My Inquiry
My Account
NXP Semiconductors PDTA123YS,126
,TO-226_straightlead.jpg)
- Part No.:
- PDTA123YS,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
PDTA123YS,126.pdf
- Description:
- TRANS PREBIAS PNP 50V TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,054
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PDTA123YS,126 from Nexperia is a PNP resistor-equipped transistor (RET) in TO-92 (SOT54) through-hole package, featuring integrated bias resistors R1 = 2.2 kΩ and R2/R1 = 4.5 (R2 ≈ 10 kΩ), VCEO = −50 V, IO = −100 mA, and Ptot = 500 mW at Tamb ≤ 25 °C - used for general-purpose switching in industrial control logic interfaces.
For engineers reviewing the PDTA123YS,126 datasheet, PDTA123YS,126 pinout, PDTA123YS,126 application, or PDTA123YS,126 equivalent, key selection considerations include its fixed internal resistor ratio, −50 V collector-emitter blocking capability, TO-92 mechanical compatibility, and DC current gain (hFE ≥ 35 at IC = −5 mA).
Technical Context
This device integrates two precision bias resistors (R1 = 2.2 kΩ ±30 %, R2/R1 = 4.5 ±21 %) directly into a monolithic PNP bipolar transistor die, eliminating external base resistors and reducing PCB component count. Its simplified input structure accepts direct TTL/CMOS logic-level drive without level-shifting circuitry.
The SOT54 (TO-92) package provides through-hole mounting with 2.54 mm lead pitch and 14.5 mm body length, supporting manual assembly and wave soldering per JEDEC J-STD-020. Thermal resistance Rth(j-a) = 250 K/W enables operation up to Tj = 150 °C under defined ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - maximum collector-emitter voltage before breakdown; supports 24 V industrial bus switching with margin. |
| IO | −100 mA - continuous DC output current rating; sufficient for driving relays, LEDs, or small solenoids. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ) - input bias resistor; sets base current for predictable turn-on with standard logic outputs. |
| R2/R1 | 4.5 (3.6–5.5) - internal feedback resistor ratio; stabilizes operating point against temperature and β variation. |
| hFE | ≥35 - minimum DC current gain at VCE = −5 V, IC = −5 mA; ensures reliable saturation with low drive current. |
| VCE(sat) | ≤ −150 mV - collector-emitter saturation voltage at IC = −10 mA, IB = −0.5 mA; minimizes power loss in on-state. |
| Ptot | 500 mW - total power dissipation at Tamb ≤ 25 °C; defines thermal derating curve for sustained operation. |
Pinout & Package
SOT54 (SC-43A / TO-92) is a plastic single-ended leaded through-hole package with 3 leads, 2.54 mm lead pitch, and 14.5 mm overall length - optimized for manual insertion and wave soldering in industrial control boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Internal connection to R1 and R2 network; accepts logic-level input without external pull-up/down. |
| 2 | output (collector) | High-side switch node; sinks current when active; rated for −50 V and −100 mA DC. |
| 3 | GND (emitter) | Common reference terminal; tied to system ground; enables low-side load switching configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 + R2 bias network | Eliminates 2 external resistors; reduces BOM count and layout area in discrete switching circuits. |
| Fixed R2/R1 ratio of 4.5 | Provides stable bias point across temperature and process variation; improves consistency in mass production. |
| −50 V VCEO rating | Supports 24 V industrial control rails with 100 % safety margin; suitable for PLC I/O modules. |
| TO-92 mechanical form factor | Enables legacy board compatibility and hand-soldering repair; widely supported by automated insertion equipment. |
| hFE ≥ 35 at −5 mA | Ensures full saturation with ≤0.5 mA base drive; compatible with 3.3 V and 5 V microcontroller GPIOs. |
Applications
| Industrial Relay Driver | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 24 V DC coil relays in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: High-side PNP switch controlling relay coil current path to ground. Use Value: Integrated R1/R2 eliminates need for discrete base resistors, reducing bill-of-materials cost and PCB real estate by 2 components per channel. |
Use Scenario: Extending limited GPIO count of an ARM Cortex-M0 MCU to control multiple LED indicators and status signals. IC Role / Device Role / Timing Role: General-purpose digital switch translating logic-high to active-low output for indicator loads. Use Value: −150 mV VCE(sat) minimizes voltage drop and self-heating during continuous LED drive, enabling stable 20 mA per channel. |
| Legacy TTL Logic Interface | Power Supply Enable Control |
Use Scenario: Level-shifting and inversion between 5 V TTL logic families and −12 V analog subsystems in test equipment. IC Role / Device Role / Timing Role: Inverting buffer with built-in biasing; converts positive logic input to negative rail referenced output. Use Value: VI(on) = −1.15 V typical ensures clean turn-on with standard TTL output swing, avoiding marginal switching near logic thresholds. |
