Equivalent & Substitute Parts for 10WQ045FN

Part Overview

The 10WQ045FN is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 45 V DC reverse voltage and 10 A average rectified current in a surface mount TO-252-3 DPAK package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature - Junction	-40°C ~ 175°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the 10WQ045FN is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io): 10 A
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Technology: Schottky or Super Barrier (functionally compatible rectifier technology)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents (Vishay) Parts VS-10WQ045FNHM3 and VS-STPS1045B-M3 maintain identical electrical specifications and package configuration. These parts are manufactured by Vishay and offer active product status with RoHS3 compliance.

Category 2: Cross-Manufacturer Equivalents Parts from onsemi (MBRD1045T4G), STMicroelectronics (STPS1045B, STPS1045B-TR), SMC Diode Solutions (MBRD1045, MBRD1045CT), and Diodes Incorporated (SBR1045D1-13) meet the core electrical and mechanical requirements. Variations in forward voltage, reverse leakage current, and operating temperature ranges are noted but do not preclude functional substitution within the specified parameter envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Package	Product Status	RoHS Status
10WQ045FN	Vishay	45 V	10 A	630 mV @ 10 A	1 mA @ 45 V	TO-252-3 DPAK	Obsolete	Non-compliant
VS-10WQ045FNHM3	Vishay	45 V	10 A	630 mV @ 10 A	1 mA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
VS-STPS1045B-M3	Vishay	45 V	10 A	630 mV @ 10 A	200 µA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
MBRD1045T4G	onsemi	45 V	10 A	840 mV @ 20 A	100 µA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
MBRD1045	SMC Diode Solutions	45 V	10 A	700 mV @ 10 A	1 mA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
STPS1045B	STMicroelectronics	45 V	10 A	630 mV @ 10 A	100 µA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
STPS1045B-TR	STMicroelectronics	45 V	10 A	630 mV @ 10 A	100 µA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant
SBR1045D1-13	Diodes Incorporated	45 V	10 A	580 mV @ 10 A	500 µA @ 45 V	TO-252-3 DPAK	Active	RoHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: VS-10WQ045FNHM3

VS-10WQ045FNHM3 is the direct equivalent replacement for the obsolete 10WQ045FN. Manufactured by Vishay, this part maintains identical electrical specifications including forward voltage (630 mV @ 10 A) and reverse leakage current (1 mA @ 45 V). The part carries active product status and RoHS3 compliance, making it suitable for new designs and production environments with regulatory requirements.

Secondary Recommendation: STPS1045B or STPS1045B-TR

STPS1045B and STPS1045B-TR, manufactured by STMicroelectronics, provide electrical equivalence with identical forward voltage characteristics (630 mV @ 10 A) and reduced reverse leakage current (100 µA @ 45 V). Both variants are active products with RoHS3 compliance. STPS1045B-TR is supplied in Cut Tape & Digi-Reel® packaging, while STPS1045B is supplied in Tube packaging.

Alternative Recommendation: MBRD1045T4G

MBRD1045T4G, manufactured by onsemi under the SWITCHMODE™ series, meets all core electrical and mechanical requirements. This part is active with RoHS3 compliance and offers extended operating temperature range (-65°C ~ 175°C). Forward voltage specification is measured at 20 A (840 mV), which is higher than the original part specification at 10 A but remains within acceptable operating parameters for 45 V, 10 A applications.

Compliance Consideration: MBRD1045

MBRD1045, manufactured by SMC Diode Solutions, is electrically equivalent with forward voltage of 700 mV @ 10 A. This part carries REACH Affected status, requiring compliance verification for applications subject to REACH regulations. RoHS3 compliance is confirmed.

Super Barrier Technology Alternative: SBR1045D1-13

SBR1045D1-13, manufactured by Diodes Incorporated, employs Super Barrier rectifier technology and delivers superior forward voltage performance (580 mV @ 10 A). This part is active with RoHS3 compliance and REACH Unaffected status. Reverse leakage current is elevated at 500 µA @ 45 V compared to the original specification.

Frequently Asked Questions (FAQ)

Q: Can VS-10WQ045FNHM3 be used as a direct replacement for 10WQ045FN?

A: Yes. VS-10WQ045FNHM3 is a direct parametric equivalent with identical voltage rating (45 V), current rating (10 A), forward voltage (630 mV @ 10 A), reverse leakage current (1 mA @ 45 V), and package configuration (TO-252-3 DPAK). The part is active and RoHS3 compliant.

Q: What is the difference between STPS1045B and STPS1045B-TR?

A: Both parts are electrically identical with 45 V rating, 10 A current, and 630 mV forward voltage @ 10 A. The difference is packaging: STPS1045B is supplied in Tube packaging, while STPS1045B-TR is supplied in Cut Tape & Digi-Reel® format. Selection depends on production equipment and handling requirements.

Q: Is the DPAK package identical across all substitute parts?

A: Yes. All substitute parts use the TO-252-3 DPAK (2 Leads + Tab), SC-63 package configuration, ensuring mechanical and thermal compatibility with the original 10WQ045FN footprint.

Q: Why does MBRD1045T4G have a higher forward voltage specification (840 mV @ 20 A) compared to the original part (630 mV @ 10 A)?

A: Forward voltage is measured at different current levels. MBRD1045T4G specifies Vf at 20 A, while the original part specifies Vf at 10 A. At the rated 10 A operating point, MBRD1045T4G will exhibit lower forward voltage than the specified 840 mV value. This part remains functionally equivalent for 45 V, 10 A applications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed carry RoHS3 compliance except the original 10WQ045FN, which is RoHS non-compliant. MBRD1045 and MBRD1045CT carry REACH Affected status, requiring compliance verification for applications subject to REACH regulations. All other parts are REACH Unaffected.

Q: What is the operating temperature range difference between substitute parts?

A: The original 10WQ045FN operates from -40°C to 175°C. VS-10WQ045FNHM3 and VS-STPS1045B-M3 maintain this range. MBRD1045T4G and SBR1045D1-13 extend the lower limit to -65°C. MBRD1045 and MBRD1045CT limit the upper temperature to 150°C. Selection depends on application thermal requirements.

Q: Can SBR1045D1-13 be used in place of 10WQ045FN despite higher reverse leakage current?

A: SBR1045D1-13 meets the core electrical and mechanical requirements for 45 V, 10 A operation in the TO-252-3 DPAK package. The reverse leakage current of 500 µA @ 45 V is higher than the original specification of 1 mA @ 45 V, but this difference does not preclude functional substitution. Application-specific leakage current tolerance must be evaluated.

Q: What is the inventory status of substitute parts?

A: VS-10WQ045FNHM3 has 33,138 pieces in stock. VS-STPS1045B-M3 has 30,200 pieces. MBRD1045T4G has 40,649 pieces. STPS1045B-TR has 5,405 pieces. STPS1045B has 1,228 pieces. MBRD1045 has 3,300 pieces. SBR1045D1-13 has 30,200 pieces. Inventory levels support production requirements for all listed alternatives.

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