S1D-F Equivalent & Substitute Parts Reference

Part Overview

The S1D-F is a general-purpose rectifier diode manufactured by SMC Diode Solutions, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount SMA (DO-214AC) package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter tolerances for the diode rectifier category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 175	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the S1D-F is determined by equivalence in the following critical parameters: reverse voltage rating (200 V), average rectified current (1 A), forward voltage drop (1.1 V maximum at 1 A), package type (DO-214AC/SMA), and mounting configuration (surface mount). Parts are grouped into two categories:

Direct Equivalent (Identical Specifications): Parts maintaining all electrical parameters within the specified tolerances, differing only in packaging format (tape and reel versus cut tape) or manufacturer identity while preserving functional interchangeability.

Functional Substitute (Parameter Variance Acceptable): Parts with minor deviations in secondary parameters such as reverse recovery time, reverse leakage current, or capacitance, provided the primary ratings (voltage, current, forward drop, package, and temperature range) remain compatible with the original design requirements.

Parameter Comparison

Parameter	S1D-F (Main)	GS1D	S1D (YAGEO)	US1D-TP
Manufacturer	SMC Diode Solutions	SMC Diode Solutions	YAGEO	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	1 A	1 A	—	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V	1 V @ 1 A
Reverse Recovery Time (trr)	2.5 µs	2.5 µs	—	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	—	10 µA @ 200 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	—	20 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C
Technology	Standard	Standard	—	Standard
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

GS1D (SMC Diode Solutions): This part is the direct equivalent to S1D-F with identical electrical specifications and package configuration. GS1D is currently in active production status with ROHS3 compliance and significantly higher inventory availability (49,400 units). Selection of GS1D is appropriate for direct replacement in all applications previously specified for S1D-F. The primary distinction is packaging format (tape and reel versus unspecified for S1D-F).

S1D (YAGEO): This parametric equivalent maintains the 200 V reverse voltage rating, 1.1 V forward voltage drop, and DO-214AC package configuration. YAGEO S1D is active and ROHS3 compliant. Detailed electrical parameters for reverse recovery time and leakage current are not provided in the specification data; however, the core functional parameters align with S1D-F requirements. This part is suitable for applications where YAGEO component qualification is acceptable.

US1D-TP (Micro Commercial Co): This part functions as a substitute with compatible primary ratings (200 V, 1 A, DO-214AC package) but exhibits faster recovery characteristics (50 ns versus 2.5 µs) and slightly elevated reverse leakage current (10 µA versus 5 µA). US1D-TP is active and ROHS3 compliant. The faster recovery time may provide performance benefits in high-frequency switching applications but requires circuit validation to confirm compatibility with existing design parameters. Forward voltage drop is reduced to 1 V, which may affect power dissipation calculations.

Frequently Asked Questions (FAQ)

Q: Can GS1D be used as a direct replacement for S1D-F?

A: Yes. GS1D maintains identical electrical specifications (200 V reverse voltage, 1 A current, 1.1 V forward drop, 2.5 µs recovery time) and package configuration (DO-214AC/SMA surface mount). The only difference is packaging format (tape and reel). GS1D is currently in active production.

Q: What is the primary reason S1D-F is obsolete?

A: S1D-F is classified as obsolete by the manufacturer. GS1D, the active equivalent from the same manufacturer, should be used for new designs and ongoing procurement.

Q: Is US1D-TP compatible with S1D-F in all applications?

A: US1D-TP is functionally compatible for the primary application parameters (200 V, 1 A, DO-214AC package). However, US1D-TP exhibits significantly faster reverse recovery time (50 ns versus 2.5 µs) and slightly higher reverse leakage current (10 µA versus 5 µA). These differences may affect circuit behavior in specific applications. Circuit validation is required to confirm suitability for the intended application.

Q: What does "parametric equivalent" mean for the YAGEO S1D?

A: Parametric equivalent indicates that the part meets the primary functional requirements (200 V rating, 1.1 V forward drop, DO-214AC package) but detailed specifications for secondary parameters such as reverse recovery time and leakage current are not provided in the available data. The part is suitable for general-purpose rectification applications where these secondary parameters are not critical design constraints.

Q: Are all substitute parts RoHS compliant?

A: GS1D, S1D (YAGEO), and US1D-TP are all ROHS3 compliant. S1D-F RoHS status is not specified in the provided data.

Q: What is the difference between tape and reel packaging and cut tape packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Tape and reel (TR) packaging provides components on continuous tape wound on reels for high-volume production. Cut tape (CT) packaging provides components on tape segments. Both formats are compatible with standard pick-and-place equipment. Selection depends on production volume and assembly line configuration.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All substitute parts listed maintain compatible electrical specifications and package configurations. However, component qualification and procurement policies should be reviewed to confirm acceptance of multiple manufacturers within a single design.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure precautions. All listed parts have MSL 1 rating, requiring no special moisture control during storage or handling.

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