RN1103ACT(TPL3) Equivalent & Substitute Parts

Part Overview

The RN1103ACT(TPL3) is a pre-biased NPN bipolar junction transistor (BJT) manufactured by Toshiba Semiconductor and Storage. This surface mount device is rated for 50 V collector-emitter breakdown voltage and 80 mA maximum collector current, with integrated base and emitter-base resistors of 22 kOhms each. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, collector current capacity, resistor values, and saturation characteristics.

Substiute Parts

RN1103ACT(TPL3)

Toshiba Semiconductor and StorageIn Stock: 934RN1103ACT(TPL3) Datasheet

Current PartRFQ

RN1103MFV,L3F

Toshiba Semiconductor and StorageIn Stock: 6615RN1103MFV,L3F Datasheet

SimilarRFQ

PDTC124EM,315

NXP SemiconductorsIn Stock: 1012304PDTC124EM,315 Datasheet

SimilarRFQ

PDTC124EMB,315

NXP USA Inc.In Stock: 290866PDTC124EMB,315 Datasheet

SimilarRFQ

PDTC124TM,315

Nexperia USA Inc.In Stock: 1066PDTC124TM,315 Datasheet

SimilarRFQ

PDTC124TMB,315

Nexperia USA Inc.In Stock: 873PDTC124TMB,315 Datasheet

SimilarRFQ

PDTC124XM,315

Nexperia USA Inc.In Stock: 1148PDTC124XM,315 Datasheet

SimilarRFQ

PDTC124XMB,315

NXP SemiconductorsIn Stock: 148075PDTC124XMB,315 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN1103ACT(TPL3) is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor type must be NPN pre-biased
• Voltage rating must equal or exceed 50 V collector-emitter breakdown
• Collector current capacity must equal or exceed 80 mA
• Base resistor (R1) must equal 22 kOhms
• Emitter-base resistor (R2) must equal 22 kOhms
• DC current gain (hFE) minimum specification must be met at rated conditions
• Saturation voltage characteristics must be compatible with application requirements
• Mounting type must be surface mount
• Package footprint must be compatible with SC-101 or SOT-883 specifications

Secondary Compatibility Factors:

• Power dissipation rating (minimum 100 mW)
• Collector cutoff current specifications
• Moisture sensitivity level (MSL 1 or better)

Substitute parts listed below meet all primary criteria. Parts with higher current ratings, power dissipation, or improved specifications are acceptable for direct substitution in applications designed for the RN1103ACT(TPL3).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes with Identical Resistor Configuration (R1 = 22 kOhms, R2 = 22 kOhms):

RN1103MFV,L3F (Toshiba) and PDTC124EMB,315 (NXP USA Inc.) provide the closest electrical match to the RN1103ACT(TPL3). Both maintain the 22 kOhms base and emitter-base resistor values. RN1103MFV,L3F is an active product from the original manufacturer with higher current capacity (100 mA) and power rating (150 mW). PDTC124EMB,315 offers enhanced specifications including 250 mW power dissipation and improved saturation characteristics. Both parts are MSL 1 rated and suitable for direct substitution in SC-101 or SOT-883 packages.

Automotive-Qualified Alternatives:

PDTC124TM,315, PDTC124TMB,315, PDTC124XM,315, and PDTC124XMB,315 (Nexperia USA Inc.) are AEC-Q100 qualified automotive-grade devices. These parts are active products with enhanced reliability specifications. PDTC124TM,315 and PDTC124TMB,315 maintain the 22 kOhms emitter-base resistor value. PDTC124XM,315 and PDTC124XMB,315 feature a 47 kOhms emitter-base resistor, which alters bias characteristics and requires circuit evaluation before substitution.

Compliance and Availability:

All substitute parts listed are active products with current manufacturing status, ensuring long-term availability. PDTC124EM,315 (NXP Semiconductors) is available in bulk packaging with the highest inventory level (1,012,204 units). RoHS3 compliance is confirmed for Nexperia products (PDTC124TM,315, PDTC124TMB,315, PDTC124XM,315, PDTC124XMB,315). REACH compliance status is unaffected for all Nexperia and NXP products listed.

Package Compatibility:

The RN1103ACT(TPL3) uses SC-101 or SOT-883 packaging. Substitute parts maintain compatibility with these footprints, except RN1103MFV,L3F (SOT-723) and PDTC124TMB,315 (3-XFDFN), which require PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can RN1103MFV,L3F directly replace RN1103ACT(TPL3) without circuit modification?

A: Yes. RN1103MFV,L3F maintains identical base and emitter-base resistor values (22 kOhms each), voltage rating (50 V), and DC current gain specifications. The higher collector current rating (100 mA vs. 80 mA) and power dissipation (150 mW vs. 100 mW) provide improved margin. Package footprint compatibility must be verified; RN1103MFV,L3F uses SOT-723 while the original uses SC-101 or SOT-883.

Q: What is the difference between PDTC124XM,315 and PDTC124TM,315?

A: Both are Nexperia AEC-Q100 qualified automotive devices with 50 V rating and 100 mA collector current. The primary difference is the emitter-base resistor: PDTC124TM,315 has 22 kOhms (matching RN1103ACT(TPL3)), while PDTC124XM,315 has 47 kOhms. The 47 kOhms value reduces base current and alters bias conditions, requiring circuit analysis before substitution.

Q: Are all substitute parts RoHS compliant?

A: RoHS3 compliance is confirmed for Nexperia products (PDTC124TM,315, PDTC124TMB,315, PDTC124XM,315, PDTC124XMB,315). RN1103MFV,L3F is RoHS compliant. PDTC124EM,315 and PDTC124EMB,315 do not specify RoHS status in provided documentation.

Q: Which substitute part has the best availability?

A: PDTC124EM,315 (NXP Semiconductors) has the highest inventory level at 1,012,204 units in bulk packaging. For tape and reel packaging, PDTC124XMB,315 offers 148,051 units.

Q: Can PDTC124XMB,315 be used in place of RN1103ACT(TPL3)?

A: PDTC124XMB,315 meets the voltage (50 V) and collector current (100 mA) requirements. However, the emitter-base resistor is 47 kOhms instead of 22 kOhms, which reduces base current and increases switching delay. This part is suitable only if circuit design accommodates the altered bias characteristics. Automotive qualification (AEC-Q100) and enhanced power rating (250 mW) provide additional benefits.

Q: What is the significance of the MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture bake requirements. All listed substitute parts carry MSL 1 rating, matching the original RN1103ACT(TPL3) specification.

Q: Are there package footprint differences between substitute parts?

A: Yes. RN1103ACT(TPL3) uses SC-101 or SOT-883. RN1103MFV,L3F uses SOT-723 (smaller footprint). PDTC124TMB,315 and PDTC124XMB,315 use 3-XFDFN (DFN1006B-3). PCB layout verification is required when switching between package types.

Q: Which substitute part is recommended for new automotive designs?

A: PDTC124TM,315 or PDTC124TMB,315 (Nexperia USA Inc.) are recommended for automotive applications. Both carry AEC-Q100 qualification, ROHS3 compliance, and REACH unaffected status. PDTC124TM,315 maintains the 22 kOhms emitter-base resistor for direct electrical compatibility.