S1DB R5G Equivalent & Substitute Parts

Part Overview

The S1DB R5G 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 surface mount DO-214AA (SMB) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within the same package form factor with potential variations in current rating, recovery speed, or forward voltage characteristics.

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
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Capacitance @ Vr, F	12	pF @ 4V, 1MHz
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the S1DB R5G is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Current Rating Compatibility: Parts are grouped by average rectified current (Io). The S1DB R5G operates at 1 A. Substitute parts rated at 1 A provide direct functional equivalence. Parts rated at 2 A or higher are compatible for applications where the 1 A rating is not a limiting factor, as they operate within the same voltage class and package.

Recovery Speed Considerations: The S1DB R5G specifies Standard Recovery (>500ns). Substitute parts with Fast Recovery (≤500ns) characteristics are compatible, as faster recovery represents an enhancement rather than a limitation.

Forward Voltage Variation: Forward voltage specifications vary among manufacturers. The S1DB R5G specifies 1.1 V @ 1 A. Substitute parts with lower forward voltage (0.9 V to 1.0 V) are compatible and may offer improved efficiency.

Temperature Range: The S1DB R5G operates from -55°C to 150°C. Substitute parts with equal or extended temperature ranges are compatible.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
S1DB R5G	Taiwan Semiconductor Corporation	200	1	1.1 @ 1A	Standard >500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Discontinued
S1DB	Taiwan Semiconductor Corporation	200	1	1.1 @ 1A	Standard >500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
S1DBH	Taiwan Semiconductor Corporation	200	1	1.1 @ 1A	Standard >500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
ER1D-LTP	Micro Commercial Co	200	1	0.95 @ 1A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-65 to 175	Active
CSFB203-G	Comchip Technology	200	2	0.92 @ 2A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
CURB203-G	Comchip Technology	200	2	1.0 @ 2A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
ER2D-LTP	Micro Commercial Co	200	2	0.95 @ 2A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-65 to 175	Active
ER3DB-TP	Micro Commercial Co	200	3	0.95 @ 3A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
ES2D	Good-Ark Semiconductor	200	2	0.95 @ 2A	Fast ≤500ns	10 @ 200V	DO-214AA, SMB	-55 to 150	Active
ES2D-13-F	Diodes Incorporated	200	2	0.92 @ 2A	Fast ≤500ns	5 @ 200V	DO-214AA, SMB	-55 to 150	Active
ES2D-E3/52T	Vishay General Semiconductor - Diodes Division	200	2	0.90 @ 2A	Fast ≤500ns	10 @ 200V	DO-214AA, SMB	-55 to 150	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

The S1DB and S1DBH from Taiwan Semiconductor Corporation are parametric equivalents to the S1DB R5G. Both parts maintain identical electrical specifications (200 V, 1 A, 1.1 V forward voltage, standard recovery speed) and the same operating temperature range (-55°C to 150°C). Both are active products with ROHS3 compliance and MSL 1 rating. The S1DBH variant includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

1 A Current Rating Substitutes:

The ER1D-LTP from Micro Commercial Co is a 1 A rated substitute with identical voltage and package specifications. It features fast recovery characteristics (≤500ns) and an extended operating temperature range (-65°C to 175°C), providing enhanced thermal performance. Forward voltage is 0.95 V @ 1 A, representing a 0.15 V improvement over the S1DB R5G.

2 A Current Rating Substitutes:

Parts rated at 2 A average rectified current are compatible for applications where the 1 A specification does not represent a design constraint. These include:

CSFB203-G (Comchip Technology): 0.92 V forward voltage, fast recovery (35 ns), standard temperature range
CURB203-G (Comchip Technology): 1.0 V forward voltage, fast recovery (50 ns), standard temperature range
ER2D-LTP (Micro Commercial Co): 0.95 V forward voltage, fast recovery (35 ns), extended temperature range (-65°C to 175°C)
ES2D (Good-Ark Semiconductor): 0.95 V forward voltage, fast recovery (35 ns), standard temperature range
ES2D-13-F (Diodes Incorporated): 0.92 V forward voltage, fast recovery (25 ns), standard temperature range
ES2D-E3/52T (Vishay General Semiconductor): 0.90 V forward voltage, fast recovery (30 ns), standard temperature range

3 A Current Rating Substitute:

The ER3DB-TP from Micro Commercial Co is rated at 3 A with 200 V reverse voltage and DO-214AA package. It features fast recovery (35 ns) and operates across the standard temperature range (-55°C to 150°C). This part is suitable for applications requiring higher current capacity within the same voltage and package class.

Compliance and Availability:

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements. All substitute parts are currently active products with established inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the S1DB be used as a direct replacement for the S1DB R5G?

A: Yes. The S1DB is a parametric equivalent with identical electrical specifications (200 V, 1 A, 1.1 V forward voltage) and the same operating temperature range. The primary difference is product status: S1DB R5G is discontinued, while S1DB is active. Both are manufactured by Taiwan Semiconductor Corporation and packaged in DO-214AA (SMB).

Q: What is the difference between the S1DB and S1DBH?

A: Both parts are parametric equivalents with identical electrical specifications. The S1DBH includes AEC-Q101 automotive qualification and is designated as an automotive-grade component. Selection between these parts depends on whether automotive qualification is required for the application.

Q: Can a 2 A rated diode replace a 1 A rated diode?

A: Yes, within the constraints of the application. A 2 A rated diode can operate at 1 A without exceeding its current rating. However, the application circuit must be designed to operate at or below 1 A. The 2 A rating provides additional current capacity margin but does not change the voltage or package compatibility. Forward voltage and recovery speed characteristics may differ between 1 A and 2 A parts.

Q: What does "fast recovery" mean compared to "standard recovery"?

A: Recovery speed refers to the reverse recovery time (trr), the time required for a diode to stop conducting when reverse bias is applied. Standard recovery (>500ns) is slower, while fast recovery (≤500ns) is faster. Fast recovery diodes are suitable for higher frequency applications and switching circuits. For low-frequency rectification, both types are compatible, though fast recovery may offer improved efficiency.

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

A: Yes. All parts listed in this reference maintain the DO-214AA (SMB) surface mount package. Packaging variations exist only in tape and reel configurations (Tape & Reel, Cut Tape, or Digi-Reel), which do not affect component functionality or PCB mounting.

Q: What is the significance of the operating temperature range difference between parts?

A: The S1DB R5G operates from -55°C to 150°C. Some substitutes, such as ER1D-LTP and ER2D-LTP, extend this range to -65°C to 175°C. An extended temperature range provides additional margin for applications operating in extreme thermal environments. If the application operates within the standard range (-55°C to 150°C), both standard and extended range parts are compatible.

Q: Does forward voltage variation affect circuit performance?

A: Forward voltage differences of 0.1 V to 0.2 V between parts may affect circuit performance in precision applications. The S1DB R5G specifies 1.1 V @ 1 A, while substitutes range from 0.90 V to 0.95 V @ 1 A or 2 A. In rectification and power conversion applications, lower forward voltage reduces power dissipation and improves efficiency. In signal detection or precision circuits, forward voltage consistency may be critical; verify compatibility with circuit design requirements.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the component meets European Union environmental standards restricting the use of hazardous materials including lead, cadmium, mercury, and certain flame retardants. All parts listed in this reference are ROHS3 compliant, ensuring compatibility with modern manufacturing and environmental regulations.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: Moisture Sensitivity Level (MSL) 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly. MSL 1 components are the least restrictive and simplify manufacturing logistics compared to higher MSL ratings.

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