BD681Alternatives & Equivalent Parts
About BD681
BD681 is a Integrated Circuit component manufactured by STMicroelectronics. It comes in a Transistor Outline, Vertical package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Get one quote covering all 6 alternatives for BD681 — response within 24 hours.
Specification Comparison
| Parameter | BD681Source | BD681G | WCR0805-27KFI | ATMEGA3208-AU | TPS54821RHLR | TPS2051BDBVR | ERJ-3RBD6810V |
|---|---|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | ON Semiconductor | WELWYN | Microchip | Texas Instruments | Texas Instruments | Panasonic |
| Package Type | Transistor Outline, Vertical | Transistor Outline, Vertical | Resistor Chip | Quad Flat Packages | Other | SOT23 (5-Pin) | Resistor Chip |
| Pin Count | 3 | 3 | 2 | 32 | 14 | 5 | 2 |
| Temperature Range | ~ 150.0°C | ~ 150.0°C | — | -40.0°C ~ 85.0°C | -40.0°C ~ 125.0°C | -40.0°C ~ 125.0°C | — |
| Price | $0.1590 | $0.3927 | $0.0130 | $1.2000 | $1.6177 | $0.2359 | $0.0129 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | — |
| Electrical Parameters | |||||||
| Factory Lead Time | 14 Weeks | 11 Weeks | — | 7 Weeks | — | — | — |
| YTEOL | 9 | 4 | — | 18 | 15 | 15 | — |
| Case Connection | ISOLATED | — | — | — | — | — | — |
| Collector Current-Max (IC) | 4 A | 4 A | — | — | — | — | — |
| Collector-Emitter Voltage-Max | 100 V | 100 V | — | — | — | — | — |
| Configuration | DARLINGTON WITH BUILT-IN DIODE AND RESISTOR | DARLINGTON WITH BUILT-IN DIODE AND RESISTOR | — | — | — | — | — |
| DC Current Gain-Min (hFE) | 750 | 750 | — | — | — | — | — |
| JEDEC-95 Code | TO-126 | TO-225AA | — | — | — | — | — |
| JESD-30 Code | R-PSFM-T3 | R-PSFM-T3 | — | S-PQFP-G32 | S-PQCC-N14 | R-PDSO-G5 | — |
| JESD-609 Code | e3 | e3 | — | e3 | e4 | e4 | — |
| Number of Elements | 1 | 1 | — | — | — | — | — |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | — |
| Package Shape | RECTANGULAR | RECTANGULAR | — | SQUARE | SQUARE | RECTANGULAR | — |
| Package Style | FLANGE MOUNT | FLANGE MOUNT | — | FLATPACK, THIN PROFILE | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH | — |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | — | — | 260 | 260 | 260 | — |
| Polarity/Channel Type | NPN | NPN | — | — | — | — | — |
| Power Dissipation Ambient-Max | 40 W | — | — | — | — | — | — |
| Power Dissipation-Max (Abs) | 40 W | 40 W | — | — | — | — | — |
| Qualification Status | Not Qualified | Not Qualified | — | — | — | Not Qualified | — |
| Surface Mount | NO | NO | — | YES | YES | YES | — |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) - annealed | — | Matte Tin (Sn) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | — |
| Terminal Form | THROUGH-HOLE | THROUGH-HOLE | — | GULL WING | NO LEAD | GULL WING | — |
| Terminal Position | SINGLE | SINGLE | — | QUAD | QUAD | DUAL | — |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | — | — | — | 30 | 30 | — |
| Transistor Application | SWITCHING | AMPLIFIER | — | — | — | — | — |
| Transistor Element Material | SILICON | SILICON | — | — | — | — | — |
| Transition Frequency-Nom (fT) | 10 MHz | — | — | — | — | — | — |
| VCEsat-Max | 2.5 V | — | — | — | — | — | — |
| ## BD681 Alternates Showing results | Image | — | — | — | — | — | — |
| Pbfree Code | — | Yes | — | — | Yes | Yes | — |
| Manufacturer Package Code | — | 77-09 | — | TQFP-32 | — | — | — |
| Date Of Intro | — | — | — | 2019-08-07 | — | — | — |
| Has ADC | — | — | — | YES | — | — | — |
| Additional Feature | — | — | — | ALSO OPERATES AT 1.8V MINIMUM SUPPLY AT 5MHZ | — | — | — |
| Bit Size | — | — | — | 8 | — | — | — |
| Boundary Scan | — | — | — | NO | — | — | — |
