Is there a pin-compatible replacement for 1N4148TR?

Yes, 1N4148TA, 1N4448, and 1N914BTR are widely recognized as pin-compatible replacements for the 1N4148TR, sharing the same DO-35 package and pinout.

What risks should I check before replacing 1N4148TR?

Key risks include mismatched voltage ratings, slower reverse recovery time (trr), or higher forward voltage. Always verify the candidate's datasheet for VRRM ≥ 100V, trr ≤ 4ns, and a comparable VF.

1N4148TR Alternatives, Datasheet & Cross Reference | onsemi

1N4148TR is a common 100V, 200mA fast switching diode in a DO-35 package. Several pin-compatible alternatives like the 1N4448 and 1N914 series exist, offering similar or improved performance.

AI replacement insight

Package risklow

The DO-35 package is standardized, so mechanical fit is rarely an issue.

Electrical riskmedium

Must verify VRRM ≥ 100V and trr ≤ 4ns. Incorrect selection can lead to device failure.

Can it be replaced directly?

Yes, 1N4148TA, 1N4448, and 1N914BTR are considered direct, pin-compatible replacements for most applications.

Best replacement path

1N4448 offers a slight upgrade with lower capacitance, while 1N914BTR offers lower power loss.

Main risk

The main risk is substituting with a diode that has a lower reverse voltage rating or a slower reverse recovery time (trr).

Recommended alternatives

A pin-compatible equivalent from the same manufacturer, differing only by packaging code.

View details

Alternative comparison matrix

Feature / factor	1N4148TR	1N4148TA	1N4448	1N914BTR	Compatibility / risk
Package	DO-204AH (DO-35)	DO-204AH (DO-35)	DO-204AH (DO-35)	DO-204AH (DO-35)	DO-204AH (DO-35) — Identical package and form factor.; 1N4448: Identical package and form factor.; 1N914BTR: Identical package and form factor.
Voltage	100 V	100 V	100 V	100 V	100 V — Max Repetitive Reverse Voltage (VRRM) matches.; 1N4448: VRRM matches.; 1N914BTR: VRRM matches.
Current	200 mA	200 mA	200 mA	-	200 mA — Average Rectified Forward Current (IO) matches.; 1N4448: IO matches.
Trr	4.0 ns	4 ns	-	4 ns	4 ns — Reverse Recovery Time (trr) matches.; 1N914BTR: Reverse Recovery Time matches.
Capacitance	4.0 pF	-	2.0 pF	-	2.0 pF — Lower capacitance is an improvement for switching speed.
Vf	1.0 V @ 10mA	-	-	0.62V - 0.72V @ 5mA	0.62V - 0.72V @ 5mA — Lower forward voltage is an improvement, reducing power loss.

Application & sourcing insights

Questions & answers

The 1N4448 and 1N914BTR from onsemi are excellent alternatives, offering identical or slightly better electrical characteristics in the same DO-35 package.