SJ6020RTP Equivalent & Substitute Parts

Part Overview

The SJ6020RTP is an SCR (Silicon Controlled Rectifier) rated for 600V off-state voltage with 20A RMS on-state current capacity. Manufactured by Littelfuse Inc., this thyristor operates in the standard recovery category and is housed in a TO-220AB through-hole package. The device is Active status and ROHS3 compliant, making it suitable for industrial switching and power control applications requiring reliable gate-triggered switching characteristics.

Substitute parts become necessary when addressing inventory constraints, lead time requirements, or application-specific current capacity needs while maintaining electrical and mechanical compatibility within the SJ series platform.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It (RMS))	20	A
Voltage - Gate Trigger (Vgt) (Max)	1.5	V
Current - Gate Trigger (Igt) (Max)	35	mA
Voltage - On State (Vtm) (Max)	1.6	V
Current - Hold (Ih) (Max)	75	mA
Operating Temperature Range	-40 to 150	°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole
SCR Type	Standard Recovery

Substitute Part Grouping Explanation

The SJ6025RTP qualifies as a parametric equivalent to the SJ6020RTP based on the following substitution criteria:

Matching Parameters (Substitution Basis):

Voltage - Off State: 600V (identical)
Voltage - Gate Trigger (Vgt) (Max): 1.5V (identical)
Current - Gate Trigger (Igt) (Max): 35mA (identical)
Voltage - On State (Vtm) (Max): 1.6V (identical)
Current - Hold (Ih) (Max): 75mA (identical)
Operating Temperature Range: -40°C to 150°C (identical)
Package / Case: TO-220-3 (identical)
Mounting Type: Through Hole (identical)
SCR Type: Standard Recovery (identical)
RoHS Status: ROHS3 Compliant (identical)

Differing Parameter (Higher Capacity):

Current - On State (It (RMS)): 25A (vs. 20A in SJ6020RTP)

The SJ6025RTP maintains all critical gate-triggering, thermal, and mechanical specifications while providing increased on-state current capacity. This relationship permits direct substitution in applications where the 20A rating is not a limiting constraint.

Parameter Comparison

Parameter	SJ6020RTP	SJ6025RTP	Unit
Voltage - Off State	600	600	V
Voltage - Gate Trigger (Vgt) (Max)	1.5	1.5	V
Current - Gate Trigger (Igt) (Max)	35	35	mA
Voltage - On State (Vtm) (Max)	1.6	1.6	V
Current - On State (It (AV)) (Max)	12.8	16	A
Current - On State (It (RMS)) (Max)	20	25	A
Current - Hold (Ih) (Max)	75	75	mA
Current - Off State (Max)	10	10	µA
Operating Temperature Range	-40 to 150	-40 to 150	°C (TJ)
Package / Case	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole
SCR Type	Standard Recovery	Standard Recovery
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both SJ6020RTP and SJ6025RTP maintain Active product status with ROHS3 compliance and identical regulatory classifications (ECCN: EAR99; HTSUS: 8541.30.0080). Selection between these parts depends on application current requirements:

SJ6020RTP: Select when circuit design specifies maximum 20A RMS on-state current and inventory availability is confirmed.
SJ6025RTP: Select when application current demand approaches or exceeds 20A RMS, or when SJ6020RTP inventory is unavailable. The higher current rating (25A RMS) provides operational margin without altering gate-trigger characteristics or thermal behavior.

Both devices support identical operating temperature ranges (-40°C to 150°C junction temperature) and maintain equivalent gate-control specifications, ensuring circuit behavior consistency across substitution.

Frequently Asked Questions (FAQ)

Q: Can SJ6025RTP replace SJ6020RTP in any application?

A: SJ6025RTP is electrically compatible with SJ6020RTP in applications where the circuit current demand does not exceed 20A RMS. The higher current rating of SJ6025RTP does not degrade performance in lower-current circuits. Verify that thermal management and PCB layout accommodate the substitute part if current approaches the 25A rating.

Q: Are gate-trigger characteristics identical between these parts?

A: Yes. Both parts specify identical maximum gate trigger voltage (1.5V) and gate trigger current (35mA), ensuring equivalent gate-drive circuit requirements and switching behavior.

Q: Do these parts require different PCB layouts or thermal management?

A: Both parts use identical TO-220-3 packaging and through-hole mounting. PCB footprints are interchangeable. Thermal management design should account for the actual operating current; if substituting SJ6025RTP in a 20A application, existing thermal design remains valid.

Q: What is the difference in non-repetitive surge current between these parts?

A: SJ6020RTP specifies 225A (50Hz) and 300A (60Hz) surge current. SJ6025RTP specifies 300A (50Hz) and 350A (60Hz) surge current. Both ratings exceed typical circuit protection thresholds and do not affect normal operating selection.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Regulatory classifications (ECCN, HTSUS) are identical, permitting direct substitution from a compliance perspective.

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