STPS1045BTRL Equivalent & Substitute Parts

Part Overview

The STPS1045BTRL 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-252AA (DPAK) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with acceptable parameter variations within engineering tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	10	A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 10 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200 µA @ 45 V	µA
Capacitance @ Vr, F	760pF @ 5V, 1MHz	pF
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-40°C ~ 175°C	°C
Technology	Schottky	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution logic for the STPS1045BTRL is based on the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io): 10 A minimum
Voltage - Forward (Vf) (Max) @ If: 630 mV maximum at 10 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 200 µA maximum at 45 V

Mechanical Compatibility Requirements:

Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Operating Temperature - Junction: -40°C ~ 175°C minimum

Compliance Requirements:

RoHS Status: ROHS3 Compliant (for active parts)
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Vishay Parametric Equivalents (STPS1045 Base Series) Parts VS-10WQ045FNTR-M3, VS-10WQ045FNTRHM3, VS-10WQ045FNTRL-M3, VS-10WQ045FNTRLHM3, VS-STPS1045BTR-M3, VS-STPS1045BTRL-M3, and VS-STPS1045BTRR-M3 maintain identical electrical specifications with the main part. These parts are active, RoHS3 compliant, and available in Tape & Reel packaging. Variants with "HM3" designation include automotive-grade qualification (AEC-Q101). Reverse leakage current differs between STPS1045 base series (200 µA) and 10WQ045 base series (1 mA), both within acceptable limits.

Category 2: Diodes Incorporated Super Barrier Alternatives (SBR Series) Parts SBR1045D1-13, SBR1045D1Q-13, and SBR10U45D1-13 employ Super Barrier technology and provide functional substitution with acceptable parameter variations. Forward voltage is reduced to 570–580 mV at 10 A, and reverse leakage current is 500 µA at 45 V. Operating temperature range is -65°C ~ 150°C. These parts are active and RoHS3 compliant.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) @ 10A [mV]	Speed	Ir @ 45V [µA]	Package	RoHS Status	Automotive Grade
STPS1045BTRL	Vishay	Obsolete	45	10	630	Fast Recovery ≤ 500ns	200	TO-252-3 DPAK	Non-compliant	No
VS-10WQ045FNTR-M3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	1000	TO-252-3 DPAK	ROHS3 Compliant	No
VS-10WQ045FNTRHM3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	1000	TO-252-3 DPAK	ROHS3 Compliant	Yes (AEC-Q101)
VS-10WQ045FNTRL-M3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	1000	TO-252-3 DPAK	ROHS3 Compliant	No
VS-10WQ045FNTRLHM3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	1000	TO-252-3 DPAK	ROHS3 Compliant	Yes (AEC-Q101)
VS-STPS1045BTR-M3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	200	TO-252-3 DPAK	ROHS3 Compliant	No
VS-STPS1045BTRL-M3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	200	TO-252-3 DPAK	ROHS3 Compliant	No
VS-STPS1045BTRR-M3	Vishay	Active	45	10	630	Fast Recovery ≤ 500ns	200	TO-252-3 DPAK	ROHS3 Compliant	No
SBR1045D1-13	Diodes Inc.	Active	45	10	580	Fast Recovery ≤ 500ns	500	TO-252-3 DPAK	ROHS3 Compliant	No
SBR1045D1Q-13	Diodes Inc.	Active	45	10	580	Standard Recovery >500ns	500	TO-252-3 DPAK	ROHS3 Compliant	Yes (AEC-Q101)
SBR10U45D1-13	Diodes Inc.	Active	45	10	570	Standard Recovery >500ns	500	TO-252-3 DPAK	ROHS3 Compliant	No

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select VS-STPS1045BTR-M3, VS-STPS1045BTRL-M3, or VS-STPS1045BTRR-M3 from Vishay. These parts maintain the original STPS1045 base series specifications with 200 µA reverse leakage current at 45 V and 630 mV forward voltage at 10 A. All three are active, RoHS3 compliant, and available in Tape & Reel packaging with high inventory levels (30,200, 811, and 3,767 units respectively). These parts provide the closest functional match to the obsolete STPS1045BTRL.

For Automotive Applications:

Select VS-10WQ045FNTRHM3 or VS-10WQ045FNTRLHM3 from Vishay for automotive-qualified designs. Both parts carry AEC-Q101 qualification and ROHS3 compliance. The VS-10WQ045FNTRLHM3 offers the highest inventory availability (45,100 units). These parts feature 1 mA reverse leakage current at 45 V, which is acceptable for automotive rectification circuits. Alternatively, select SBR1045D1Q-13 from Diodes Incorporated, which includes AEC-Q101 qualification and Super Barrier technology with reduced forward voltage (580 mV at 10 A).

