FS1J-LTP Equivalent & Substitute Parts

Part Overview

The FS1J-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or alternative sourcing is required for supply chain continuity. The FS1J-LTP has identified equivalent and similar alternatives that maintain electrical compatibility within specified parameter tolerances while potentially offering different packaging formats, recovery characteristics, or manufacturer options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-50°C ~ 150°C	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the FS1J-LTP is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
Package Category: DO-214AC or equivalent SMA footprint

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Within ±0.6 V tolerance
Reverse Recovery Time (trr): Faster recovery acceptable; slower recovery acceptable for non-critical timing applications
Current - Reverse Leakage @ Vr: Up to 10 µA @ 600 V acceptable
Operating Temperature - Junction: Extended ranges acceptable
Capacitance @ Vr, F: Variation acceptable for non-resonant applications

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications with different packaging) and Similar Parts (matching core ratings with acceptable variations in secondary parameters).

Parameter Comparison

Parameter	FS1J-LTP	FS1JE-TP	ES1J	GF1J-E3/67A	NRVA4005T3G	RS1J	US1JHE3_A/H
Manufacturer	Micro Commercial Co	Micro Commercial Co	HY Electronic (Cayman) Limited	Vishay General Semiconductor	onsemi	Taiwan Semiconductor Corporation	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.7 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.3 V @ 1 A	1.7 V @ 1 A
Reverse Recovery Time (trr)	250 ns	250 ns	35 ns	2 µs	Not specified	250 ns	75 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	10 µA @ 600 V	5 µA @ 600 V	10 µA @ 600 V
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214BA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature - Junction	-50°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Active	Obsolete	Active	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Active Status, Identical Electrical Specifications):

RS1J (Taiwan Semiconductor Corporation) is the preferred substitute for the FS1J-LTP. This part maintains identical voltage, current, and recovery time specifications with matching DO-214AC (SMA) package compatibility. RS1J is Active product status with ROHS3 compliance and unlimited MSL rating. The operating temperature range extends to -55°C, providing broader environmental coverage than the primary part.

US1JHE3_A/H (Vishay General Semiconductor - Diodes Division) is an alternative substitute with Active product status and AEC-Q101 automotive qualification. This part maintains the 600 V / 1 A rating and DO-214AC package format. Forward voltage is specified at 1.7 V @ 1 A with faster reverse recovery time of 75 ns. Reverse leakage current is 10 µA @ 600 V, within acceptable tolerance. This part is suitable for applications requiring automotive-grade components.

ES1J (HY Electronic (Cayman) Limited) provides an alternative with Active product status and AEC-Q101 automotive qualification. This part features superior reverse recovery time of 35 ns and extended operating temperature range to -55°C. Forward voltage is 1.7 V @ 1 A. This part is suitable for high-speed switching applications requiring automotive qualification.

Secondary Substitutes (Obsolete or Not For New Designs Status):

FS1JE-TP (Micro Commercial Co) is a parametric equivalent with identical electrical specifications but Obsolete product status. This part should be used only when existing inventory is available and new designs should not incorporate this part number.

NRVA4005T3G (onsemi) carries "Not For New Designs" status and should be avoided for new circuit implementations. This part is retained in the substitute list for legacy system maintenance only.

Package Consideration:

GF1J-E3/67A (Vishay General Semiconductor - Diodes Division) uses DO-214BA package format instead of DO-214AC. While electrically compatible at the 600 V / 1 A rating, the different package footprint requires PCB layout modification. This part features lower forward voltage (1.1 V @ 1 A) and extended operating temperature range (-65°C ~ 175°C) but has slower recovery time (2 µs). This part is suitable only when PCB redesign is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I directly replace FS1J-LTP with RS1J without circuit modification?

A: Yes. RS1J maintains identical voltage (600 V), current (1 A), and recovery time (250 ns) specifications with matching DO-214AC (SMA) package footprint. No circuit modification is required.

Q: What is the difference between FS1JE-TP and FS1J-LTP?

A: FS1JE-TP is a parametric equivalent with identical electrical specifications but different packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). FS1JE-TP carries Obsolete product status and should not be used in new designs.

Q: Can I use GF1J-E3/67A as a direct replacement?

A: GF1J-E3/67A uses DO-214BA package instead of DO-214AC, requiring PCB footprint modification. While electrically compatible at the 600 V / 1 A rating, the different package format prevents direct substitution without layout changes.

Q: What is the significance of reverse recovery time differences?

A: Reverse recovery time (trr) affects switching speed and EMI characteristics. FS1J-LTP specifies 250 ns. Faster alternatives like ES1J (35 ns) or US1JHE3_A/H (75 ns) reduce switching losses in high-frequency applications. Slower alternatives like GF1J-E3/67A (2 µs) are acceptable for standard-speed applications.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant or RoHS compliant. ES1J carries RoHS Compliant status (not specifically ROHS3). All parts meet environmental compliance requirements.

Q: Which substitute part is recommended for automotive applications?

A: Both US1JHE3_A/H and ES1J carry AEC-Q101 automotive qualification. ES1J offers superior reverse recovery time (35 ns) and extended temperature range (-55°C ~ 150°C). US1JHE3_A/H provides automotive qualification with Active product status.

Q: What is the impact of forward voltage variation between substitute parts?

A: Forward voltage ranges from 1.1 V (GF1J-E3/67A, NRVA4005T3G) to 1.7 V (ES1J, US1JHE3_A/H) compared to 1.3 V for FS1J-LTP. Higher forward voltage increases power dissipation; lower forward voltage reduces dissipation. Selection depends on thermal budget and efficiency requirements of the specific application.

Q: Can I use parts with higher reverse leakage current?

A: Yes. FS1J-LTP specifies 5 µA @ 600 V. Substitute parts with 10 µA @ 600 V (NRVA4005T3G, US1JHE3_A/H) are acceptable. Higher leakage current increases standby power consumption but remains within acceptable limits for general-purpose rectifier applications.

Q: What packaging options are available for substitution?

A: All substitute parts except GF1J-E3/67A maintain DO-214AC (SMA) package compatibility with FS1J-LTP. Packaging formats vary: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or unspecified. Verify packaging format matches procurement requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message