2SC5171 Equivalent & Substitute Parts

Part Overview

The 2SC5171 is an NPN bipolar junction transistor manufactured by Toshiba Semiconductor and Storage, designed for through-hole applications in the TO-220NIS package. This component operates at a maximum collector current of 2 A with a collector-emitter breakdown voltage of 180 V, making it suitable for medium-power switching and amplification circuits. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements.

Substiute Parts

2SC5171,MATUDQ(J

Toshiba Semiconductor and StorageIn Stock: 8512SC5171,MATUDQ(J Datasheet

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2SC4883A

Sanken Electric USA Inc.In Stock: 37532SC4883A Datasheet

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2SC4381

Sanken Electric USA Inc.In Stock: 19462SC4381 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC5171 is determined by strict alignment of electrical and mechanical parameters within the NPN bipolar transistor category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Transistor polarity: NPN type
• Maximum collector current: 2 A minimum
• Collector-emitter breakdown voltage: 180 V minimum
• Mounting configuration: Through-hole TO-220 package family
• Operating temperature range: 150°C maximum junction temperature
• Saturation voltage characteristics: 1 V maximum at specified base and collector currents

The 2SC4883A meets all critical electrical parameters with identical maximum ratings for collector current (2 A) and collector-emitter breakdown voltage (180 V). Both devices operate at 150°C maximum junction temperature and utilize compatible TO-220 package configurations (TO-220F versus TO-220NIS).

The 2SC4381 provides substitution capability with a reduced collector-emitter breakdown voltage of 150 V, which represents a 30 V reduction from the 2SC5171 specification. This device maintains the 2 A collector current rating and 150°C operating temperature, with TO-220F packaging compatibility.

Parameter Comparison

Engineering Selection Recommendations

2SC4883A Selection Criteria:

The 2SC4883A provides direct electrical equivalence to the 2SC5171 with matching collector current (2 A) and collector-emitter breakdown voltage (180 V) specifications. This substitute maintains full voltage rating compatibility for applications requiring 180 V operation. The device carries RoHS Compliant certification, supporting environmental compliance requirements. Although classified as obsolete, the 2SC4883A offers 3694 units in current inventory stock, providing immediate availability for production needs.

2SC4381 Selection Criteria:

The 2SC4381 functions as a substitute for applications where the 180 V collector-emitter breakdown voltage is not a critical design constraint. This device maintains the 2 A collector current rating and operates within the same 150°C junction temperature range. The 2SC4381 holds Active product status with ROHS3 Compliant certification, indicating current manufacturing support and enhanced environmental compliance. With 1900 units in inventory stock, this component provides long-term availability for ongoing production requirements. The reduced voltage rating (150 V versus 180 V) requires circuit-level verification to confirm compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 2SC4883A directly replace the 2SC5171 in existing circuit designs?

A: The 2SC4883A provides electrical equivalence for the critical parameters of collector current (2 A) and collector-emitter breakdown voltage (180 V). Both devices operate at 150°C maximum junction temperature and utilize compatible TO-220 package configurations. The primary difference is the transition frequency (120 MHz for 2SC4883A versus 200 MHz for 2SC5171), which affects high-frequency performance characteristics. Circuit-level evaluation is necessary to confirm compatibility with specific application requirements.

Q: What is the voltage rating difference between the 2SC5171 and 2SC4381?

A: The 2SC5171 has a maximum collector-emitter breakdown voltage of 180 V, while the 2SC4381 is rated at 150 V. This 30 V difference represents a reduction in maximum voltage capability. Applications operating at voltages between 150 V and 180 V require the higher-rated device. For circuits operating below 150 V, the 2SC4381 provides equivalent performance.

Q: Are the TO-220NIS and TO-220F packages mechanically compatible?

A: Both packages are members of the TO-220-3 family and share the same three-lead through-hole configuration with identical pin spacing and mounting hole dimensions. The designations NIS and F represent different thermal and mechanical variants within the TO-220 standard. Physical mounting compatibility is maintained across these variants.

Q: What is the product status significance for component selection?

A: The 2SC5171 and 2SC4883A are classified as obsolete, indicating discontinued manufacturing. The 2SC4381 maintains Active status, confirming ongoing production and long-term availability. For new designs or extended production runs, the Active-status 2SC4381 provides supply chain continuity and manufacturer support.

Q: How do the RoHS compliance levels differ between substitute options?

A: The 2SC4883A carries RoHS Compliant certification, meeting the original Restriction of Hazardous Substances directive. The 2SC4381 carries ROHS3 Compliant certification, indicating compliance with the updated RoHS 3 directive (2015/863/EU). Both certifications satisfy environmental regulatory requirements, with ROHS3 representing the current regulatory standard.

Q: What inventory availability exists for each substitute part?

A: The 2SC5171 has 743 units in current stock. The 2SC4883A has 3694 units available, providing significantly higher inventory levels. The 2SC4381 has 1900 units in stock. Inventory quantities support immediate procurement for production requirements.