Part A
STPS20150CG
STMicroelectronics
- Lifecycle
- Active
- Stock
- 12992 PCS
- Package
- TO-263-3
- Series
- Diodes - Rectifiers - Arrays
Replacement verdict
Compatible functional replacement candidate
The STPS20150CG and STPS20M120STN share a common TO-247 package and 20 A average forward current rating, making them mechanically and thermally interchangeable in many designs. However, the STPS20150CG's 150 V repetitive peak reverse voltage and higher forward voltage differ from the STPS20M120STN's 120 V rating and lower VF, so circuit-level validation of reverse voltage margin and thermal performance is required before direct substitution.
Average Forward Current
High match
Package Type
High match
Repetitive Peak Reverse Voltage
Validation required
Forward Voltage Drop
Validation required
Parts at a glance
Part B
STPS20M120STN
STMicroelectronics
- Lifecycle
- Active
- Stock
- 5453 PCS
- Package
- TO-220-3
- Series
- Diodes - Rectifiers - Single
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | STPS20150CG | STPS20M120STN | Why it matters |
|---|---|---|---|
| Configuration | Common cathode (dual diode) | Single diode | Determines the circuit topology; a dual common-cathode device can replace two discretes in a center-tapped or parallel configuration, while a single diode requires an external second device. |
| Average Forward Current (IF(AV)) per device | 10 A per diode (20 A total) | 20 A | Sets the continuous current the diode can carry; the total current capability of the dual device matches the single device, but per-diode rating differs. |
| Repetitive Peak Reverse Voltage (VRRM) | 150 V | 120 V | Defines the maximum reverse voltage the diode can block; a higher VRRM provides more margin against voltage spikes and transients. |
| Forward Voltage (VF) at rated current | Approx. 0.75 V (typical at 10 A, 125 °C) | Approx. 0.65 V (typical at 20 A, 125 °C) | Lower forward voltage reduces conduction losses and improves efficiency; the difference affects thermal design and power dissipation. |
| Reverse Recovery Time (trr) | Not specified (Schottky, majority carrier) | Not specified (Schottky, majority carrier) | Both are Schottky diodes with negligible reverse recovery, making them suitable for high-frequency switching; no trr rating is needed. |
| Package | TO-247 (or TO-220AB depending on variant) | TO-220AB (or TO-247 depending on variant) | Package determines footprint, thermal resistance, and mounting style; physical interchangeability requires matching or compatible packages. |
| Operating Junction Temperature (Tj max) | 150 °C | 150 °C | Identical maximum junction temperature means both can operate in similar thermal environments without derating differences. |
| Reverse Leakage Current (IR) at rated VRRM | Typically 20 µA at 150 V, 125 °C | Typically 20 µA at 120 V, 125 °C | Leakage affects standby power and thermal stability; similar values indicate comparable off-state performance. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | STPS20150CG | STPS20M120STN |
|---|---|---|
| Supplier | STMicroelectronics | STMicroelectronics |
| Part Status | Obsolete | Obsolete |
| Diode Type | Schottky | Schottky |
| Voltage - DC Reverse (Vr) (Max) | 150 V | 120 V |
| Current - Average Rectified(Io) | - | 20A |
| Voltage - Forward (Vf) (Max) @ If | 920 mV @ 10 A | 840 mV @ 20 A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Current - Reverse Leakage @ Vr | 5 µA @ 150 V | 275 µA @ 120 V |
| Mounting Type | Surface Mount | Through Hole |
| Diode Configuration | 1 Pair Common Cathode | - |
| Current - Average Rectified(Io)(per Diode) | 10A | - |
| Operating Temperature - Junction | 175°C (Max) | - |
Frequently asked questions
What are the main differences between the STPS20150CG and STPS20M120STN?
The STPS20150CG is a 150 V, 10 A per diode (20 A total) dual center-tap Schottky rectifier in a D2PAK package, while the STPS20M120STN is a 120 V, 10 A per diode (20 A total) dual center-tap Schottky rectifier in a TO-220AB package. The STPS20150CG offers higher reverse voltage (150 V vs 120 V), whereas the STPS20M120STN provides a lower forward voltage drop typical of 120 V Schottky technology.
Can the STPS20150CG and STPS20M120STN be used interchangeably?
No, they are not direct drop-in replacements. The STPS20150CG comes in a surface-mount D2PAK package, while the STPS20M120STN uses a through-hole TO-220AB package. Additionally, their reverse voltage ratings differ (150 V vs 120 V), so circuit designers must verify voltage margin, thermal performance, and PCB footprint compatibility before considering substitution.
What is the repetitive peak reverse voltage (VRRM) for each device?
The STPS20150CG has a VRRM of 150 V. The STPS20M120STN has a VRRM of 120 V. These ratings define the maximum repetitive reverse voltage each diode can withstand and are key parameters for selecting the correct part for a given application.
What is the average forward current rating for these rectifiers?
Both the STPS20150CG and STPS20M120STN are rated for 20 A total average forward current (10 A per diode) when both diodes in the dual center-tap configuration are conducting. This rating is specified at a case temperature of 150 °C or lower, depending on the exact test conditions in the respective datasheets.
What package types do the STPS20150CG and STPS20M120STN use?
The STPS20150CG is housed in a D2PAK (TO-263) surface-mount package. The STPS20M120STN is housed in a TO-220AB through-hole package. This difference affects mounting method, thermal dissipation, and PCB layout requirements.
What are the typical forward voltage drops for these two Schottky rectifiers?
The STPS20150CG typically exhibits a forward voltage drop (VF) of approximately 0.75 V at 10 A and 25 °C. The STPS20M120STN typically exhibits a lower VF of approximately 0.65 V at 10 A and 25 °C, owing to its lower reverse voltage rating. Actual VF varies with current and junction temperature per the manufacturer datasheets.
Which applications are better suited for the STPS20150CG versus the STPS20M120STN?
The STPS20150CG is preferable in applications requiring higher reverse voltage blocking capability up to 150 V, such as certain industrial power supplies and high-voltage DC-DC converters, especially where surface-mount assembly is desired. The STPS20M120STN is well suited for lower-voltage (up to 120 V) high-efficiency rectification in through-hole designs, such as desktop PC power supplies and adapters, where lower forward voltage improves efficiency.
Do both devices share the same maximum operating junction temperature?
Yes, both the STPS20150CG and STPS20M120STN are rated for a maximum operating junction temperature (TJ) of 150 °C, as specified in their respective STMicroelectronics datasheets. This allows for consistent thermal design margins when comparing the two parts.