DSB80C45HB Equivalent & Substitute Parts

Part Overview

The DSB80C45HB is an IXYS Schottky diode array configured as 1 pair common cathode with 45 V reverse voltage rating and 40 A average rectified current per diode. The device is packaged in TO-247-3 through-hole configuration and is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent electrical and mechanical parameters are required for applications where the original part is unavailable, discontinued, or when alternative manufacturers' components meet the specified performance criteria within the allowed parameter ranges.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	40	A
Voltage - Forward (Vf) (Max) @ If	620 mV @ 40 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	15	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DSB80C45HB is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Package / Case: TO-247-3
Mounting Type: Through Hole

Current Rating Grouping: Substitute parts are grouped by average rectified current (Io) per diode. The DSB80C45HB operates at 40 A and is directly substitutable only with parts rated at 40 A or higher. Parts rated below 40 A (15 A and 20 A variants) are not direct substitutes due to insufficient current capacity. Parts rated at 30 A fall below the 40 A requirement and are not equivalent.

Electrical Performance Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range are secondary parameters that vary among substitute candidates but do not disqualify substitution when primary parameters are met.

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vr (V)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (°C)	Package
DSB80C45HB	IXYS	40	45	620 mV @ 40 A	15 mA @ 45 V	-55 to 150	TO-247-3
STPS40L45CW	STMicroelectronics	20	45	530 mV @ 20 A	600 µA @ 45 V	Max 150	TO-247-3
STPS4045CWY	STMicroelectronics	20	45	760 mV @ 20 A	200 µA @ 45 V	-40 to 175	TO-247-3
STPS60L45CW	STMicroelectronics	30	45	550 mV @ 30 A	1.5 mA @ 45 V	Max 150	TO-247-3
STPS6045CW	STMicroelectronics	30	45	630 mV @ 30 A	500 µA @ 45 V	Max 175	TO-247-3
STPS61L45CW	STMicroelectronics	30	45	560 mV @ 30 A	1.5 mA @ 45 V	Max 150	TO-247-3
STPS3045CW	STMicroelectronics	15	45	570 mV @ 15 A	200 µA @ 45 V	Max 200	TO-247-3
STPS30L45CW	STMicroelectronics	15	45	550 mV @ 15 A	400 µA @ 45 V	Max 150	TO-247-3

Engineering Selection Recommendations

Direct Substitution Status:

No STMicroelectronics parts listed meet the 40 A current requirement of the DSB80C45HB. All substitute candidates are rated at 20 A or below. The DSB80C45HB cannot be directly replaced by the provided substitute parts without circuit redesign or parallel configuration.

Partial Substitution Consideration:

If application requirements permit operation at reduced current capacity, the following parts maintain electrical equivalence at their respective current ratings:

STPS4045CWY and STPS40L45CW (20 A rating): Suitable for applications requiring 20 A or less. STPS4045CWY includes AEC-Q101 automotive qualification and extended operating temperature range (-40°C to 175°C). Both maintain 45 V reverse voltage and TO-247-3 package compatibility.
STPS6045CW, STPS60L45CW, and STPS61L45CW (30 A rating): Suitable for applications requiring 30 A or less. All maintain 45 V reverse voltage and TO-247-3 package compatibility. STPS6045CW supports maximum junction temperature of 175°C.

Compliance Status:

All listed parts are ROHS3 compliant, REACH unaffected, and classified as Active product status. All parts are packaged in TO-247-3 through-hole configuration with identical mounting type.

Frequently Asked Questions (FAQ)

Q: Can STPS40L45CW or STPS4045CWY directly replace DSB80C45HB?

A: No. These parts are rated at 20 A average rectified current, while DSB80C45HB is rated at 40 A. Direct substitution is not possible without circuit modification. These parts are suitable only for applications designed for 20 A operation.

Q: What is the primary difference between STPS4045CWY and STPS40L45CW?

A: Both are rated at 20 A and 45 V. STPS4045CWY includes AEC-Q101 automotive qualification and operates from -40°C to 175°C. STPS40L45CW operates to a maximum of 150°C and has lower forward voltage (530 mV vs. 760 mV at 20 A).

Q: Are the 30 A parts (STPS6045CW, STPS60L45CW, STPS61L45CW) suitable substitutes?

A: These parts maintain the same 45 V reverse voltage rating and TO-247-3 package as DSB80C45HB but are rated at 30 A, which is below the 40 A requirement. They are not direct substitutes for 40 A applications.

Q: Do all substitute parts use the same package?

A: Yes. All listed substitute parts use TO-247-3 through-hole package, identical to DSB80C45HB. Mechanical mounting compatibility is maintained across all candidates.

Q: What is the significance of the "L" designation in part numbers like STPS40L45CW?

A: The "L" designation indicates a variant within the STMicroelectronics product line. Electrical specifications differ from non-L variants (forward voltage, reverse leakage). Both L and non-L variants maintain the same current and voltage ratings.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of DSB80C45HB.

Q: Can multiple lower-rated parts be paralleled to achieve 40 A capacity?

A: Parallel configuration is outside the scope of this equivalence reference. Circuit design considerations for parallel diode operation require application-specific engineering analysis.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message