BCR 166F E6327 Equivalent & Substitute Parts

Part Overview

The BCR 166F E6327 is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Infineon Technologies, designed for surface mount applications in the SOT-723 package. This component integrates internal base and emitter-base resistors (4.7 kΩ and 47 kΩ respectively) to simplify circuit design and reduce component count in switching and amplification applications.

The BCR 166F E6327 is classified as obsolete. Substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with equivalent electrical specifications and compatible packaging are available from multiple manufacturers.

Substiute Parts

BCR 166F E6327

Infineon TechnologiesIn Stock: 1154BCR 166F E6327 Datasheet

Current PartRFQ

DDTA143ZCA-7-F

Diodes IncorporatedIn Stock: 111343DDTA143ZCA-7-F Datasheet

MFR RecommendedRFQ

DTA143ZCA-TP

Micro Commercial CoIn Stock: 1081DTA143ZCA-TP Datasheet

MFR RecommendedRFQ

DTA143ZKAT146

Rohm SemiconductorIn Stock: 16479DTA143ZKAT146 Datasheet

MFR RecommendedRFQ

MMUN2133LT1G

onsemiIn Stock: 35463MMUN2133LT1G Datasheet

MFR RecommendedRFQ

NSVMMUN2133LT1G

onsemiIn Stock: 1650NSVMMUN2133LT1G Datasheet

MFR RecommendedRFQ

PDTA143ZT,215

Nexperia USA Inc.In Stock: 65538PDTA143ZT,215 Datasheet

MFR RecommendedRFQ

PDTA143ZT,235

Nexperia USA Inc.In Stock: 1121PDTA143ZT,235 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BCR 166F E6327 is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Transistor type: PNP - Pre-Biased configuration
• Maximum collector current: 100 mA
• Collector-emitter breakdown voltage: 50 V
• Internal base resistor (R1): 4.7 kΩ
• Internal emitter-base resistor (R2): 47 kΩ
• Mounting type: Surface Mount
• Moisture sensitivity level: 1 (Unlimited)

Package Compatibility: Substitute parts are grouped into two package categories:

1. SOT-23-3 / TO-236-3 package variants (DDTA143ZCA-7-F, DTA143ZCA-TP, DTA143ZKAT146, MMUN2133LT1G, NSVMMUN2133LT1G, PDTA143ZT,215, PDTA143ZT,235) — electrically equivalent with standard SOT-23-3 footprint compatibility
2. Original SOT-723 package — limited availability; SOT-23-3 alternatives require PCB layout evaluation for pin-to-pin compatibility

All substitute parts maintain the 50 V collector-emitter breakdown voltage, 100 mA maximum collector current, and integrated resistor network (4.7 kΩ / 47 kΩ) required for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PDTA143ZT,215 (Nexperia USA Inc.)

The PDTA143ZT,215 is the preferred substitute for the BCR 166F E6327. This part maintains full electrical equivalence with identical internal resistor values (4.7 kΩ / 47 kΩ), maximum collector current (100 mA), and collector-emitter breakdown voltage (50 V). The PDTA143ZT,215 is ROHS3 compliant, carries active product status, and demonstrates superior saturation characteristics (100 mV vs. 300 mV) with lower collector cutoff current (1 µA vs. 100 nA), providing enhanced performance margins. Inventory availability is substantial (65,523 units).

Secondary Recommendation: DDTA143ZCA-7-F (Diodes Incorporated)

The DDTA143ZCA-7-F provides full electrical substitution with active product status and ROHS3 compliance. This part maintains the required 4.7 kΩ / 47 kΩ resistor network and 50 V / 100 mA ratings. The transition frequency is elevated to 250 MHz, supporting higher-speed applications. Inventory availability is excellent (111,300 units).

Tertiary Recommendation: DTA143ZKAT146 (Rohm Semiconductor)

The DTA143ZKAT146 offers equivalent electrical specifications with active product status and ROHS3 compliance. This part is supplied in Cut Tape (CT) & Digi-Reel® packaging with strong inventory levels (16,440 units). The SMT3 package designation indicates compatibility with standard SOT-23-3 footprints.

