RN1907,LF Equivalent & Substitute Parts

Part Overview

The RN1907,LF is a pre-biased dual NPN bipolar transistor (BJT) manufactured by Toshiba Semiconductor and Storage in a 6-TSSOP surface mount package. This component integrates two NPN transistors with internal biasing resistors, designed for switching and amplification applications requiring 50V collector-emitter breakdown voltage and 100mA maximum collector current. The RN1907,LF is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

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
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 10mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	300	mV @ 250µA, 5mA
Current - Collector Cutoff (Max)	500	nA
Frequency - Transition	250	MHz
Power - Max	200	mW
Mounting Type	Surface Mount	—
Package / Case	6-TSSOP, SC-88, SOT-363	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RN1907,LF is determined by strict electrical and mechanical parameter matching. The critical parameters that define substitutability are:

Electrical Parameters:

Transistor configuration: 2 NPN - Pre-Biased (Dual)
Maximum collector current: 100mA
Collector-emitter breakdown voltage: 50V
Internal base resistor (R1): 10kOhms
Internal emitter-base resistor (R2): 47kOhms
Transition frequency: 250MHz
Power dissipation capability: minimum 200mW

Mechanical Parameters:

Surface mount package: 6-TSSOP, SC-88, or SOT-363
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications and active product status, including RN1907,LF(CT from Toshiba and PUMH9 series variants from Nexperia.

Functional Equivalents: Parts meeting all electrical parameter requirements with enhanced power ratings or improved specifications, including UMH9NTN from Rohm Semiconductor and ACX114YUQ series from Diodes Incorporated.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Ic (Max) mA	Vce Breakdown (Max) V	R1 (Base) kOhms	R2 (Emitter-Base) kOhms	Frequency MHz	Power (Max) mW	Package	Product Status
RN1907,LF	Toshiba	2 NPN - Pre-Biased (Dual)	100	50	10	47	250	200	6-TSSOP	Obsolete
RN1907,LF(CT	Toshiba	2 NPN - Pre-Biased (Dual)	100	50	10	47	250	200	6-TSSOP	Active
PUMH9,115	Nexperia USA Inc.	2 NPN - Pre-Biased (Dual)	100	50	10	47	—	300	6-TSSOP	Active
PUMH9,125	Nexperia USA Inc.	2 NPN - Pre-Biased (Dual)	100	50	10	47	—	300	6-TSSOP	Active
PUMH9,135	Nexperia USA Inc.	2 NPN - Pre-Biased (Dual)	100	50	10	47	—	300	6-TSSOP	Active
PUMH9,165	Nexperia USA Inc.	2 NPN - Pre-Biased (Dual)	100	50	10	47	—	300	6-TSSOP	Active
UMH9NTN	Rohm Semiconductor	2 NPN - Pre-Biased (Dual)	100	50	10	47	250	150	6-TSSOP	Active
ACX114YUQ-7R	Diodes Incorporated	1 NPN, 1 PNP - Pre-Biased (Dual)	100	50	10	47	250	270	SOT-363	Active
ACX114YUQ-13R	Diodes Incorporated	1 NPN, 1 PNP - Pre-Biased (Dual)	100	50	10	47	250	270	SOT-363	Active
ADC114YUQ-7	Diodes Incorporated	2 NPN - Pre-Biased (Dual)	100	50	10, 47	10, 47	250	270	SOT-363	Active
ADC114YUQ-13	Diodes Incorporated	2 NPN - Pre-Biased (Dual)	100	50	10, 47	10, 47	250	270	SOT-363	Active

Engineering Selection Recommendations

Primary Recommendation: RN1907,LF(CT

The RN1907,LF(CT from Toshiba Semiconductor and Storage is the direct equivalent replacement. This part maintains identical electrical specifications to the original RN1907,LF, including 100mA maximum collector current, 50V collector-emitter breakdown voltage, 10kOhms base resistor, 47kOhms emitter-base resistor, and 250MHz transition frequency. The RN1907,LF(CT is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. This part is supplied in Tape & Reel packaging with 1121 units in stock.

Secondary Recommendation: PUMH9,135

The PUMH9,135 from Nexperia USA Inc. is a functional equivalent offering enhanced power dissipation at 300mW compared to the original 200mW specification. This part maintains all critical electrical parameters: 100mA collector current, 50V breakdown voltage, 10kOhms base resistor, and 47kOhms emitter-base resistor. The PUMH9,135 is active in production with ROHS3 compliance and REACH unaffected status. Inventory availability is 10,763 units.

