Equivalent & Substitute Parts for RS1G-13

Part Overview

The RS1G-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The RS1G-13 features fast recovery characteristics with a reverse recovery time of 150 ns and operates across a junction temperature range of -65°C to 150°C. Due to its obsolete status, active alternatives with identical or superior electrical characteristics are required for new production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	µA
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Standard	-
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-

Substitute Part Grouping Explanation

Substitution of the RS1G-13 is determined by strict equivalence across the following critical parameters: reverse voltage rating (400 V minimum), average rectified current (1 A), forward voltage drop (1.3 V maximum at 1 A), reverse recovery time classification (fast recovery ≤ 500 ns), and surface mount package compatibility. Substitute parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalents maintain identical electrical specifications and package type (DO-214AC, SMA), differing only in product status or packaging format (Cut Tape vs. Tape & Reel). These parts are direct functional replacements.

Direct Manufacturer Alternatives are from the same manufacturer (Diodes Incorporated) with identical electrical performance but different package types (SMB, SMA variants) or voltage ratings (600 V). These accommodate different board layouts or provide voltage margin.

Cross-Manufacturer Equivalents from Vishay, onsemi, Rohm Semiconductor, and Comchip Technology meet the core electrical requirements (400 V, 1 A, fast recovery) while offering different package options (DO-214BA, PMDS) or enhanced specifications (lower capacitance, automotive qualification).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Package	Product Status	RoHS Status
RS1G-13	Diodes Incorporated	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214AC, SMA	Obsolete	Non-compliant
RS1G-13-F	Diodes Incorporated	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214AC, SMA	Active	ROHS3 Compliant
US1G-13-F	Diodes Incorporated	400 V	1 A	1.3 V @ 1 A	50 ns	DO-214AC, SMA	Active	ROHS3 Compliant
RS1GB-13-F	Diodes Incorporated	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214AA, SMB	Active	ROHS3 Compliant
RS1J-13-F	Diodes Incorporated	600 V	1 A	1.3 V @ 1 A	250 ns	DO-214AC, SMA	Active	ROHS3 Compliant
RGF1G-E3/67A	Vishay General Semiconductor	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214BA	Active	ROHS3 Compliant
RGF1G	onsemi	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
RGF1G-E3/5CA	Vishay General Semiconductor	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214BA	Active	ROHS3 Compliant
1SR156-400TE25	Rohm Semiconductor	400 V	1 A	1.3 V @ 800 mA	400 ns	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
ACGRA4004-HF	Comchip Technology	400 V	1 A	1.1 V @ 1 A	2.5 µs	DO-214AC, SMA	Active	ROHS3 Compliant
CFRA104-G	Comchip Technology	400 V	1 A	1.3 V @ 1 A	150 ns	DO-214AC, SMA	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: RS1G-13-F

The RS1G-13-F is the direct parametric equivalent to the obsolete RS1G-13, manufactured by Diodes Incorporated. It maintains identical electrical specifications (400 V, 1 A, 150 ns reverse recovery time) and package type (DO-214AC, SMA). The part is currently in active production status with ROHS3 compliance, making it the optimal choice for direct replacement in existing designs. Inventory availability is substantial at 115,034 pieces.

Secondary Recommendation: US1G-13-F

The US1G-13-F offers superior reverse recovery performance (50 ns versus 150 ns) while maintaining all other critical parameters. This part is suitable for applications requiring faster switching characteristics. It is available in the same SMA package and carries active product status with ROHS3 compliance. Inventory is robust at 155,300 pieces.

Alternative for Package Flexibility: RS1GB-13-F

For designs requiring a larger surface mount package, the RS1GB-13-F provides identical electrical performance in the SMB package (DO-214AA). This part is active and ROHS3 compliant, with 1,843 pieces in stock. Package selection depends on board layout constraints and thermal management requirements.

Higher Voltage Option: RS1J-13-F

The RS1J-13-F is rated for 600 V reverse voltage, providing additional voltage margin for applications operating near the 400 V limit. It maintains 1 A current rating and SMA package compatibility. The reverse recovery time increases to 250 ns. This part is active and ROHS3 compliant with 151,735 pieces available.

Cross-Manufacturer Options: RGF1G-E3/67A and RGF1G-E3/5CA

Vishay's SUPERECTIFIER® series parts (RGF1G-E3/67A and RGF1G-E3/5CA) meet all electrical requirements in the DO-214BA package. Both are active products with ROHS3 compliance. The RGF1G-E3/67A has 3,100 pieces in stock, while the RGF1G-E3/5CA has 15,300 pieces. These parts offer lower capacitance (8.5 pF versus 15 pF) and extended junction temperature range (-65°C to 175°C).

