GF1M Equivalent & Substitute Parts

Part Overview

The GF1M is a general-purpose rectifier diode manufactured by onsemi, rated for 1000 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status within onsemi's product portfolio. Identifying equivalent and substitute parts is necessary for applications requiring continued supply, design updates, or alternative sourcing strategies.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Capacitance @ Vr, F	15	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 175°C	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the GF1M are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC (SMA) surface mount
Mounting Type: Surface Mount
Technology: Standard recovery rectifier

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: 1.1 V to 1.3 V @ 1 A (acceptable range)
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ rated voltage
Operating Temperature - Junction: Minimum -55°C to maximum 150°C or higher
RoHS Status: ROHS3 Compliant

Parts meeting all primary criteria are classified as direct electrical equivalents. Parts with identical voltage and current ratings but different package types (DO-214BA) or manufacturers are classified as functional equivalents with package considerations.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	trr [µs]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
GF1M	onsemi	1000	1	1.2	2	5 @ 1000V	DO-214AC (SMA)	-65 ~ 175	Not For New Designs
MRA4007T3G	onsemi	1000	1	1.1	—	10 @ 1000V	DO-214AC (SMA)	-55 ~ 175	Not For New Designs
NRVA4007T3G	onsemi	1000	1	1.1	—	10 @ 1000V	DO-214AC (SMA)	-55 ~ 150	Not For New Designs
RS1M	EVVO Semi	1000	1	1.3	0.5	5 @ 1kV	DO-214AC (SMA)	-55 ~ 150	Active
S1M	EVVO Semi	1000	1	1.1	—	5 @ 1kV	DO-214AC (SMA)	-55 ~ 150	Active
GF1M-E3/67A	Vishay General Semiconductor	1000	1	1.2	2	5 @ 1000V	DO-214BA (GF1)	-65 ~ 175	Active
CGRA4007-G	Comchip Technology	1000	1	1.1	—	5 @ 1000V	DO-214AC (SMA)	-55 ~ 150	Active
CMR1-10M TR13 PBFREE	Central Semiconductor Corp	1000	1	1.1	—	5 @ 1000V	DO-214AC (SMA)	-65 ~ 150	Active
MRA4006T3G	onsemi	800	1	1.1	—	10 @ 800V	DO-214AC (SMA)	-55 ~ 175	Not For New Designs
RS1K	Fairchild Semiconductor	800	1	1.3	0.5	5 @ 800V	DO-214AC (SMA)	-55 ~ 150	Active
S1K	YAGEO	—	—	—	—	DO-214AC	—	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (1000 V, 1 A, DO-214AC/SMA Package):

Parts MRA4007T3G, NRVA4007T3G, RS1M, S1M, CGRA4007-G, and CMR1-10M TR13 PBFREE meet all primary electrical and mechanical specifications of the GF1M. These parts are suitable for direct substitution in applications requiring 1000 V reverse voltage and 1 A rectified current in surface mount SMA packaging.

Among these equivalents, RS1M and S1M are classified as Active products, providing continued long-term availability. CGRA4007-G and CMR1-10M TR13 PBFREE are also Active status parts from alternative manufacturers (Comchip Technology and Central Semiconductor Corp, respectively), offering additional sourcing options.

Package Variant Equivalent (1000 V, 1 A, DO-214BA Package):

GF1M-E3/67A, manufactured by Vishay General Semiconductor, provides identical electrical specifications to the GF1M (1.2 V forward voltage, 2 µs reverse recovery time, 5 µA reverse leakage) with an extended temperature range (-65°C to 175°C) and Active product status. This part differs only in package type (DO-214BA instead of DO-214AC/SMA). Substitution requires PCB layout modification to accommodate the different package footprint.

Lower Voltage Alternatives (800 V, 1 A, DO-214AC/SMA Package):

MRA4006T3G and RS1K are rated for 800 V reverse voltage instead of 1000 V. These parts are suitable only for applications where the maximum reverse voltage requirement does not exceed 800 V. RS1K is an Active product from Fairchild Semiconductor with fast recovery characteristics (500 ns).

Compliance and Availability:

All recommended substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Active status parts (RS1M, S1M, GF1M-E3/67A, CGRA4007-G, CMR1-10M TR13 PBFREE, RS1K) provide superior long-term supply assurance compared to the GF1M's "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can MRA4007T3G be used as a direct replacement for GF1M?

A: Yes. MRA4007T3G meets all primary electrical specifications: 1000 V reverse voltage, 1 A rectified current, and DO-214AC (SMA) surface mount package. Forward voltage is 1.1 V compared to GF1M's 1.2 V, which is within acceptable operating margins. The primary difference is product status; MRA4007T3G is also "Not For New Designs," so long-term availability may be limited.

Q: What is the difference between RS1M and S1M?

A: Both parts are manufactured by EVVO Semi and rated for 1000 V, 1 A in DO-214AC (SMA) packages with Active product status. RS1M features fast recovery characteristics (500 ns reverse recovery time, 1.3 V forward voltage), while S1M has standard recovery characteristics (1.1 V forward voltage). Selection depends on application speed requirements. S1M is preferred for standard rectification applications; RS1M is preferred for applications requiring faster switching.

Q: Can GF1M-E3/67A replace GF1M in existing designs?

A: GF1M-E3/67A provides identical electrical performance (1.2 V forward voltage, 2 µs reverse recovery time, 5 µA reverse leakage) and superior product status (Active). However, the package differs: GF1M-E3/67A uses DO-214BA (GF1) instead of DO-214AC (SMA). PCB footprint modification is required. The part is manufactured by Vishay General Semiconductor and maintains the same temperature range (-65°C to 175°C).

Q: Are 800 V parts (MRA4006T3G, RS1K) suitable substitutes?

A: 800 V parts are suitable only if the application's maximum reverse voltage requirement does not exceed 800 V. If the circuit design requires 1000 V rating for safety margin or worst-case conditions, 800 V alternatives introduce risk of diode failure. Verify circuit requirements before substitution.

Q: Which substitute part offers the best long-term availability?

A: RS1M, S1M, GF1M-E3/67A, CGRA4007-G, and CMR1-10M TR13 PBFREE all carry Active product status, indicating continued manufacturing and supply. Among these, RS1M and S1M from EVVO Semi and GF1M-E3/67A from Vishay General Semiconductor represent established manufacturers with broad distribution networks.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time affects switching speed and switching losses in rectifier applications. GF1M has 2 µs recovery time (standard recovery). RS1M has 0.5 µs (fast recovery). For low-frequency rectification (50/60 Hz), recovery time difference is negligible. For high-frequency switching applications, fast recovery parts (RS1M) reduce switching losses and heat generation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching GF1M's compliance profile.

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

A: "Not For New Designs" indicates the part has reached end-of-life within the manufacturer's portfolio. While existing inventory may be available, the manufacturer does not recommend this part for new circuit designs. Active status parts are preferred for new designs and provide longer supply guarantees.

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