Tertiary Recommendation: UMH9NTN

The UMH9NTN from Rohm Semiconductor provides an alternative with active product status and extensive inventory (305,100 units). This part maintains the 100mA collector current, 50V breakdown voltage, 10kOhms base resistor, 47kOhms emitter-base resistor, and 250MHz transition frequency. The UMH9NTN operates at 150mW maximum power, which is lower than the original specification but suitable for applications not requiring the full 200mW dissipation capability. ROHS3 compliance and REACH unaffected status are confirmed.

Automotive-Grade Alternative: ADC114YUQ-7 or ADC114YUQ-13

For applications requiring automotive qualification, the ADC114YUQ-7 and ADC114YUQ-13 from Diodes Incorporated meet AEC-Q101 qualification standards. Both parts maintain 100mA collector current, 50V breakdown voltage, and 250MHz transition frequency with 270mW power dissipation. These parts are configured as 2 NPN - Pre-Biased (Dual) transistors with selectable internal resistor configurations. Product status is active with ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the RN1907,LF be directly replaced with RN1907,LF(CT?

A: Yes. The RN1907,LF(CT is the direct equivalent with identical electrical specifications. The primary difference is packaging format: RN1907,LF(CT is supplied in Tape & Reel format for automated assembly, while the original RN1907,LF was supplied in alternative packaging. Both parts are 6-TSSOP surface mount packages with identical pin configurations and electrical performance.

Q: What is the difference between PUMH9,115, PUMH9,125, PUMH9,135, and PUMH9,165?

A: All four Nexperia PUMH9 variants maintain identical electrical specifications for collector current (100mA), breakdown voltage (50V), and internal resistor values (10kOhms base, 47kOhms emitter-base). The numeric suffixes (115, 125, 135, 165) indicate different manufacturing date codes or tape reel configurations. From an electrical substitution perspective, these parts are interchangeable. PUMH9,135 has the highest inventory availability at 10,763 units.

Q: Why does the UMH9NTN have lower maximum power (150mW) than the original RN1907,LF (200mW)?

A: The UMH9NTN is a functional equivalent that meets all critical electrical parameters for switching and amplification applications. The lower power rating reflects the thermal design of the Rohm UMT6 package variant. Applications operating within 150mW dissipation limits experience no functional difference. Applications requiring the full 200mW specification should select PUMH9 series parts (300mW) or Diodes ACX114/ADC114 series (270mW).

Q: Are ACX114YUQ and ADC114YUQ parts suitable replacements for the RN1907,LF?

A: The ACX114YUQ series (1 NPN, 1 PNP configuration) and ADC114YUQ series (2 NPN configuration) are functional equivalents meeting all critical electrical parameters. The ADC114YUQ-7 and ADC114YUQ-13 are direct 2 NPN configurations matching the RN1907,LF transistor type. All Diodes parts feature automotive-grade qualification (AEC-Q101) and enhanced power dissipation (270mW). These parts are suitable for applications requiring higher reliability standards or automotive compliance.

Q: What is the significance of the SOT-363 package designation for Diodes parts?

A: SOT-363 is an alternative designation for the 6-TSSOP package used in the RN1907,LF. The Diodes ACX114 and ADC114 series are supplied in SOT-363 packaging, which is mechanically and electrically compatible with the original 6-TSSOP package. Pin configurations and footprints are identical, allowing direct PCB substitution without layout modifications.

Q: Which substitute part has the highest inventory availability?

A: The UMH9NTN from Rohm Semiconductor has the highest inventory availability at 305,100 units. This part maintains all critical electrical parameters and is suitable for high-volume production requirements. The PUMH9,135 from Nexperia is the second-highest with 10,763 units available.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—RN1907,LF(CT, PUMH9 series, UMH9NTN, ACX114YUQ series, and ADC114YUQ series—are confirmed ROHS3 compliant. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original RN1907,LF specification.

Q: Can the RN1907,LF be used in automotive applications?

A: The original RN1907,LF does not carry automotive qualification. For automotive applications requiring AEC-Q101 qualification, select the ADC114YUQ-7, ADC114YUQ-13, ACX114YUQ-7R, or ACX114YUQ-13R from Diodes Incorporated. These parts maintain identical electrical specifications with automotive-grade certification.

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