2SD1781KT146RAlternatives & Equivalent Parts
About 2SD1781KT146R
2SD1781KT146R is a Transistor BJT NPN component manufactured by ROHM Semiconductor. It comes in a SOT23 (3-Pin) package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | 2SD1781KT146RSource | SMLE13BC8TT86 | 2SC4097T106Q | 2SC5103TLQ |
|---|---|---|---|---|
| Manufacturer | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Package Type | SOT23 (3-Pin) | LEDs Chip | Other | Other |
| Pin Count | 3 | 2 | 3 | 3 |
| Temperature Range | ~ 150.0°C | -40.0°C ~ 85.0°C | ~ 150.0°C | ~ 150.0°C |
| Price | $0.0461 | $0.3880 | $0.0661 | $0.4450 |
| Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | OBSOLETE | ACTIVE | NOT RECOMMENDED |
| Electrical Parameters | ||||
| Pbfree Code | Yes | Yes | Yes | Yes |
| Factory Lead Time | 23 Weeks | — | 23 Weeks | — |
| YTEOL | 7 | 0 | 7 | 3 |
| Collector Current-Max (IC) | 0.8 A | — | 0.5 A | 5 A |
| Collector-Emitter Voltage-Max | 32 V | — | 32 V | 60 V |
| Configuration | SINGLE | SINGLE | SINGLE | SINGLE |
| DC Current Gain-Min (hFE) | 180 | — | 120 | 120 |
| JESD-30 Code | R-PDSO-G3 | — | R-PDSO-G3 | R-PSSO-G2 |
| JESD-609 Code | e1 | e4 | e1 | e2 |
| Number of Elements | 1 | — | 1 | 1 |
| Package Body Material | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR | — | RECTANGULAR | RECTANGULAR |
| Package Style | SMALL OUTLINE | — | SMALL OUTLINE | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 | — | 260 | 260 |
| Polarity/Channel Type | NPN | — | NPN | NPN |
| Power Dissipation-Max (Abs) | 0.2 W | — | 0.2 W | 10 W |
| Qualification Status | Not Qualified | — | Not Qualified | Not Qualified |
| Surface Mount | YES | YES | YES | YES |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) | Gold (Au) - with Nickel (Ni) barrier | Tin/Silver/Copper (Sn/Ag/Cu) | Tin/Copper (Sn98Cu2) |
| Terminal Form | GULL WING | — | GULL WING | GULL WING |
| Terminal Position | DUAL | — | DUAL | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 10 | — | 10 | 10 |
| Transistor Application | AMPLIFIER | — | AMPLIFIER | SWITCHING |
| Transistor Element Material | SILICON | — | SILICON | SILICON |
| Transition Frequency-Nom (fT) | 150 MHz | — | 250 MHz | 120 MHz |
| VCEsat-Max | 0.4 V | — | 0.4 V | — |
| Additional Feature | — | HIGH RELIABILITY | — | — |
| Color | — | BLUE | — | — |
| Forward Current-Max | — | 0.02 A | — | — |
| Lens Type | — | COLORLESS TRANSPARENT | — | — |
| Luminous Intensity-Nom | — | 40.0 mcd | — | — |
| Mounting Feature | — | SURFACE MOUNT | — | — |
| Number of Functions | — | 1 | — | — |
| Optoelectronic Device Type | — | SINGLE COLOR LED | — | — |
| Overall Height | — | 0.36 mm | — | — |
| Packing Method | — | TR, 7 INCH | — | — |
| Shape | — | RECTANGULAR | — | — |
| Size | — | 1.2 mm | — | — |
| Terminal Pitch | — | 1.65 mm | — | — |
| Reach Compliance Code | — | — | Compliant | — |
| Case Connection | — | — | — | COLLECTOR |
| Turn-off Time-Max (toff) | — | — | — | 1800 ns |
| Turn-on Time-Max (ton) | — | — | — | 300 ns |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 3 alternatives for 2SD1781KT146R — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for 2SD1781KT146R is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating 2SD1781KT146R replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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FAQ
What is equivalent to 2SD1781KT146R?
Known equivalents for 2SD1781KT146R include SMLE13BC8TT86, 2SC4097T106Q, 2SC5103TLQ. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of 2SD1781KT146R?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify 2SD1781KT146R alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.