Equivalent & Substitute Parts for RS1B-13

Part Overview

The RS1B-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 design support and procurement.

The RS1B-13 operates across a junction temperature range of -65°C to 150°C and features fast recovery characteristics with a reverse recovery time of 150 ns. RoHS non-compliance and discontinuation status require evaluation of compliant substitute options for new applications or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	1.3	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Capacitance @ Vr, F	15	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	Non-compliant	—

Substitute Part Grouping Explanation

Substitution of the RS1B-13 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 100 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC (SMA) or compatible surface mount package
Mounting Type: Surface Mount
Speed Classification: Fast Recovery or Standard Recovery

Secondary Compatibility Factors:

Voltage - Forward (Vf) Maximum @ If: 1.3 V or lower
Reverse Recovery Time (trr): 150 ns or lower
Current - Reverse Leakage @ Vr: 5 µA or lower
Operating Temperature - Junction: -65°C minimum and 150°C maximum or wider range

Substitute parts are grouped into three categories based on product status and compliance:

Direct Substitutes (Active, RoHS Compliant): Parts with identical electrical ratings and active product status, suitable for new designs and production continuity.
Functional Equivalents (Active, Alternative Package): Parts meeting all electrical requirements with active status but potentially different package designations or thermal ratings.
Legacy Alternatives (Not For New Designs): Parts meeting electrical requirements but marked as discontinued or not recommended for new designs; suitable only for legacy system support.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	trr (ns)	Ir @ Vr (µA)	Package	Product Status	RoHS Status
RS1B-13	Diodes Incorporated	100	1	1.3 V @ 1 A	150	5 @ 100 V	DO-214AC, SMA	Discontinued	Non-compliant
RS1B-13-F	Diodes Incorporated	100	1	1.3 V @ 1 A	150	5 @ 100 V	DO-214AC, SMA	Active	ROHS3 Compliant
RGF1B-E3/67A	Vishay General Semiconductor - Diodes Division	100	1	1.3 V @ 1 A	150	5 @ 100 V	DO-214BA	Not For New Designs	ROHS3 Compliant
RGF1B	Fairchild Semiconductor	100	1	1.3 V @ 1 A	150	5 @ 100 V	DO-214AC, SMA	Active	Not specified
EGF1B	Fairchild Semiconductor	100	1	1 V @ 1 A	50	10 @ 100 V	DO-214AC, SMA	Active	Not specified
ES1B	YAGEO	100	1	Not specified	Not specified	Not specified	DO-214AC	Active	ROHS3 Compliant
ES1B-E3/5AT	Vishay General Semiconductor - Diodes Division	100	1	920 mV @ 1 A	25	5 @ 100 V	DO-214AC, SMA	Active	ROHS3 Compliant
ES1B-E3/61T	Vishay General Semiconductor - Diodes Division	100	1	920 mV @ 1 A	25	5 @ 100 V	DO-214AC, SMA	Active	ROHS3 Compliant
ES1B-LTP	Micro Commercial Co	100	1	950 mV @ 1 A	35	5 @ 100 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
GF1B	onsemi	100	1	1 V @ 1 A	2000	5 @ 100 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
GS1B-LTP	Micro Commercial Co	100	1	1 V @ 1 A	Not specified	10 @ 100 V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: RS1B-13-F

The RS1B-13-F is the direct functional equivalent of the RS1B-13, manufactured by Diodes Incorporated with identical electrical specifications. This part is currently active in production and carries ROHS3 compliance certification. The RS1B-13-F is packaged in Tape & Reel format with 55,300 units in stock, providing immediate procurement availability. Selection of RS1B-13-F eliminates the need for circuit redesign or performance re-qualification.

Secondary Recommendations for Active Status:

ES1B-E3/5AT and ES1B-E3/61T (Vishay General Semiconductor - Diodes Division) are active production parts with ROHS3 compliance. Both parts meet the 100 V, 1 A electrical requirements and feature improved forward voltage characteristics (920 mV versus 1.3 V) and significantly reduced reverse recovery time (25 ns versus 150 ns). These parts are suitable for applications where lower forward voltage drop and faster switching are beneficial. Operating temperature range is -55°C to 150°C, matching the original part's upper limit.

