BC846T,115 Equivalent & Substitute Parts Reference

Part Overview

The BC846T,115 is an NPN bipolar junction transistor manufactured by NXP USA Inc., designed for small-signal switching and amplification applications. It features a 65 V collector-emitter breakdown voltage, 100 mA maximum collector current, and 100 MHz transition frequency in a surface mount SC-75 package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

BC846T,115

NXP USA Inc.In Stock: 1156BC846T,115 Datasheet

Current PartRFQ

BC846,215

NXP USA Inc.In Stock: 2376214BC846,215 Datasheet

MFR RecommendedRFQ

BC846ALT1G

onsemiIn Stock: 1529299BC846ALT1G Datasheet

MFR RecommendedRFQ

BC846BMB,315

Nexperia USA Inc.In Stock: 21196BC846BMB,315 Datasheet

MFR RecommendedRFQ

BC846BWT1G

onsemiIn Stock: 53222BC846BWT1G Datasheet

MFR RecommendedRFQ

BC846W,115

Nexperia USA Inc.In Stock: 39834BC846W,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BC846T,115 is determined by strict electrical and mechanical parameter matching within the BC846 family. All substitute parts maintain the following core electrical specifications:

Critical Matching Parameters:

• Transistor Type: NPN
• Voltage - Collector Emitter Breakdown (Max): 65 V
• Current - Collector (Ic) (Max): 100 mA
• Current - Collector Cutoff (Max): 15 nA (ICBO)
• DC Current Gain (hFE) (Min): 110 @ 2mA, 5V
• Frequency - Transition: 100 MHz
• RoHS3 Compliance
• MSL Level 1

Substitute parts are grouped by package type and power rating. The BC846T,115 operates in SC-75 packaging with 150 mW maximum power dissipation. Equivalent alternatives are available in SOT-23, SOT-323, and DFN1006B-3 packages, each with varying power ratings and saturation voltage characteristics. All substitutes maintain active product status and full compliance with environmental regulations.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BC846,215

The BC846,215 manufactured by NXP USA Inc. is the direct electrical equivalent with active product status. It maintains identical electrical specifications including 65 V breakdown voltage, 100 mA collector current, 110 hFE minimum gain, and 100 MHz transition frequency. The primary difference is packaging: BC846,215 uses SOT-23 (TO-236-3) instead of SC-75, with increased power rating of 250 mW. This part is recommended for new designs and high-volume production due to superior availability (2,376,160 units in stock) and established supply chain.

Alternative Substitute: BC846ALT1G

The BC846ALT1G from onsemi provides equivalent electrical performance with extended operating temperature range (-55°C to 150°C) compared to the BC846T,115 (0°C to 150°C implied). It features SOT-23-3 packaging and 300 mW power rating. Higher Vce saturation (600 mV) may affect switching speed in saturation-mode applications. Suitable for applications requiring wider temperature operation.

Compact Package Alternative: BC846BWT1G

The BC846BWT1G from onsemi offers the smallest footprint in SC-70-3 (SOT323) packaging, matching the 150 mW power rating of the original BC846T,115. Extended temperature range (-55°C to 150°C) and higher hFE (200 minimum) are provided. Vce saturation of 600 mV differs from the original 400 mV specification.

Automotive-Grade Alternative: BC846BMB,315

The BC846BMB,315 from Nexperia USA Inc. is qualified to AEC-Q101 automotive standard in DFN1006B-3 packaging. It features superior Vce saturation (200 mV @ 500µA, 10mA) and higher hFE (200 minimum). Recommended for automotive and high-reliability applications requiring formal qualification documentation.

Compact SOT-323 Alternative: BC846W,115

The BC846W,115 from Nexperia USA Inc. maintains identical electrical specifications to the BC846T,115 with SOT-323 packaging and 200 mW power rating. Vce saturation and hFE match the original part exactly. Suitable for space-constrained applications requiring minimal footprint change.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Selection should be based on specific package requirements, thermal dissipation needs, and supply chain availability for the target application.

Frequently Asked Questions (FAQ)

Q: Can BC846,215 replace BC846T,115 in existing designs?

A: Yes. The BC846,215 maintains all critical electrical specifications: 65 V breakdown voltage, 100 mA collector current, 110 hFE minimum, and 100 MHz transition frequency. The primary difference is packaging (SOT-23 vs. SC-75) and increased power rating (250 mW vs. 150 mW). PCB layout modification is required to accommodate the different package footprint.

Q: What is the difference between BC846ALT1G and BC846BWT1G?

A: Both are onsemi products with extended temperature range (-55°C to 150°C). BC846ALT1G uses SOT-23-3 packaging with 300 mW power rating, while BC846BWT1G uses SC-70-3 (SOT323) packaging with 150 mW power rating. BC846BWT1G provides a smaller footprint closer to the original SC-75 package size. Both feature 200 hFE minimum and 600 mV Vce saturation.

Q: Is BC846BMB,315 suitable for non-automotive applications?

A: Yes. BC846BMB,315 is a general-purpose NPN transistor with AEC-Q101 automotive qualification. The automotive qualification does not restrict its use in non-automotive applications. It offers superior Vce saturation (200 mV) and higher hFE (200 minimum), making it suitable for any application requiring these electrical characteristics.

Q: What are the package compatibility considerations?

A: The BC846T,115 uses SC-75 (SOT-416) packaging. Substitutes are available in three alternative packages: SOT-23 (BC846,215), SOT-323 (BC846W,115 and BC846BWT1G), and DFN1006B-3 (BC846BMB,315). Each package has different land pattern dimensions and pin configurations. PCB redesign is required when changing packages. Consult package datasheets for specific footprint dimensions.

Q: Why does BC846ALT1G have higher Vce saturation (600 mV) than the original (400 mV)?

A: Vce saturation varies between manufacturers and process technologies. The BC846ALT1G from onsemi uses a different silicon process than the NXP BC846T,115, resulting in higher saturation voltage. For applications where saturation voltage is critical (low-voltage switching, precision current sources), verify that 600 mV saturation is acceptable. For general switching applications, this difference is typically not significant.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts (BC846,215; BC846ALT1G; BC846BMB,315; BC846BWT1G; BC846W,115) are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original BC846T,115.

Q: Which substitute has the best availability?

A: BC846,215 has the highest inventory level at 2,376,160 units in stock, followed by BC846ALT1G with 1,529,200 units. Both are suitable for high-volume production with established supply chains.

Q: Can I use BC846BMB,315 in place of BC846T,115 without circuit modification?

A: Electrical substitution is possible due to matching core specifications. However, the DFN1006B-3 package is significantly smaller than SC-75, requiring PCB layout redesign. Additionally, the lower Vce saturation (200 mV) and higher hFE (200) may affect circuit behavior in saturation-mode applications. Circuit simulation or prototype testing is recommended for critical applications.