S1DB-13 Equivalent & Substitute Parts

Part Overview

The S1DB-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 1 A average rectified current in a Surface Mount SMB (DO-214AA) package. This component is classified as discontinued at DiGi Electronics, creating a requirement to identify equivalent and substitute parts for ongoing design and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified parameters suitable for the same application circuit topology.

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)	3	µs
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the S1DB-13 is determined by the following critical parameters:

Voltage Rating (Vr): All substitute parts must maintain a minimum DC reverse voltage rating of 200 V to ensure circuit protection and reliability under specified operating conditions.

Package and Mounting: All substitute parts must use the DO-214AA (SMB) Surface Mount package to ensure mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Current Rating (Io): Substitute parts may exceed the 1 A specification, as higher current ratings provide design margin and are backward-compatible in circuits designed for lower current operation.

Forward Voltage (Vf): Substitute parts with lower forward voltage reduce power dissipation and improve circuit efficiency. Variations in forward voltage do not prevent functional substitution when the diode operates within the specified current range.

Recovery Characteristics: Both standard recovery (>500 ns) and fast recovery (≤500 ns) diodes are acceptable substitutes. Fast recovery diodes provide improved switching performance in high-frequency applications.

Temperature Range: Substitute parts with extended maximum junction temperature ratings provide additional thermal margin and are functionally compatible.

Compliance Status: Active product status and RoHS3 compliance are preferred for new designs and long-term supply chain stability.

Parameter Comparison

Parameter	S1DB-13	S1DB-13-F	ER1D-LTP	S1D	STTH1R02U	STTH2R02U	STTH4R02U	STTH4R02UY
Manufacturer	Diodes Inc.	Diodes Inc.	Micro Commercial Co	YAGEO	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	1 A	1 A	1 A	—	1.5 A	2 A	4 A	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	950 mV @ 1 A	—	1 V @ 1.5 A	1 V @ 2 A	1.05 V @ 4 A	1.05 V @ 4 A
Reverse Recovery Time (trr)	3 µs	3 µs	35 ns	—	30 ns	30 ns	30 ns	30 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	—	3 µA @ 200 V	3 µA @ 200 V	3 µA @ 200 V	3 µA @ 200 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AC	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction (Max)	150°C	150°C	175°C	—	175°C	175°C	175°C	175°C
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Parametric Match):

S1DB-13-F is the direct parametric equivalent to S1DB-13, manufactured by Diodes Incorporated. This part maintains identical electrical specifications including 200 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, and 3 µs reverse recovery time. The primary distinction is packaging format: S1DB-13-F is supplied in Tape & Reel (TR) configuration versus the original part's unspecified packaging. S1DB-13-F holds Active product status and ROHS3 compliance, providing supply chain continuity and regulatory alignment for new production.

Functional Substitutes (Same Voltage and Package, Higher Current Rating):

STTH1R02U, STTH2R02U, STTH4R02U, and STTH4R02UY are manufactured by STMicroelectronics and provide 200 V reverse voltage in DO-214AA SMB packages with current ratings of 1.5 A, 2 A, 4 A, and 4 A respectively. These parts feature fast recovery characteristics (30 ns trr) compared to the standard recovery of the S1DB-13 (3 µs trr), resulting in reduced reverse recovery losses and improved high-frequency performance. All STMicroelectronics variants maintain ROHS3 compliance and Active product status. The higher current ratings enable use in applications requiring design margin or future current expansion without package or footprint changes.

Alternative Equivalent (Different Recovery Characteristic):

ER1D-LTP, manufactured by Micro Commercial Co, provides 200 V reverse voltage and 1 A average rectified current in DO-214AA SMB package. This part exhibits fast recovery characteristics (35 ns trr) and lower forward voltage (950 mV @ 1 A) compared to S1DB-13, resulting in improved efficiency. ER1D-LTP maintains ROHS3 compliance and Active product status with extended maximum junction temperature (175°C).

Base Product Alternative:

S1D, manufactured by YAGEO, is listed as a base product alternative. Detailed electrical parameters are not fully specified in the provided data. This part is supplied in Cut Tape (CT) & Digi-Reel® packaging and maintains ROHS3 compliance and Active product status.

