BC557BAlternatives & Equivalent Parts
About BC557B
BC557B is a Transistor BJT PNP component manufactured by MULTICOMP. 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 | BC557BSource | CSD17571Q2 | CSD16301Q2 | LM319N | BC557 | RC0603FR-0730KL |
|---|---|---|---|---|---|---|
| Manufacturer | MULTICOMP | Texas Instruments | Texas Instruments | Texas Instruments | ON Semiconductor | YAGEO (PHYCOMP) |
| Package Type | Transistor Outline, Vertical | Other | Other | Dual-In-Line Packages | Other | Resistor Chip |
| Pin Count | 3 | 8 | 6 | 14 | 3 | 2 |
| Temperature Range | — | -55.0°C ~ 150.0°C | -55.0°C ~ 150.0°C | ~ 70.0°C | ~ 150.0°C | -55.0°C ~ 155.0°C |
| Price | $0.0173 | $0.1180 | $0.1144 | $0.2100 | $0.0411 | $0.0007 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | — | ACTIVE | ACTIVE | ACTIVE | OBSOLETE | ACTIVE |
| Electrical Parameters | ||||||
| Pbfree Code | — | Yes | Yes | — | No | Yes |
| YTEOL | — | 15 | 15 | 0 | 0 | 13 |
| Additional Feature | — | AVALANCHE RATED | — | — | — | LASER TRIMMABLE |
| Avalanche Energy Rating (Eas) | — | 7.2 mJ | 10 mJ | — | — | — |
| Case Connection | — | DRAIN | DRAIN | — | — | — |
| Configuration | — | SINGLE WITH BUILT-IN DIODE | SINGLE | — | SINGLE | — |
| DS Breakdown Voltage-Min | — | 30 V | 25 V | — | — | — |
| Drain Current-Max (ID) | — | 7.6 A | 5 A | — | — | — |
| Drain-source On Resistance-Max | — | 0.029 Ω | 0.034 Ω | — | — | — |
| FET Technology | — | METAL-OXIDE SEMICONDUCTOR | METAL-OXIDE SEMICONDUCTOR | — | — | — |
| Feedback Cap-Max (Crss) | — | 12 pF | 17 pF | — | — | — |
| JESD-30 Code | — | R-PDSO-N8 | R-PDSO-N6 | R-PDIP-T14 | O-PBCY-T3 | — |
| JESD-609 Code | — | e4 | e4 | e4 | e0 | e3 |
| Number of Elements | — | 1 | 1 | — | 1 | — |
| Operating Mode | — | ENHANCEMENT MODE | ENHANCEMENT MODE | — | — | — |
| Package Body Material | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | — |
| Package Shape | — | RECTANGULAR | RECTANGULAR | RECTANGULAR | ROUND | — |
| Package Style | — | SMALL OUTLINE | SMALL OUTLINE | IN-LINE | CYLINDRICAL | SMT |
| Peak Reflow Temperature (Cel) | — | 260 | 260 | — | 235 | — |
| Polarity/Channel Type | — | N-CHANNEL | N-CHANNEL | — | PNP | — |
| Power Dissipation-Max (Abs) | — | 2.5 W | 2.3 W | — | 0.625 W | — |
| Pulsed Drain Current-Max (IDM) | — | 39 A | 20 A | — | — | — |
| Surface Mount | — | YES | YES | NO | NO | YES |
| Terminal Finish | — | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | NICKEL PALLADIUM GOLD | TIN LEAD | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Form | — | NO LEAD | NO LEAD | THROUGH-HOLE | THROUGH-HOLE | — |
| Terminal Position | — | DUAL | DUAL | DUAL | BOTTOM | — |
| Time@Peak Reflow Temperature-Max (s) | — | 30 | 30 | — | — | — |
| Transistor Application | — | SWITCHING | SWITCHING | — | AMPLIFIER | — |
| Transistor Element Material | — | SILICON | SILICON | — | SILICON | — |
| Qualification Status | — | — | Not Qualified | Not Qualified | Not Qualified | — |
| Amplifier Type | — | — | — | COMPARATOR | — | — |
| Average Bias Current-Max (IIB) | — | — | — | 0.0012 µA | — | — |
| Bias Current-Max (IIB) @25C | — | — | — | 1 µA | — | — |
| Input Offset Voltage-Max | — | — | — | 10000 µV | — | — |
| Neg Supply Voltage Limit-Max | — | — | — | -25 V | — | — |
| Neg Supply Voltage-Nom (Vsup) | — | — | — | -15 V | — | — |
| Number of Functions | — | — | — | 2 | — | — |
| Output Type | — | — | — | OPEN-COLLECTOR | — | — |
| Package Equivalence Code | — | — | — | DIP14,.3 | — | — |
| Response Time-Nom | — | — | — | 80 ns | — | — |
| Supply Current-Max | — | — | — | 12.5 mA | — | — |
| Supply Voltage Limit-Max | — | — | — | 18 V | — | — |
| Supply Voltage-Nom (Vsup) | — | — | — | 15 V | — | — |
| Technology | — | — | — | BIPOLAR | — | METAL GLAZE/THICK FILM |
| Temperature Grade | — | — | — | COMMERCIAL | — | — |
| Terminal Pitch | — | — | — | 2.54 mm | — | — |
| ## LM319N Alternates Showing results | — | — | — | Image | — | — |
| Manufacturer Package Code | — | — | — | — | 29-11 | — |
| Collector Current-Max (IC) | — | — | — | — | 0.1 A | — |
| Collector-Emitter Voltage-Max | — | — | — | — | 45 V | — |
| DC Current Gain-Min (hFE) | — | — | — | — | 120 | — |
| JEDEC-95 Code | — | — | — | — | TO-92 | — |
| Transition Frequency-Nom (fT) | — | — | — | — | 320 MHz | — |
| Reach Compliance Code | — | — | — | — | — | Compliant |
| Construction | — | — | — | — | — | Rectangular |
| Mounting Feature | — | — | — | — | — | SURFACE MOUNT |
| Package Height | — | — | — | — | — | 0.45 mm |
| Package Length | — | — | — | — | — | 1.6 mm |
| Package Width | — | — | — | — | — | 0.8 mm |
| Packing Method | — | — | — | — | — | TR, PAPER, 7 INCH |
| Rated Power Dissipation (P) | — | — | — | — | — | 0.1 W |
| Rated Temperature | — | — | — | — | — | 70 °C |
| Resistance | — | — | — | — | — | 30000 Ω |
| Resistor Type | — | — | — | — | — | FIXED RESISTOR |
| Size Code | — | — | — | — | — | 0603 |
| Temperature Coefficient | — | — | — | — | — | 100 ppm/°C |
| Terminal Shape | — | — | — | — | — | WRAPAROUND |
| Tolerance | — | — | — | — | — | 1% |
| Working Voltage | — | — | — | — | — | 75 V |
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 5 alternatives for BC557B — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for BC557B 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 BC557B 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 BC557B?
Known equivalents for BC557B include CSD17571Q2, CSD16301Q2, LM319N. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of BC557B?
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 BC557B 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.