BAS21E6327HTSA1 Equivalent & Substitute Parts

Part Overview

The BAS21E6327HTSA1 is a general-purpose rectifier diode manufactured by Infineon Technologies, rated for 200 V DC reverse voltage and 250 mA average rectified current in a surface mount SOT-23-3 package. This device is classified as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	250	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 200 mA	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	100 nA @ 200 V	nA
Capacitance @ Vr, F	5 @ 0V, 1MHz	pF
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the BAS21E6327HTSA1 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed 250 mA
Package / Case: Must be TO-236-3, SC-59, or SOT-23-3
Mounting Type: Must be Surface Mount
Forward Voltage (Vf): Must not exceed 1.25 V @ 200 mA
Reverse Recovery Time (trr): Must not exceed 50 ns
RoHS Status: Must be ROHS3 Compliant
Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Substitution Groups:

Group 1: Direct Electrical Equivalents (200 V, 250 mA capability) Parts meeting all primary criteria with identical or superior electrical ratings and fast recovery characteristics.

Group 2: Functional Equivalents (200 V, 200 mA capability) Parts with reduced current rating (200 mA vs. 250 mA) but identical voltage rating and compatible electrical characteristics. These are suitable for applications where the circuit current demand does not exceed 200 mA.

Group 3: Enhanced Voltage Rating (250 V, 200 mA capability) Parts with increased voltage rating (250 V vs. 200 V) and reduced current rating (200 mA vs. 250 mA). These provide additional voltage margin and are suitable for applications where circuit current demand does not exceed 200 mA.

Group 4: Partial Compatibility (80 V, 250 mA capability) The MMBD4448HW-7-F offers identical current rating and package but significantly reduced voltage rating (80 V vs. 200 V). This part is suitable only for applications with voltage requirements not exceeding 80 V.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ If [V]	Speed	trr [ns]	Package	Status	Packaging Type
BAS21E6327HTSA1	Infineon Technologies	200	250	1.25 @ 200 mA	Fast Recovery ≤ 500ns, > 200mA	50	SOT-23-3	Last Time Buy	Cut Tape (CT)
SBAS21LT1G	onsemi	250	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Tape & Reel (TR)
BAS21,215	Nexperia USA Inc.	200	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Cut Tape (CT) & Digi-Reel®
BAS21,235	Nexperia USA Inc.	200	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Tape & Reel (TR)
BAS21-7-F	Diodes Incorporated	200	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Cut Tape (CT) & Digi-Reel®
BAS21-TP	Micro Commercial Co	200	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Tape & Reel (TR)
BAS21LT1G	onsemi	250	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Cut Tape (CT) & Digi-Reel®
BAS21LT3G	onsemi	250	200	1.25 @ 200 mA	Small Signal ≤ 200mA	50	SOT-23-3	Active	Tape & Reel (TR)
MMBD4448HW-7-F	Diodes Incorporated	80	250	1.25 @ 150 mA	Fast Recovery ≤ 500ns, > 200mA	4	SOT-23-3	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

No substitute part provides identical electrical performance across all parameters. The BAS21E6327HTSA1 combines 200 V reverse voltage with 250 mA current rating and fast recovery characteristics. All listed substitutes either reduce current rating to 200 mA or reduce voltage rating to 80 V.

For Applications with 200 mA Current Requirement:

The following parts are suitable substitutes when circuit current demand does not exceed 200 mA:

BAS21,215 (Nexperia USA Inc., Active status, Automotive Grade AEC-Q101 qualified)
BAS21,235 (Nexperia USA Inc., Active status)
BAS21-7-F (Diodes Incorporated, Active status)
BAS21-TP (Micro Commercial Co, Active status)
BAS21LT1G (onsemi, Active status, 250 V rating)
BAS21LT3G (onsemi, Active status, 250 V rating)
SBAS21LT1G (onsemi, Active status, 250 V rating)

All listed substitutes maintain ROHS3 compliance, MSL 1 rating, and identical package specifications (SOT-23-3).

For Applications with 80 V Maximum Voltage Requirement:

MMBD4448HW-7-F (Diodes Incorporated, Active status) maintains the 250 mA current rating and fast recovery characteristics but is limited to 80 V reverse voltage.

Product Status Consideration:

All substitute parts listed carry Active product status, ensuring ongoing availability and manufacturing support. The original BAS21E6327HTSA1 is Last Time Buy, making substitution necessary for future production.

Frequently Asked Questions (FAQ)

Q1: Can BAS21,215 or BAS21,235 directly replace BAS21E6327HTSA1 in all applications?

A: These parts are suitable substitutes only when the circuit current requirement does not exceed 200 mA. Both parts maintain the 200 V reverse voltage rating, identical forward voltage characteristics, and SOT-23-3 package. If the application requires 250 mA current capability, these parts are not suitable.

Q2: What is the difference between BAS21LT1G and SBAS21LT1G?

A: Both parts are manufactured by onsemi with identical electrical specifications: 250 V reverse voltage, 200 mA current rating, and SOT-23-3 package. The primary difference is packaging: BAS21LT1G is supplied in Cut Tape (CT) & Digi-Reel® format, while SBAS21LT1G is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements.

Q3: Why does MMBD4448HW-7-F appear in the substitute list if it has only 80 V rating?

A: MMBD4448HW-7-F is listed as a substitute for applications where the maximum circuit voltage does not exceed 80 V. This part maintains the 250 mA current rating and fast recovery characteristics of the original part. It is not suitable for applications requiring 200 V reverse voltage capability.

Q4: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this document are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original BAS21E6327HTSA1 specifications.

Q5: What is the significance of "Fast Recovery" versus "Small Signal" speed classification?

A: The original BAS21E6327HTSA1 is classified as Fast Recovery (≤ 500ns, > 200mA) with 50 ns reverse recovery time. Most substitute parts are classified as Small Signal (≤ 200mA, Any Speed) with identical 50 ns reverse recovery time. Both classifications meet the same reverse recovery time specification. The speed classification reflects the diode's intended application category rather than a performance difference.

Q6: Can BAS21-7-F be used in automotive applications?

A: BAS21-7-F is manufactured by Diodes Incorporated and carries Active product status. However, only BAS21,215 from Nexperia USA Inc. explicitly carries Automotive Grade designation with AEC-Q101 qualification. For automotive applications, BAS21,215 is the recommended substitute.

Q7: What packaging options are available for substitute parts?

A: Substitute parts are available in two packaging formats: Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR). Selection depends on assembly equipment compatibility. Cut Tape format is suitable for manual or semi-automated assembly, while Tape & Reel format is optimized for automated pick-and-place equipment.

Q8: Is the 250 V rating of BAS21LT1G and BAS21LT3G an advantage over the 200 V original part?

A: The 250 V rating provides additional voltage margin and is suitable for applications where the circuit voltage does not exceed 250 V. However, these parts have reduced current rating (200 mA vs. 250 mA). Selection depends on whether the application is current-limited or voltage-limited.

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