Automotive-Qualified Option: ACGRA4004-HF

The ACGRA4004-HF from Comchip Technology is AEC-Q101 qualified for automotive applications. It features a lower forward voltage drop (1.1 V at 1 A) and is available in the SMA package. However, it uses standard recovery characteristics (2.5 µs) rather than fast recovery. This part is active with 19,201 pieces in stock and ROHS3 compliance.

General-Purpose Cross-Manufacturer: CFRA104-G

The CFRA104-G from Comchip Technology provides fast recovery performance (150 ns) matching the original RS1G-13 specification. It is rated for 400 V, 1 A in the SMA package and is active with ROHS3 compliance. Inventory is limited at 1,045 pieces.

Not Recommended for New Designs: 1SR156-400TE25 and RGF1G

The 1SR156-400TE25 (Rohm Semiconductor) and RGF1G (onsemi) are classified as "Not For New Designs." While they meet the core electrical requirements, their product status restricts their use in new development. These parts may be considered only for legacy system maintenance where no alternatives exist.

Frequently Asked Questions (FAQ)

Q: Can RS1G-13-F be used as a direct replacement for RS1G-13?

A: Yes. The RS1G-13-F is a parametric equivalent with identical electrical specifications (400 V, 1 A, 150 ns reverse recovery time) and the same SMA package. The primary difference is product status: RS1G-13-F is active and ROHS3 compliant, while RS1G-13 is obsolete and non-compliant. No circuit modifications are required.

Q: What is the difference between SMA and SMB packages?

A: SMA (DO-214AC) and SMB (DO-214AA) are both surface mount packages but differ in physical dimensions. SMB is larger and typically used for higher power dissipation applications. The RS1GB-13-F in SMB package is electrically identical to RS1G-13-F in SMA but requires different PCB footprints. Verify board layout compatibility before selecting.

Q: Why does US1G-13-F have a shorter reverse recovery time?

A: The US1G-13-F is designed with faster switching characteristics (50 ns versus 150 ns). This reduces switching losses and improves efficiency in high-frequency applications. It is suitable for drop-in replacement if the application benefits from faster recovery, with no negative effects on slower-switching designs.

Q: Is ACGRA4004-HF suitable for non-automotive applications?

A: Yes. ACGRA4004-HF is AEC-Q101 qualified, meaning it exceeds automotive standards and is suitable for any application. However, its standard recovery time (2.5 µs) is significantly slower than the fast recovery specification of RS1G-13 (150 ns). Use only if application switching frequency permits standard recovery performance.

Q: What does "Not For New Designs" mean for 1SR156-400TE25 and RGF1G?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends against using these parts in new product development. They may be used for legacy system maintenance or repair where no alternatives are available. For new designs, select active-status alternatives such as RS1G-13-F or CFRA104-G.

Q: Can RS1J-13-F (600 V) replace RS1G-13 (400 V) in all applications?

A: Yes, with design considerations. The 600 V rating provides additional voltage margin and is backward compatible with 400 V applications. However, the reverse recovery time increases to 250 ns, which may affect switching performance in high-frequency circuits. Verify that the longer recovery time does not impact system performance before substitution.

Q: What is the significance of RoHS3 compliance?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original RS1G-13 is non-compliant. All recommended substitutes are ROHS3 compliant, making them suitable for modern manufacturing and environmental regulations.

Q: How do capacitance differences affect circuit performance?

A: Capacitance values (ranging from 2.5 pF to 20 pF at 4 V, 1 MHz) affect high-frequency behavior and switching transients. Lower capacitance (RGF1G series at 8.5 pF) reduces parasitic effects in high-frequency applications. Higher capacitance (US1G-13-F at 20 pF) has minimal impact on standard rectification circuits. Select based on application frequency requirements.

Q: Are all substitute parts available in the same packaging format?

A: No. While most substitutes are available in SMA (DO-214AC) or SMB (DO-214AA) packages, Vishay parts use DO-214BA. Packaging format affects PCB footprint and thermal characteristics. Verify PCB design compatibility before selecting a substitute with a different package type.

Q: What is the operating temperature range consideration?

A: The original RS1G-13 operates from -65°C to 150°C. Most substitutes maintain this range, but Vishay parts (RGF1G series) extend to 175°C. ACGRA4004-HF operates from -55°C to 150°C. Verify application temperature requirements; extended range parts provide additional margin for harsh environments.

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