ProjectsPricingInsights

Best Alternatives to 1N4148PF

Package: DO-35STDiodes - Rectifiers - SinglePeak Reverse Voltage (VRM): 100 VReverse Voltage (VR): 75 VAverage Rectified Forward Current (IF(AV)): 200 mAForward Voltage (VF): 1 VReverse Recovery Time (trr): 4 ns

1N4148PF is a DO-35 fast switching diode. Similar 1N4148 and 1N4448 parts need pinout, voltage, and Tj review.

AI replacement insight

Electrical riskmedium

Voltage margin is limited.

Package risklow

Kept parts are DO-35 axial.

Firmware risklow

Discrete diode only.

Sourcing riskmedium

Suffix and vendor vary.

Can it be replaced directly?

No verified drop-in is shown because PDFs and pinout evidence are pending.

Best replacement path

Start with 1N4148TR or 1N4148TA, then verify Tj and pinout.

Main risk

Target Tj is 200°C; many candidates list 175°C.

Recommended alternatives

5
1N4148TR package
1N4148TR

onsemi

Needs validationmedium risk

1N4148TR is a close DO-35 fast-switching candidate with lower Tj.

View details

Alternative comparison matrix

Feature / factor1N4148PF1N4148TR1N4148TA1N4448Compatibility / risk
PackageDO-35DO-204AH/DO-35DO-204AH/DO-35DO-204AH/DO-35DO-204AH/DO-35 / DO-35/DO-204AH — Axial package; 1N4148TA: Axial package; 1N4448: Axial package; 1N4448TR: Axial package
Pinout2 pins2 pins2 pins2 pins2 pins — Pinout not cited; 1N4148TA: Pinout not cited; 1N4448: Pinout not cited; 1N4448TR: Pinout not cited
Voltage100 V peak100 V VRRM100 V VRRM100 V max100 V VRRM / 100 V max — No 1.1x margin; 1N4148TA: No 1.1x margin; 1N4448: No 1.1x margin; 1N4448TR: No 1.1x margin
Current200 mA avg200 mA avg200 mA avg200 mA avg200 mA avg / 150 mA avg — IF 300 mA; 1N4148TA: OK by ES; 1N4448: OK by ES; 1N4448TR: Derate load
Temperature200°C Tj175°C Tj175°C Tj175°C range175°C Tj / 175°C range — Derate needed; 1N4148TA: Derate needed; 1N4448: Derate needed; 1N4448TR: Derate needed

Application & sourcing insights

Questions & answers

1N4148TR or 1N4148TA look closest, but both need pinout and 175°C Tj review.