BAS70Q-7-F Equivalent & Substitute Parts

Part Overview

The BAS70Q-7-F is a Schottky rectifier diode manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This component operates at 70 V DC reverse voltage with a 70 mA average rectified current rating and is classified as a small signal diode. The part is actively produced and carries automotive-grade qualification under AEC-Q101 standards with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. Alternative sources and packaging formats may be required due to inventory availability, supply chain considerations, or specific manufacturing process requirements.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io)	70	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA	—
Current - Reverse Leakage @ Vr	100	nA @ 50 V
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Operating Temperature - Junction	-55 to 125	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BAS70Q-7-F are qualified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Primary Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 70 V
Current - Average Rectified (Io): 70 mA
Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA
Technology: Schottky
Package / Case: TO-236-3, SC-59, SOT-23-3
Operating Temperature - Junction: -55°C to 125°C
Mounting Type: Surface Mount
Capacitance @ Vr, F: 2 pF @ 0V, 1MHz

Secondary Compatibility Parameters:

Current - Reverse Leakage @ Vr: 100 nA @ 50 V (with noted exceptions)
Reverse Recovery Time (trr): 5 ns or 100 ps (where specified)
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

All identified substitutes maintain the core electrical specifications and package compatibility required for direct functional replacement in applications designed for the BAS70Q-7-F.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	Ir @ Vr [nA]	Capacitance [pF]	Trr [ns/ps]	Package	Packaging Format
BAS70Q-7-F	Diodes Incorporated	70	70	1 @ 15 mA	100 @ 50 V	2 @ 0V, 1MHz	—	SOT-23-3	Tape & Reel (TR)
BAS70-7-F	Diodes Incorporated	70	70	1 @ 15 mA	100 @ 50 V	2 @ 0V, 1MHz	5	SOT-23-3	Cut Tape (CT) & Digi-Reel®
BAS70 RFG	Taiwan Semiconductor Corporation	70	70	1 @ 15 mA	100 @ 50 V	2 @ 0V, 1MHz	5	SOT-23-3	Tape & Reel (TR)
BAS70-TP	Micro Commercial Co	70	70	1 @ 15 mA	200 @ 50 V	2 @ 0V, 1MHz	5	SOT-23-3	Tape & Reel (TR)
BAS70E6327HTSA1	Infineon Technologies	70	70	1 @ 15 mA	100 @ 50 V	2 @ 0V, 1MHz	0.1	SOT-23-3	Tape & Reel (TR)
BAS70E6433HTMA1	Infineon Technologies	70	70	1 @ 15 mA	100 @ 50 V	2 @ 0V, 1MHz	0.1	SOT-23-3	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitute (Identical Manufacturer): BAS70-7-F from Diodes Incorporated is the direct equivalent with identical electrical specifications. The difference in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) does not affect electrical performance. This part is recommended when supply from the original manufacturer is preferred and inventory availability permits.

Cross-Manufacturer Substitutes: BAS70 RFG (Taiwan Semiconductor Corporation), BAS70-TP (Micro Commercial Co), BAS70E6327HTSA1, and BAS70E6433HTMA1 (Infineon Technologies) all maintain the core electrical parameters required for functional equivalence. All substitute parts carry RoHS3 compliance and MSL 1 ratings consistent with the primary part.

Parameter Variance Considerations: BAS70-TP exhibits a reverse leakage current specification of 200 nA @ 50 V, which is elevated relative to the 100 nA @ 50 V baseline. This variance remains within acceptable limits for small signal Schottky diode applications but should be evaluated against specific circuit leakage requirements.

Infineon parts (BAS70E6327HTSA1 and BAS70E6433HTMA1) specify reverse recovery time at 100 picoseconds, which is superior to the 5 nanosecond specification of other alternatives. This characteristic does not preclude substitution but indicates enhanced switching performance.

Compliance Status: All identified substitutes maintain active product status, RoHS3 compliance, and unlimited moisture sensitivity ratings. No compliance barriers exist for direct substitution in applications requiring the BAS70Q-7-F.

Frequently Asked Questions (FAQ)

Q: Can BAS70-7-F be used as a direct replacement for BAS70Q-7-F? A: Yes. BAS70-7-F maintains identical electrical specifications including reverse voltage, forward current, forward voltage drop, and reverse leakage current. The packaging format difference (Cut Tape & Digi-Reel® versus Tape & Reel) does not affect electrical performance or mechanical compatibility in the SOT-23-3 package.

Q: What is the significance of the reverse recovery time (trr) differences between substitutes? A: Reverse recovery time indicates the speed at which the diode transitions from forward conduction to reverse blocking. The BAS70Q-7-F does not specify this parameter. Substitutes with specified trr values (5 ns or 100 ps) will perform equivalently or superiorly in switching applications. Faster recovery times (100 ps from Infineon parts) provide enhanced performance in high-frequency circuits without compromising compatibility.

Q: Why does BAS70-TP show a higher reverse leakage current specification? A: BAS70-TP specifies 200 nA @ 50 V compared to 100 nA @ 50 V for other parts. This represents a manufacturing tolerance variation within the Schottky diode category. For applications sensitive to leakage current, parts with 100 nA specifications are preferred. For general-purpose rectification, the 200 nA specification remains acceptable.

Q: Are all substitute parts suitable for automotive applications? A: The BAS70Q-7-F carries AEC-Q101 automotive qualification. While substitute parts maintain equivalent electrical specifications and RoHS3 compliance, automotive qualification status is not explicitly stated for all alternatives. Applications requiring formal automotive qualification should confirm AEC-Q101 status with the respective manufacturer before selection.

Q: What packaging format differences exist among substitutes? A: All substitutes are supplied in Tape & Reel (TR) format or Cut Tape & Digi-Reel® format. These are standard surface mount packaging methods that do not affect electrical performance. Selection between formats depends on assembly process requirements and inventory management practices.

Q: Can substitutes be intermixed in production? A: Yes, provided the application circuit does not impose specific constraints on reverse leakage current or reverse recovery time. For applications with tight leakage specifications, maintain consistency with parts specifying 100 nA @ 50 V. For switching applications benefiting from faster recovery, Infineon parts with 100 ps trr are suitable. Mixed sourcing is acceptable when electrical parameters remain within circuit design tolerances.

Q: Is the SOT-23-3 package identical across all manufacturers? A: Yes. All substitutes use the TO-236-3 / SC-59 / SOT-23-3 package designation, which is a standardized three-lead surface mount package. Physical dimensions, lead spacing, and PCB footprint are identical across all listed parts, ensuring mechanical interchangeability.

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