My Inquiry
My Account
onsemi KSD1616YTA
- Part No.:
- KSD1616YTA
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
KSD1616YTA.pdf
- Description:
- TRANS NPN 50V 1A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,293
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
KSD1616YTA from Fairchild Semiconductor is an NPN bipolar junction transistor (BJT) designed for audio-frequency power amplification and medium-speed switching applications. It features a DC current gain (hFE1) of 135–270 at VCE=2V and IC=100mA, collector-emitter saturation voltage (VCE(sat)) ≤0.3V at IC=1A/IB=50mA, and fT ≥100MHz. It is commonly used in low-power audio output stages and relay drivers.
For engineers reviewing the KSD1616YTA datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 package compatibility, complementary pairing with KSB1116/1116A, safe operating area under pulsed conditions, and thermal derating behavior up to 150°C junction temperature.
Technical Context
The KSD1616YTA operates as a general-purpose NPN BJT with optimized gain-bandwidth trade-off for audio amplification and switching. Its hFE classification "Y" denotes 135–270 gain range, and it supports pulse collector current up to 2A (PW≤10ms, duty <50%).
It exhibits low VCE(sat) and VBE(sat) values-0.15–0.3V and 0.9–1.2V respectively-at IC=1A/IB=50mA-enabling efficient switching in linear and saturated modes. Its Cob = 19pF and fT = 100–160MHz support stable operation in mid-frequency amplifier designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | NPN bipolar junction transistor (BJT), not a MOSFET or IC |
| hFE1 (DC Current Gain) | 135–270 at VCE=2V, IC=100mA - defines small-signal amplification capability in linear region |
| VCE(sat) | 0.15–0.3V at IC=1A, IB=50mA - enables low conduction loss in switching mode |
| fT | 100–160MHz at VCE=2V, IC=100mA - supports audio and medium-frequency signal amplification |
| PC (Max Power Dissipation) | 0.75W at Ta=25°C - sets thermal limit for continuous operation in TO-92 package |
| VCBO / VCEO | 60V / 50V - defines maximum reverse bias and operating voltage limits for safe circuit design |
| Switching Times | tON=0.07μs, tSTG=0.95μs, tF=0.07μs - confirms suitability for medium-speed digital or PWM switching |
Pinout & Package
Package: TO-92 (3-lead plastic package, standard through-hole mounting).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current exit terminal | Reference node for biasing; connects to ground or low-side load return path |
| 2 (Collector) | Current entry terminal | Connects to load supply rail; carries full output current in switching or amplification |
| 3 (Base) | Control input terminal | Receives drive current to modulate collector-emitter conduction; requires external current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Pairing | Explicitly designed as NPN complement to KSB1116/1116A PNP device for push-pull amplifier stages |
| Medium-Speed Switching | Sub-microsecond turn-on/turn-off times (tON/tF ≤0.07μs) enable reliable operation at ~10MHz square-wave frequencies |
| Thermal Robustness | Junction temperature rating of 150°C and defined power derating curve support sustained operation in compact enclosures |
| Low Saturation Voltage | VCE(sat) ≤0.3V at rated IC ensures minimal I²R loss and reduced heat generation during on-state conduction |
Applications
| Audio Output Stage | Relay Driver Circuit |
|---|---|
Use Scenario: Driving 8Ω speaker loads in portable AM/FM radios and intercom systems. IC Role / Device Role / Timing Role: NPN power amplifier stage delivering up to 500mW output with low distortion in Class-A or AB configuration. Use Value: High hFE and low VCE(sat) reduce base drive requirements and improve efficiency over discrete alternatives. | Use Scenario: Controlling 12V/500mA electromagnetic relays in industrial control panels. IC Role / Device Role / Timing Role: Medium-speed saturated switch turning relay coil on/off with fast response and minimal hold current. Use Value: Sub-μs switching times and 2A pulse rating allow robust relay actuation without snubber circuits. |
| DC Motor Speed Control | LED Array Driver |
Use Scenario: PWM-based speed regulation of small 6–12V brushed DC motors in consumer appliances. IC Role / Device Role / Timing Role: Low-side switching element handling average currents up to 800mA with thermal margin. Use Value: Defined SOA curve (Figure 8) and 0.75W dissipation rating support continuous PWM operation at 1–5kHz. | Use Scenario: Driving parallel strings of high-brightness LEDs in signage and indicator modules. IC Role / Device Role / Timing Role: Constant-current switch regulating LED current via base-controlled saturation. Use Value: Tight hFE binning (Y-class) ensures consistent LED brightness across production units without individual calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN BJT amplifier and switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD1616G | TO-220 package, higher PC=1.5W, same hFE range and VCEO=50V | Better suited for higher-power linear amplification or continuous 1A loads | Select when thermal management allows larger package and higher dissipation is required |
| KSC1845FTA | SOT-23 package, lower IC=500mA, hFE=120–240, fT=120MHz | Targeted at space-constrained, lower-current switching or pre-amplifier roles | Select when board space is limited and peak current remains below 500mA |
Compared with KSD1616YTA, MJD1616G offers higher power handling in a larger package, while KSC1845FTA provides miniaturization at reduced current capacity-neither is pin-compatible, but both serve overlapping functional roles in discrete amplifier and switching designs.