Alternative Options: MMUN2133LT1G and NSVMMUN2133LT1G (onsemi)

Both onsemi parts (MMUN2133LT1G and NSVMMUN2133LT1G) provide electrical equivalence with active product status and ROHS3 compliance. The MMUN2133LT1G offers superior inventory availability (35,400 units) compared to the NSVMMUN2133LT1G variant (1,585 units). Both maintain the 4.7 kΩ / 47 kΩ resistor configuration and 50 V / 100 mA specifications.

Package Consideration:

All recommended substitutes employ SOT-23-3 / TO-236-3 packaging, which differs from the original SOT-723 package. PCB layout evaluation is required to confirm pin-to-pin compatibility and thermal performance in the target application. The SOT-23-3 package provides equivalent electrical performance with improved thermal characteristics and wider industry availability.

Compliance Status:

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. All parts maintain MSL 1 (Unlimited) moisture sensitivity classification, eliminating special handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the BCR 166F E6327 be directly replaced with any of the listed substitutes without circuit modification?

A: Yes, all listed substitute parts maintain electrical equivalence through identical internal resistor networks (4.7 kΩ base resistor, 47 kΩ emitter-base resistor), maximum collector current (100 mA), and collector-emitter breakdown voltage (50 V). However, PCB layout evaluation is required due to package differences between SOT-723 (original) and SOT-23-3 (substitutes).

Q: What is the primary difference between the BCR 166F E6327 and its substitutes?

A: The BCR 166F E6327 is obsolete with limited availability. All substitute parts are active products with current manufacturing support. Substitute parts employ SOT-23-3 packaging instead of SOT-723, and most offer improved performance characteristics including higher transition frequencies (250 MHz vs. 160 MHz) and lower saturation voltages.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant. The original BCR 166F E6327 does not specify RoHS status due to its obsolete classification.

Q: Which substitute offers the best inventory availability?

A: The PDTA143ZT,215 (Nexperia) offers the highest inventory availability with 65,523 units in stock, followed by DDTA143ZCA-7-F (Diodes Incorporated) with 111,300 units.

Q: Do the substitute parts require different PCB footprints?

A: The original BCR 166F E6327 uses SOT-723 packaging. All substitutes use SOT-23-3 / TO-236-3 packaging. While both are three-pin surface mount packages, the physical dimensions and pin spacing differ. PCB layout modification is required for substitution.

Q: What is the significance of the internal resistor values (4.7 kΩ and 47 kΩ)?

A: These internal resistors form the pre-biasing network of the transistor. The 4.7 kΩ base resistor and 47 kΩ emitter-base resistor establish the transistor's biasing characteristics. All substitute parts maintain these identical values to ensure functional equivalence.

Q: Can the PDTA143ZT,215 and PDTA143ZT,235 be used interchangeably?

A: Yes, the PDTA143ZT,215 and PDTA143ZT,235 are electrically identical. The difference is packaging format: PDTA143ZT,215 is supplied in Cut Tape (CT) & Digi-Reel®, while PDTA143ZT,235 is supplied in Tape & Reel (TR). Both maintain identical electrical specifications and performance characteristics.

Q: What does "pre-biased" mean in the context of these transistors?

A: Pre-biased transistors integrate internal resistors that establish a bias network, eliminating the need for external biasing resistors in many applications. This reduces component count and simplifies circuit design. The BCR 166F E6327 and all substitutes incorporate this integrated bias network.

Q: Are there any performance trade-offs when substituting the BCR 166F E6327?

A: Substitute parts generally offer performance improvements. The PDTA143ZT,215 and PDTA143ZT,235 provide lower saturation voltage (100 mV vs. 300 mV), while DDTA143ZCA-7-F, DTA143ZCA-TP, and DTA143ZKAT146 offer higher transition frequencies (250 MHz vs. 160 MHz). These represent enhancements rather than compromises.

Q: What is the moisture sensitivity level (MSL) classification?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts, including the original BCR 166F E6327, carry this classification.