BAS20-7 Equivalent & Substitute Parts

Part Overview

The BAS20-7 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 150 V DC reverse voltage and 200 mA average rectified current in a surface-mount SOT-23-3 package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

The BAS20-7 serves applications requiring small-signal rectification, switching, and signal detection in consumer and industrial electronics. Its compact surface-mount form factor and standard electrical characteristics make it suitable for high-volume production environments.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 200 mA	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	100 nA @ 150 V	nA
Capacitance @ Vr, F	5 @ 0V, 1MHz	pF
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction	-65 to 150	°C
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitute parts for the BAS20-7 are classified based on electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 150 V minimum
Current - Average Rectified (Io): 200 mA minimum
Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA maximum
Reverse Recovery Time (trr): 50 ns maximum
Current - Reverse Leakage @ Vr: 100 nA @ 150 V maximum
Capacitance @ Vr, F: 5 pF @ 0V, 1MHz maximum
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3 compatible
Operating Temperature - Junction: -55°C to 150°C minimum range

Substitution Categories:

Direct Manufacturer Equivalents: Parts with identical electrical specifications and packaging from the original manufacturer (Diodes Incorporated).

Parametric Equivalents: Parts from alternative manufacturers meeting or exceeding all electrical parameters with compatible packaging.

Automotive-Qualified Alternatives: Parts meeting AEC-Q101 qualification for applications requiring automotive-grade reliability.

Higher-Rated Alternatives: Parts with voltage or current ratings exceeding the BAS20-7 specification, suitable for designs with margin requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [nA]	Package	Product Status	RoHS Status
BAS20-7	Diodes Incorporated	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23-3	Discontinued	Non-compliant
BAS20-7-F	Diodes Incorporated	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23F	Active	ROHS3 Compliant
BAS20Q-13-F	Diodes Incorporated	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23-3	Active	ROHS3 Compliant
BAS20,215	Nexperia USA Inc.	150	200	1.25 @ 200 mA	50	100 @ 150 V	TO-236AB	Active	ROHS3 Compliant
BAS20,235	Nexperia USA Inc.	150	200	1.25 @ 200 mA	50	100 @ 150 V	TO-236AB	Active	ROHS3 Compliant
BAS20LT1G	onsemi	200	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23-3	Active	ROHS3 Compliant
BAS20LT3G	onsemi	200	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23-3	Active	ROHS3 Compliant
BAS21E6327HTSA1	Infineon Technologies	200	250	1.25 @ 200 mA	50	100 @ 200 V	SOT-23-3	Last Time Buy	ROHS3 Compliant
BAS20 RFG	Taiwan Semiconductor Corporation	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23	Active	ROHS3 Compliant
BAS20-TP	Micro Commercial Co	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23	Active	ROHS3 Compliant
BAS20HE3-TP	Micro Commercial Co	150	200	1.25 @ 200 mA	50	100 @ 150 V	SOT-23	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

BAS20-7-F (Diodes Incorporated) is the primary direct substitute. It maintains identical electrical specifications and is available in active production status with ROHS3 compliance. The SOT-23F package variant accommodates flat-lead configurations suitable for automated assembly processes.

BAS20Q-13-F (Diodes Incorporated) provides an automotive-qualified alternative with AEC-Q101 certification, maintaining the original SOT-23-3 package footprint. This option is appropriate for applications requiring automotive-grade reliability assurance.

For Cross-Manufacturer Substitution (Equivalent Specifications):

BAS20,215 and BAS20,235 (Nexperia USA Inc.) are functionally equivalent parts in TO-236AB packaging. Both are in active production with ROHS3 compliance. These parts are suitable for designs where manufacturer diversification is required for supply chain resilience.

BAS20 RFG (Taiwan Semiconductor Corporation) and BAS20-TP (Micro Commercial Co) maintain identical electrical specifications with active product status and ROHS3 compliance. These options support multi-source procurement strategies.

BAS20HE3-TP (Micro Commercial Co) includes automotive-grade qualification (AEC-Q101) with identical electrical specifications, suitable for automotive applications requiring qualified component documentation.

