FR107 Alternative and Replacement Guide

YINT FR107W and RS1M are the primary 1000 V, 1 A fast-recovery candidates for customers moving an FR107 function to a surface-mount design. The guide focuses on recovery behavior, package choice and application fit.

What the FR107 is

The FR107 is the 1000 V member of the FR101 through FR107 fast-recovery family. A maximum reverse recovery time around 500 ns distinguishes it from standard rectifiers used mainly at line frequency. Diodes Incorporated marks its FR107 product as not recommended for new designs, which makes qualification of a current source important.

The reference device is a fast recovery silicon rectifier using fast recovery silicon in DO-41 axial lead. A useful replacement comparison covers reverse voltage, forward current, surge capability, forward loss, leakage, recovery behavior, temperature and package at the relevant test conditions.

FR107 key specifications

The table summarizes the reference family and the YINT candidate. Confirm the complete manufacturer order code and current datasheet for the source in your BOM; YINT can help review the comparison for your application.

FR107 and YINT candidate comparison

The reference FR107 is listed at 1000 V and 1.0 A in DO-41 axial lead. YINT FR107W or RS1M is listed at 1000 V and 1.0 A in SOD-123FL or SMA surface mount. Use the table to compare the remaining surge, forward-voltage, leakage and temperature limits at the stated test conditions.

Choosing the right FR107 replacement

Reverse voltage margin

Measure the maximum reverse voltage at the diode terminals under steady state, startup, shutdown, minimum load, maximum input and credible fault conditions. Use a probe connection that does not create its own ringing. Select a repetitive reverse rating above the measured peak with the margin required by the product standard and reliability target.

Forward current and thermal design

Average current alone does not establish thermal compatibility. Rectifier current is often pulsed, and package ratings assume a defined lead or case temperature. Calculate conduction loss from the current waveform, then verify junction temperature using the replacement package thermal path and the actual copper area.

At 0.7 A and 1.3 V, the upper-bound conduction estimate is about 0.91 W while forward biased. Switching loss and thermal resistance must be added for high-frequency operation.

Surge current and startup stress

Compare the surge waveform, pulse duration, initial junction temperature and repetition rate with the candidate data. A single half-sine IFSM number is not a repetitive-current rating. Capacitor charging, motor stall and hot-plug events may need separate transient analysis.

Switching behavior

Reverse recovery is a primary selection parameter for a fast-recovery rectifier. Compare trr only when the test current, reverse current and di dt conditions are equivalent. Bench-check switch current and voltage overshoot after substitution.

Package options and design support

The proposed YINT package is SOD-123FL or SMA surface mount, while the reference part uses DO-41 axial lead. For a new PCB, review pad dimensions, polarity, creepage and thermal copper around the YINT package. For an existing layout, send the board drawing to YINT so the team can check the available package route.

FR107 replacement options from YINT

Recommended YINT alternative

FR107W and RS1M suit flyback, snubber, relay-suppression and auxiliary-supply circuits that need the 1000 V, 1 A and approximately 500 ns recovery class. Compare recovery data at equivalent test conditions.

Package options for your design

Specify at the inquiry stage whether the design can use SOD-123FL or SMA surface mount or must retain the DO-41 axial lead layout. This lets YINT identify the correct order code and prepare a relevant sample.

Why choose YINT for FR107 replacement

YINT can support the FR107 replacement project with a focused parameter comparison, the YINT FR107W or RS1M datasheet, package guidance and sample coordination. Share the original order code and application requirements to receive a recommendation based on the actual circuit instead of a generic part-number cross-reference.

YINT support for your FR107 replacement project

1. Submit the complete FR107 order code and a short description of the application.
2. YINT reviews the electrical class and shortlists the relevant FR107W or RS1M order code.
3. The customer and YINT confirm the package, polarity and mounting requirements.
4. YINT coordinates the datasheet, quotation and sample quantity for the selected candidate.
5. The customer evaluates the sample in the target circuit, with YINT available for technical questions.
6. Sales confirms the production quantity, target date and commercial terms for the approved order code.

Information for a fast YINT replacement recommendation

• Original manufacturer, complete FR107 order code, datasheet or a clear part photo.
• Circuit function, schematic details, input and output conditions, and switching frequency.
• Required reverse voltage, forward current, surge waveform, recovery behavior, leakage and thermal limits.
• Existing package and footprint, polarity, solder process, and whether a PCB update is planned. The YINT FR107W or RS1M candidate uses SOD-123FL or SMA surface mount.
• Operating-temperature range, environmental or qualification standard, sample quantity and project timing.

FAQ

1. Which YINT part is recommended as a FR107 alternative

Start with YINT FR107W or RS1M. Its headline class is 1000 V and 1.0 A; the final order code depends on the package and operating conditions.

2. What is the reverse voltage of FR107

The reference repetitive reverse-voltage rating is 1000 V. The circuit waveform must remain below that rating with the required design margin.

3. What current can FR107 carry

The published average forward-current rating is 1.0 A, but the permitted current depends on the waveform, mounting condition and temperature.

4. Which package options are available for the replacement

The proposed YINT FR107W or RS1M uses SOD-123FL or SMA surface mount; the reference FR107 uses DO-41 axial lead. Send a footprint drawing if package compatibility is a priority.

5. How can I request a confirmed YINT replacement recommendation

Send YINT the complete FR107 order code, original datasheet or part photo, circuit conditions, package requirement and target quantity. The team can then recommend an exact order code and coordinate samples for customer evaluation.

6. What reverse recovery time should replace FR107

Use a device with a maximum recovery time no slower than the circuit permits. Common FR107 references specify 500 ns, but compare the measurement conditions as well as the number.

Selection summary

Use YINT FR107W or RS1M as the first cross-reference candidate for FR107, then choose the package and exact order code from the circuit's voltage, current, surge, thermal and switching requirements.

To begin, send YINT the complete FR107 order code, the required package, the main operating conditions, sample quantity and target date. The team can return a focused datasheet and sample response.