S1DHR3G Equivalent & Substitute Parts

Part Overview

The S1DHR3G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design and procurement requirements. The S1DHR3G meets automotive grade specifications with AEC-Q101 qualification and operates across a junction temperature range of -55°C to 175°C.

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	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	1	µA @ 200 V
Capacitance @ Vr, F	12	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 175	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S1DHR3G is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 200 V to ensure equivalent circuit protection and reliability.

Current Rating: Substitute parts must support a minimum average rectified current of 1 A. Parts rated for higher current (such as 2 A) are functionally compatible but represent over-specification.

Package Type: The DO-214AC (SMA) surface mount package is the primary form factor. Substitutes in alternative packages (DO-214AA/SMB) require PCB layout modification but maintain electrical equivalence.

Forward Voltage: Forward voltage drop at rated current affects power dissipation and circuit performance. Variations between 920 mV and 1.3 V at 1 A are within acceptable engineering tolerance for general-purpose rectification.

Recovery Characteristics: The S1DHR3G exhibits standard recovery behavior (>500 ns). Substitutes with faster recovery (≤500 ns) provide improved switching performance without compromising compatibility.

Temperature Range: The S1DHR3G operates from -55°C to 175°C. Substitutes with reduced upper temperature limits (-55°C to 150°C) are acceptable for applications not requiring the full automotive temperature range.

Compliance: All listed substitutes maintain ROHS3 compliance, MSL 1 rating, and EAR99 export classification consistent with the original part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
S1DHR3G	Taiwan Semiconductor Corporation	200	1	1.1 @ 1 A	1.5 µs	1 @ 200 V	DO-214AC (SMA)	-55 to 175	Discontinued
S1DH	Taiwan Semiconductor Corporation	200	1	1.1 @ 1 A	1.5 µs	1 @ 200 V	DO-214AC (SMA)	-55 to 175	Active
S1D	YAGEO	200	1	1.1 @ 1 A	—	DO-214AC (SMA)	—	Active
S1D-13-F	Diodes Incorporated	200	1	1.1 @ 1 A	3 µs	5 @ 200 V	DO-214AC (SMA)	-65 to 150	Active
S1DB-13-F	Diodes Incorporated	200	1	1.1 @ 1 A	3 µs	5 @ 200 V	DO-214AA (SMB)	-65 to 150	Active
RS1D-13-F	Diodes Incorporated	200	1	1.3 @ 1 A	150 ns	5 @ 200 V	DO-214AC (SMA)	-65 to 150	Active
RS1DB-13-F	Diodes Incorporated	200	1	1.3 @ 1 A	150 ns	5 @ 200 V	DO-214AA (SMB)	-65 to 150	Active
US1D-13-F	Diodes Incorporated	200	1	1.0 @ 1 A	50 ns	5 @ 200 V	DO-214AC (SMA)	-65 to 150	Active
ES1D-13-F	Diodes Incorporated	200	1	920 mV @ 1 A	25 ns	5 @ 200 V	DO-214AC (SMA)	-55 to 150	Active
CGRA4003-G	Comchip Technology	200	1	1.1 @ 1 A	≤500 ns	5 @ 200 V	DO-214AC (SMA)	-55 to 150	Active
ES2D-LTP	Micro Commercial Co	200	2	950 mV @ 2 A	35 ns	5 @ 200 V	DO-214AC (SMA)	-65 to 175	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

S1DH (Taiwan Semiconductor Corporation) is the parametric equivalent to S1DHR3G. This part maintains identical electrical specifications including 200 V reverse voltage, 1 A current rating, 1.1 V forward voltage, and 1.5 µs reverse recovery time. S1DH is currently active in production with 15,738 units in stock. The part is supplied in Tape & Reel packaging and meets all automotive and compliance requirements of the original part. This is the primary recommended substitute for direct circuit replacement.

Form Factor Equivalent (SMA Package):

S1D-13-F (Diodes Incorporated) provides electrical equivalence in the DO-214AC (SMA) package with 300,300 units available. This part maintains the 200 V / 1 A rating and 1.1 V forward voltage specification. Operating temperature range is -65°C to 150°C, which covers standard industrial and automotive applications below 175°C. Reverse recovery time is 3 µs, representing standard recovery performance. This part is suitable for applications not requiring the full -55°C to 175°C automotive temperature range.