Availability
KSD1616YTA is available at Aetrix Electronics and suitable for audio output stages, relay drivers, DC motor controllers, and LED array drivers requiring stable component supply and long-term obsolescence planning.
Supply support for KSD1616YTA 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The KSD1616YTA belongs to Fairchild's legacy general-purpose BJT product line, engineered for cost-effective, thermally reliable audio amplification and medium-speed switching in consumer and industrial equipment.
FAQ
What is the hFE classification for KSD1616YTA?
The "Y" suffix in KSD1616YTA indicates hFE1 (DC current gain) of 135–270 at VCE=2V and IC=100mA. This binning is confirmed in the official Fairchild datasheet Rev. 1.0.0, Figure 3, and the hFE1 Classification table on page 3. KSD1616YTA is distinct from KSD1616G (200–400) and KSD1616L (300–600), and this gain range directly affects base drive design in amplifier and switching circuits using the KSD1616YTA.
Is KSD1616YTA pin-compatible with KSB1116A?
No, KSD1616YTA is not pin-compatible with KSB1116A. While they are complementary devices (NPN vs. PNP), their pinouts differ: KSD1616YTA uses E-C-B (Emitter–Collector–Base) in TO-92, whereas KSB1116A uses E-B-C. This difference is explicitly shown in the absolute maximum ratings table and pin diagrams of the shared datasheet. Designers must verify PCB layout alignment when pairing KSD1616YTA with KSB1116A in push-pull configurations.
What is the maximum pulsed collector current for KSD1616YTA?
The maximum pulsed collector current (ICP) for KSD1616YTA is 2A, specified under conditions of PW ≤10ms and duty cycle <50%, per the Absolute Maximum Ratings table on page 1 of the Fairchild datasheet. This rating enables short-duration overload tolerance in motor startup or relay pull-in scenarios, but sustained operation above 1A DC requires active thermal management due to the 0.75W PC limit in TO-92 packaging.
Does KSD1616YTA support audio-frequency amplification up to 20kHz?
Yes, KSD1616YTA supports full-audio-band amplification up to 20kHz. Its fT of 100–160MHz and measured gain flatness in Figure 3 confirm sufficient bandwidth margin. Combined with low VCE(sat) and controlled Cob (19pF), the KSD1616YTA maintains linearity and phase stability in Class-A/AB audio output stages-verified in typical application circuits documented for KSD1616-series devices in Fairchild's reference designs.
What is the safe operating area (SOA) limitation for KSD1616YTA at 25°C ambient?
At Ta=25°C, the KSD1616YTA SOA (Figure 8) permits simultaneous operation up to VCE=50V and IC=1A in DC mode, or higher current (up to 2A) under pulsed conditions (PW≤10ms). The SOA boundary is constrained by secondary breakdown and thermal limits-not just power dissipation-so designers must avoid operation near the upper-left corner of the SOA plot. This behavior is intrinsic to the KSD1616YTA's silicon construction and is non-negotiable in linear amplifier use cases.
KSD1616YTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 50mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 135 @ 100mA, 2V
- Power - Max:
- 750 mW
- Frequency - Transition:
- 160MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
KSD1616YTA FAQ
1.How can I place an order for KSD1616YTA through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD1616YTA 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 KSD1616YTA reliable?
The price and inventory of KSD1616YTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD1616YTA is usually 5 days.
3.What payment methods are accepted for KSD1616YTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD1616YTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD1616YTA?
KSD1616YTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD1616YTA 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 KSD1616YTA?
For technical support, including KSD1616YTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD1616YTA requirements.
6.How does Aetrix verify that KSD1616YTA is sourced from the original manufacturer or authorized distributors?
All KSD1616YTA 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 KSD1616YTA meets industry standards.
7.What is the process for return or replacement of KSD1616YTA?
All KSD1616YTA units undergo pre-shipment inspection (PSI). If there is an issue with KSD1616YTA, 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 KSD1616YTA part is unused and in its original packaging.
Return procedure for KSD1616YTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSD1616YTA 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…
