Equivalent & Substitute Parts for 10BQ030

Part Overview

The 10BQ030 is a Schottky rectifier diode rated for 30 V DC reverse voltage and 1 A average rectified current in a DO-214AA (SMB) surface mount package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering improved availability and compliance status.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	420 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 30 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the 10BQ030 is determined by strict electrical and mechanical parameter matching within the Schottky diode rectifier category. The primary substitution criteria are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 1 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AA, SMB
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed 600 mV @ 1 A
Current - Reverse Leakage @ Vr: Must not exceed 1 mA @ 30 V
Operating Temperature - Junction: Must support -55°C to 150°C range or equivalent

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (functionally compatible with minor parameter variations). Parts with higher current ratings (3 A, 4 A) are listed for reference but are not direct substitutes due to different current specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Product Status	RoHS Status
10BQ030	Vishay General Semiconductor - Diodes Division	30	1	420 @ 1 A	500 @ 30 V	DO-214AA, SMB	Obsolete	RoHS non-compliant
VS-10BQ030HM3/5BT	Vishay General Semiconductor - Diodes Division	30	1	420 @ 1 A	500 @ 30 V	DO-214AA, SMB	Active	ROHS3 Compliant
B130B-13-F	Diodes Incorporated	30	1	500 @ 1 A	500 @ 30 V	DO-214AA, SMB	Active	ROHS3 Compliant
MBRS130T3G	onsemi	30	1	600 @ 1 A	1000 @ 30 V	DO-214AA, SMB	Active	ROHS3 Compliant
STPS130U	STMicroelectronics	30	1	550 @ 1 A	10 @ 30 V	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L30U	Vishay General Semiconductor - Diodes Division	30	1	420 @ 1 A	200 @ 30 V	DO-214AA, SMB	Obsolete	RoHS non-compliant
SK33B-LTP	Micro Commercial Co	30	3	500 @ 3 A	500 @ 30 V	DO-214AA, SMB	Not For New Designs	ROHS3 Compliant
SK43BL-TP	Micro Commercial Co	30	4	450 @ 4 A	500 @ 30 V	DO-214AA, SMB	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute (Parametric Equivalent): VS-10BQ030HM3/5BT is the direct parametric equivalent to the 10BQ030. This part maintains identical electrical specifications (30 V, 1 A, 420 mV forward voltage) while offering active product status and ROHS3 compliance. This part is recommended for direct replacement in new designs and production transitions.

Secondary Substitutes (Functionally Compatible): B130B-13-F (Diodes Incorporated), MBRS130T3G (onsemi), and STPS130U (STMicroelectronics) are functionally compatible alternatives. All three maintain the 30 V / 1 A electrical rating and DO-214AA package. These parts are active products with ROHS3 compliance. Forward voltage specifications vary (500 mV, 600 mV, and 550 mV respectively), which may affect circuit performance in applications with tight voltage budgets. STPS130U offers the lowest reverse leakage current (10 µA), beneficial for low-power applications.

Not Recommended for New Designs: STPS1L30U and SK33B-LTP are obsolete or marked "Not For New Designs" and should not be selected for new product development. SK33B-LTP and SK43BL-TP have current ratings of 3 A and 4 A respectively, exceeding the 1 A specification of the 10BQ030 and are not direct substitutes.

Compliance Considerations: All recommended active substitutes (VS-10BQ030HM3/5BT, B130B-13-F, MBRS130T3G, STPS130U) are ROHS3 compliant, addressing regulatory requirements for new designs. The original 10BQ030 is RoHS non-compliant and should be phased out in compliance-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the 10BQ030 be directly replaced with VS-10BQ030HM3/5BT? A: Yes. VS-10BQ030HM3/5BT is a parametric equivalent with identical electrical specifications (30 V, 1 A, 420 mV forward voltage) and the same DO-214AA package. This is the recommended direct replacement.

Q: What is the difference between the substitute parts in terms of forward voltage? A: Forward voltage varies across substitutes: VS-10BQ030HM3/5BT and STPS1L30U are 420 mV @ 1 A (matching the original), B130B-13-F is 500 mV @ 1 A, STPS130U is 550 mV @ 1 A, and MBRS130T3G is 600 mV @ 1 A. Higher forward voltage increases power dissipation and heat generation in the circuit.

Q: Are SK33B-LTP and SK43BL-TP suitable replacements? A: No. These parts have current ratings of 3 A and 4 A respectively, which exceed the 1 A specification of the 10BQ030. They are not direct substitutes and should not be used as replacements without circuit redesign.

Q: Why is ROHS3 compliance important for selecting a substitute? A: ROHS3 compliance is mandatory for products sold in regulated markets. The original 10BQ030 is RoHS non-compliant. All recommended active substitutes (VS-10BQ030HM3/5BT, B130B-13-F, MBRS130T3G, STPS130U) are ROHS3 compliant, ensuring regulatory compliance for new designs and production.

Q: Can I use MBRS130T3G as a substitute if forward voltage is not critical? A: MBRS130T3G is functionally compatible with the 10BQ030 in terms of voltage and current ratings. However, its forward voltage is 600 mV @ 1 A (compared to 420 mV for the original), and reverse leakage is 1 mA @ 30 V (compared to 500 µA). These differences result in higher power dissipation and may affect circuit performance in sensitive applications.

Q: What is the difference between "Obsolete" and "Not For New Designs" product status? A: Obsolete parts are no longer manufactured and have limited availability. "Not For New Designs" parts are still manufactured but are being phased out. Neither should be used in new product development. Active products (VS-10BQ030HM3/5BT, B130B-13-F, MBRS130T3G, STPS130U) are the appropriate choice for new designs.

Q: Does the package type affect substitution compatibility? A: All listed substitutes use the DO-214AA (SMB) surface mount package, which is mechanically and electrically compatible with the 10BQ030. Package compatibility is maintained across all recommended substitutes.

Q: Which substitute has the lowest reverse leakage current? A: STPS130U has the lowest reverse leakage current at 10 µA @ 30 V, compared to 500 µA for the original 10BQ030. This characteristic is beneficial for low-power or high-impedance circuit applications.

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