Enhanced Performance Alternatives (Faster Recovery):

US1D-13-F (Diodes Incorporated) offers improved switching performance with 50 ns reverse recovery time while maintaining 200 V / 1 A ratings and 1.0 V forward voltage. This part is suitable for applications requiring reduced switching losses. ES1D-13-F (Diodes Incorporated) provides the fastest recovery at 25 ns with the lowest forward voltage (920 mV), optimizing for high-frequency switching applications. Both parts operate to 150°C maximum junction temperature.

Higher Current Rating (Over-Specification):

ES2D-LTP (Micro Commercial Co) is rated for 2 A average rectified current at 200 V reverse voltage. This part provides design margin for applications with potential current transients or future design modifications. Operating temperature range extends to 175°C, matching the original part specification. This substitution is appropriate when circuit design permits the larger package footprint and enhanced current capability.

Package Variant (SMB Form Factor):

S1DB-13-F and RS1DB-13-F (Diodes Incorporated) provide electrical equivalence in the DO-214AA (SMB) package. These parts require PCB layout modification due to different pad geometry but maintain identical electrical performance to their SMA counterparts. SMB packages offer improved thermal dissipation for applications with elevated ambient temperatures or continuous high current operation.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance, MSL 1 moisture sensitivity rating, and EAR99 export classification. Substitutes from Diodes Incorporated, YAGEO, and Comchip Technology are established suppliers with active production status and substantial inventory availability.

Frequently Asked Questions (FAQ)

Q: Can S1DH be used as a direct replacement for S1DHR3G?

A: Yes. S1DH is the parametric equivalent with identical electrical specifications (200 V, 1 A, 1.1 V forward voltage, 1.5 µs recovery time) and automotive grade qualification. The primary difference is packaging format (Tape & Reel versus cut tape). Both parts meet AEC-Q101 requirements and operate across -55°C to 175°C.

Q: What is the difference between standard recovery and fast recovery diodes in this product category?

A: Standard recovery diodes (S1DHR3G, S1DH, S1D-13-F, CGRA4003-G) exhibit reverse recovery times exceeding 500 ns or in the microsecond range. Fast recovery diodes (US1D-13-F at 50 ns, ES1D-13-F at 25 ns) reduce switching losses in high-frequency applications. For general-purpose rectification at line frequency or low switching rates, standard recovery performance is sufficient.

Q: Can I substitute a 2 A rated diode (ES2D-LTP) for the 1 A S1DHR3G?

A: Yes, for circuit functionality. The ES2D-LTP maintains 200 V reverse voltage rating and provides higher current capacity. This substitution introduces design margin but does not compromise circuit operation. Verify that PCB layout and thermal management accommodate the different package geometry if required.

Q: What are the implications of using a substitute with lower maximum junction temperature (150°C versus 175°C)?

A: Substitutes with 150°C maximum junction temperature are suitable for applications where the diode junction temperature remains below 150°C under worst-case operating conditions. For automotive applications requiring the full -55°C to 175°C range, verify that thermal design ensures junction temperature does not exceed 150°C. S1DH and CGRA4003-G maintain the 175°C specification.

Q: Are SMB package diodes (S1DB-13-F, RS1DB-13-F) electrically equivalent to SMA package parts?

A: Yes, electrically equivalent. SMB and SMA packages differ only in physical dimensions and pad layout. SMB packages provide larger surface area for improved thermal dissipation. PCB redesign is required to accommodate the different footprint. Electrical performance and current ratings remain identical between package variants of the same part family.

Q: Which substitute offers the lowest forward voltage drop?

A: ES1D-13-F exhibits the lowest forward voltage at 920 mV at 1 A, compared to 1.1 V for the original S1DHR3G. This 180 mV reduction decreases power dissipation and heat generation. US1D-13-F provides 1.0 V forward voltage as an intermediate option. Lower forward voltage is beneficial in high-current or thermally constrained applications.

Q: What inventory considerations apply to these substitutes?

A: S1DH offers the highest inventory alignment with 15,738 units in stock. S1D-13-F and US1D-13-F provide substantial availability (300,300 and 155,200 units respectively). CGRA4003-G and RS1DB-13-F have lower inventory (929 and 1,480 units). For high-volume procurement, S1DH or S1D-13-F are preferred for supply chain reliability.

Q: Do all substitutes meet automotive qualification requirements?

A: S1DHR3G and S1DH carry explicit AEC-Q101 automotive qualification. Other substitutes from Diodes Incorporated, YAGEO, and Comchip Technology are produced to automotive-grade standards and meet ROHS3 compliance. Verify specific AEC-Q101 certification requirements with the component supplier for mission-critical automotive applications.

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