S1B-13 Equivalent & Substitute Parts

Part Overview

The S1B-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and repair applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while meeting modern compliance requirements.

Key Parameters

Parameter	S1B-13 Value	Substitution Criteria
Voltage - DC Reverse (Vr) (Max)	100 V	Must equal or exceed 100 V
Current - Average Rectified (Io)	1 A	Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	Lower values acceptable; higher values require circuit analysis
Reverse Recovery Time (trr)	3 µs	Standard or faster recovery acceptable
Current - Reverse Leakage @ Vr	5 µA @ 100 V	Lower or equal values acceptable
Package / Case	DO-214AC, SMA	Must match for PCB compatibility
Mounting Type	Surface Mount	Must be surface mount
Operating Temperature - Junction	-65°C ~ 150°C	Must cover or exceed application temperature range

Substitute Part Grouping Explanation

Substitution logic for the S1B-13 is based on strict electrical and mechanical parameter matching within the rectifier diode category. All substitute parts must satisfy the following criteria:

Mandatory Matching Parameters:

Voltage rating: 100 V DC reverse (Vr)
Current rating: 1 A average rectified (Io)
Package: DO-214AC (SMA) surface mount
Mounting type: Surface mount

Acceptable Parameter Variations:

Forward voltage (Vf): Values lower than 1.1 V @ 1 A are acceptable; higher values require circuit-level verification
Reverse recovery time (trr): Both standard recovery (>500 ns) and fast recovery (≤500 ns) types are acceptable
Reverse leakage current: Values equal to or lower than 5 µA @ 100 V are acceptable
Operating temperature range: Must accommodate the application's thermal requirements

Compliance Considerations:

RoHS3 compliance is preferred for new designs but not mandatory for legacy applications
All substitute parts maintain EAR99 export classification and identical HTSUS codes

Substitute parts are grouped by product status (Active, Not For New Designs, Discontinued) and manufacturer to facilitate selection based on availability and design phase requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ 1A	trr	Ir @ 100V	Package	Product Status	RoHS Status
S1B-13	Diodes Incorporated	100 V	1 A	1.1 V	3 µs	5 µA	DO-214AC (SMA)	Discontinued	Non-compliant
S1B-13-F	Diodes Incorporated	100 V	1 A	1.1 V	3 µs	5 µA	DO-214AC (SMA)	Active	ROHS3 Compliant
EGF1B	Fairchild Semiconductor	100 V	1 A	1 V	50 ns	10 µA	DO-214AC (SMA)	Active	Not specified
ES1B	YAGEO	Not specified	Not specified	0.95 V	Not specified	Not specified	DO-214AC	Active	ROHS3 Compliant
ES1B-E3/5AT	Vishay General Semiconductor - Diodes Division	100 V	1 A	920 mV	25 ns	5 µA	DO-214AC (SMA)	Active	ROHS3 Compliant
ES1B-E3/61T	Vishay General Semiconductor - Diodes Division	100 V	1 A	920 mV	25 ns	5 µA	DO-214AC (SMA)	Active	ROHS3 Compliant
ES1B-LTP	Micro Commercial Co	100 V	1 A	950 mV	35 ns	5 µA	DO-214AC (SMA)	Not For New Designs	ROHS3 Compliant
ESH1B-E3/61T	Vishay General Semiconductor - Diodes Division	100 V	1 A	900 mV	25 ns	1 µA	DO-214AC (SMA)	Active	ROHS3 Compliant
GF1B	onsemi	100 V	1 A	1 V	2 µs	5 µA	DO-214AC (SMA)	Not For New Designs	ROHS3 Compliant
GS1B-LTP	Micro Commercial Co	100 V	1 A	1 V	Not specified	10 µA	DO-214AC (SMA)	Not For New Designs	ROHS3 Compliant
RGF1B	Fairchild Semiconductor	100 V	1 A	1.3 V	150 ns	5 µA	DO-214AC (SMA)	Active	Not specified

Engineering Selection Recommendations

For Active Production (New Designs):

The S1B-13-F is the direct functional equivalent of the S1B-13, manufactured by Diodes Incorporated with identical electrical specifications and RoHS3 compliance. This part is the primary substitute for new designs and ongoing production requiring the original performance characteristics.

