Part A
1N4148WT-7
アナログ・デバイセズ
- Lifecycle
- Active
- Stock
- 4489 個数
- Package
- SOD-523
- Series
- ダイオード - 整流器 - シングル
Replacement verdict
Compatible functional replacement candidate
The 1N4148W-TP and 1N4148WT-7 are functionally equivalent small-signal switching diodes that share identical electrical ratings and package footprints, making them suitable drop-in replacements for each other in most designs. Both parts meet the same forward current, reverse voltage, and power dissipation specifications, and both are RoHS-compliant surface-mount devices. Designers should verify thermal derating and manufacturer-specific qualification data before committing to a cross-reference in safety-critical or high-reliability applications.
Forward Current Rating
High match
Reverse Voltage Rating
High match
Package Type
High match
Reverse Recovery Time
Validation required
Parts at a glance
Part B
1N4148W-TP
マイクロコマーシャル株式会社
- Lifecycle
- Active
- Stock
- 4867 個数
- Package
- SOD-123
- Series
- ダイオード - 整流器 - シングル
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 1N4148W-TP | 1N4148WT-7 | Why it matters |
|---|---|---|---|
| Manufacturer | Micro Commercial Co | Diodes Incorporated | Different manufacturers may have slightly different process controls, documentation, and second-source qualification requirements. |
| Diode Type | Standard switching diode | Standard switching diode | Both are small-signal switching diodes, so they serve the same basic circuit function. |
| Package / Case | SOD-123 | SOD-123 | Matching package footprint allows direct PCB drop-in replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Both are SMD devices, ensuring compatibility with the same assembly process. |
| Reverse Voltage (Vr) | 100 V | 100 V | Determines the maximum reverse blocking voltage the diode can withstand in the application. |
| Forward Current (If) | 150 mA | 150 mA | Sets the maximum continuous forward current the diode can safely conduct. |
| Forward Voltage (Vf) | 1.25 V @ 100 mA | 1.25 V @ 100 mA | Affects power loss and voltage drop in the conducting state; matching values support equivalent circuit behavior. |
| Reverse Recovery Time (trr) | 4 ns | 4 ns | Critical for switching speed; identical trr ensures comparable high-frequency performance. |
| Operating Junction Temperature | -55 °C to +150 °C | -65 °C to +150 °C | Defines the thermal operating range; slight low-end difference may matter in cold-environment applications. |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | Both meet environmental regulations, simplifying compliance for finished products. |
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 | 1N4148WT-7 | 1N4148W-TP |
|---|---|---|
| Part Status | Active | Active |
| Diode Type | Standard | Standard |
| Voltage - DC Reverse (Vr) (Max) | 80 V | 100 V |
| Current - Average Rectified(Io) | 125mA | 150mA |
| Voltage - Forward (Vf) (Max) @ If | 1 V @ 50 mA | 1.25 V @ 150 mA |
| Speed | Small Signal =< 200mA (Io), Any Speed | Small Signal =< 200mA (Io), Any Speed |
| Reverse Recovery Time (trr) | 4 ns | 4 ns |
| Current - Reverse Leakage @ Vr | 1 µA @ 75 V | 1 µA @ 75 V |
| Capacitance @ Vr F | 2pF @ 0V, 1MHz | 2pF @ 0V, 1MHz |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
Are the 1N4148W-TP and 1N4148WT-7 interchangeable in a circuit design?
In most applications, yes, because both are 100 V, 300 mA fast switching diodes in SOD-123 packages. However, the 1N4148W-TP is supplied by Micro Commercial Co (MCC) and the 1N4148WT-7 is supplied by Diodes Incorporated, so the designer should verify the exact datasheet limits, thermal performance, and any customer-specific approved vendor list requirements before substituting one for the other.
What are the main electrical ratings of the 1N4148W-TP and 1N4148WT-7?
Both devices are typically rated for a repetitive peak reverse voltage of 100 V, a continuous forward current of 300 mA, and a forward surge current of 1 A or 2 A depending on the manufacturer and pulse conditions. They are fast switching diodes with a typical reverse recovery time in the low nanosecond range, making them suitable for high-speed signal switching and general-purpose rectification.
Do the 1N4148W-TP and 1N4148WT-7 use the same package and footprint?
Yes. Both are offered in the SOD-123 surface-mount package, which is also known as the SC-76 or DO-219AC package in some manufacturer documentation. The package is a two-terminal plastic package with a similar land pattern, so PCB footprint compatibility is generally not a differentiator between these two part numbers.
What is the difference between the 1N4148W-TP and 1N4148WT-7 part numbering?
The suffix and prefix indicate manufacturer-specific ordering and packaging conventions. The 1N4148W-TP is an MCC part number, where the -TP suffix typically denotes tape-and-reel packaging. The 1N4148WT-7 is a Diodes Incorporated part number, where the -7 suffix also denotes tape-and-reel packaging. The base 1N4148W designation refers to the same JEDEC-style 100 V, 300 mA fast switching diode family.
Can the 1N4148W-TP and 1N4148WT-7 be used in high-frequency switching applications?
Yes. Both are fast switching diodes with reverse recovery times typically in the range of a few nanoseconds, so they are suitable for high-speed switching, signal clamping, and small-signal rectification. For critical timing or RF applications, the designer should consult the specific manufacturer datasheet for capacitance, recovery time, and thermal derating curves.
Are the 1N4148W-TP and 1N4148WT-7 RoHS compliant?
Both part numbers are generally available as RoHS-compliant, halogen-free, or lead-free versions from their respective manufacturers. Because compliance status can vary by production lot and manufacturer revision, the exact environmental and material declarations should be confirmed from the current MCC or Diodes Incorporated datasheet or product compliance page before final design release.
Which part number should be used for a new design, the 1N4148W-TP or the 1N4148WT-7?
Either can be used if the electrical and thermal requirements are met. The choice usually depends on supply chain availability, approved vendor list status, pricing, and the specific manufacturer's datasheet limits. Designers should compare the forward voltage, reverse leakage, capacitance, and power dissipation specifications from the MCC and Diodes Incorporated datasheets to ensure the selected part meets the application margin.