My Inquiry
My Account
onsemi 2SA1774G
- Part No.:
- 2SA1774G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
2SA1774G.pdf
- Description:
- TRANS PNP 50V 0.1A SC75 SOT416
- Quantity:
- Payment:
- Shipping:
Inventory:6,158
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
2SA1774G from onsemi is a PNP silicon general-purpose amplifier transistor in SC−75/SOT−416 package, rated for −50 V V(BR)CEO, −100 mA IC, 150 mW PD, and 140 MHz fT. It delivers high DC current gain (hFE = 120–560), low saturation voltage (VCE(sat) ≤ −0.5 V at IC = −50 mA), and operates across −55°C to +150°C junction temperature range. Used in compact audio preamplifiers and signal conditioning stages where board space and thermal efficiency are critical.
For engineers reviewing the 2SA1774G datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, SC−75 footprint compatibility, VCE(sat) performance under pulsed drive, hFE consistency across temperature, and AEC−Q101 qualification status for automotive-grade reliability validation.
Technical Context
This device functions as a discrete PNP bipolar junction transistor optimized for linear amplification in low-power analog signal paths. Its design emphasizes stable hFE over temperature (120–560 at TA = 25°C, VCE = −6 V, IC = −1.0 mA) and low output capacitance (COB = 3.5 pF at VCB = −12 V), supporting bandwidth-critical small-signal stages.
The SC−75 package enables surface-mount integration with minimal thermal resistance (θJA ≈ 380°C/W on FR−4), while the −50 V V(BR)CEO and −60 V V(BR)CBO ratings support operation in moderate-voltage bias networks. It is not a switching-optimized device but exhibits usable fT = 140 MHz under specified test conditions (VCE = −12 V, IC = −2.0 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)CEO | −50 V - Maximum collector-emitter blocking voltage before breakdown; sets upper limit for supply rail headroom in amplifier biasing. |
| IC (max) | −100 mA - Continuous collector current rating; defines maximum linear output swing capability before thermal derating. |
| PD (max) | 150 mW - Power dissipation limit on FR−4 PCB; constrains usable I2R and V×I operating points in ambient conditions. |
| hFE | 120–560 - DC current gain range at VCE = −6 V, IC = −1.0 mA; determines base drive requirements and gain stability in CE configurations. |
| fT | 140 MHz (typ) - Transition frequency at VCE = −12 V, IC = −2.0 mA; indicates usable bandwidth for small-signal amplification up to ~10–20 MHz. |
| VCE(sat) | ≤ −0.5 V - Saturation voltage at IC = −50 mA, IB = −5.0 mA; impacts minimum voltage drop in active-load or emitter-follower output stages. |
| COB | 3.5 pF (typ) - Collector-base output capacitance at VCB = −12 V; limits high-frequency gain roll-off and affects stability in tuned circuits. |
Pinout & Package
2SA1774G is housed in the SC−75/SOT−416 package (Case 463, Style 1), measuring 1.60 × 0.80 × 0.80 mm with 1.00 mm lead pitch. This ultra-compact 3-pin surface-mount outline supports high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode for forward-active bias; requires current-limited drive to maintain hFE linearity and avoid thermal runaway. |
| 2 | Emitter | Current source terminal in PNP configuration; connected to higher potential rail in common-emitter amplifier topologies. |
| 3 | Collector | Output current sink terminal; carries amplified load current and interfaces with pull-up resistors or active loads. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE range | 120–560 ensures predictable base drive sizing and stable gain across production lots and temperature extremes. |
| Low VCE(sat) | ≤ −0.5 V at IC = −50 mA minimizes voltage overhead in emitter-follower buffers and improves power efficiency in low-voltage rails. |
| AEC−Q101 qualified | S2SA1774G variant meets automotive stress testing standards; 2SA1774G shares identical die and package, enabling qualification traceability. |
| Pb-free, RoHS compliant | Meets global environmental compliance mandates without derating; "G" suffix confirms halogen-free/BFR-free construction. |
| SC−75 footprint | 1.60 × 0.80 mm outline reduces PCB area by >60% vs. SOT−23, enabling miniaturized portable and wearable signal chains. |
Applications
| Audio Preamp Stage | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Low-noise voltage amplification of microphone or piezoelectric sensor outputs in battery-powered voice recorders. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter degeneration for gain stability. Use Value: High hFE (120–560) enables single-stage gain ≥100 with minimal base current draw; low VCE(sat) preserves headroom on 3.3 V supplies. | Use Scenario: Amplifying millivolt-level signals from NTC thermistors or Hall-effect position sensors in engine control modules. IC Role / Device Role / Timing Role: Linear transconductance amplifier interfacing between passive sensor and ADC input. Use Value: AEC−Q101 qualification (via S2SA1774G lineage) validates reliability under automotive thermal cycling; −55°C to +150°C Tstg supports under-hood deployment. |
| Portable Medical Pulse Oximeter Front-End | Industrial Current Loop Receiver |
