MBRS190T3G Equivalent & Substitute Parts

Part Overview

The MBRS190T3G is a Schottky rectifier diode manufactured by onsemi, rated for 90 V DC reverse voltage and 1 A average rectified current in a surface mount SMB (DO-214AA) package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching or superior electrical ratings within the same package family, enabling circuit designers to source alternative components when primary inventory is unavailable or when application requirements permit higher current or voltage ratings.

Key Parameters

Parameter	MBRS190T3G Value	Unit
Voltage - DC Reverse (Vr) (Max)	90	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 90 V	µA
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 175°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBRS190T3G is determined by the following criteria:

Mandatory Matching Parameters:

Package / Case: DO-214AA (SMB) surface mount configuration
Technology: Schottky diode
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Voltage - DC Reverse (Vr): Equal to or greater than 90 V
Current - Average Rectified (Io): Equal to or greater than 1 A
Voltage - Forward (Vf): Lower or equal values preferred for efficiency
Current - Reverse Leakage: Lower values preferred for performance
Operating Temperature Range: Must encompass or exceed -65°C to 175°C

Substitute parts are grouped into two categories: Direct Equivalents (matching 90 V / 1 A ratings) and Higher-Rated Alternatives (90 V / 2 A or 100 V / 2 A ratings suitable for applications with higher current headroom).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Reverse Leakage [µA @ V]	Tj (Max) [°C]	Package
MBRS190T3G	onsemi	90	1	750 @ 1A	500 @ 90V	175	DO-214AA (SMB)
B190BQ-13-F	Diodes Incorporated	90	1	790 @ 1A	500 @ 90V	150	DO-214AA (SMB)
STPS1H100U	STMicroelectronics	100	1	770 @ 1A	4 @ 100V	175	DO-214AA (SMB)
STPS1H100UY	STMicroelectronics	100	1	770 @ 1A	4 @ 100V	175	DO-214AA (SMB)
SS29	Taiwan Semiconductor Corporation	90	2	850 @ 2A	100 @ 90V	150	DO-214AA (SMB)
B290-13-F	Diodes Incorporated	90	2	790 @ 2A	7 @ 90V	150	DO-214AA (SMB)
SS2H9-E3/52T	Vishay General Semiconductor	90	2	790 @ 2A	10 @ 90V	175	DO-214AA (SMB)
SS2H9-E3/5BT	Vishay General Semiconductor	90	2	790 @ 2A	10 @ 90V	175	DO-214AA (SMB)
SS2H10-E3/52T	Vishay General Semiconductor	100	2	790 @ 2A	10 @ 100V	175	DO-214AA (SMB)
SS2H10-E3/5BT	Vishay General Semiconductor	100	2	790 @ 2A	10 @ 100V	175	DO-214AA (SMB)
B270-13-F	Diodes Incorporated	70	2	790 @ 2A	7 @ 70V	150	DO-214AA (SMB)

Engineering Selection Recommendations

Direct Equivalent (Same Electrical Rating):

B190BQ-13-F (Diodes Incorporated) is a direct functional equivalent to MBRS190T3G, matching the 90 V / 1 A specification. This part carries Automotive grade qualification (AEC-Q101) and is ROHS3 compliant. The forward voltage is slightly higher (790 mV vs. 750 mV @ 1 A), which represents a minor efficiency trade-off. Operating temperature maximum is 150°C versus 175°C for the MBRS190T3G. Selection of B190BQ-13-F is appropriate when automotive-qualified components are required or when Diodes Incorporated supply chain is preferred.

Higher Current Rating (90 V / 2 A):

B290-13-F, SS2H9-E3/52T, and SS2H9-E3/5BT all provide 90 V / 2 A ratings in the same DO-214AA package. These parts are suitable for applications where the circuit can tolerate higher current capacity without modification. B290-13-F (Diodes Incorporated) and SS2H9 variants (Vishay) both exhibit lower reverse leakage (7–10 µA @ 90 V) compared to the MBRS190T3G (500 µA @ 90 V), indicating superior leakage performance. SS2H9 variants maintain the full -65°C to 175°C temperature range. Selection of 2 A rated parts is appropriate when circuit design permits higher current handling or when improved leakage characteristics are beneficial.

Higher Voltage Rating (100 V / 1 A):

STPS1H100U and STPS1H100UY (STMicroelectronics) provide 100 V / 1 A ratings, offering increased voltage margin over the 90 V specification. Both parts exhibit significantly lower reverse leakage (4 µA @ 100 V) and maintain the full -65°C to 175°C operating range. STPS1H100UY carries Automotive grade qualification. These parts are suitable for applications requiring higher voltage headroom or when STMicroelectronics supply chain is preferred.