For Higher-Rated Applications:

BAS20LT1G and BAS20LT3G (onsemi) provide 200 V reverse voltage rating, exceeding the BAS20-7 specification by 50 V. These parts maintain identical forward voltage and current ratings with active production status and ROHS3 compliance. They are suitable for designs requiring additional voltage margin or applications with higher transient voltage exposure.

BAS21E6327HTSA1 (Infineon Technologies) offers 200 V reverse voltage and 250 mA current rating, providing margin in both parameters. This part is in Last Time Buy status and suitable for applications requiring enhanced current capacity.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing environmental and regulatory requirements. The original BAS20-7 is RoHS non-compliant; substitution with compliant alternatives is necessary for new designs and ongoing production in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can BAS20-7-F be used as a direct replacement for BAS20-7?

A: Yes. BAS20-7-F maintains identical electrical specifications (150 V, 200 mA, 1.25 V forward voltage, 50 ns recovery time) and is compatible with the same circuit design. The primary difference is packaging format (SOT-23F flat leads versus standard SOT-23-3), which affects assembly process compatibility but not electrical performance.

Q: What is the difference between BAS20Q-13-F and BAS20-7-F?

A: BAS20Q-13-F includes automotive-grade qualification (AEC-Q101) and is designated for automotive applications. Electrically, both parts are identical. Selection depends on application requirements and documentation needs for automotive supply chains.

Q: Are onsemi BAS20LT1G and BAS20LT3G suitable replacements?

A: Yes, with the consideration that these parts have a 200 V reverse voltage rating compared to the BAS20-7's 150 V rating. This higher rating provides additional voltage margin and makes them suitable for applications with transient voltage exposure. All other electrical parameters are identical. The primary difference is packaging format (Cut Tape versus Tape & Reel).

Q: Can I use BAS21E6327HTSA1 instead of BAS20-7?

A: Yes, with the understanding that BAS21E6327HTSA1 has higher current rating (250 mA versus 200 mA) and higher voltage rating (200 V versus 150 V). This part is electrically compatible and provides additional design margin. However, this part is in Last Time Buy status, limiting long-term availability.

Q: What is the difference between TO-236-3 and SOT-23-3 packages?

A: TO-236-3 and SOT-23-3 are equivalent designations for the same three-lead surface-mount package. Both refer to the same physical footprint and pin configuration. SOT-23F is a variant with flat leads instead of gull-wing leads, affecting assembly compatibility but maintaining electrical equivalence.

Q: Are Nexperia BAS20,215 and BAS20,235 interchangeable?

A: Yes. Both parts have identical electrical specifications and are in active production status with ROHS3 compliance. The part number suffix difference reflects internal Nexperia product line management but does not indicate functional differences.

Q: Why is the original BAS20-7 discontinued?

A: The BAS20-7 is discontinued at DiGi Electronics. Active alternatives from multiple manufacturers (Diodes Incorporated, onsemi, Nexperia, Micro Commercial Co, Taiwan Semiconductor Corporation, and Infineon) provide equivalent or superior specifications with ongoing production support and ROHS3 compliance.

Q: Which substitute offers the best long-term availability?

A: BAS20LT1G and BAS20LT3G (onsemi) have the highest inventory levels (125,200 and 137,370 units respectively) and active production status. BAS20-7-F (Diodes Incorporated) also has substantial inventory (17,200 units) and active status. Both options support long-term design continuity.

Q: Can I mix different manufacturers in the same production run?

A: Yes. All recommended substitutes maintain identical electrical specifications and package compatibility. Multi-source procurement using different manufacturers is a standard practice for supply chain resilience. Ensure that assembly process parameters (reflow temperature, lead finish compatibility) are validated for each manufacturer variant.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts with this qualification (BAS20Q-13-F, BAS20HE3-TP) have undergone additional reliability testing and documentation suitable for automotive supply chains. This qualification is required for automotive applications but optional for consumer and industrial applications.

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