Use Scenario: Transimpedance and gain stages for photodiode current signals in compact wearable health monitors. IC Role / Device Role / Timing Role: Low-capacitance (COB = 3.5 pF) PNP amplifier minimizing phase shift in feedback networks. Use Value: 140 MHz fT supports clean amplification of 10–20 Hz pulse harmonics without slew-induced distortion; SC−75 size fits tight optical module footprints. | Use Scenario: Converting 4–20 mA loop current into calibrated voltage for PLC analog inputs in factory automation systems. IC Role / Device Role / Timing Role: Precision current-to-voltage converter using emitter-degenerated PNP topology for linearity. Use Value: Tight V(BR)CEO (−50 V) and V(BR)CBO (−60 V) allow safe operation with 24 V loop supplies and transient protection; 150 mW PD supports continuous 20 mA dissipation with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SA1037AK | Higher hFE (200–600), same SC−75 package, −50 V V(BR)CEO, but fT = 180 MHz (vs. 140 MHz). | Better suited for higher-bandwidth preamps; slightly tighter hFE binning may reduce calibration effort. | Select when >100 MHz small-signal bandwidth is required and tighter hFE distribution is beneficial. |
| MMBT4403 | Same −40 V V(BR)CEO, −600 mA IC, SOT−23 package (larger than SC−75), hFE = 100–300, fT = 200 MHz. | Higher current capability but larger footprint; lower hFE range increases base drive sensitivity. | Choose when higher output current or legacy SOT−23 layout compatibility is prioritized over miniaturization. |
Compared with 2SA1774G, the 2SA1037AK offers higher bandwidth and tighter hFE spread for precision analog front-ends, while the MMBT4403 trades SC−75 miniaturization for greater current drive and wider availability in standard SOT−23 footprints-neither is pin-compatible, requiring layout revision.
Availability
2SA1774G is available at Aetrix Electronics and suitable for audio preamplifiers, automotive sensor interfaces, and portable medical instrumentation requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 2SA1774G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 2SA1774G belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliable, cost-effective amplification in space-constrained analog signal chains across consumer, industrial, and automotive segments.
FAQ
What is the maximum operating junction temperature for the 2SA1774G?
The 2SA1774G has a maximum junction temperature (TJ) rating of +150°C, verified per onsemi's thermal characterization on FR−4 PCBs. This allows sustained operation in high-ambient environments such as automotive engine compartments or enclosed industrial enclosures, provided PCB copper area and airflow meet the 380°C/W θJA specification. Derating begins above +25°C ambient per the datasheet thermal curves.
Is the 2SA1774G pin-compatible with the S2SA1774G?
Yes, the 2SA1774G and S2SA1774G share identical SC−75 package dimensions, pinout (Base–Emitter–Collector on pins 1–2–3), and die design. The S2SA1774G adds automotive-specific traceability and PPAP documentation, but electrical and mechanical specifications-including all maximum ratings and electrical characteristics-are fully aligned with the 2SA1774G.
Does the 2SA1774G support AEC−Q101 qualification?
The 2SA1774G itself is not individually AEC−Q101 certified; however, the S2SA1774G variant-identical in die, package, and marking except for the 'S' prefix-is explicitly AEC−Q101 qualified and PPAP capable. Designers targeting automotive applications should specify S2SA1774G, though 2SA1774G may be used in non-automotive contexts where qualification is not mandated.
What does the 'G' suffix indicate in 2SA1774G?
The 'G' suffix in 2SA1774G denotes onsemi's Pb-free, halogen-free/BFR-free packaging per RoHS Directive 2011/65/EU. It confirms compliance with environmental regulations and indicates use of matte tin lead finish. The 'G' does not imply automotive qualification-only the 'S' prefix (as in S2SA1774G) conveys AEC−Q101 status.
Can the 2SA1774G be used in switching applications?
The 2SA1774G is characterized and optimized for linear amplifier operation-not switching. While it can saturate (VCE(sat) ≤ −0.5 V), its fT = 140 MHz and lack of specified switching times (ton/toff, tfall/trise) mean performance in digital or PWM roles is unvalidated. For switching, onsemi recommends dedicated devices like the NSS12201MR6T1G (PNP SOT−23) with guaranteed transition metrics.
2SA1774G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-75, SOT-416
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 120 @ 1mA, 6V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 140MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75, SOT-416
2SA1774G FAQ
1.How can I place an order for 2SA1774G through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SA1774G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 2SA1774G reliable?
The price and inventory of 2SA1774G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1774G is usually 5 days.
3.What payment methods are accepted for 2SA1774G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1774G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SA1774G?
2SA1774G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SA1774G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 2SA1774G?
For technical support, including 2SA1774G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1774G requirements.
6.How does Aetrix verify that 2SA1774G is sourced from the original manufacturer or authorized distributors?
All 2SA1774G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SA1774G meets industry standards.
7.What is the process for return or replacement of 2SA1774G?
All 2SA1774G units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1774G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 2SA1774G part is unused and in its original packaging.
Return procedure for 2SA1774G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
2SA1774G Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
