Equivalent & Substitute Parts for 2SD1624T-TD-H

Part Overview

The 2SD1624T-TD-H is an NPN bipolar junction transistor manufactured by onsemi, rated for 50 V collector-emitter breakdown voltage and 3 A maximum collector current. This surface mount device in TO-243AA package delivers 500 mW maximum power dissipation with 150 MHz transition frequency. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. Substitute parts are selected based on matching or exceeding critical electrical parameters while maintaining compatible package and mounting specifications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	3	A
Power - Max	500	mW
Frequency - Transition	150	MHz
Vce Saturation (Max) @ Ib, Ic	500mV @ 100mA, 2A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 100mA, 2V	—
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-243AA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 2SD1624T-TD-H are categorized based on electrical parameter compatibility and product status. The primary substitution criteria are:

Critical Parameters for Substitution:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): ≥ 50 V
Current - Collector (Ic) (Max): ≥ 3 A
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Substitution Categories:

Direct Equivalents (Active Status): Parts maintaining identical electrical specifications and package compatibility. The 2SD1624T-TD-E represents the active equivalent with identical ratings but different packaging format (Tape & Reel vs. original packaging).

Enhanced Performance Substitutes: Parts exceeding the original specifications in power dissipation and/or transition frequency while maintaining minimum required current and voltage ratings. Examples include 2SC5964-TD-E and 2SC5964-TD-H, which provide 3.5 W power rating and 380 MHz transition frequency.

Compatible Alternatives: Parts meeting or exceeding core electrical requirements (50 V, 3 A, NPN) but with different package types (SOT-89-3, SOT-223) or slightly different saturation characteristics. These include 2DC4672-13, DNLS350Y-13, FCX619TA, FZT690BQTA, and FZT690BTA.

Reduced Current Alternatives: Parts rated for lower maximum collector current (2 A instead of 3 A) such as 2SC5994-TD-E and 2SC2873-Y(TE12L,ZC, suitable only for applications not requiring full 3 A capability.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) [A]	Vce Breakdown (Max) [V]	Power (Max) [mW]	Frequency [MHz]	Vce Sat (Max) [mV]	hFE (Min)	Package	Supplier Device Package
2SD1624T-TD-H	onsemi	Obsolete	3	50	500	150	500	200	TO-243AA	PCP
2SD1624T-TD-E	onsemi	Active	3	50	500	150	500	200	TO-243AA	PCP
2SC5964-TD-E	onsemi	Active	3	50	3500	380	290	200	TO-243AA	PCP
2SC5964-TD-H	onsemi	Active	3	50	3500	380	290	200	TO-243AA	PCP
2SC5994-TD-E	onsemi	Active	2	50	1300	420	300	200	TO-243AA	PCP
2DC4672-13	Diodes Incorporated	Active	3	50	900	180	350	82	TO-243AA	SOT-89-3
2SC2873-Y(TE12L,ZC	Toshiba Semiconductor and Storage	Active	2	50	500	120	500	70	TO-243AA	PW-MINI
DNLS350Y-13	Diodes Incorporated	Active	3	50	1000	100	370	300	TO-243AA	SOT-89-3
FCX619TA	Diodes Incorporated	Active	3	50	2000	165	320	100	TO-243AA	SOT-89-3
FZT690BQTA	Diodes Incorporated	Active	3	45	1200	150	500	500	TO-261-4, TO-261AA	SOT-223
FZT690BTA	Diodes Incorporated	Active	3	45	2000	150	500	150	TO-261-4, TO-261AA	SOT-223-3

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

The 2SD1624T-TD-E is the manufacturer-recommended active equivalent. This part maintains identical electrical specifications to the obsolete 2SD1624T-TD-H, including 3 A collector current, 50 V breakdown voltage, 500 mW power rating, and 150 MHz transition frequency. Both parts are ROHS3 compliant and carry identical saturation and gain characteristics. The primary difference is packaging format (Tape & Reel vs. original). This part is currently in active production with 19,388 units in stock.

Enhanced Performance Alternative:

The 2SC5964-TD-E and 2SC5964-TD-H offer superior performance characteristics while maintaining full backward compatibility. These parts provide 3.5 W power dissipation (7× the original), 380 MHz transition frequency (2.5× the original), and improved saturation voltage (290 mV vs. 500 mV). Both maintain the 3 A current rating and 50 V breakdown voltage. These parts are suitable for applications requiring higher switching speeds or thermal headroom. The 2SC5964-TD-H variant is available in higher quantity (4,829 units).

