BD646Alternatives & Equivalent Parts
About BD646
BD646 is a Transistor BJT PNP component manufactured by Bourns. 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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Specification Comparison
| Parameter | BD646Source | UA723CN | SMBJ58CA | LM2575-5.0WU | SN74LVC2G132DCUR |
|---|---|---|---|---|---|
| Manufacturer | Bourns | Texas Instruments | LITTELFUSE | Microchip | Texas Instruments |
| Package Type | Transistor Outline, Vertical | Dual-In-Line Packages | Diodes Moulded Non Polarised | Other | — |
| Pin Count | 3 | 14 | 2 | 5 | — |
| Temperature Range | — | ~ 70.0°C | -65.0°C ~ 150.0°C | -40.0°C ~ 85.0°C | — |
| Price | — | $0.4687 | $0.0203 | $1.2800 | $0.1224 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | OBSOLETE | ACTIVE | TRANSFERRED | ACTIVE | — |
| Electrical Parameters | |||||
| YTEOL | 0 | 15 | 7 | 7 | — |
| Case Connection | COLLECTOR | — | — | — | — |
| Collector Current-Max (IC) | 8 A | — | — | — | — |
| Collector-Emitter Voltage-Max | 60 V | — | — | — | — |
| Configuration | DARLINGTON | — | SINGLE | — | — |
| DC Current Gain-Min (hFE) | 750 | — | — | — | — |
| JEDEC-95 Code | TO-220AB | — | DO-214AA | — | — |
| JESD-30 Code | R-PSFM-T3 | R-PDIP-T14 | R-PDSO-C2 | R-PSSO-G5 | — |
| Number of Elements | 1 | — | 1 | — | — |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | — |
| Package Shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | — |
| Package Style | FLANGE MOUNT | IN-LINE | SMALL OUTLINE | SMALL OUTLINE | — |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | — | 260 | 245 | — |
| Polarity/Channel Type | PNP | — | — | — | — |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified | Not Qualified | — |
| Surface Mount | NO | NO | YES | YES | — |
| Terminal Form | THROUGH-HOLE | THROUGH-HOLE | C BEND | GULL WING | — |
| Terminal Position | SINGLE | DUAL | DUAL | SINGLE | — |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | — | 40 | — | — |
| Transistor Element Material | SILICON | — | — | — | — |
| Pbfree Code | — | Yes | No | — | — |
| Analog IC - Other Type | — | THREE TERMINAL VOLTAGE REFERENCE | — | SWITCHING REGULATOR | — |
| Input Voltage-Max | — | 40 V | — | 40 V | — |
| Input Voltage-Min | — | 9.5 V | — | 4 V | — |
| JESD-609 Code | — | e4 | e3 | e3 | — |
| Number of Functions | — | 1 | — | 1 | — |
| Number of Outputs | — | 1 | — | — | — |
| Output Current-Max | — | 0.15 A | — | 1 A | — |
| Output Voltage-Max | — | 37 V | — | 5.25 V | — |
| Output Voltage-Min | — | 2 V | — | 4.75 V | — |
| Output Voltage-Nom | — | 7.15 V | — | 5 V | — |
| Package Equivalence Code | — | DIP14,.3 | — | SMSIP5H,.6,67TB | — |
| Ripple Voltage (Main Out) | — | 0.00002 Vrms | — | — | — |
| Supply Voltage-Max (Vsup) | — | 40 V | — | — | — |
| Supply Voltage-Min (Vsup) | — | 9.5 V | — | — | — |
| Supply Voltage-Nom (Vsup) | — | 12 V | — | — | — |
| Technology | — | BIPOLAR | AVALANCHE | — | — |
| Temperature Grade | — | COMMERCIAL | — | INDUSTRIAL | — |
| Terminal Finish | — | Nickel/Palladium/Gold (Ni/Pd/Au) | Matte Tin (Sn) | Matte Tin (Sn) | — |
| Terminal Pitch | — | 2.54 mm | — | 1.7 mm | — |
| Trim/Adjustable Output | — | YES | — | — | — |
| ## UA723CN Alternates Showing results | — | Image | — | — | — |
| Additional Feature | — | — | EXCELLENT CLAMPING CAPABILITY | — | — |
| Breakdown Voltage-Max | — | — | 71.2 V | — | — |
| Breakdown Voltage-Min | — | — | 64.4 V | — | — |
| Breakdown Voltage-Nom | — | — | 67.8 V | — | — |
| Clamping Voltage-Max | — | — | 93.6 V | — | — |
| Diode Element Material | — | — | SILICON | — | — |
| Diode Type | — | — | TRANS VOLTAGE SUPPRESSOR DIODE | — | — |
| Non-rep Peak Rev Power Dis-Max | — | — | 600 W | — | — |
| Polarity | — | — | BIDIRECTIONAL | — | — |
| Power Dissipation-Max | — | — | 5 W | — | — |
| Reference Standard | — | — | IEC-61000-4-2, 4-4; UL RECOGNIZED | — | — |
| Rep Pk Reverse Voltage-Max | — | — | 58 V | — | — |
| Reverse Current-Max | — | — | 1 µ A | — | — |
| Reverse Test Voltage | — | — | 58 V | — | — |
| Manufacturer Package Code | — | — | — | DDPAK-5 | — |
| Control Mode | — | — | — | VOLTAGE-MODE | — |
| Control Technique | — | — | — | PULSE WIDTH MODULATION | — |
| Input Voltage-Nom | — | — | — | 12 V | — |
| Switcher Configuration | — | — | — | BUCK | — |
| Switching Frequency-Max | — | — | — | 63 kHz | — |
| ## LM2575-5.0WU 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 4 alternatives for BD646 — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for BD646 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 BD646 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 BD646?
Known equivalents for BD646 include UA723CN, SMBJ58CA, LM2575-5.0WU. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of BD646?
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 BD646 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.