments. Verify application temperature requirements before final selection.

Q: Can reverse recovery time (trr) differences affect circuit performance?

A: Yes. Reverse recovery time affects switching speed and electromagnetic interference (EMI) characteristics. The MUR320SB and most Diodes Incorporated parts specify 25 ns. Vishay MURS120 series and ER2D-LTP specify 35 ns. The RS2D-13-F specifies 150 ns. Longer recovery times may increase switching losses and EMI in high-frequency applications. Select based on circuit switching frequency and EMI requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message