BAS70FILM Equivalent & Substitute Parts

Part Overview

The BAS70FILM is a Schottky diode manufactured by STMicroelectronics, rated for 70 V DC reverse voltage and 70 mA average rectified current in a surface mount SOT-23-3 package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
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
Mounting Type	Surface Mount
Current - Reverse Leakage @ Vr	10 µA @ 70 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz
Operating Temperature - Junction	150°C (Max)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAS70FILM is determined by the following critical electrical and mechanical parameters:

Electrical 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
Capacitance @ Vr, F: 2 pF @ 0 V, 1 MHz

Mechanical Parameters:

Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

Compliance Parameters:

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

Substitute parts must match all critical electrical parameters and maintain the same physical package footprint. Parts with identical base product numbers (BAS70) or equivalent Schottky diode arrays with matching voltage and current ratings are classified as direct substitutes. Parts with different manufacturers but identical specifications are classified as equivalent alternatives.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	Reverse Leakage @ Vr	Capacitance @ Vr
BAS70FILM	STMicroelectronics	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Obsolete	10 µA @ 70 V	2 pF @ 0 V, 1 MHz
BAR18FILM	STMicroelectronics	70 V	70 mA	410 mV @ 1 mA	SOT-23-3	Active	200 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70Q-7-F	Diodes Incorporated	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70-7-F	Diodes Incorporated	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70-TP	Micro Commercial Co	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	200 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70E6327HTSA1	Infineon Technologies	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70E6433HTMA1	Infineon Technologies	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	2 pF @ 0 V, 1 MHz
BAS70LT1G	onsemi	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	10 µA @ 70 V	2 pF @ 0 V, 1 MHz
CDBT-70C-G	Comchip Technology	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	Not specified
CDBT-70S-G	Comchip Technology	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	100 nA @ 50 V	Not specified
NSVBAS70LT1G	onsemi	70 V	70 mA	1 V @ 15 mA	SOT-23-3	Active	10 µA @ 70 V	2 pF @ 0 V, 1 MHz

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Mechanical Specifications):

The following parts are direct substitutes for BAS70FILM with active product status and full compliance:

BAS70-7-F (Diodes Incorporated): Active status, matches all electrical parameters, SOT-23-3 package, ROHS3 compliant
BAS70Q-7-F (Diodes Incorporated): Active status, automotive grade with AEC-Q101 qualification, matches all electrical parameters, SOT-23-3 package
BAS70E6327HTSA1 (Infineon Technologies): Active status, matches all electrical parameters, SOT-23-3 package, ROHS3 compliant
BAS70E6433HTMA1 (Infineon Technologies): Active status, matches all electrical parameters, SOT-23-3 package, ROHS3 compliant
BAS70LT1G (onsemi): Active status, matches all electrical parameters including reverse leakage specification, SOT-23-3 package, ROHS3 compliant
NSVBAS70LT1G (onsemi): Active status, matches all electrical parameters including reverse leakage specification, SOT-23-3 package, ROHS3 compliant

Alternative Substitutes (Equivalent Electrical Performance):

BAS70-TP (Micro Commercial Co): Active status, matches all critical electrical parameters, SOT-23-3 package, ROHS3 compliant
BAR18FILM (STMicroelectronics): Active status, same manufacturer as original part, SOT-23-3 package, improved reverse leakage performance

Diode Array Alternatives (Different Configuration):

CDBT-70C-G (Comchip Technology): Diode array with 1 pair common cathode configuration, active status, SOT-23-3 package
CDBT-70S-G (Comchip Technology): Diode array with 1 pair series connection configuration, active status, SOT-23-3 package

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating. Selection should prioritize parts with active product status to ensure long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can BAR18FILM be used as a direct replacement for BAS70FILM?

A: BAR18FILM is electrically compatible with BAS70FILM in terms of voltage and current ratings. Both are 70 V, 70 mA Schottky diodes in SOT-23-3 packages. However, BAR18FILM has a lower forward voltage specification (410 mV @ 1 mA) and significantly lower reverse leakage (200 nA @ 50 V) compared to BAS70FILM (1 V @ 15 mA, 10 µA @ 70 V). BAR18FILM is suitable for applications where lower forward voltage drop is beneficial.

Q: What is the difference between BAS70-7-F and BAS70Q-7-F?

A: Both parts are manufactured by Diodes Incorporated and have identical electrical specifications. BAS70Q-7-F carries automotive grade qualification (AEC-Q101) and is suitable for automotive applications. BAS70-7-F is the standard industrial version. Both are direct substitutes for BAS70FILM.

Q: Are CDBT-70C-G and CDBT-70S-G suitable replacements for BAS70FILM?

A: CDBT-70C-G and CDBT-70S-G are diode arrays with different internal configurations (common cathode and series connection, respectively) compared to the single diode BAS70FILM. While they match the electrical ratings and package, their different configurations make them suitable only for applications where the array configuration is compatible with the circuit design.

Q: Why do some substitute parts have different reverse leakage specifications?

A: Reverse leakage current varies by manufacturer and manufacturing process. BAS70FILM specifies 10 µA @ 70 V, while most alternatives specify 100 nA to 200 nA @ 50 V. Lower reverse leakage is generally advantageous for circuit performance. Parts with lower reverse leakage (such as BAS70-7-F, BAS70Q-7-F, and Infineon variants) provide improved performance characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of BAS70FILM.

Q: What is the significance of the reverse recovery time (trr) specification?

A: Reverse recovery time is provided for some substitute parts (BAS70-7-F: 5 ns, BAS70E6327HTSA1: 100 ps, BAS70E6433HTMA1: 100 ps, CDBT-70C-G: 2 ns, CDBT-70S-G: 2 ns) but not specified for BAS70FILM. This parameter indicates how quickly the diode transitions from conducting to blocking state. Faster recovery times (lower trr values) reduce switching losses in high-frequency applications.

Q: Can I use onsemi BAS70LT1G or NSVBAS70LT1G interchangeably?

A: Yes, BAS70LT1G and NSVBAS70LT1G are both manufactured by onsemi with identical electrical specifications and package configurations. Both match BAS70FILM specifications and are direct substitutes. NSVBAS70LT1G has higher inventory availability (41,100 pcs vs. 8,267 pcs).

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), and standard packaging. Selection should be based on production volume and assembly requirements. High-volume production typically uses Tape & Reel format, while lower volumes may use Cut Tape format.

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