ER1G Equivalent & Substitute Parts

Part Overview

The ER1G is a general-purpose rectifier diode manufactured by Diotec Semiconductor, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and features fast recovery characteristics with a reverse recovery time of 35 ns, making it suitable for applications requiring rapid switching performance.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified sources. The ER1G maintains compatibility with alternative manufacturers' offerings that meet identical electrical specifications and package requirements.

Substiute Parts

ER1G

Diotec SemiconductorIn Stock: 5399ER1G Datasheet

Current PartRFQ

GF1G

onsemiIn Stock: 6698GF1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ER1G is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Package / Case: DO-214AC (SMA) surface mount configuration
• Mounting Type: Surface Mount

Performance Characteristics:

• Reverse Recovery Time (trr): Fast recovery classification (≤ 500 ns)
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V maximum
• Operating Temperature Range: Minimum -50°C to 150°C junction temperature support

The GF1G from onsemi meets the core electrical and mechanical requirements for substitution. However, this part exhibits Standard Recovery characteristics (trr = 2 µs) rather than Fast Recovery, representing a functional difference in switching performance. The GF1G maintains voltage and current ratings identical to the ER1G and shares the DO-214AC package specification.

Parameter Comparison

Engineering Selection Recommendations

ER1G (Diotec Semiconductor) - Primary Selection

The ER1G maintains Active product status, indicating ongoing manufacturer support and continued availability. This part is suitable for new designs and applications requiring fast recovery diode performance. The 35 ns reverse recovery time supports high-frequency switching applications. ROHS3 compliance and active inventory of 5350 pieces support production continuity.

GF1G (onsemi) - Conditional Substitute

The GF1G is classified as Not For New Designs, restricting its application to legacy system maintenance, repair, or retrofit scenarios only. While electrical ratings and package specifications match the ER1G, the significantly longer reverse recovery time (2 µs versus 35 ns) indicates different switching performance characteristics. This part is not suitable for applications where fast recovery performance is a design requirement. The GF1G carries ROHS3 compliance and REACH Unaffected status. Selection of this substitute requires explicit design review to confirm that standard recovery performance is acceptable for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the GF1G directly replace the ER1G in all applications?

A: No. While both parts share identical voltage (400 V) and current (1 A) ratings and the same DO-214AC package, the GF1G exhibits standard recovery characteristics (2 µs) compared to the ER1G's fast recovery (35 ns). Applications sensitive to switching speed, electromagnetic interference, or thermal performance may not tolerate this difference. Design verification is required before substitution.

Q: What does "Not For New Designs" mean for the GF1G?

A: This product status indicates that onsemi does not recommend the GF1G for new circuit designs. The part remains available for existing applications and legacy system support. New designs should prioritize the ER1G or other Active-status alternatives.

Q: Are both parts RoHS compliant?

A: Yes. Both the ER1G and GF1G are ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.

Q: Do the parts share the same package and mounting requirements?

A: Yes. Both the ER1G and GF1G use the DO-214AC (SMA) surface mount package. PCB footprints and reflow soldering profiles are identical.

Q: What is the significance of the forward voltage difference between these parts?

A: The ER1G specifies 1.25 V forward voltage at 1 A, while the GF1G specifies 1 V at 1 A. This 0.25 V difference affects power dissipation in the diode. In applications with high current density or thermal constraints, the lower forward voltage of the GF1G may provide marginal thermal benefit, but this does not offset the recovery time performance difference.

Q: Which part should be selected for high-frequency rectification applications?

A: The ER1G is the appropriate selection for high-frequency applications. The 35 ns reverse recovery time enables faster switching transitions and reduced reverse recovery losses compared to the GF1G's 2 µs recovery time.

Q: Are there inventory considerations between these parts?

A: The ER1G has 5350 pieces in stock, while the GF1G has 6680 pieces available. However, the ER1G's Active status provides greater assurance of continued supply, whereas the GF1G's Not For New Designs classification may indicate declining availability over time.