RGF1B (Fairchild Semiconductor) is an active production part in DO-214AC (SMA) package with identical electrical specifications to RS1B-13. This part provides a direct alternative with 39,800 units in stock.

Legacy Alternatives:

ES1B-LTP, GF1B, and GS1B-LTP are marked as "Not For New Designs" and carry legacy product status. These parts meet the core electrical requirements but are not recommended for new circuit development. Use is limited to replacement applications in existing systems where design continuity is required.

RGF1B-E3/67A (Vishay) is marked "Not For New Designs" and uses the DO-214BA package variant rather than the standard DO-214AC (SMA) package. Package compatibility must be verified before selection.

Frequently Asked Questions (FAQ)

Q: Can RS1B-13-F be used as a direct replacement for RS1B-13 without circuit modification?

A: Yes. RS1B-13-F is manufactured by Diodes Incorporated with identical electrical specifications: 100 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage drop at 1 A, and 150 ns reverse recovery time. The primary difference is packaging format (Tape & Reel versus bulk) and RoHS compliance status. No circuit redesign is required.

Q: What is the difference between DO-214AC and DO-214BA packages?

A: DO-214AC (SMA) and DO-214BA (GF1) are distinct surface mount package designations with different physical dimensions and land patterns. Parts specified for DO-214AC cannot be substituted with DO-214BA variants without PCB layout modification. RGF1B-E3/67A uses DO-214BA and requires PCB redesign if selected as a replacement for RS1B-13 (DO-214AC).

Q: Why do some substitute parts have lower forward voltage (920 mV) compared to RS1B-13 (1.3 V)?

A: Forward voltage variation reflects differences in semiconductor material quality, doping profiles, and manufacturing processes across different manufacturers. ES1B-E3/5AT and ES1B-E3/61T exhibit lower forward voltage drop, which reduces power dissipation in the diode. This is a beneficial characteristic for applications sensitive to heat generation. Circuits designed for 1.3 V forward voltage will operate correctly with lower forward voltage alternatives.

Q: What does "Not For New Designs" product status mean?

A: Parts marked "Not For New Designs" are in legacy or end-of-life status. Manufacturers continue to produce these parts for existing customer support but do not recommend their use in new circuit development. These parts are suitable only for replacement applications in systems already deployed with these components. New designs should select parts with "Active" product status.

Q: Are all substitute parts RoHS compliant?

A: No. RS1B-13 is RoHS non-compliant. RS1B-13-F, ES1B-E3/5AT, ES1B-E3/61T, ES1B-LTP, GF1B, and GS1B-LTP are ROHS3 compliant. RGF1B and EGF1B do not specify RoHS status in the provided data. For applications requiring RoHS compliance, select from the ROHS3-compliant alternatives.

Q: Can GF1B be used as a substitute despite its 2 µs reverse recovery time?

A: GF1B meets the 100 V, 1 A electrical requirements and operates in the DO-214AC (SMA) package. However, its reverse recovery time of 2 µs (2000 ns) is significantly longer than RS1B-13 (150 ns), indicating standard recovery speed rather than fast recovery. This part is suitable only for applications where switching speed is not critical. GF1B is marked "Not For New Designs" and should not be selected for new circuit development.

Q: What is the significance of reverse recovery time in diode selection?

A: Reverse recovery time (trr) determines how quickly a diode transitions from conducting to blocking state when reverse bias is applied. Shorter reverse recovery time reduces switching losses and electromagnetic interference in high-frequency applications. RS1B-13 specifies 150 ns fast recovery. ES1B-E3/5AT and ES1B-E3/61T offer superior performance with 25 ns recovery time. GF1B and GS1B-LTP with longer recovery times are suitable only for low-frequency or DC applications.

Q: Is operating temperature range a critical substitution parameter?

A: Operating temperature range defines the thermal environment in which the diode functions reliably. RS1B-13 operates from -65°C to 150°C. ES1B-E3/5AT and ES1B-E3/61T operate from -55°C to 150°C, providing a narrower low-temperature range. For applications requiring operation below -55°C, these parts are not suitable. RGF1B, RGF1B-E3/67A, ES1B-LTP, GF1B, and GS1B-LTP support -65°C minimum temperature or lower, matching the original part's thermal specification.

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