Use Scenario: Enabling/disabling auxiliary 5 V LDO regulators in embedded systems based on microcontroller command signals. IC Role / Device Role / Timing Role: Low-power enable switch placed between regulator EN pin and system ground. Use Value: −5 V VEBO rating prevents damage from transient coupling on enable lines; supports robust power sequencing in multi-rail designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC123YS | NPN complement; same R1/R2 values, polarity inverted; VCEO = +50 V, IO = +100 mA. | Used where low-side switching (sink) is preferred over high-side (source) configuration. | Select PDTC123YS when load connects to VCC and switch pulls to ground - avoids redesigning driver logic polarity. |
| MMBT3906LT1G | Standard PNP BJT without bias resistors; requires external RB; hFE = 100–300; VCEO = −40 V. | Offers higher gain and lower VCE(sat), but increases component count and layout complexity. | Choose MMBT3906LT1G only if precise gain control or sub-100 mV saturation is required and external resistor placement is acceptable. |
Compared with PDTC123YS and MMBT3906LT1G, PDTA123YS,126 delivers plug-and-play high-side switching with guaranteed bias stability and TO-92 mechanical compatibility - ideal for cost-sensitive, space-constrained industrial control designs where design reuse and manufacturing simplicity are prioritized.
Availability
PDTA123YS,126 is available at Aetrix Electronics and suitable for industrial control logic, relay drivers, and microcontroller interface circuits requiring stable component supply and long-term obsolescence management.
Supply support for PDTA123YS,126 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The PDTA123YS,126 belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered to simplify digital switching circuits by integrating precision bias networks into standard bipolar packages.
FAQ
What is the pin configuration of PDTA123YS,126?
The PDTA123YS,126 uses SOT54 (TO-92) packaging with Pin 1 = input (base), Pin 2 = output (collector), and Pin 3 = GND (emitter). This pinout is confirmed in Table 3 of the official Nexperia datasheet and applies specifically to the SOT54 variant - not surface-mount variants like SOT23 or SOT323.
Does PDTA123YS,126 require external base resistors?
No, PDTA123YS,126 does not require external base resistors because it integrates R1 = 2.2 kΩ and R2 ≈ 10 kΩ internally. The R2/R1 ratio of 4.5 provides stable biasing, allowing direct connection to 3.3 V or 5 V logic outputs - a core design feature of the PDTA123YS,126 RET family.
What is the maximum operating temperature for PDTA123YS,126?
The PDTA123YS,126 has a maximum junction temperature (Tj) of 150 °C and a storage temperature range of −65 °C to +150 °C. Its thermal resistance Rth(j-a) = 250 K/W in free air means ambient temperature must be derated above 25 °C to maintain safe junction operation - verified in Table 7 of the Nexperia datasheet.
Can PDTA123YS,126 replace a standard PNP transistor like BC807?
PDTA123YS,126 is not a direct replacement for BC807 due to its integrated bias network and different pinout (BC807 uses emitter-collector-base order in SOT23). While both are PNP transistors, PDTA123YS,126 requires no external resistors and is optimized for digital switching - unlike BC807, which is designed for linear amplification and discrete biasing.
What marking code identifies PDTA123YS,126 on the package?
The PDTA123YS,126 is marked "TA123Y" on the device body, as specified in Table 5 of the Nexperia datasheet. This marking is distinct from other variants in the PDTA123Y series (e.g., PDTA123YE is marked "14", PDTA123YK is marked "13") and confirms the SOT54 package and PNP RET functionality of the PDTA123YS,126 unit.
PDTA123YS,126 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 35 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 500 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
PDTA123YS,126 FAQ
1.How can I place an order for PDTA123YS,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTA123YS,126 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 PDTA123YS,126 reliable?
The price and inventory of PDTA123YS,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA123YS,126 is usually 5 days.
3.What payment methods are accepted for PDTA123YS,126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA123YS,126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTA123YS,126?
PDTA123YS,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTA123YS,126 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 PDTA123YS,126?
For technical support, including PDTA123YS,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA123YS,126 requirements.
6.How does Aetrix verify that PDTA123YS,126 is sourced from the original manufacturer or authorized distributors?
All PDTA123YS,126 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 PDTA123YS,126 meets industry standards.
7.What is the process for return or replacement of PDTA123YS,126?
All PDTA123YS,126 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA123YS,126, 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 PDTA123YS,126 part is unused and in its original packaging.
Return procedure for PDTA123YS,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTA123YS,126 Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
Tech Hub
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