Alternative Substitutes for Package-Flexible Designs:

For applications permitting package variation, the Diodes Incorporated FCX619TA provides 3 A capability with 50 V rating in SOT-89-3 package, offering 2 W power dissipation and 165 MHz transition frequency. The DNLS350Y-13 similarly supports 3 A at 50 V with enhanced DC current gain (300 @ 1A, 2V) in SOT-89-3 package.

Not Recommended for Full Current Applications:

The 2SC5994-TD-E and 2SC2873-Y(TE12L,ZC are rated for maximum 2 A collector current and are unsuitable for applications requiring the full 3 A capability of the original part.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and are manufactured by established semiconductor suppliers with active product status. Selection should account for specific package requirements and thermal management capabilities of the target application.

Frequently Asked Questions (FAQ)

Q: Can the 2SD1624T-TD-E directly replace the 2SD1624T-TD-H in existing designs?

A: Yes. The 2SD1624T-TD-E is the active equivalent with identical electrical specifications. The primary difference is packaging format (Tape & Reel). Both parts are rated for 3 A, 50 V, 500 mW, and 150 MHz. Electrical performance is equivalent.

Q: What is the advantage of using 2SC5964-TD-E or 2SC5964-TD-H over the direct equivalent?

A: The 2SC5964 series provides enhanced performance with 3.5 W power dissipation (versus 500 mW), 380 MHz transition frequency (versus 150 MHz), and lower saturation voltage (290 mV versus 500 mV). These improvements provide better thermal performance and faster switching capability while maintaining the same 3 A current and 50 V voltage ratings. Selection depends on application requirements for switching speed and thermal management.

Q: Are the Diodes Incorporated alternatives (FCX619TA, DNLS350Y-13) compatible with the original part?

A: These parts are compatible for applications where package change is acceptable. Both support 3 A at 50 V in SOT-89-3 package. The FCX619TA provides 2 W power dissipation and 165 MHz frequency. The DNLS350Y-13 provides 1 W power dissipation and 100 MHz frequency with higher DC current gain (300 @ 1A, 2V). Package footprint differences must be evaluated for PCB layout compatibility.

Q: Why are 2SC5994-TD-E and 2SC2873-Y(TE12L,ZC listed as alternatives if they are rated for only 2 A?

A: These parts are listed as similar alternatives for applications not requiring the full 3 A capability. The 2SC5994-TD-E maintains 50 V rating with 2 A maximum current, 420 MHz frequency, and 1.3 W power. The 2SC2873-Y(TE12L,ZC provides 2 A at 50 V with 500 mW power. These are suitable only for reduced-current circuit implementations.

Q: What is the difference between FZT690BQTA and FZT690BTA?

A: Both parts are rated for 3 A at 45 V (slightly lower than the original 50 V) with 150 MHz transition frequency. The FZT690BQTA is packaged in Tape & Reel format with automotive qualification (AEC-Q101) and 1.2 W power rating. The FZT690BTA is in Cut Tape format with 2 W power rating. The FZT690BQTA is suitable for automotive applications requiring AEC-Q101 qualification.

Q: Can I use a substitute part with lower voltage rating (45 V) in a 50 V design?

A: No. The FZT690BQTA and FZT690BTA are rated for 45 V maximum breakdown voltage, which is below the original 50 V specification. These parts are not suitable for applications requiring 50 V margin. Use only substitutes rated for 50 V or higher breakdown voltage.

Q: What packaging considerations apply when selecting a substitute?

A: The original 2SD1624T-TD-H uses TO-243AA package with PCP supplier device package. Direct equivalents (2SD1624T-TD-E, 2SC5964 series) maintain this package. Alternative substitutes use different packages: FCX619TA and DNLS350Y-13 use SOT-89-3; FZT690BQTA and FZT690BTA use SOT-223. PCB layout, thermal management, and lead configuration must be verified before substitution.

Q: Are all recommended substitutes RoHS3 compliant?

A: Yes. All parts listed in the parameter comparison table are ROHS3 compliant. Compliance status is verified for each part number.

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