SC1914 (2SC1914) - NPN Silicon Transistor, 90V 50mA TO-92 | Mitsubishi | Small-Signal Amplifier
MPN: SC1914 β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| Contact us for volume pricing | ||
Drop-in alternatives for SC1914 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
2SC1914A
β Drop-Inπ Reference alternative (not in catalog)
2SC3199
β‘ Same Packageπ Reference alternative (not in catalog)
BF689
β‘ Same Packageπ Reference alternative (not in catalog)
BC135
β‘ Same Packageπ Reference alternative (not in catalog)
2SC5745
β‘ Same Packageπ Reference alternative (not in catalog)
SC1914 Maximum Ratings & Electrical Characteristics
| Type Designator | 2SC1914 (SC1914) |
| Polarity | NPN |
| Material | Silicon (Si) |
| Package | TO-92 |
| Maximum Collector Power Dissipation (Pc) | 0.2 W |
| Maximum Collector-Base Voltage (Vcb) | 90 V |
| Maximum Collector-Emitter Voltage (Vce) | 90 V |
| Collector Current (IC) | 0.05 A |
| Collector-Base Breakdown Voltage (BVcbo) | 90 V |
| Transition Frequency (fT) | 150 MHz |
| Device Configuration | 1-element, single transistor |
| Mounting | Through-hole |
SC1914 to-92 Pin Configuration Guide
Complete pinout information for SC1914 (to-92 package) with 3 pins. This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for SC1914.
Refer to the datasheet for full pin configuration.
Estimated pin count: 3 pins (power package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SC1914 is suitable for 6 applications: Vintage Audio Amplifier Repair, CRT-Era Consumer Electronics Servicing, Low-Current Signal Switching, Radio and RF Signal Stages, Test and Measurement Legacy Equipment, Educational and Prototype Breadboarding.
Vintage Audio Amplifier Repair
The 2SC1914's 90V collector-emitter rating and 150MHz transition frequency made it a common choice for preamplifier, tone-control, and driver stages in Japanese consumer audio equipment. When restoring vintage amplifiers and receivers, maintaining original-spec transistors preserves the designed bias points and gain structure; the 2SC1914A higher-voltage grade offers a same-family substitute where headroom above 90V is required.
Recommended
CRT-Era Consumer Electronics Servicing
Equipment with higher internal supply rails (video and CRT-era consumer products) required small-signal transistors rated above the common 50V class. The 2SC1914's 90V Vce and Vcb ratings fit these circuits. Technicians servicing legacy displays and video gear can use the 2SC1914A or verify functional equivalents such as BF689 after pinout confirmation.
Recommended
Low-Current Signal Switching
With a 50mA collector current limit and 0.2W dissipation ceiling, the 2SC1914 serves as a small-signal switch for relays, LED indicators, and signal-path gating in legacy control circuits. Its NPN configuration allows low-side drive from logic-level or analog control signals through a base resistor.
Recommended
Radio and RF Signal Stages
The 150MHz transition frequency supports moderate-frequency IF and RF amplifier roles in communications receivers and radios of the period. While not an RF-power device, the 2SC1914 suits low-level amplification ahead of mixers and detectors in vintage radio restoration projects.
Recommended
Test and Measurement Legacy Equipment
Older oscilloscopes, meters, and bench instruments frequently used high-voltage small-signal NPN transistors in input attenuators and vertical amplifier front ends. The 2SC1914's 90V ratings make it relevant for maintaining such instruments where modern 40-50V class devices would be over-stressed.
Recommended
Educational and Prototype Breadboarding
For studying classic bipolar transistor amplifier design, the 2SC1914 provides an authentic example of Japanese small-signal BJT practice: TO-92 package, 0.2W class dissipation, and straightforward common-emitter biasing. Educators and hobbyists restoring period kits benefit from original-spec devices over modern substitutes.
Recommended
Recommended Products Summary
Engineering reference data for SC1914 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 2SC1914A | BC135 | 2SC3199 |
|---|---|---|---|---|
| Package / Form Factor | TO-92 through-hole | TO-92 | TO-92 | TO-92 |
| Brand | Mitsubishi Electric | Mitsubishi Electric | Philips / NXP | Toshiba |
| Polarity / Material | NPN silicon | NPN silicon | NPN silicon | NPN silicon |
| Max Vce | 90 V | 120 V (V(BR)CEO per distributor data) | [DATA_NEEDED] | [DATA_NEEDED] |
| Max Collector Current | 0.05 A | 0.05 A | [DATA_NEEDED] | [DATA_NEEDED] |
| Power Dissipation | 0.2 W | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Transition Frequency (fT) | 150 MHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Lifecycle Status | Obsolete (surplus/specialist stock) | Obsolete (surplus/specialist stock) | Legacy | Active / widely available |
| Drop-in vs Functional | Reference part | Drop-in (same series/package) | Functional only - verify pinout | Functional only - verify pinout |
Key Differentiators
- 90V collector-base and collector-emitter ratings in a TO-92 small-signal package (vs 2SC3199)
- Same-series high-voltage upgrade path via 2SC1914A (120V V(BR)CEO per distributor parametric data) (vs 2SC1914 (base grade))
- 150MHz transition frequency (vs BC135)
- Authentic Mitsubishi part for vintage equipment restoration (vs 2SC5745 / BF689 functional substitutes)
Design Notes
Before substituting any equivalent (BC135, BF689, 2SC3199, 2SC5745) for the 2SC1914, verify the TO-92 pin order against both datasheets. Japanese 2SC TO-92 pin conventions frequently differ from European BC/BF-series pin order, and installing a substitute reversed destroys the device and can damage surrounding bias networks. Confirm with the original 3-page Mitsubishi datasheet archived on public datasheet repositories.
The 2SC1914's 0.2W maximum collector dissipation is an absolute rating; in enclosed vintage audio chassis where ambient temperatures can exceed 40C, derate substantially (a common service practice is to keep static dissipation below half the limit). For preamplifier stages biased at low collector currents this is not restrictive, but check driver stages that see higher Vce swings.
When replacing the obsolete 2SC1914 in repair work, prefer the same-series 2SC1914A (120V grade per distributor parametric data) for a same-package, same-family swap; if using cross-brand functional equivalents, re-verify DC bias point because hFE grouping may differ, shifting the operating point of direct-coupled stages.
Compliance Information
Obsolete Mitsubishi part predating modern compliance declarations; no RoHS/REACH/CE statements appear in the provided data. Verify compliance with the seller before procurement for new designs.
