BAS29_S00Z Equivalent & Substitute Parts

Part Overview

The BAS29_S00Z is a general-purpose rectifier diode manufactured by onsemi, rated for 120 V DC reverse voltage and 200 mA average rectified current in a surface-mount SOT-23-3 package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design and procurement requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within defined parameter tolerances suitable for the same application categories.

Substiute Parts

BAS29_S00Z

onsemiIn Stock: 1191BAS29_S00Z Datasheet

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BAS29

onsemiIn Stock: 17448BAS29 Datasheet

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BAS19-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 797BAS19-E3-18 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS29_S00Z is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 120 V
• Current - Average Rectified (Io): Must equal or exceed 200 mA
• Package / Case: Must be TO-236-3, SC-59, or SOT-23-3 (identical footprint)
• Mounting Type: Must be Surface Mount
• Speed Classification: Small Signal ≤ 200 mA (Io), Any Speed

Secondary Compatibility Parameters:

• Reverse Recovery Time (trr): 50 ns or lower
• Current - Reverse Leakage @ Vr: 100 nA or lower
• Operating Temperature - Junction: 150°C or higher
• Capacitance @ Vr, F: 2 pF or lower

Parts meeting all primary criteria are classified as direct substitutes. Parts meeting primary criteria with variations in secondary parameters remain functionally compatible within the specified application envelope.

Parameter Comparison

Engineering Selection Recommendations

BAS29 (onsemi): This part is the direct equivalent to BAS29_S00Z. It maintains identical electrical specifications across all primary and secondary parameters. The BAS29 is classified as Active product status, ensuring ongoing availability and supply chain continuity. It is ROHS3 compliant and supplied in Tape & Reel packaging. This part is the preferred substitute for the obsolete BAS29_S00Z.

BAS19-E3-18 (Vishay General Semiconductor - Diodes Division): This part meets the primary substitution criteria for current rating (200 mA) and package type (SOT-23-3). However, the maximum DC reverse voltage is rated at 100 V, which is 20 V lower than the BAS29_S00Z specification of 120 V. The BAS19-E3-18 is suitable only for applications where the reverse voltage requirement does not exceed 100 V. This part is classified as Active product status and is ROHS3 compliant. The capacitance specification is 5 pF, which is higher than the 2 pF of the main part. Selection of this part requires confirmation that the application voltage envelope does not exceed 100 V DC reverse.

Frequently Asked Questions (FAQ)

Q: Can BAS29 directly replace BAS29_S00Z without circuit modification?

A: Yes. The BAS29 maintains identical electrical and mechanical specifications to the BAS29_S00Z across all rated parameters. No circuit modification is required. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. unspecified).

Q: What is the key limitation of BAS19-E3-18 as a substitute?

A: The BAS19-E3-18 has a maximum DC reverse voltage rating of 100 V, compared to 120 V for the BAS29_S00Z. This part is suitable only for applications where the reverse voltage does not exceed 100 V. If the circuit design requires 120 V reverse voltage capability, the BAS19-E3-18 is not an appropriate substitute.

Q: Are all substitute parts available in the same package?

A: Yes. Both BAS29 and BAS19-E3-18 are supplied in the TO-236-3 / SC-59 / SOT-23-3 surface-mount package, which is identical to the BAS29_S00Z. PCB footprint compatibility is maintained across all three parts.

Q: What compliance certifications apply to the substitute parts?

A: Both BAS29 and BAS19-E3-18 are ROHS3 compliant and REACH unaffected. Both carry ECCN classification EAR99 and HTSUS code 8541.10.0070. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: How do forward voltage characteristics compare?

A: The BAS29 specifies 1 V maximum forward voltage at 200 mA, which is lower than the BAS29_S00Z specification of 1.25 V at 400 mA. The BAS19-E3-18 specifies 1.25 V at 200 mA. Lower forward voltage in the BAS29 may result in reduced power dissipation in the application circuit.

Q: Are there temperature range differences between the parts?

A: The BAS29_S00Z and BAS29 specify a maximum junction temperature of 150°C. The BAS19-E3-18 specifies an operating range of -55°C to 150°C, providing extended low-temperature capability. All three parts are rated for the same maximum junction temperature.

Q: What is the difference in reverse leakage current specifications?

A: The BAS29_S00Z and BAS29 specify 100 nA reverse leakage at 90 V. The BAS19-E3-18 specifies 100 nA reverse leakage at 100 V. The leakage current magnitude is identical; the measurement voltage differs slightly due to manufacturer specification conventions.