For General Industrial Applications:

Select VS-10WQ045FNTR-M3 or VS-10WQ045FNTRL-M3 from Vishay for non-automotive applications. Both maintain identical electrical specifications to the main part with 1 mA reverse leakage current and are RoHS3 compliant. Inventory availability is 10,200 and 955 units respectively.

For Forward Voltage Optimization:

Select SBR10U45D1-13 from Diodes Incorporated when reduced forward voltage is beneficial. This part delivers 570 mV at 10 A, reducing power dissipation compared to the 630 mV specification of the original part. Operating temperature range is -65°C ~ 150°C. Inventory availability is 19,075 units.

All recommended substitute parts are housed in identical TO-252-3 DPAK packages with the same pinout and thermal characteristics, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can VS-STPS1045BTR-M3 be used as a direct replacement for STPS1045BTRL?

A: Yes. VS-STPS1045BTR-M3 is a direct parametric equivalent. Both parts share identical electrical specifications: 45 V reverse voltage, 10 A average rectified current, 630 mV forward voltage at 10 A, and 200 µA reverse leakage current at 45 V. Both use the TO-252-3 DPAK package. The primary difference is that VS-STPS1045BTR-M3 is active and RoHS3 compliant, whereas STPS1045BTRL is obsolete and RoHS non-compliant.

Q: What is the difference between the Vishay 10WQ045 and STPS1045 base series?

A: Both series are Schottky rectifiers rated for 45 V and 10 A in TO-252-3 DPAK packages. The primary electrical difference is reverse leakage current: STPS1045 series specifies 200 µA at 45 V, while 10WQ045 series specifies 1 mA at 45 V. Both values are within acceptable limits for most rectification applications. The 10WQ045 series offers higher inventory availability and includes automotive-qualified variants (AEC-Q101).

Q: Are Diodes Incorporated SBR parts compatible with the STPS1045BTRL?

A: SBR parts are functional substitutes with acceptable parameter variations. All SBR variants (SBR1045D1-13, SBR1045D1Q-13, SBR10U45D1-13) maintain 45 V reverse voltage and 10 A current rating in identical TO-252-3 DPAK packages. Forward voltage is reduced to 570–580 mV at 10 A (compared to 630 mV), and reverse leakage current is 500 µA at 45 V (compared to 200 µA). These differences are acceptable for most applications and provide improved efficiency due to lower forward voltage drop.

Q: Which substitute part should be selected for automotive applications?

A: For automotive applications, select either VS-10WQ045FNTRHM3 or VS-10WQ045FNTRLHM3 from Vishay, or SBR1045D1Q-13 from Diodes Incorporated. All three parts carry AEC-Q101 automotive qualification and ROHS3 compliance. VS-10WQ045FNTRLHM3 offers the highest inventory availability (45,100 units) and is recommended for new automotive designs.

Q: What is the impact of reverse leakage current differences between substitute parts?

A: Reverse leakage current affects standby power consumption and thermal performance. The original STPS1045BTRL specifies 200 µA at 45 V. Vishay 10WQ045 series specifies 1 mA (5× higher), and Diodes Incorporated SBR series specifies 500 µA (2.5× higher). In most rectification circuits, these differences are negligible. In high-impedance or precision analog circuits, the lower leakage of STPS1045 series (200 µA) may be preferred.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All recommended substitute parts are available in Tape & Reel (TR) packaging suitable for automated assembly. The original STPS1045BTRL was supplied in bulk; all active equivalents are supplied in Tape & Reel format with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature range difference between Vishay and Diodes Incorporated parts?

A: Vishay Schottky rectifiers (STPS1045 and 10WQ045 series) operate from -40°C to 175°C junction temperature. Diodes Incorporated SBR parts operate from -65°C to 150°C junction temperature. For applications requiring operation above 150°C, Vishay parts are required. For applications requiring operation below -40°C, Diodes Incorporated parts are required.

Q: Can forward voltage reduction from 630 mV to 570 mV affect circuit performance?

A: Forward voltage reduction improves efficiency by decreasing power dissipation in the diode. In rectifier circuits, this typically results in lower junction temperature and improved thermal performance. In precision voltage reference or biasing circuits, the 60 mV reduction may require circuit adjustment. Evaluate application-specific requirements before selecting SBR parts for forward voltage optimization.

Q: What is the significance of "Fast Recovery" versus "Standard Recovery" speed specifications?

A: Fast Recovery (≤ 500ns) reduces switching losses and is preferred in high-frequency switching applications. Standard Recovery (> 500ns) is acceptable for line-frequency rectification and lower-frequency applications. SBR1045D1Q-13 and SBR10U45D1-13 specify Standard Recovery, while all other recommended parts specify Fast Recovery. For applications operating above 10 kHz, select Fast Recovery parts.

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