Frequently Asked Questions (FAQ)

Q: Can S1DB-13-F be used as a direct replacement for S1DB-13?

A: Yes. S1DB-13-F is a parametric equivalent manufactured by Diodes Incorporated with identical electrical specifications: 200 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, and 3 µs reverse recovery time. The difference is packaging format (Tape & Reel versus unspecified). Both parts use the DO-214AA SMB package for surface mount assembly. S1DB-13-F is Active and ROHS3 compliant, making it suitable for new designs and production.

Q: What is the difference between standard recovery and fast recovery diodes?

A: Standard recovery diodes exhibit reverse recovery times greater than 500 ns, while fast recovery diodes exhibit reverse recovery times of 500 ns or less. The S1DB-13 has a 3 µs (3000 ns) reverse recovery time, classified as standard recovery. Fast recovery substitutes such as ER1D-LTP (35 ns), STTH1R02U (30 ns), STTH2R02U (30 ns), and STTH4R02U (30 ns) reduce switching losses and are suitable for higher-frequency applications. Fast recovery diodes are functionally compatible in circuits designed for standard recovery diodes.

Q: Can I use a higher current-rated diode such as STTH2R02U (2 A) in place of S1DB-13 (1 A)?

A: Yes. Higher current-rated diodes are backward-compatible substitutes when the reverse voltage rating and package remain unchanged. STTH2R02U maintains the 200 V reverse voltage and DO-214AA SMB package, providing additional current capacity and design margin. The circuit will operate within the diode's specifications, as the actual current draw is determined by the circuit design, not the diode rating.

Q: What is the significance of RoHS compliance for the S1DB-13 substitutes?

A: The original S1DB-13 is RoHS non-compliant. All recommended substitutes (S1DB-13-F, ER1D-LTP, S1D, STTH series) are ROHS3 compliant, meeting regulatory requirements for lead-free manufacturing and hazardous substance restrictions. ROHS3 compliance is mandatory for products sold into European markets and increasingly required by global OEMs. Use of ROHS3-compliant substitutes ensures regulatory alignment and supply chain compatibility.

Q: Does forward voltage variation affect circuit performance?

A: Forward voltage affects power dissipation and voltage drop across the diode during conduction. S1DB-13 specifies 1.1 V forward voltage at 1 A. Substitutes with lower forward voltage (ER1D-LTP at 950 mV, STTH series at 1.0–1.05 V) reduce power dissipation and improve circuit efficiency. Substitutes with equal or slightly higher forward voltage maintain equivalent performance. Forward voltage variation does not prevent functional substitution when the diode operates within its specified current range and the circuit design accommodates the voltage drop.

Q: Are all substitute parts available in the same SMB package?

A: All recommended substitutes except S1D use the DO-214AA SMB package, ensuring mechanical and thermal compatibility with existing PCB layouts. S1D is supplied in DO-214AC package, which has different mechanical dimensions and is not a direct package substitute. For applications requiring identical footprint compatibility, select substitutes from the DO-214AA SMB group: S1DB-13-F, ER1D-LTP, STTH1R02U, STTH2R02U, STTH4R02U, and STTH4R02UY.

Q: What is the operating temperature range difference between S1DB-13 and its substitutes?

A: S1DB-13 specifies a maximum junction temperature of 150°C. Most substitutes (ER1D-LTP, STTH1R02U, STTH2R02U, STTH4R02U, STTH4R02UY) specify a maximum junction temperature of 175°C, providing 25°C additional thermal margin. Extended temperature range enables operation in higher-ambient or higher-power-dissipation environments. STTH4R02UY additionally specifies a minimum junction temperature of -40°C, suitable for automotive and extended-temperature applications.

Q: Is STTH4R02UY suitable for automotive applications?

A: Yes. STTH4R02UY is designated as Automotive grade with operating temperature range -40°C to 175°C, meeting automotive thermal and reliability requirements. This part is suitable for automotive power supply, motor control, and battery management applications. Non-automotive variants (STTH4R02U) lack automotive designation and should not be used in automotive applications without design review.

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