Higher Voltage and Current (100 V / 2 A):

SS2H10-E3/52T and SS2H10-E3/5BT (Vishay) provide 100 V / 2 A ratings with low reverse leakage (10 µA @ 100 V) and full temperature range support (-65°C to 175°C). These parts offer maximum electrical margin and are suitable for applications with higher current and voltage requirements.

Not Recommended:

B270-13-F (Diodes Incorporated) is rated for 70 V maximum reverse voltage, which is below the MBRS190T3G specification of 90 V. This part does not meet the voltage requirement and is not suitable as a substitute.

Compliance Summary:

All recommended substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are classified as Active product status. All parts are surface mount DO-214AA (SMB) package configuration.

Frequently Asked Questions (FAQ)

Q: Can STPS1H100U replace MBRS190T3G in a 90 V / 1 A application?

A: Yes. STPS1H100U is rated for 100 V / 1 A, which exceeds the MBRS190T3G specification of 90 V / 1 A. The higher voltage rating provides additional safety margin. Forward voltage is comparable (770 mV vs. 750 mV @ 1 A). Reverse leakage is significantly lower (4 µA vs. 500 µA @ rated voltage). The part is pin-compatible in DO-214AA package and ROHS3 compliant.

Q: What is the difference between B190BQ-13-F and MBRS190T3G?

A: Both parts are rated 90 V / 1 A Schottky diodes in DO-214AA package. B190BQ-13-F is manufactured by Diodes Incorporated and carries Automotive grade qualification (AEC-Q101). Forward voltage is 790 mV versus 750 mV for MBRS190T3G at 1 A. Maximum junction temperature is 150°C for B190BQ-13-F versus 175°C for MBRS190T3G. Both are ROHS3 compliant and MSL 1.

Q: Can I use a 2 A rated diode (such as B290-13-F) in place of the 1 A MBRS190T3G?

A: Yes. B290-13-F is rated 90 V / 2 A and is pin-compatible in the same DO-214AA package. The higher current rating does not create a functional problem in a 1 A application; the diode will operate within its safe operating area. Reverse leakage is improved (7 µA vs. 500 µA @ 90 V). Forward voltage is comparable (790 mV @ 2 A). This substitution is appropriate when higher current capacity is available in inventory or when improved leakage performance is desired.

Q: Why does SS29 have higher forward voltage (850 mV @ 2 A) compared to other 90 V / 2 A parts?

A: Forward voltage varies with manufacturing process and die design. SS29 (Taiwan Semiconductor Corporation) exhibits 850 mV @ 2 A, while B290-13-F and SS2H9 variants show 790 mV @ 2 A. The difference reflects different semiconductor technology and process optimization. For 1 A operation, the actual forward voltage of SS29 would be lower than the 2 A specification. Selection should consider total power dissipation requirements in the specific application.

Q: Are STPS1H100U and STPS1H100UY interchangeable?

A: Both parts are rated 100 V / 1 A with identical electrical specifications (770 mV Vf @ 1 A, 4 µA reverse leakage @ 100 V). STPS1H100UY carries Automotive grade qualification and operates over -40°C to 175°C. STPS1H100U does not specify automotive qualification and operates to 175°C maximum. In non-automotive applications, both parts are functionally equivalent. In automotive applications, STPS1H100UY is the appropriate selection.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. The part can be stored indefinitely without special moisture control measures and does not require baking before soldering. This classification applies to all listed substitute parts and the MBRS190T3G.

Q: Can B270-13-F be used as a substitute for MBRS190T3G?

A: No. B270-13-F is rated for 70 V maximum reverse voltage, which is below the MBRS190T3G specification of 90 V. Using this part in a 90 V application would exceed its voltage rating and create risk of diode failure. This part is not suitable as a substitute.

Q: What is the significance of the "Fast Recovery ≤ 500ns" specification?

A: Fast recovery time indicates the diode can switch off quickly when reverse biased, reducing reverse recovery charge. All listed substitute parts meet this specification (≤ 500ns for currents > 200 mA). This characteristic is important in switching power supplies and high-frequency rectification circuits. All parts in this comparison are functionally equivalent in this regard.

Q: Does packaging type (Cut Tape vs. Tape & Reel) affect electrical performance?

A: No. Packaging type (Cut Tape, Tape & Reel, or Digi-Reel) affects only handling, storage, and assembly logistics. Electrical performance and specifications are identical regardless of packaging format. Selection between packaging types should be based on manufacturing process requirements and inventory management practices.

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