BAS321,135 Equivalent & Substitute Parts

Part Overview

The BAS321,135 is a general-purpose rectifier diode manufactured by Nexperia USA Inc., rated for 200 V DC reverse voltage and 250 mA average rectified current in a surface mount SOD-323 package. This fast recovery diode with 50 ns reverse recovery time is designed for applications requiring efficient switching and rectification at moderate voltage and current levels.

The BAS321,135 maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching or exceeding the electrical specifications and maintaining compatible packaging standards. Alternative sources and packaging formats are available to support supply chain flexibility and design requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	250	mA
Voltage - Forward (Vf) Maximum @ If	1.25 V @ 200 mA	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	100	nA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	—
Capacitance @ Vr, F	2	pF @ 0V, 1MHz
Operating Temperature - Junction Maximum	150	°C
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BAS321,135 are classified into three categories based on electrical parameter alignment and product status:

Parametric Equivalents (Nexperia): Parts BAS321,115 and BAS321Z match all critical electrical specifications including 200 V reverse voltage, 250 mA average rectified current, 1.25 V forward voltage at 200 mA, and 50 ns reverse recovery time. These parts differ only in packaging format (Cut Tape vs. Tape & Reel) and inventory availability. BAS321,115 is Active status with higher inventory. BAS321Z is Active status in Tape & Reel format.

Parametric Equivalent (Infineon): Part BAS2103WE6327HTSA1 matches all critical electrical specifications with identical voltage, current, and recovery time ratings. This part carries Last Time Buy status and uses a different supplier device package designation (PG-SOD323-3D) while maintaining SC-76 SOD-323 mechanical compatibility.

Parametric Equivalent (Vishay): Part BAV21WS-E3-08 matches all critical electrical specifications with 200 V reverse voltage and 250 mA average rectified current. Capacitance is specified at 1.5 pF versus 2 pF for the main part, representing a minor variation within acceptable tolerance.

Similar Parts (Reduced Current Rating): Parts BAS21HT1G (onsemi), BAS21AHT1G (onsemi), BAS21WS-TP (Micro Commercial Co), and BAV21WS-7-F (Diodes Incorporated) are rated for 200 mA average rectified current, which is lower than the 250 mA specification of the main part. These parts maintain 200 V reverse voltage and 50 ns reverse recovery time. Substitution is acceptable only when circuit design permits reduced current capacity.

Similar Part (Alternate Manufacturer): Part BAV21WS_R1_00001 (Panjit International Inc.) is rated for 200 mA average rectified current with 200 V reverse voltage. Forward voltage is specified at 1 V @ 100 mA rather than 1.25 V @ 200 mA. Package designation is SC-90 SOD-323F.

All substitute parts maintain SOD-323 surface mount package compatibility, ROHS3 compliance, and MSL 1 rating.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (mA)	Vf (Max) @ If	trr (ns)	Ir @ Vr (nA)	Speed	Packaging	Status
BAS321,135	Nexperia USA Inc.	200	250	1.25 V @ 200 mA	50	100 @ 200 V	Fast Recovery ≤ 500ns, > 200mA	Cut Tape (CT) & Digi-Reel®	Active
BAS321,115	Nexperia USA Inc.	200	250	1.25 V @ 200 mA	50	100 @ 200 V	Fast Recovery ≤ 500ns, > 200mA	Cut Tape (CT) & Digi-Reel®	Active
BAS321Z	Nexperia USA Inc.	200	250	1.25 V @ 200 mA	50	100 @ 200 V	Fast Recovery ≤ 500ns, > 200mA	Tape & Reel (TR)	Active
BAS2103WE6327HTSA1	Infineon Technologies	200	250	1.25 V @ 200 mA	50	100 @ 200 V	Fast Recovery ≤ 500ns, > 200mA	Cut Tape (CT)	Last Time Buy
BAV21WS-E3-08	Vishay General Semiconductor - Diodes Division	200	250	1.25 V @ 200 mA	50	100 @ 200 V	Fast Recovery ≤ 500ns, > 200mA	Cut Tape (CT) & Digi-Reel®	Active
BAS21HT1G	onsemi	250	200	1.25 V @ 200 mA	50	100 @ 200 V	Small Signal ≤ 200mA, Any Speed	Cut Tape (CT) & Digi-Reel®	Active
BAS21AHT1G	onsemi	200	200	1.25 V @ 200 mA	50	40 @ 200 V	Small Signal ≤ 200mA, Any Speed	Cut Tape (CT) & Digi-Reel®	Active
BAS21WS-TP	Micro Commercial Co	250	200	1.25 V @ 200 mA	50	100 @ 200 V	Small Signal ≤ 200mA, Any Speed	Tape & Reel (TR)	Active
BAV21WS-7-F	Diodes Incorporated	200	200	1.25 V @ 200 mA	50	100 @ 200 V	Small Signal ≤ 200mA, Any Speed	Cut Tape (CT) & Digi-Reel®	Active
BAV21WS_R1_00001	Panjit International Inc.	200	200	1 V @ 100 mA	50	100 @ 200 V	Small Signal ≤ 200mA, Any Speed	Tape & Reel (TR)	Active

Engineering Selection Recommendations

First Priority - Parametric Equivalents (Active Status):

BAS321,115 and BAS321Z are direct parametric equivalents to BAS321,135 with identical electrical specifications. Both maintain Active product status with full ROHS3 compliance and MSL 1 rating. BAS321,115 offers higher inventory availability (59,706 pcs) in Cut Tape format. BAS321Z provides Tape & Reel packaging with 30,871 pcs in stock. Selection between these parts depends on packaging and assembly process requirements.

