S8025NTP Equivalent & Substitute Parts

Part Overview

The S8025NTP is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc., rated for 800V off-state voltage with 25A RMS on-state current capability. This thyristor is designed for surface mount applications in the TO-263 (D2PAK) package and maintains active product status with full RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical ratings, thermal characteristics, and mechanical compatibility within the TO-263 package family.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It RMS)	25	A
Voltage - On State (Vtm) Max	1.6	V
Voltage - Gate Trigger (Vgt) Max	1.5	V
Current - Gate Trigger (Igt) Max	35	mA
Current - Hold (Ih) Max	50	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	-
SCR Type	Standard Recovery	-

Substitute Part Grouping Explanation

Substitution eligibility for the S8025NTP is determined by the following critical parameters:

Voltage Rating: Off-state voltage must be 800V minimum
Current Rating: On-state RMS current must support 25A operation
On-State Voltage: Maximum Vtm of 1.6V or lower
Gate Trigger Characteristics: Vgt maximum 1.5V and Igt maximum 35mA
Hold Current: Maximum 50mA
Package Compatibility: TO-263 family (D2PAK) surface mount configuration
Temperature Range: -40°C to 125°C operating window
Recovery Type: Standard Recovery classification
Compliance: RoHS3 compliant, MSL Level 1

Two substitute parts meet these criteria: the CS19-08HO1S-TRL (IXYS) and TN2540-800G-TR (STMicroelectronics). Both maintain identical voltage ratings, equivalent thermal operating ranges, and compatible TO-263 package specifications.

Parameter Comparison

Parameter	S8025NTP (Littelfuse)	CS19-08HO1S-TRL (IXYS)	TN2540-800G-TR (STMicroelectronics)	Unit
Voltage - Off State	800	800	800	V
Voltage - Gate Trigger (Vgt) Max	1.5	1.5	1.3	V
Current - Gate Trigger (Igt) Max	35	28	40	mA
Voltage - On State (Vtm) Max	1.6	1.6	1.6	V
Current - On State (It AV) Max	16	13	16	A
Current - On State (It RMS) Max	25	29	25	A
Current - Hold (Ih) Max	50	50	50	mA
Current - Off State Max	20	5	5	µA
Operating Temperature	-40 to 125	-40 to 125	-40 to 125	°C
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	Surface Mount	Surface Mount	-
SCR Type	Standard Recovery	Standard Recovery	Standard Recovery	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	-

Engineering Selection Recommendations

All three parts—S8025NTP, CS19-08HO1S-TRL, and TN2540-800G-TR—maintain active product status and full RoHS3 compliance with MSL Level 1 ratings. Selection between these parts is based on the following factors:

S8025NTP (Littelfuse): Primary choice for applications requiring the specified gate trigger voltage of 1.5V maximum and current of 35mA maximum. Packaging in tube format supports lower-volume procurement.

CS19-08HO1S-TRL (IXYS): Suitable for applications where lower gate trigger current (28mA maximum) is beneficial for gate drive circuit optimization. Offers higher RMS current capability (29A) for thermal margin. Supplied in tape and reel format for automated assembly.

TN2540-800G-TR (STMicroelectronics): Appropriate for designs where lower gate trigger voltage (1.3V maximum) reduces gate drive power requirements. Maintains identical RMS current rating (25A) and on-state voltage (1.6V maximum). Available in cut tape and Digi-Reel format with highest inventory availability (3200 pcs).

All three parts share identical off-state voltage (800V), on-state voltage maximum (1.6V), hold current maximum (50mA), and operating temperature range (-40°C to 125°C), ensuring functional equivalence in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can CS19-08HO1S-TRL replace S8025NTP directly?

A: Yes. Both parts share 800V off-state voltage, 1.6V maximum on-state voltage, 50mA hold current maximum, and -40°C to 125°C operating range. The CS19-08HO1S-TRL offers 29A RMS current versus 25A, providing additional thermal margin. Gate trigger specifications differ slightly (Vgt 1.5V, Igt 28mA for IXYS versus Vgt 1.5V, Igt 35mA for Littelfuse), requiring gate drive circuit verification.

Q: What are the differences between TN2540-800G-TR and S8025NTP?

A: Both parts are rated 800V off-state, 25A RMS on-state current, and 1.6V maximum on-state voltage. The TN2540-800G-TR features lower gate trigger voltage (1.3V maximum versus 1.5V) and higher gate trigger current (40mA maximum versus 35mA). These differences require gate drive circuit compatibility assessment.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the TO-263-3 (D2PAK) package with 2 leads plus tab configuration, ensuring mechanical and electrical pin compatibility for PCB layout.

Q: What packaging formats are available?

A: S8025NTP is supplied in tube format. CS19-08HO1S-TRL is supplied in tape and reel (TR) format. TN2540-800G-TR is supplied in cut tape (CT) and Digi-Reel format. Selection depends on assembly process requirements and order volume.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, MSL Level 1 (unlimited moisture sensitivity), and classified under ECCN EAR99 and HTSUS 8541.30.0080.

Q: Which part should be selected for new designs?

A: Selection depends on gate drive circuit design and supply chain availability. TN2540-800G-TR offers the lowest gate trigger voltage (1.3V) and highest inventory (3200 pcs). CS19-08HO1S-TRL provides the highest RMS current rating (29A). S8025NTP maintains the original specification baseline.

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