RN1907FE,LF(CT Pre-Biased Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The RN1907FE,LF(CT is a pre-biased dual NPN bipolar transistor manufactured by Toshiba Semiconductor and Storage in SOT-563/ES6 surface mount packaging. This component integrates two NPN transistors with internal biasing resistors, designed for applications requiring compact switching and amplification circuits. The part operates at 50V maximum collector-emitter breakdown voltage with 100mA maximum collector current and 250MHz transition frequency.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified sources. All substitute parts listed maintain electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Transistor Type	2 NPN - Pre-Biased (Dual)	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	10	kOhms
Resistor - Emitter Base (R2)	47	kOhms
Frequency - Transition	250	MHz
Power - Max	100	mW
Package / Case	SOT-563, SOT-666	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RN1907FE,LF(CT is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor configuration: 2 NPN - Pre-Biased (Dual)
Maximum collector current: 100mA
Maximum collector-emitter breakdown voltage: 50V
Base resistor (R1): 10kOhms
Emitter-base resistor (R2): 47kOhms
Transition frequency: 250MHz
Surface mount packaging: SOT-563 or SOT-666

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents: Parts with identical internal resistor values (R1 = 10kOhms, R2 = 47kOhms) and matching transistor configuration. These parts include DDC114YH-7 and NSVBC114YDXV6T1G, which maintain the same biasing network as the primary part.

Category B - Functional Alternatives: Parts with different internal resistor configurations (DDC114EH-7, DDC143EH-7, DDC144EH-7) that provide equivalent switching performance but with modified biasing characteristics. These parts are suitable when circuit design permits adjustment for different base resistor values.

Category C - Enhanced Performance Variants: Parts with higher maximum power ratings (EMD4DXV6T1G, EMD4DXV6T5G, NSBC114YDXV6T1G, NSBC114YDXV6T5G) that exceed the 100mW specification while maintaining core electrical parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Ic (Max) mA	Vce Breakdown (Max) V	R1 (Base) kOhms	R2 (Emitter-Base) kOhms	Frequency MHz	Power (Max) mW	Product Status
RN1907FE,LF(CT	Toshiba	100	50	10	47	250	100	Active
DDC114EH-7	Diodes Incorporated	100	50	10	10	250	150	Active
DDC114TH-7	Diodes Incorporated	100	50	10	—	250	150	Active
DDC114YH-7	Diodes Incorporated	100	50	10	47	250	150	Active
DDC143EH-7	Diodes Incorporated	100	50	4.7	4.7	250	150	Active
DDC144EH-7	Diodes Incorporated	100	50	47	47	250	150	Active
EMD4DXV6T1G	onsemi	100	50	47, 10	47	—	500	Active
EMD4DXV6T5G	onsemi	100	50	47, 10	47	—	500	Obsolete
NSBC114YDXV6T1G	Fairchild Semiconductor	100	50	10	47	—	500	Active
NSBC114YDXV6T5G	onsemi	100	50	10	47	—	500	Obsolete
NSVBC114YDXV6T1G	onsemi	100	50	10	47	—	500	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

DDC114YH-7 (Diodes Incorporated) and NSVBC114YDXV6T1G (onsemi) are the preferred substitutes for the RN1907FE,LF(CT. Both parts maintain identical internal resistor configurations (R1 = 10kOhms, R2 = 47kOhms) and are classified as Active products with ROHS3 compliance and MSL 1 rating. These parts provide enhanced power dissipation capability (150mW and 500mW respectively) compared to the primary part's 100mW specification, ensuring thermal margin in existing circuit designs.

Secondary Substitutes (Application-Dependent Selection):

DDC114EH-7 (Diodes Incorporated) operates with modified emitter-base resistor configuration (R2 = 10kOhms instead of 47kOhms), resulting in different biasing characteristics. This part is suitable for applications where circuit design permits adjustment to the modified base resistor network. Product status is Active with ROHS3 compliance.

DDC144EH-7 (Diodes Incorporated) features significantly different base resistor values (R1 = 47kOhms, R2 = 47kOhms). Selection of this part requires circuit redesign to accommodate the modified biasing network. Product status is Active with ROHS3 compliance.

Obsolete Parts (Not Recommended for New Designs):

EMD4DXV6T5G and NSBC114YDXV6T5G are classified as Obsolete and should not be selected for new product development. These parts remain available in inventory but lack active manufacturer support.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, matching the primary part's environmental qualification. All parts are classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can DDC114YH-7 be used as a direct replacement for RN1907FE,LF(CT in existing circuit boards?

A: Yes. DDC114YH-7 maintains identical internal resistor values (R1 = 10kOhms, R2 = 47kOhms), maximum collector current (100mA), collector-emitter breakdown voltage (50V), and transition frequency (250MHz). The part is packaged in SOT-563, matching the primary part's footprint. No circuit modifications are required.

Q: What is the difference between DDC114EH-7 and DDC114YH-7?

A: The primary difference is the emitter-base resistor (R2) value. DDC114YH-7 has R2 = 47kOhms, matching the RN1907FE,LF(CT specification. DDC114EH-7 has R2 = 10kOhms, which modifies the biasing network and requires circuit evaluation before substitution.

Q: Why do some substitute parts list transition frequency as "—" (not specified)?

A: EMD4DXV6T1G, EMD4DXV6T5G, NSBC114YDXV6T1G, and NSBC114YDXV6T5G do not provide transition frequency specifications in the available technical data. These parts are functionally compatible based on other electrical parameters but should be evaluated for frequency-dependent applications.

Q: Are the EMD4DXV6 series parts suitable replacements?

A: EMD4DXV6T1G is an Active product with enhanced power rating (500mW) and compatible electrical parameters. However, this part contains one NPN and one PNP transistor configuration, differing from the dual NPN configuration of the RN1907FE,LF(CT. Selection requires verification that the circuit design accommodates the different transistor types.

Q: What is the significance of the "T1G" and "T5G" suffixes in onsemi part numbers?

A: These suffixes indicate manufacturing date codes and tape reel specifications. T1G represents current production, while T5G indicates an older date code. Parts with T5G suffix are classified as Obsolete and should not be selected for new designs.

Q: Can DDC143EH-7 or DDC144EH-7 be used in place of RN1907FE,LF(CT?

A: These parts have significantly different internal resistor configurations (R1 and R2 values differ from the primary part). While they maintain the same maximum electrical ratings, substitution requires circuit redesign to accommodate the modified biasing network. These parts are suitable only when circuit design permits adjustment for different base resistor values.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts are available in SOT-563 and SOT-666 packaging, matching the primary part's surface mount footprint. Mounting type is Surface Mount for all listed parts.

Q: What is the inventory status of substitute parts?

A: DDC114YH-7 has 24,100 pieces in stock. DDC114EH-7 has 25,730 pieces. NSVBC114YDXV6T1G has 45,300 pieces. These inventory levels indicate consistent availability from multiple manufacturers.

Q: Do all substitute parts meet the same environmental compliance standards?

A: All recommended Active substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) rating, matching the primary part's environmental qualifications. Obsolete parts (EMD4DXV6T5G and NSBC114YDXV6T5G) also maintain these certifications but lack active manufacturer support.

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