Equivalent & Substitute Parts for RGF1B

Part Overview

The RGF1B is a general-purpose rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part number may be unavailable or where design flexibility permits alternative qualified components.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ 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
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the RGF1B is determined by strict electrical and mechanical compatibility. The following criteria must be met:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Compatibility Factors:

Package / Case: DO-214AC (SMA) or DO-214BA (GF1) — both are surface mount packages compatible with standard pick-and-place equipment
Reverse Recovery Time (trr): Fast recovery classification (≤ 500ns, > 200mA) preferred for switching applications
Forward Voltage (Vf): Variations within 0.9 V to 1.3 V @ 1 A are acceptable for general-purpose rectification
Operating Temperature Range: -55°C to 175°C minimum

Substitute parts are grouped into two categories:

Category A — Direct Package Match (DO-214AC / SMA): Parts maintaining the original DO-214AC package footprint, ensuring zero PCB layout modification.

Category B — Alternative Package (DO-214BA / GF1): Parts using DO-214BA package, which differs in physical dimensions but maintains surface mount compatibility and electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	trr [ns]	Package	Status
RGF1B	onsemi	100	1	1.3	150	DO-214AC	Not For New Designs
CFRA102-G	Comchip Technology	100	1	1.3	150	DO-214AC	Active
CGRA4002-G	Comchip Technology	100	1	1.1	—	DO-214AC	Active
ES1B-13-F	Diodes Incorporated	100	1	0.92	25	DO-214AC	Active
ES1B-E3/5AT	Vishay General Semiconductor	100	1	0.92	25	DO-214AC	Active
ES1B-E3/61T	Vishay General Semiconductor	100	1	0.92	25	DO-214AC	Active
ESH1B-E3/5AT	Vishay General Semiconductor	100	1	0.9	25	DO-214AC	Active
RGF1B-E3/67A	Vishay General Semiconductor	100	1	1.3	150	DO-214BA	Not For New Designs
EGF1B-E3/5CA	Vishay General Semiconductor	100	1	1.0	50	DO-214BA	Active
EGF1B-E3/67A	Vishay General Semiconductor	100	1	1.0	50	DO-214BA	Not For New Designs
GF1B-E3/5CA	Vishay General Semiconductor	100	1	1.1	2000	DO-214BA	Active

Engineering Selection Recommendations

For Direct Replacement (Same PCB Footprint — DO-214AC Package):

CFRA102-G (Comchip Technology) — Identical electrical specifications to RGF1B. Active product status. Recommended for applications requiring no PCB modification. Vr = 100 V, Io = 1 A, Vf = 1.3 V @ 1 A, trr = 150 ns.
ES1B-E3/5AT (Vishay General Semiconductor) — Active product with improved performance characteristics. Lower forward voltage (0.92 V vs. 1.3 V) reduces power dissipation. Faster recovery time (25 ns vs. 150 ns) improves switching efficiency. Operating temperature range -55°C to 150°C. Suitable for general-purpose rectification with enhanced thermal performance.
ES1B-E3/61T (Vishay General Semiconductor) — Functionally equivalent to ES1B-E3/5AT. Active product status. Highest inventory availability (70,533 pcs). Identical electrical and thermal specifications.
CGRA4002-G (Comchip Technology) — Active product. Lower forward voltage (1.1 V) compared to RGF1B. Operating temperature range -55°C to 150°C. Suitable where reduced power dissipation is beneficial.
ESH1B-E3/5AT (Vishay General Semiconductor) — Active product with lowest reverse leakage current (1 µA vs. 5 µA). Lowest forward voltage (0.9 V). Extended operating temperature range to 175°C. Recommended for precision applications requiring minimal leakage.

For Alternative Package (DO-214BA — GF1 Package):

EGF1B-E3/5CA (Vishay General Semiconductor) — Active product. Fast recovery diode (trr = 50 ns). Forward voltage 1.0 V @ 1 A. Operating temperature range -65°C to 175°C. Requires PCB layout modification due to different package footprint. Recommended where package change is acceptable and improved switching performance is required.
RGF1B-E3/67A (Vishay General Semiconductor) — Electrical equivalent to RGF1B but in DO-214BA package. Not For New Designs status. Use only for legacy system compatibility where DO-214BA footprint is already established.

