2N4403RLRP Equivalent & Substitute Parts

Part Overview

The 2N4403RLRP is a PNP bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 600 mA maximum collector current. The device is packaged in a Through Hole TO-92 (TO-226) configuration and is designed for general-purpose switching and amplification applications. The 2N4403RLRP is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Direct substitutes from the active product line maintain identical electrical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	V
Current - Collector (Ic) (Max)	600	mA
Power - Max	625	mW
Frequency - Transition	200	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 150mA, 2V	—
Vce Saturation (Max) @ Ib, Ic	750mV @ 50mA, 500mA	—
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the 2N4403RLRP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): 40 V
Current - Collector (Ic) (Max): 600 mA
Power - Max: 625 mW (or higher)
Frequency - Transition: 200 MHz
DC Current Gain (hFE) (Min): 100 @ 150mA, 2V
Vce Saturation (Max): 750mV @ 50mA, 500mA
Operating Temperature Range: -55°C to 150°C

Mechanical Equivalence Criteria:

Mounting Type: Through Hole
Package / Case: TO-226-3 or TO-92-3 configuration

All substitute parts listed maintain identical electrical specifications and compatible package configurations. Substitutes are grouped by product status and compliance certifications to facilitate selection based on availability and regulatory requirements.

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency	hFE (Min)	Package	Product Status	RoHS Status	Inventory
2N4403RLRP	onsemi	600 mA	40 V	625 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Obsolete	RoHS non-compliant	997 Pcs
2N4403TA	onsemi	600 mA	40 V	625 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Active	ROHS3 Compliant	60100 Pcs
2N4403TAR	onsemi	600 mA	40 V	625 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Active	ROHS3 Compliant	20400 Pcs
2N4403TF	onsemi	600 mA	40 V	625 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Active	ROHS3 Compliant	1500 Pcs
2N4403TFR	onsemi	600 mA	40 V	625 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Active	ROHS3 Compliant	2300 Pcs
2N4403-AP	Micro Commercial Co	600 mA	40 V	600 mW	200 MHz	100 @ 150mA, 2V	TO-92-3	Obsolete	ROHS3 Compliant	1558 Pcs

Engineering Selection Recommendations

Primary Substitutes (onsemi Active Products):

The 2N4403TA, 2N4403TAR, 2N4403TF, and 2N4403TFR are direct electrical and mechanical equivalents manufactured by onsemi with active product status. These parts are recommended for new designs and production applications. All four variants maintain identical electrical specifications and are ROHS3 compliant, providing regulatory advantage over the obsolete 2N4403RLRP. Selection among these four onsemi variants should be based on packaging format (Cut Tape) and inventory availability. The 2N4403TA offers the highest inventory level at 60,100 pieces, providing supply chain stability for high-volume applications.

Secondary Substitute (Alternative Manufacturer):

The 2N4403-AP, manufactured by Micro Commercial Co, is electrically equivalent with identical electrical parameters and ROHS3 compliance. However, this part is classified as obsolete, limiting its suitability for long-term production commitments. The 2N4403-AP is appropriate only when onsemi variants are unavailable and existing inventory must be utilized.

Compliance Considerations:

All active substitute parts (2N4403TA, 2N4403TAR, 2N4403TF, 2N4403TFR) are ROHS3 compliant, whereas the original 2N4403RLRP is RoHS non-compliant. This compliance upgrade is significant for applications subject to RoHS directives. All parts maintain REACH unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the 2N4403TA directly replace the 2N4403RLRP in existing designs?

A: Yes. The 2N4403TA is electrically and mechanically equivalent to the 2N4403RLRP. Both devices share identical maximum ratings for collector current (600 mA), collector-emitter breakdown voltage (40 V), power dissipation (625 mW), transition frequency (200 MHz), and DC current gain specifications. Both use the TO-92-3 Through Hole package configuration. The primary difference is product status and RoHS compliance; the 2N4403TA is active and ROHS3 compliant.

Q: What is the difference between 2N4403TA, 2N4403TAR, 2N4403TF, and 2N4403TFR?

A: All four parts are electrically identical with the same maximum ratings and specifications. The differences are in packaging format designations and inventory levels. The suffix letters (TA, TAR, TF, TFR) indicate different packaging and tape configurations from onsemi. Selection should be based on your procurement system's compatibility with the specific packaging format and current inventory availability.

Q: Is the 2N4403-AP from Micro Commercial Co a suitable substitute?

A: The 2N4403-AP is electrically equivalent and ROHS3 compliant. However, it is classified as obsolete, which limits its long-term availability. Use the 2N4403-AP only when onsemi active variants are unavailable and existing inventory must be consumed. For new designs and ongoing production, onsemi active parts are preferred.

Q: Are there any differences in the TO-92-3 package between these parts?

A: All substitute parts use the TO-92-3 (TO-226-3) Through Hole package with formed leads. The package dimensions and pin configurations are identical across all listed parts, ensuring direct mechanical compatibility in existing PCB layouts.

Q: What is the significance of the RoHS compliance difference?

A: The 2N4403RLRP is RoHS non-compliant, while all active substitutes (2N4403TA, 2N4403TAR, 2N4403TF, 2N4403TFR) are ROHS3 compliant. RoHS3 compliance is required for products sold in the European Union and many other regulated markets. If your application is subject to RoHS directives, use only the compliant variants.

Q: Can I use these parts interchangeably in my circuit?

A: Yes, within the electrical and thermal operating conditions specified. All listed substitutes maintain the same electrical characteristics: 40 V maximum collector-emitter breakdown voltage, 600 mA maximum collector current, 625 mW maximum power dissipation, 200 MHz transition frequency, and -55°C to 150°C operating temperature range. Ensure your circuit design does not exceed these maximum ratings.

Q: Which substitute should I choose for a new design?

A: For new designs, select from the active onsemi variants: 2N4403TA, 2N4403TAR, 2N4403TF, or 2N4403TFR. The 2N4403TA is recommended due to its highest inventory level (60,100 pieces), ensuring supply chain continuity. All four are ROHS3 compliant and maintain active product status with onsemi.

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