Loading…
DO-41 · FR107
ActiveFast-Recovery Rectifier (1kV/1A)
FR107
Diodes Incorporated · DO-41 · Fast-Recovery Rectifier (1kV/1A)
Price on Request
Get a competitive quote within 24 hours. Volume discounts available. Shenzhen stock ships in 1-2 business days.
Overview
The FR107 is the 1000 V, 1.0 A fast-recovery member of the FR101 to FR107 family from Diodes Incorporated, a glass-passivated silicon rectifier in the same DO-41 axial outline as the 1N4007 but with a specified reverse recovery time of 500 ns maximum. The measurement is defined in the datasheet at IF = 0.5 A, IR = 1.0 A and IRR = 0.25 A, which puts it in the useful middle ground between a standard rectifier (tens of microseconds) and an ultrafast part such as the UF4007 (75 ns) — fast enough to keep recovery loss and EMI manageable in converters running to a few hundred kilohertz, without the higher forward drop of an ultrafast die.
Alongside the recovery specification the part blocks 1000 V repetitive peak reverse voltage (700 Vrms), conducts 1.0 A average forward current at 9.5 mm lead length and TA = 75 °C, drops 1.3 V maximum at 1.0 A, withstands 30 A of 8.3 ms surge current, leaks 5.0 µA maximum at 25 °C and 100 µA at 100 °C, and operates from -65 °C to +175 °C junction and storage temperature. Thermal resistance is 50 °C/W junction-to-ambient on a PCB with 9.5 mm leads, typical junction capacitance is 15 pF at 1 MHz and 4 V, the case is UL 94V-0 molded plastic with a 0.35 g body, and the family is qualified to meet the environmental tests of MIL-STD-750C.
Designers should note two things. First, the fast recovery is bought with a higher forward drop: 1.3 V versus 1.1 V for a 1N4007, because carrier-lifetime killing that shortens trr also raises conduction loss. Second, Diodes Incorporated marks the FR106/FR107 datasheet as not recommended for new designs and points to the PR1006G and PR1007G green-passivated replacements, so for a fresh socket evaluate PR1007G while keeping FR107 for legacy builds and repair. In the field the FR107 is everywhere: secondary rectification in flyback and forward converters, freewheeling in DC motor and relay circuits, snubber legs in switching supplies and welders, and high-voltage multiplier cascades.
Supply is broad — Rectron, MDD, HY Electronic, Won-Top and other Asian fabs produce the same JEDEC part in DO-41 — and pricing is commodity-level. That abundance creates the single most common fraud in this category: a 1N4007 remarked as an FR107. It is invisible to a multimeter and even to a curve tracer in DC mode, because both parts have the same voltage and current ratings. Qualify lots with a recovery-time tester, or build the part into a fixture running at your actual switching frequency and watch temperature and EMI. Shenzhen stock ships in 1 to 2 days at MOQ of 5,000 pcs per ammo pack or reel, or 100 pcs loose.
Key Features
- 500 ns maximum reverse recovery time — roughly 60 times faster than a 1N4007
- 1000 V VRRM / 700 Vrms with 1.0 A average forward current
- 30 A 8.3 ms surge rating and a -65 °C to +175 °C junction range
- Glass-passivated DO-41 case, UL 94V-0, 0.35 g, MIL-STD-750C environmental tests
- Diodes Inc lists PR1007G as the recommended replacement for new designs
Typical Applications
- Secondary rectification in flyback and forward converters to a few hundred kHz
- Freewheeling diodes in DC motor drives, relays and solenoids
- Snubber and clamp networks in switching supplies, welders and induction heaters
- High-voltage multiplier and cascade generator stages
- Input bridges where recovery EMI must be reduced without going ultrafast
Specifications
- Repetitive Peak Reverse Voltage (VRRM)
- 1000 V
- Average Forward Rectified Current (IF(AV), 9.5 mm Lead Length, TA = 75 °C)
- 1.0 A
- Peak Forward Surge Current (IFSM, 8.3 ms Half Sine)
- 30 A
- Maximum Forward Voltage (VF at 1.0 A)
- 1.3 V
- Maximum Reverse Recovery Time (trr, IF = 0.5 A, IRR = 0.25 A)
- 500 ns
- Maximum DC Reverse Current (IR at 25 °C, Rated VDC)
- 5.0 µA
- Typical Thermal Resistance (RθJA)
- 50 °C/W
- Operating and Storage Junction Temperature
- -65 to +175 °C
- Pins
- 2
- RoHS
- Compliant
Procurement Tips
For new designs, quote the PR1007G replacement on the same BOM line, and insist on a recovery-time test report for any FR107 lot bought outside the authorized channel — remarked 1N4007 parts are the standard substitution and they pass every DC test.
Frequently Asked Questions
Can I swap an FR107 and a 1N4007?
Mechanically yes — both are DO-41, 1000 V, 1 A. Electrically, only in one direction. An FR107 will happily replace a 1N4007 (it costs more and drops 0.2 V extra), but a 1N4007 in an FR107 position will overheat and radiate EMI because its recovery time is tens of microseconds instead of 500 ns.
FR107 versus UF4007 — which is better?
The UF4007 recovers in 75 ns versus 500 ns, so it wins above roughly 100 kHz and in low-EMI designs, but its forward drop is about 1.7 V versus 1.3 V, which raises conduction loss at high current. Choose FR107 for 20 kHz to 200 kHz duty at 1 A, and UF4007 for faster nodes.
Why is the forward voltage higher than a 1N4007?
Fast recovery is achieved by reducing minority-carrier lifetime (gold or platinum diffusion, or electron irradiation). Shorter lifetime means less stored charge and faster turn-off, but it also increases the forward voltage of the junction. It is an unavoidable trade, not a defect.
What test condition defines the 500 ns recovery?
The datasheet note specifies IF = 0.5 A, IR = 1.0 A and IRR = 0.25 A. Recovery time is very sensitive to di/dt and the reverse current used as the end point, so compare trr figures between vendors only when the test conditions match.
Is the FR107 obsolete?
No, but Diodes Incorporated flags the FR106/FR107 datasheet as not recommended for new designs and recommends the PR1006G/PR1007G. Many other manufacturers still produce FR107 in volume, so replacement stock for legacy equipment is easy to source; for a new certification, evaluate PR1007G.
How do I catch a 1N4007 remarked as an FR107?
DC measurements will not help — the voltage and current ratings match. Use a reverse-recovery tester, or a simple fixture that commutates the diode at your operating frequency and compare case temperature and radiated noise against a known-good sample. Also check weight (0.35 g), lead finish and marking quality.
What are the MOQ and lead times?
MOQ is typically 5,000 pcs per ammo pack or tape-and-reel, or 100 pcs loose for prototype and repair work. Shenzhen stock ships in 1 to 2 days; factory channel replenishment runs 4 to 8 weeks depending on brand.
Alternatives & Equivalents
View full cross-reference table →Need FR107 pricing and availability?
Submit an RFQ — we reply within 24 hours with stock, pricing, lead time and packaging options.
Request a Quote →