BAS70 RFG Equivalent & Substitute Parts

Part Overview

The BAS70 RFG is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 70 V DC reverse voltage and 70 mA average rectified current in a surface mount SOT-23 package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 70 V / 70 mA Schottky diode functionality in SOT-23 form factor.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io)	70	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA	V @ mA
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	100	nA @ 50 V
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction	-55 to 125	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BAS70 RFG is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

Voltage - DC Reverse (Vr) (Max): 70 V
Current - Average Rectified (Io): 70 mA
Voltage - Forward (Vf) (Max) @ If: 1 V @ 15 mA
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 125°C
Technology: Schottky
RoHS Status: ROHS3 Compliant

All identified substitute parts meet these core electrical and mechanical requirements. Variations in secondary parameters such as reverse recovery time (trr), reverse leakage current, and packaging format (Tape & Reel vs. Cut Tape) do not preclude substitution when the critical parameters remain within specification. Automotive-grade variants with AEC-Q101 qualification are included as substitutes for applications requiring enhanced reliability screening.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V @ mA]	trr [ns/ps]	Reverse Leakage @ Vr [nA]	Capacitance @ Vr [pF]	Package	Packaging Format	Grade	Inventory [Pcs]
BAS70 RFG	Taiwan Semiconductor Corporation	70	70	1 @ 15	5 ns	100 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Standard	673
BAS70-7-F	Diodes Incorporated	70	70	1 @ 15	5 ns	100 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Cut Tape (CT) & Digi-Reel®	Standard	125100
BAS70-TP	Micro Commercial Co	70	70	1 @ 15	5 ns	200 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Standard	24150
BAS70E6327HTSA1	Infineon Technologies	70	70	1 @ 15	100 ps	100 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Standard	29638
BAS70E6433HTMA1	Infineon Technologies	70	70	1 @ 15	100 ps	100 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Standard	30703
BAS70HE3-TP	Micro Commercial Co	70	70	1 @ 15	5 ns	200 @ 70 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Automotive	5618
BAS70Q-7-F	Diodes Incorporated	70	70	1 @ 15	Not specified	100 @ 50 V	2 @ 0V, 1MHz	SOT-23-3	Tape & Reel (TR)	Automotive	1422

Engineering Selection Recommendations

Standard Applications (Non-Automotive): The BAS70-7-F (Diodes Incorporated) and BAS70-TP (Micro Commercial Co) are direct electrical equivalents with identical reverse recovery time and forward voltage characteristics. BAS70-7-F offers the highest inventory availability (125,100 pcs) and is supplied in Cut Tape format with Digi-Reel® packaging. BAS70-TP is available in Tape & Reel format matching the original BAS70 RFG packaging specification.

Infineon Variants (BAS70E6327HTSA1, BAS70E6433HTMA1): These parts exhibit superior reverse recovery time performance (100 ps vs. 5 ns) while maintaining all other critical electrical parameters. Both are ROHS3 compliant and available in high inventory quantities (29,638 and 30,703 pcs respectively). These variants are suitable for applications where faster switching performance provides system-level benefits.

Automotive-Grade Substitutes (BAS70HE3-TP, BAS70Q-7-F): Both parts carry AEC-Q101 automotive qualification and are suitable for automotive and industrial applications requiring enhanced reliability screening. BAS70HE3-TP is manufactured by Micro Commercial Co with reverse leakage specification at 70 V. BAS70Q-7-F is manufactured by Diodes Incorporated. These variants maintain all critical electrical specifications while providing automotive-grade qualification.

All substitute parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8541.10.0070).

Frequently Asked Questions (FAQ)

Q: Can BAS70-TP be used as a direct replacement for BAS70 RFG?

A: Yes. BAS70-TP meets all critical electrical parameters: 70 V reverse voltage, 70 mA average rectified current, 1 V forward voltage at 15 mA, and SOT-23-3 package. The reverse leakage current specification is 200 nA @ 50 V compared to 100 nA @ 50 V for the original part, which remains within acceptable limits for most applications. Both are supplied in Tape & Reel format.

Q: What is the difference between BAS70-7-F and BAS70-TP?

A: Both parts are electrically equivalent with identical voltage, current, and forward voltage ratings. The primary differences are: (1) Manufacturer: BAS70-7-F is Diodes Incorporated; BAS70-TP is Micro Commercial Co; (2) Packaging format: BAS70-7-F is supplied in Cut Tape & Digi-Reel®; BAS70-TP is Tape & Reel; (3) Inventory: BAS70-7-F has significantly higher availability (125,100 pcs vs. 24,150 pcs).

Q: Why do the Infineon parts (BAS70E6327HTSA1, BAS70E6433HTMA1) have faster reverse recovery time?

A: The Infineon variants specify 100 ps reverse recovery time compared to 5 ns for other substitutes. This represents superior switching performance and may reduce switching losses in high-frequency applications. All other electrical parameters remain identical, making these parts suitable for applications where faster switching is beneficial.

Q: Are automotive-grade variants (BAS70HE3-TP, BAS70Q-7-F) required for all applications?

A: Automotive-grade variants carry AEC-Q101 qualification and are required only for automotive and safety-critical applications. For standard industrial and consumer applications, standard-grade substitutes are appropriate. Automotive variants maintain identical electrical specifications to standard grades.

Q: Can I substitute BAS70 RFG with BAS70Q-7-F in a non-automotive application?

A: Yes. BAS70Q-7-F meets all electrical and mechanical requirements for the BAS70 RFG. The AEC-Q101 automotive qualification does not restrict use in non-automotive applications; it indicates enhanced reliability screening. This part is suitable for any application requiring 70 V / 70 mA Schottky diode functionality in SOT-23 package.

Q: What is the significance of the SOT-23-3 package designation?

A: SOT-23-3 is the three-terminal surface mount package variant used for all listed substitutes. This package is mechanically and electrically compatible with the original BAS70 RFG TO-236-3 / SC-59 designation. All parts are suitable for automated assembly on standard pick-and-place equipment.

Q: Are there any compliance or regulatory differences between substitute parts?

A: All substitute parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts. No regulatory or compliance barriers exist for substitution across the listed parts.

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