J202_D74Z JFET N-Channel Equivalent & Substitute Parts

Part Overview

The J202_D74Z is an N-Channel JFET transistor manufactured by onsemi, rated for 40 V breakdown voltage with a maximum power dissipation of 625 mW in a through-hole TO-92-3 package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The J202_D74Z serves applications requiring N-Channel JFET functionality within the specified voltage and current parameters.

Substiute Parts

J202_D74Z

onsemiIn Stock: 1151J202_D74Z Datasheet

Current PartRFQ

MMBFJ202

onsemiIn Stock: 80322MMBFJ202 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the J202_D74Z is determined by electrical parameter equivalence across the following criteria:

• FET Type: N-Channel configuration must be maintained
• Voltage - Breakdown (V(BR)GSS): 40 V rating must be matched or exceeded
• Current - Drain (Idss) @ Vds (Vgs=0): 900 µA @ 20 V specification must be matched
• Voltage - Cutoff (VGS off) @ Id: 800 mV @ 10 nA specification must be matched
• Operating Temperature Range: -55°C to 150°C (TJ) must be supported
• Moisture Sensitivity Level: MSL 1 (Unlimited) classification

The MMBFJ202 qualifies as an electrical equivalent based on identical electrical specifications. The primary difference is the package format: MMBFJ202 uses a surface-mount SOT-23-3 package instead of the through-hole TO-92-3 package of the J202_D74Z. This substitution is valid when the application design permits surface-mount component integration.

Parameter Comparison

Engineering Selection Recommendations

The MMBFJ202 is electrically equivalent to the J202_D74Z across all critical electrical parameters: breakdown voltage, drain current, cutoff voltage, and operating temperature range. Both parts are manufactured by onsemi and carry identical REACH and ECCN classifications.

Selection between these parts depends on application-specific constraints:

• Through-Hole Requirement: If the PCB design mandates through-hole component mounting, the J202_D74Z remains the appropriate choice. However, given its obsolete status, design migration to surface-mount technology using the MMBFJ202 is recommended for long-term supply chain stability.

• Power Dissipation: The J202_D74Z is rated for 625 mW maximum power dissipation, while the MMBFJ202 is rated for 350 mW. Applications requiring power dissipation above 350 mW must retain the J202_D74Z or identify alternative through-hole N-Channel JFET options.

• Product Status and Availability: The MMBFJ202 is classified as active with 80,300 units in stock, ensuring supply continuity. The J202_D74Z is obsolete with limited inventory (1,108 units), making it unsuitable for new production designs.

• Compliance: Both parts are REACH Unaffected and carry EAR99 ECCN classification. The MMBFJ202 is RoHS3 Compliant, providing additional environmental compliance assurance.

Frequently Asked Questions (FAQ)

Q: Can the MMBFJ202 directly replace the J202_D74Z in existing designs?

A: Electrical substitution is valid based on matched specifications for breakdown voltage, drain current, cutoff voltage, and operating temperature. However, package format differs: MMBFJ202 is surface-mount (SOT-23-3) while J202_D74Z is through-hole (TO-92-3). PCB layout and assembly process modifications are required.

Q: What is the significance of the power rating difference between these parts?

A: The J202_D74Z is rated for 625 mW maximum power dissipation, while the MMBFJ202 is rated for 350 mW. Applications dissipating power above 350 mW must use the J202_D74Z or identify alternative components. The smaller SOT-23-3 package of the MMBFJ202 inherently limits thermal dissipation capability compared to the larger TO-92-3 package.

Q: Why is the J202_D74Z classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. This classification necessitates identification of active alternatives for design continuity and supply chain reliability.

Q: Are there compliance differences between these parts?

A: Both parts share identical REACH and ECCN classifications. The MMBFJ202 carries RoHS3 Compliance certification, while the J202_D74Z does not specify RoHS status. For applications requiring RoHS compliance, the MMBFJ202 is the appropriate selection.

Q: What inventory considerations apply to these parts?

A: The MMBFJ202 has 80,300 units in stock (active status), ensuring supply availability. The J202_D74Z has 1,108 units in stock (obsolete status), representing limited remaining inventory. For new production designs, the MMBFJ202 is recommended to avoid supply constraints.