| CPU Family | — | — | — | AVR RISC | — | — | — |
| Clock Frequency-Max | — | — | — | 20 MHz | — | — | — |
| DAC Channels | — | — | — | NO | — | — | — |
| DMA Channels | — | — | — | NO | — | — | — |
| Format | — | — | — | FIXED POINT | — | — | — |
| Integrated Cache | — | — | — | NO | — | — | — |
| Low Power Mode | — | — | — | YES | — | — | — |
| Number of External Interrupts | — | — | — | 7 | — | — | — |
| Number of I/O Lines | — | — | — | 27 | — | — | — |
| Number of Serial I/Os | — | — | — | 3 | — | — | — |
| Number of Timers | — | — | — | 4 | — | — | — |
| On Chip Data RAM Width | — | — | — | 8 | — | — | — |
| On Chip Program ROM Width | — | — | — | 8 | — | — | — |
| PWM Channels | — | — | — | NO | — | — | — |
| Package Equivalence Code | — | — | — | TQFP32,.35SQ,32 | LCC14/18,.14SQ,20 | TSOP5/6,.11,37 | — |
| RAM (bytes) | — | — | — | 4096 | — | — | — |
| ROM (words) | — | — | — | 32768 | — | — | — |
| ROM Programmability | — | — | — | FLASH | — | — | — |
| Speed | — | — | — | 20 MHz | — | — | — |
| Supply Current-Max | — | — | — | 200 mA | — | — | — |
| Supply Voltage-Max | — | — | — | 5.5 V | — | — | — |
| Supply Voltage-Min | — | — | — | 5 V | — | — | — |
| Supply Voltage-Nom | — | — | — | 5 V | — | — | — |
| Technology | — | — | — | CMOS | — | — | — |
| Temperature Grade | — | — | — | INDUSTRIAL | AUTOMOTIVE | INDUSTRIAL | — |
| Terminal Pitch | — | — | — | 0.8 mm | 0.5 mm | 0.95 mm | — |
| uPs/uCs/Peripheral ICs Type | — | — | — | MICROCONTROLLER, RISC | — | — | — |
| ## ATMEGA3208-AU Alternates Showing results | — | — | — | Image | — | — | — |
| Analog IC - Other Type | — | — | — | — | SWITCHING REGULATOR | LOAD SWITCH | — |
| Control Mode | — | — | — | — | CURRENT-MODE | — | — |
| Control Technique | — | — | — | — | PULSE WIDTH MODULATION | — | — |
| Input Voltage-Max | — | — | — | — | 17 V | 5.5 V | — |
| Input Voltage-Min | — | — | — | — | 4.5 V | 2.7 V | — |
| Input Voltage-Nom | — | — | — | — | 12 V | — | — |
| Number of Functions | — | — | — | — | 1 | 1 | — |
| Number of Outputs | — | — | — | — | 1 | — | — |
| Output Current-Max | — | — | — | — | 8 A | — | — |
| Output Voltage-Max | — | — | — | — | 15 V | — | — |
| Output Voltage-Min | — | — | — | — | 0.6 V | — | — |
| Switcher Configuration | — | — | — | — | BUCK | — | — |
| Switching Frequency-Max | — | — | — | — | 1600 kHz | — | — |
| ## TPS54821RHLR Alternates Showing results | — | — | — | — | Image | — | — |
| Adjustable Threshold | — | — | — | — | — | NO | — |
| Number of Channels | — | — | — | — | — | 1 | — |
| Supply Current-Max (Isup) | — | — | — | — | — | 0.07 mA | — |
| Supply Voltage-Max (Vsup) | — | — | — | — | — | 5.5 V | — |
| Supply Voltage-Min (Vsup) | — | — | — | — | — | 2.7 V | — |
| Supply Voltage-Nom (Vsup) | — | — | — | — | — | 3.3 V | — |
| ## TPS2051BDBVR Alternates Showing results | — | — | — | — | — | Image | — |
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 6 alternatives for BD681 — response within 24 hours.
Quick Links
Rochester Electronics LLC 4A, 100V, NPN, Si, POWER TRANSISTOR, TO-225AA, ROHS COMPLIANT, PLASTIC, CASE 77-09, 3 PIN
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Why Look for Alternatives?
Finding alternatives for BD681 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 BD681 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.
Can't Find What You Need?
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FAQ
What is equivalent to BD681?
Known equivalents for BD681 include BD681G, WCR0805-27KFI, ATMEGA3208-AU. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of BD681?
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 BD681 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.