DS75-12B Equivalent & Substitute Parts Reference

Part Overview

The DS75-12B is a general-purpose rectifier diode manufactured by IXYS, rated for 1200 V DC reverse voltage and 110 A average rectified current in a DO-203AB stud mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing applications and new designs. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating package and mounting variations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1200	V
Current - Average Rectified (Io)	110	A
Voltage - Forward (Vf) (Max) @ If	1.17 V @ 150 A	V
Current - Reverse Leakage @ Vr	6	mA @ 1200 V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Mounting Type	Chassis, Stud Mount	—
Package / Case	DO-203AB, DO-5, Stud	—
Operating Temperature - Junction	-40°C ~ 180°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the DS75-12B are selected based on the following critical parameters:

Voltage Rating Compatibility: All substitute parts must support a minimum DC reverse voltage (Vr) of 1200 V to maintain circuit protection and reliability.

Current Rating Compatibility: Substitute parts must support the average rectified current (Io) requirement. The DS75-12B operates at 110 A; substitutes with lower current ratings (40 A) are suitable for applications with reduced current demands, while substitutes with higher ratings (150 A) provide additional margin.

Mounting and Package Compatibility: The DS75-12B uses DO-203AB stud mount packaging. Substitute parts must use compatible stud mount packages (DO-203AB, DO-5, or DO-205AA) to ensure mechanical fit and thermal interface compatibility.

Recovery Speed: All substitute parts maintain standard recovery characteristics (>500ns, >200mA), ensuring consistent switching behavior.

Temperature Range: Operating temperature ranges must accommodate the application environment. The DS75-12B operates from -40°C to 180°C; substitute parts with extended ranges provide additional design margin.

Parameter Comparison

Parameter	DS75-12B (Main)	1N2288R	R304120	VS-150UR120D
Manufacturer	IXYS	Microchip Technology	Microchip Technology	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	1200 V	1000 V	1200 V	1200 V
Current - Average Rectified (Io)	110 A	40 A	40 A	150 A
Voltage - Forward (Vf) (Max) @ If	1.17 V @ 150 A	1.19 V @ 90 A	1.19 V @ 90 A	1.47 V @ 600 A
Current - Reverse Leakage @ Vr	6 mA @ 1200 V	10 µA @ 1000 V	10 µA @ 1200 V	Not specified
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Chassis, Stud Mount	Stud Mount	Stud Mount	Chassis, Stud Mount
Package / Case	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud	DO-205AA, DO-8, Stud
Operating Temperature - Junction	-40°C ~ 180°C	-65°C ~ 200°C	-65°C ~ 200°C	-40°C ~ 180°C
RoHS Status	ROHS3 Compliant	Not specified	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Voltage and Current Match):

The VS-150UR120D from Vishay General Semiconductor provides the closest electrical and mechanical match to the DS75-12B. Both components are rated for 1200 V and support higher current levels (150 A vs. 110 A), with identical mounting type (Chassis, Stud Mount) and compatible package specifications (DO-205AA vs. DO-203AB). Both maintain ROHS3 compliance and identical operating temperature ranges (-40°C to 180°C). This part is currently in active production status with 20,400 units in stock.

Voltage-Matched Substitute (Lower Current Rating):

The R304120 from Microchip Technology matches the 1200 V voltage rating but provides a reduced current rating of 40 A. This part is suitable for applications where the full 110 A capacity is not required. The R304120 is in active production status; however, it is RoHS non-compliant, which may restrict use in regulated applications. Extended operating temperature range (-65°C to 200°C) provides additional thermal margin.

Reduced Voltage Substitute:

The 1N2288R from Microchip Technology is rated for 1000 V, which is 200 V below the DS75-12B specification. This part is suitable only for applications where the circuit voltage does not exceed 1000 V. Current rating is 40 A. The 1N2288R is in active production status with extended operating temperature range (-65°C to 200°C) and does not specify RoHS compliance status.

Compliance Considerations:

For applications requiring ROHS3 compliance, the VS-150UR120D is the recommended substitute. The R304120, while voltage and package compatible, is RoHS non-compliant and should not be used in regulated applications. The 1N2288R compliance status is not specified in the provided data.

Frequently Asked Questions (FAQ)

Q: Can the 1N2288R be used as a direct replacement for the DS75-12B?

A: The 1N2288R is not a direct replacement. While it maintains compatible stud mount packaging (DO-203AB, DO-5), it is rated for only 1000 V reverse voltage compared to the DS75-12B's 1200 V rating. Use this part only in applications where circuit voltage does not exceed 1000 V. Current rating is also reduced to 40 A.

Q: What is the primary advantage of the VS-150UR120D as a substitute?

A: The VS-150UR120D provides the closest match to the DS75-12B in terms of voltage rating (1200 V), mounting type (Chassis, Stud Mount), and operating temperature range (-40°C to 180°C). It also maintains ROHS3 compliance and is in active production with high inventory availability (20,400 units). The higher current rating (150 A) provides additional design margin.

Q: Are there package differences between the DS75-12B and its substitutes?

A: The DS75-12B uses DO-203AB packaging. The 1N2288R and R304120 use DO-5 (DO-203AB) packaging, which is mechanically compatible. The VS-150UR120D uses DO-205AA (DO-8) packaging, which is a larger stud mount package. Mechanical fit and thermal interface characteristics may differ; verify mounting hardware compatibility in your application.

Q: Why is the R304120 marked as RoHS non-compliant?

A: The R304120 is RoHS non-compliant according to the provided specifications. Applications subject to RoHS regulations (such as consumer electronics in the European Union) cannot use this part. The VS-150UR120D is ROHS3 compliant and is the appropriate choice for regulated applications.

Q: Can I use a lower current-rated substitute if my application does not require 110 A?

A: Yes. The 1N2288R and R304120 are both rated for 40 A average rectified current. If your application current requirement is 40 A or less, these parts are electrically suitable. However, verify voltage rating compatibility: the 1N2288R is limited to 1000 V, while the R304120 supports 1200 V. Confirm RoHS compliance requirements before selecting the R304120.

Q: What is the difference in forward voltage drop between the DS75-12B and the VS-150UR120D?

A: The DS75-12B specifies 1.17 V forward voltage at 150 A, while the VS-150UR120D specifies 1.47 V at 600 A. These measurements are taken at different current levels, making direct comparison imprecise. The VS-150UR120D's higher forward voltage at higher current levels reflects its higher current capacity. Evaluate power dissipation impact in your specific application.

Q: Are all substitute parts available in the same packaging format?

A: No. The DS75-12B, 1N2288R, and R304120 all use DO-203AB/DO-5 stud mount packaging. The VS-150UR120D uses DO-205AA (DO-8) stud mount packaging, which is physically larger. Verify that your application's mounting hardware and thermal interface accommodate the larger package before selecting the VS-150UR120D.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message