BAV21WS-E3-08 (Vishay) is a parametric equivalent with identical voltage, current, and recovery time specifications. Active status and full compliance certifications support direct substitution. Capacitance specification of 1.5 pF versus 2 pF represents a minor variation acceptable for general-purpose rectification applications.

Second Priority - Parametric Equivalent (Last Time Buy Status):

BAS2103WE6327HTSA1 (Infineon) matches all critical electrical specifications but carries Last Time Buy status. This designation indicates the manufacturer will discontinue production. Substitution is acceptable for current designs, but long-term supply planning should prioritize Active status alternatives.

Third Priority - Similar Parts (Reduced Current Rating):

BAS21HT1G, BAS21AHT1G, BAS21WS-TP, and BAV21WS-7-F are rated for 200 mA average rectified current versus the 250 mA specification of BAS321,135. These parts maintain 200 V reverse voltage, 50 ns reverse recovery time, and full compliance certifications. Substitution is valid only when circuit design analysis confirms that 200 mA current capacity is sufficient for the application. All four parts maintain Active product status.

Fourth Priority - Similar Part (Alternate Specifications):

BAV21WS_R1_00001 (Panjit) is rated for 200 mA average rectified current with forward voltage specified at 1 V @ 100 mA rather than 1.25 V @ 200 mA. Package designation SC-90 SOD-323F differs from the standard SC-76 designation. Substitution requires verification of forward voltage performance at actual circuit operating conditions and mechanical compatibility confirmation.

Supply Chain Considerations:

All substitute parts maintain SOD-323 surface mount package compatibility and ROHS3 compliance. Inventory availability ranges from 4,711 pcs (BAS321/8F, Obsolete status) to 7,965,200 pcs (BAS21HT1G). Selection should prioritize Active status parts with adequate inventory for production requirements.

Frequently Asked Questions (FAQ)

Q: Can BAS321,115 be used as a direct replacement for BAS321,135?

A: Yes. BAS321,115 is a parametric equivalent with identical electrical specifications: 200 V reverse voltage, 250 mA average rectified current, 1.25 V forward voltage at 200 mA, and 50 ns reverse recovery time. Both parts are manufactured by Nexperia USA Inc., maintain Active product status, and carry ROHS3 compliance. The primary difference is packaging format: BAS321,115 is supplied in Cut Tape & Digi-Reel format, while BAS321,135 uses the same packaging. Substitution is direct with no circuit modifications required.

Q: What is the difference between BAS321Z and BAS321,135?

A: BAS321Z and BAS321,135 are parametric equivalents with identical electrical specifications. The difference is packaging format: BAS321Z is supplied in Tape & Reel (TR) format, while BAS321,135 is supplied in Cut Tape (CT) & Digi-Reel format. Both parts are manufactured by Nexperia USA Inc. and maintain Active product status. Selection depends on assembly process requirements and equipment compatibility.

Q: Can BAS21HT1G replace BAS321,135 in my circuit?

A: BAS21HT1G is a similar part with important differences. It is rated for 250 V reverse voltage (higher than the 200 V specification) and 200 mA average rectified current (lower than the 250 mA specification). Substitution is acceptable only if circuit analysis confirms that 200 mA current capacity is sufficient for the application. The higher voltage rating provides additional margin. BAS21HT1G is manufactured by onsemi and maintains Active product status.

Q: What does "Last Time Buy" status mean for BAS2103WE6327HTSA1?

A: Last Time Buy status indicates that Infineon Technologies has announced discontinuation of this part. The manufacturer will accept orders for a limited time before production ends. BAS2103WE6327HTSA1 is a parametric equivalent to BAS321,135 with identical electrical specifications and full compliance certifications. Substitution is acceptable for current designs, but long-term supply planning should prioritize Active status alternatives such as BAS321,115 or BAS321Z.

Q: Why do some substitute parts have lower current ratings (200 mA vs. 250 mA)?

A: Parts such as BAS21AHT1G, BAV21WS-7-F, and BAV21WS-TP are rated for 200 mA average rectified current, which is lower than the 250 mA specification of BAS321,135. These parts are classified as similar rather than equivalent. Substitution is valid only when circuit design analysis confirms that the reduced current capacity meets application requirements. The lower current rating does not affect voltage or recovery time specifications.

Q: Are all substitute parts compatible with SOD-323 package footprints?

A: All listed substitute parts use SOD-323 surface mount package designation and are mechanically compatible with standard SOD-323 footprints. One exception is BAV21WS_R1_00001, which specifies package designation SC-90 SOD-323F. While this part maintains SOD-323 compatibility, mechanical verification is recommended before substitution in existing designs.

Q: What is the significance of reverse recovery time (trr) in diode selection?

A: Reverse recovery time (trr) is the time required for a diode to switch from forward conduction to reverse blocking state. All listed substitute parts maintain 50 ns reverse recovery time, matching the BAS321,135 specification. This parameter is critical for switching applications and power supply designs. Faster recovery times reduce switching losses and electromagnetic interference.

Q: Can I substitute BAV21WS-E3-08 for BAS321,135?

A: Yes. BAV21WS-E3-08 is a parametric equivalent manufactured by Vishay General Semiconductor - Diodes Division. It matches all critical electrical specifications: 200 V reverse voltage, 250 mA average rectified current, 1.25 V forward voltage at 200 mA, and 50 ns reverse recovery time. Capacitance is specified at 1.5 pF versus 2 pF for BAS321,135, representing a minor variation. BAV21WS-E3-08 maintains Active product status and full ROHS3 compliance.

Q: What compliance certifications do all substitute parts maintain?

A: All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. REACH status is listed as REACH Unaffected for all parts. ECCN classification is EAR99 for all parts. These certifications ensure compatibility with environmental regulations and supply chain requirements across global markets.

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