2SD16400R Equivalent & Substitute Parts

Part Overview

The 2SD16400R is an NPN Darlington bipolar junction transistor manufactured by Panasonic Electronic Components, designed for through-hole applications in the TO-126B-A1 package. This device is rated for 100 V collector-emitter breakdown voltage and 2 A maximum collector current, with a maximum power dissipation of 1.2 W. The 2SD16400R is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	2	A
Power - Max	1.2	W
Vce Saturation (Max)	1.5	V @ 1mA, 1A
DC Current Gain (hFE) (Min)	8000	@ 1A, 10V
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-225AA, TO-126-3	—

Substitute Part Grouping Explanation

Substitution of the 2SD16400R is determined by electrical and mechanical compatibility within the NPN Darlington transistor category. The critical parameters governing substitution are:

Electrical Compatibility Criteria:

Transistor type classification (NPN - Darlington)
Voltage rating: minimum 100 V collector-emitter breakdown voltage
Current rating: minimum 2 A maximum collector current
Power dissipation: minimum 1.2 W
Operating temperature range: minimum 150°C junction temperature
Package compatibility: TO-126-3 or equivalent through-hole configuration

The KSD1692YS from onsemi meets these substitution criteria. This device maintains the same voltage and temperature specifications while exceeding the current and power ratings of the original part. Both devices are classified as NPN Darlington transistors with compatible through-hole packaging, enabling direct functional substitution in applications designed for the 2SD16400R.

Parameter Comparison

Parameter	2SD16400R (Panasonic)	KSD1692YS (onsemi)	Unit
Transistor Type	NPN - Darlington	NPN - Darlington	—
Voltage - Collector Emitter Breakdown (Max)	100	100	V
Current - Collector (Ic) (Max)	2	3	A
Power - Max	1.2	1.3	W
Vce Saturation (Max)	1.5	1.2	V
Operating Temperature (TJ)	150	150	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	TO-225AA, TO-126-3	TO-225AA, TO-126-3	—
Product Status	Obsolete	Active	—

Engineering Selection Recommendations

The KSD1692YS is a suitable substitute for the 2SD16400R based on the following factors:

Product Status: The 2SD16400R is obsolete, while the KSD1692YS is active and currently in production. This ensures long-term availability and supply chain continuity for new designs and ongoing production requirements.

Electrical Specifications: The KSD1692YS exceeds the electrical requirements of the 2SD16400R across all critical parameters. The substitute device provides higher maximum collector current (3 A versus 2 A) and equivalent voltage ratings (100 V). The lower saturation voltage (1.2 V versus 1.5 V) represents an improvement in switching performance.

Compliance and Certifications: The KSD1692YS is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components. Both devices share the same ECCN and HTSUS classifications.

Package Compatibility: Both devices utilize the TO-126-3 through-hole package, enabling direct mechanical substitution without circuit board redesign or layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the KSD1692YS directly replace the 2SD16400R in existing applications?

A: Yes. The KSD1692YS is electrically and mechanically compatible with the 2SD16400R. Both devices are NPN Darlington transistors with identical 100 V voltage ratings and compatible TO-126-3 through-hole packages. The KSD1692YS provides higher current and power ratings, making it suitable for applications designed for the 2SD16400R.

Q: What are the key differences between these two transistors?

A: The primary differences are product status and performance specifications. The 2SD16400R is obsolete, while the KSD1692YS is active. The KSD1692YS provides higher maximum collector current (3 A versus 2 A), slightly higher power dissipation (1.3 W versus 1.2 W), and lower saturation voltage (1.2 V versus 1.5 V). These differences favor the substitute device in most applications.

Q: Are there package considerations when substituting these parts?

A: Both devices use the TO-126-3 through-hole package configuration. The physical dimensions and pin assignments are compatible, allowing direct substitution without printed circuit board modifications.

Q: What compliance standards apply to the KSD1692YS?

A: The KSD1692YS is RoHS3 compliant and REACH unaffected. Both the original 2SD16400R and substitute KSD1692YS share the same ECCN (EAR99) and HTSUS (8541.29.0095) classifications.

Q: Why is the 2SD16400R obsolete?

A: The 2SD16400R is classified as obsolete by Panasonic Electronic Components. The KSD1692YS from onsemi provides equivalent functionality with active production status and improved electrical specifications, making it the recommended substitute for new designs and ongoing production support.

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