2SC5171(LBS2MATQ,M Equivalent & Substitute Parts

Part Overview

The 2SC5171(LBS2MATQ,M is an NPN bipolar junction transistor manufactured by Toshiba Semiconductor and Storage, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 2 A, collector-emitter breakdown voltage of 180 V, and maximum power dissipation of 2 W in a through-hole TO-220NIS package. The product is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating available packaging options.

Substiute Parts

2SC5171(LBS2MATQ,M

Toshiba Semiconductor and StorageIn Stock: 8222SC5171(LBS2MATQ,M Datasheet

Current PartRFQ

2SC4883A

Sanken Electric USA Inc.In Stock: 37532SC4883A Datasheet

SimilarRFQ

2SC4381

Sanken Electric USA Inc.In Stock: 19462SC4381 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2SC5171(LBS2MATQ,M are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Transistor Type: NPN configuration
• Maximum Collector Current (Ic): 2 A minimum
• Collector-Emitter Breakdown Voltage (VCEO): 180 V minimum
• Mounting Type: Through Hole
• Package Family: TO-220 series

Secondary Compatibility Parameters:

• Vce Saturation characteristics
• Collector Cutoff Current (ICBO)
• DC Current Gain (hFE)
• Power dissipation capability
• Operating temperature range

The 2SC4883A and 2SC4381 are identified as substitute components. Both devices maintain the required 2 A collector current rating and through-hole mounting configuration. The 2SC4883A matches the 180 V breakdown voltage specification exactly, while the 2SC4381 operates at 150 V, representing a reduced voltage capability. Both substitute parts are available in TO-220F packaging, which is mechanically compatible with TO-220-3 applications.

Parameter Comparison

Engineering Selection Recommendations

2SC4883A Substitution: The 2SC4883A is the primary electrical equivalent for the 2SC5171(LBS2MATQ,M. This device matches the 180 V collector-emitter breakdown voltage specification and maintains the 2 A maximum collector current rating. The 2SC4883A is classified as obsolete but carries RoHS Compliant certification. The device provides superior power dissipation capability (20 W versus 2 W), enabling thermal margin in applications. The transition frequency of 120 MHz is lower than the original specification, requiring evaluation in high-frequency switching applications. This substitute is suitable for direct replacement in designs where the 180 V voltage rating is mandatory.

2SC4381 Substitution: The 2SC4381 is an alternative substitute with active product status, providing long-term availability assurance. This device maintains the 2 A collector current specification and through-hole TO-220 mounting configuration. The collector-emitter breakdown voltage is reduced to 150 V, limiting application to circuits operating below this threshold. The 2SC4381 carries ROHS3 Compliant certification, meeting current environmental standards. The transition frequency of 15 MHz is significantly lower than both the original part and the 2SC4883A, restricting use to low-frequency switching applications. The 25 W power rating provides substantial thermal capability. This substitute is appropriate for designs with voltage margins below 180 V and low-frequency operation requirements.

Selection Criteria:

• For applications requiring 180 V breakdown voltage: select 2SC4883A
• For applications with voltage margins and long-term availability requirements: select 2SC4381
• For high-frequency switching above 120 MHz: neither substitute is recommended without circuit redesign evaluation

Frequently Asked Questions (FAQ)

Q: Can the 2SC4883A directly replace the 2SC5171(LBS2MATQ,M in all applications?

A: The 2SC4883A provides electrical compatibility for applications operating at or below 180 V with collector currents to 2 A. The transition frequency is reduced from 200 MHz to 120 MHz. Applications operating above 120 MHz require frequency response evaluation. The TO-220F package is mechanically compatible with TO-220NIS mounting.

Q: What is the voltage limitation of the 2SC4381 substitute?

A: The 2SC4381 has a maximum collector-emitter breakdown voltage of 150 V, compared to 180 V for the original 2SC5171(LBS2MATQ,M. This device is suitable only for circuits with design margins below 150 V. Applications requiring the full 180 V rating must use the 2SC4883A.

Q: Are there RoHS compliance differences between the substitutes?

A: The 2SC4883A carries RoHS Compliant certification. The 2SC4381 carries ROHS3 Compliant certification, representing current environmental standards. Both substitutes meet RoHS requirements; the 2SC4381 meets the more recent ROHS3 specification.

Q: How do the power dissipation ratings affect substitution?

A: The original 2SC5171(LBS2MATQ,M is rated at 2 W maximum power dissipation. The 2SC4883A is rated at 20 W, and the 2SC4381 is rated at 25 W. Higher power ratings provide thermal margin but do not change electrical substitution compatibility. Thermal design must account for the specific application's power requirements.

Q: What are the DC current gain differences between these devices?

A: The 2SC5171(LBS2MATQ,M specifies a minimum hFE of 100 at 100 mA collector current and 5 V collector-emitter voltage. Both substitutes specify a minimum hFE of 60 at 700 mA collector current and 10 V collector-emitter voltage. These measurements are taken at different operating points; circuit designs must account for the specified gain at the intended operating conditions.

Q: Is the 2SC4381 recommended for new designs?

A: The 2SC4381 carries active product status, indicating ongoing manufacturer support and availability. However, the reduced voltage rating (150 V versus 180 V) and significantly lower transition frequency (15 MHz versus 200 MHz) limit its application scope. The 2SC4381 is suitable for low-frequency switching applications with voltage margins below 150 V.

Q: Can both substitutes be used interchangeably in the same circuit?

A: The 2SC4883A and 2SC4381 have different electrical characteristics and are not interchangeable without circuit evaluation. The 2SC4883A maintains the 180 V voltage rating and higher frequency capability. The 2SC4381 operates at reduced voltage and frequency. Selection depends on specific application requirements for voltage, frequency, and availability.