Product Status Guidance:

Active Status Parts (CFRA102-G, CGRA4002-G, ES1B-13-F, ES1B-E3/5AT, ES1B-E3/61T, ESH1B-E3/5AT, EGF1B-E3/5CA, GF1B-E3/5CA) are recommended for new designs and ongoing production.
Not For New Designs Status (RGF1B, RGF1B-E3/67A, EGF1B-E3/67A) are suitable only for maintenance, repair, and legacy system support.

Frequently Asked Questions (FAQ)

Q1: Can I substitute RGF1B with CFRA102-G without modifying my PCB?

A: Yes. CFRA102-G maintains identical electrical specifications (100 V, 1 A, 1.3 V forward voltage, 150 ns recovery time) and uses the same DO-214AC (SMA) package. No PCB layout modification is required. Both parts are RoHS3 compliant with MSL 1 rating.

Q2: What is the difference between DO-214AC and DO-214BA packages?

A: DO-214AC (SMA) and DO-214BA (GF1) are both surface mount packages but have different physical dimensions and PCB footprints. DO-214AC is smaller and more compact. DO-214BA is larger. Substitution between these packages requires PCB layout modification. Verify your PCB design before selecting a part with an alternative package.

Q3: Why do some substitute parts have lower forward voltage (Vf)?

A: Forward voltage variation (0.9 V to 1.3 V @ 1 A) is within the acceptable range for general-purpose rectifier diodes. Lower forward voltage reduces power dissipation and heat generation. Parts like ES1B-E3/5AT (0.92 V) and ESH1B-E3/5AT (0.9 V) offer improved efficiency compared to RGF1B (1.3 V). This is beneficial in high-current or thermally constrained applications.

Q4: What does "Not For New Designs" mean?

A: This status indicates the manufacturer has discontinued active development and recommends using alternative parts for new product designs. However, these parts remain available for maintenance and repair of existing systems. RGF1B, RGF1B-E3/67A, and EGF1B-E3/67A carry this status. For new designs, select from Active status parts: CFRA102-G, CGRA4002-G, ES1B series, ESH1B-E3/5AT, EGF1B-E3/5CA, or GF1B-E3/5CA.

Q5: Which substitute part offers the fastest recovery time?

A: ES1B-13-F, ES1B-E3/5AT, ES1B-E3/61T, and ESH1B-E3/5AT all feature 25 ns reverse recovery time, significantly faster than RGF1B (150 ns). EGF1B-E3/5CA offers 50 ns recovery time. Faster recovery reduces switching losses and improves efficiency in high-frequency applications.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching RGF1B specifications. All parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q7: What is the operating temperature range difference between RGF1B and substitute parts?

A: RGF1B operates from -65°C to 175°C. Most substitute parts operate from -55°C to 150°C, except ESH1B-E3/5AT and EGF1B-E3/5CA which extend to 175°C. Verify your application's temperature requirements before selection. If operation below -55°C or above 150°C is required, select ESH1B-E3/5AT or EGF1B-E3/5CA.

Q8: Can I use GF1B-E3/5CA as a direct replacement for RGF1B?

A: GF1B-E3/5CA is electrically compatible (100 V, 1 A) but uses DO-214BA package instead of DO-214AC. Additionally, it is a standard recovery diode (trr = 2 µs) rather than fast recovery (trr = 150 ns). Use only if your PCB footprint supports DO-214BA and your application does not require fast recovery characteristics.

Q9: Which substitute part has the lowest reverse leakage current?

A: ESH1B-E3/5AT features the lowest reverse leakage current at 1 µA @ 100 V, compared to RGF1B and most other substitutes at 5 µA. This is beneficial in precision analog circuits and low-power applications where leakage current must be minimized.

Q10: What inventory considerations should I evaluate?

A: Current inventory levels vary significantly. ES1B-E3/61T has the highest availability (70,533 pcs), followed by EGF1B-E3/67A (30,200 pcs) and ES1B-E3/5AT (27,048 pcs). RGF1B has 39,800 pcs available. For long-term supply security, prioritize parts with higher inventory levels and Active product status.

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