ES1B-E3/5AT and ES1B-E3/61T (Vishay General Semiconductor - Diodes Division) are active alternatives with improved performance characteristics: lower forward voltage (920 mV vs. 1.1 V), faster reverse recovery time (25 ns vs. 3 µs), and RoHS3 compliance. These parts are suitable for applications where reduced power dissipation and faster switching are beneficial.

ESH1B-E3/61T (Vishay General Semiconductor - Diodes Division) offers the lowest reverse leakage current (1 µA vs. 5 µA) and lowest forward voltage (900 mV), with extended operating temperature range to 175°C. This part is recommended for precision applications requiring minimal leakage.

EGF1B (Fairchild Semiconductor) and RGF1B (Fairchild Semiconductor) are active alternatives with fast recovery characteristics. RGF1B exhibits higher forward voltage (1.3 V) and should be evaluated for thermal impact in power-sensitive applications.

For Legacy/Repair Applications:

GF1B (onsemi) and ES1B-LTP (Micro Commercial Co) are marked "Not For New Designs" but remain available for repair and legacy system support. These parts maintain full electrical compatibility with the S1B-13.

GS1B-LTP (Micro Commercial Co) is available for legacy applications but exhibits higher reverse leakage current (10 µA vs. 5 µA).

Compliance Status:

All substitute parts listed maintain EAR99 export classification and identical HTSUS codes (8541.10.0080). RoHS3-compliant alternatives are available for all applications. The original S1B-13 is RoHS non-compliant; migration to RoHS3-compliant substitutes is recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can S1B-13-F be used as a direct replacement for S1B-13?

A: Yes. S1B-13-F is manufactured by Diodes Incorporated with identical electrical specifications (100 V, 1 A, 1.1 V forward voltage, 3 µs recovery time). The primary difference is RoHS3 compliance and active product status. Electrical performance is equivalent.

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

A: Standard recovery diodes (S1B-13, GF1B, GS1B-LTP) have reverse recovery times exceeding 500 ns. Fast recovery diodes (ES1B-E3/5AT, ES1B-E3/61T, ESH1B-E3/61T, EGF1B) have reverse recovery times of 500 ns or less. Fast recovery types reduce switching losses and are suitable for higher-frequency applications. Both types are electrically compatible at the 100 V, 1 A rating.

Q: Does lower forward voltage affect circuit operation?

A: Lower forward voltage reduces power dissipation in the diode but does not affect circuit functionality. ES1B-E3/5AT (920 mV) and ESH1B-E3/61T (900 mV) dissipate less heat than the original S1B-13 (1.1 V). Higher forward voltage (RGF1B at 1.3 V) increases dissipation and should be evaluated for thermal management in power-constrained designs.

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

A: Yes. All substitute parts listed use the DO-214AC (SMA) surface mount package, ensuring PCB footprint compatibility with the S1B-13.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current affects DC bias conditions and power consumption in standby states. ESH1B-E3/61T (1 µA) has the lowest leakage, suitable for precision analog circuits. GS1B-LTP (10 µA) has the highest leakage but remains within acceptable limits for general-purpose rectification. The original S1B-13 specifies 5 µA.

Q: Which substitute is recommended for new designs?

A: S1B-13-F is the direct equivalent for designs requiring original specifications. For new designs, ES1B-E3/5AT or ES1B-E3/61T offer improved performance (lower forward voltage, faster recovery) with RoHS3 compliance and active product status. ESH1B-E3/61T is recommended for applications requiring minimal leakage current.

Q: Can I use parts marked "Not For New Designs" in production?

A: Parts marked "Not For New Designs" (GF1B, ES1B-LTP, GS1B-LTP) are suitable for repair, maintenance, and legacy system support. They are not recommended for new product development due to potential future availability constraints.

Q: What is the operating temperature range consideration?

A: The S1B-13 operates from -65°C to 150°C. Most substitutes extend the upper limit to 175°C (EGF1B, RGF1B, ES1B-LTP, ESH1B-E3/61T, GF1B), providing additional thermal margin. ES1B-E3/5AT and ES1B-E3/61T operate to 150°C, matching the original specification. Verify application temperature requirements before selection.

Q: Are there RoHS compliance differences between substitutes?

A: The original S1B-13 is RoHS non-compliant. All active substitute parts (S1B-13-F, ES1B-E3/5AT, ES1B-E3/61T, ESH1B-E3/61T, GF1B, GS1B-LTP) are RoHS3 compliant. EGF1B and RGF1B (Fairchild Semiconductor) do not specify RoHS status in the provided data.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message