NJL3281D Equivalent & Substitute Parts

Part Overview

The NJL3281D is an NPN bipolar junction transistor manufactured by onsemi, rated for 260 V collector-emitter breakdown voltage and 15 A maximum collector current. This device is designed for high-power switching and amplification applications in the 200 W power range with a transition frequency of 30 MHz. The NJL3281D is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The primary substitute maintains identical electrical specifications while offering improved compliance status and active product availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	15	A
Voltage - Collector Emitter Breakdown (Max)	260	V
Vce Saturation (Max) @ Ib, Ic	3 V @ 1 A, 10 A	—
Current - Collector Cutoff (Max)	50	µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	75	@ 5 A, 5 V
Power - Max	200	W
Frequency - Transition	30	MHz
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-264-5	—

Substitute Part Grouping Explanation

Substitution of the NJL3281D is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Identical transistor type (NPN)
Identical maximum collector current (15 A)
Identical maximum collector-emitter breakdown voltage (260 V)
Identical saturation voltage characteristics (3 V @ 1 A, 10 A)
Identical collector cutoff current (50 µA ICBO)
Identical DC current gain minimum (75 @ 5 A, 5 V)
Identical maximum power dissipation (200 W)
Identical transition frequency (30 MHz)
Identical operating temperature range (-65°C to 150°C)
Identical mounting type (Through Hole)
Identical package designation (TO-264-5)

The NJL3281DG meets all substitution criteria and is classified as an active product with improved regulatory compliance.

Parameter Comparison

Parameter	NJL3281D	NJL3281DG	Match
Manufacturer	onsemi	onsemi	Yes
Transistor Type	NPN	NPN	Yes
Current - Collector (Ic) (Max)	15 A	15 A	Yes
Voltage - Collector Emitter Breakdown (Max)	260 V	260 V	Yes
Vce Saturation (Max) @ Ib, Ic	3 V @ 1 A, 10 A	3 V @ 1 A, 10 A	Yes
Current - Collector Cutoff (Max)	50 µA (ICBO)	50 µA (ICBO)	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	75 @ 5 A, 5 V	75 @ 5 A, 5 V	Yes
Power - Max	200 W	200 W	Yes
Frequency - Transition	30 MHz	30 MHz	Yes
Operating Temperature Range	-65°C to 150°C (TJ)	-65°C to 150°C (TJ)	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	TO-264-5	TO-264-5	Yes
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute is Compliant

Engineering Selection Recommendations

The NJL3281DG is the direct equivalent substitute for the NJL3281D. Both parts are manufactured by onsemi and share identical electrical and mechanical specifications across all critical parameters. The NJL3281DG is preferred for new designs and production applications due to its active product status and ROHS3 compliance certification. The NJL3281D is classified as obsolete and should be replaced with the NJL3281DG in all new applications. Both parts maintain REACH Unaffected status and EAR99 export classification. The packaging difference (tube for NJL3281DG versus unspecified for NJL3281D) does not affect electrical performance or pin compatibility.

Frequently Asked Questions (FAQ)

Q: Can the NJL3281DG be used as a direct replacement for the NJL3281D?

A: Yes. The NJL3281DG is electrically and mechanically identical to the NJL3281D across all specified parameters, including collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and operating temperature range. Both devices use the TO-264-5 package with identical pinout and mounting requirements.

Q: What is the primary reason to substitute the NJL3281D?

A: The NJL3281D is classified as obsolete. The NJL3281DG provides the same electrical performance with active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for production applications.

Q: Are there any differences in thermal or mechanical performance between these parts?

A: No. Both parts are rated for identical maximum power dissipation (200 W), operating temperature range (-65°C to 150°C), and use the same TO-264-5 through-hole package. Thermal characteristics and mechanical mounting are equivalent.

Q: Does the packaging format (tube) affect compatibility?

A: No. The tube packaging for the NJL3281DG is a supply format only and does not affect electrical performance, pin configuration, or mechanical fit. The device remains compatible with identical PCB layouts and socket configurations.

Q: Are both parts compliant with current regulatory standards?

A: The NJL3281DG is ROHS3 compliant. The NJL3281D is RoHS non-compliant. Both parts maintain REACH Unaffected status. For applications requiring RoHS compliance, the NJL3281DG is the appropriate selection.

Q: What is the base product number for these parts?

A: Both the NJL3281D and NJL3281DG share the base product number NJL3281. The suffix designations indicate packaging and compliance variations only.

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