Is there a pin-compatible replacement for RL207?

Yes, parts like FR207 and HER208 are pin-compatible in the DO-15 package. However, they are not electrically identical. They are faster diodes with different forward voltages, so they are functional alternatives, not direct drop-in replacements.

What risks should I check before replacing RL207?

When replacing RL207, check three key areas: 1) Forward Voltage (Vf), as substitutes may have higher Vf causing more heat; 2) Recovery Time (Trr), as faster diodes can cause EMI; and 3) Surge Current (IFSM) rating to ensure it meets your circuit's needs.

RL207 Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

RL207 is a widely used 1000V, 2A general-purpose rectifier in a DO-15 package. Alternatives often involve faster recovery diodes like the FR207 or HER208, which require careful review of forward voltage and switching characteristics.

AI replacement insight

Electrical riskmedium

Substitutes have higher forward voltage and are much faster, requiring circuit verification.

Package risklow

The DO-15 package is standard and widely available.

Sourcing risklow

Many manufacturers produce diodes with similar primary ratings.

Can it be replaced directly?

No direct drop-in replacement is confirmed without review. While parts like FR207 and HER208 share the same package and primary ratings, their different recovery times and forward voltages make them functional alternatives that must be verified in-circuit.

Best replacement path

The most common replacement path is to a fast recovery diode like FR207, which offers similar voltage/current ratings but requires checking the impact of a higher forward voltage and faster switching speed.

Main risk

The primary risk is increased power dissipation and heat due to higher forward voltage in substitutes, and potential EMI or circuit instability from faster switching speeds.

Recommended alternatives

Common functional alternative with same package and ratings, but higher forward voltage and faster speed require review.

View details

Alternative comparison matrix

Feature / factor	RL207	FR207	HER208	UF2010GP_AY_00001	Compatibility / risk
Package	DO-15	DO-15	DO-15	DO-15	DO-15 — Form factor matches.; HER208: Form factor matches.; UF2010GP_AY_00001: Form factor matches.
Voltage	1000V	1000V	1000V	1000V	1000V — Reverse voltage rating matches.; HER208: Reverse voltage rating matches.; UF2010GP_AY_00001: Reverse voltage rating matches.
Current	2.0A	2.0A	2.0A	2.0A	2.0A — Forward current rating matches.; HER208: Forward current rating matches.; UF2010GP_AY_00001: Forward current rating matches.
Forward Voltage	1.1V	1.3V	1.7V	1.7V	1.3V / 1.7V — Higher Vf, will increase power loss.; HER208: Significantly higher Vf, will increase power loss.; UF2010GP_AY_00001: Significantly higher Vf, will increase power loss.
Recovery Time	Standard (slow)	~500ns	~75ns	75ns	~500ns / ~75ns — Fast recovery vs standard. Check circuit impact.; HER208: Ultrafast vs standard. May cause EMI.; UF2010GP_AY_00001: Ultrafast vs standard. May cause EMI.

Application & sourcing insights

Questions & answers

FR207 is a frequently cited alternative. It is a fast-recovery diode with the same 1000V/2A rating and DO-15 package, but has a higher forward voltage (1.3V vs 1.1V) and faster speed. Always verify its suitability for your specific application.