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onsemi TIP127TU
- Part No.:
- TIP127TU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
TIP127TU.pdf
- Description:
- TRANS PNP DARL 100V 5A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,265
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Product details
Overview
TIP127TU from ON Semiconductor is a PNP epitaxial Darlington transistor in TO-220 package, rated for -100 V VCEO, -5 A IC (DC), and 65 W PC at TC = 25°C, with hFE ≥ 1000 at IC = -0.5 A and VCE = -3 V. It serves as a medium-power linear/switching device in high-voltage DC motor control and relay driver circuits.
For engineers reviewing the TIP127TU datasheet, pinout, applications, or equivalent options, key selection criteria include its -100 V collector-emitter sustaining voltage, low -2 V VCE(sat) at IC = -3 A / IB = -12 mA, integrated base-emitter resistor network (R1 ≈ 8 kΩ, R2 ≈ 0.12 kΩ), thermal derating above 25°C, and TO-220 mechanical mounting compatibility.
Technical Context
The TIP127TU integrates two PNP transistors in Darlington configuration with on-chip base bias resistors, enabling high current gain without external base drive components. Its structure supports direct interface with TTL/CMOS logic outputs while delivering robust switching performance under inductive loads.
Designed for operation in the active and saturation regions, it features a maximum junction temperature of 150°C, safe operating area (SOA) defined up to 5 ms pulse width, and output capacitance (Cob) of 300 pF at VCB = -10 V - critical for snubberless switching in high-voltage DC applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | -100 V - Sustaining voltage rating defines maximum off-state collector-emitter blocking capability in switching applications. |
| IC (DC) | -5 A - Continuous collector current capacity determines maximum steady-state load handling without thermal runaway. |
| PC @ TC = 25°C | 65 W - Maximum power dissipation at case temperature 25°C sets heatsink sizing baseline for linear-mode operation. |
| hFE | ≥1000 @ IC = -0.5 A - High DC current gain reduces required base drive current, easing microcontroller-level interfacing. |
| VCE(sat) | -2 V @ IC = -3 A, IB = -12 mA - Low saturation voltage minimizes conduction loss and heat generation during on-state operation. |
| Cob | 300 pF @ VCB = -10 V - Output capacitance impacts switching speed and EMI behavior in hard-switched topologies. |
Pinout & Package
Package: TO-220 3L (Single Gauge), through-hole, vertical mounting with metal tab electrically connected to collector. Requires insulated mounting hardware when collector is not at chassis ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input node | Internally connected to R1 (≈8 kΩ) and R2 (≈0.12 kΩ); accepts logic-level drive without external bias resistors. |
| 2 (Collector) | High-side current sink | Electrically tied to metal tab; must be isolated from heatsink unless circuit reference permits common connection. |
| 3 (Emitter) | Current return path | Connected to load return or system ground; establishes emitter-referenced control loop for PNP switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Darlington pair + base resistors | Eliminates need for external bias network, reducing BOM count and PCB footprint in relay/motor driver designs. |
| -100 V VCEO(sus) rating | Enables direct use in 48 V, 72 V, and 96 V DC industrial bus systems without series stacking or voltage clamping. |
| hFE ≥ 1000 at low IC | Allows full turn-on with ≤12 mA base current, compatible with standard GPIO pins and open-collector drivers. |
| TO-220 mechanical standardization | Supports drop-in replacement across legacy Fairchild/ON Semi PNP Darlington families and enables reuse of existing heatsink tooling. |
Applications
| DC Motor Reversal Control | High-Voltage Relay Driver |
|---|---|
Use Scenario: Bidirectional 24–96 V DC brushed motor control using H-bridge topology with PNP/NPN complementary pairs. IC Role / Device Role / Timing Role: High-side PNP switch providing current sinking path during reverse polarity phase. Use Value: -100 V VCEO withstands back-EMF spikes; -2 V VCE(sat) limits power loss at 3–5 A load currents. |
Use Scenario: Driving 24–48 V coil relays in programmable logic controllers and industrial I/O modules. IC Role / Device Role / Timing Role: Medium-power interface between microcontroller output and inductive relay coil. Use Value: Integrated base resistors simplify drive circuitry; 65 W PC supports sustained 5 A coil current with minimal heatsinking. |
| Linear Regulator Pass Element | Capacitor Discharge Circuit |
Use Scenario: Series pass transistor in adjustable negative linear regulators delivering up to -5 A at -12 to -48 V output. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output by dissipating excess input-output differential. Use Value: High hFE ensures stable regulation with low base drive error; SOA curve supports continuous operation at 3 A with 20 V drop. |
Use Scenario: Controlled discharge of high-energy storage capacitors (e.g., flash lamps, pulse lasers) requiring fast, high-current dump paths. IC Role / Device Role / Timing Role: High-current switch triggered by logic signal to short capacitor terminals through low-resistance path. Use Value: -8 A ICP rating handles 5 ms pulses; low VCE(sat) minimizes energy loss during discharge phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | Surface-mount DPAK package; same -100 V VCEO, -5 A IC, but lower PC (35 W @ TC = 25°C). | Requires PCB rework for SMT assembly; unsuitable for through-hole legacy boards or high-power heatsink mounting. | Select when space-constrained PCB layout demands SMT or when thermal management uses copper pour instead of external heatsink. |
| TIP147 | Same TO-220 package; higher -100 V VCEO but enhanced hFE (1000–5000), higher PC (125 W), and built-in thermal shutdown. | Offers improved reliability in thermally demanding environments; requires verification of base drive compatibility due to wider hFE spread. | Select when long-term thermal stability or overtemperature protection is required beyond TIP127TU's specification. |
Compared with MJD127G and TIP147, the TIP127TU provides proven through-hole manufacturability and balanced performance for cost-sensitive industrial controls, while offering lower thermal margin than TIP147 and higher power handling than MJD127G in identical mounting conditions.
Availability
TIP127TU is available at Aetrix Electronics and suitable for DC motor control, relay driving, and linear regulator applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TIP127TU 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and logic solutions for automotive, industrial, and consumer markets.
The TIP127TU belongs to ON Semiconductor's legacy power bipolar transistor product line, originally developed by Fairchild Semiconductor to deliver rugged, cost-effective switching and linear amplification for industrial control and power conversion systems.
FAQ
What is the maximum continuous collector current for the TIP127TU?
The TIP127TU is rated for -5 A DC collector current at case temperature TC = 25°C. Derating is required above this temperature per the published power derating curve - approximately 0.52 W/°C reduction beyond 25°C. Operation at full -5 A requires adequate heatsinking to maintain TC ≤ 25°C; actual usable current depends on ambient conditions and thermal design. The TIP127TU datasheet specifies this limit under absolute maximum ratings and electrical characteristics sections.
Does the TIP127TU have built-in base resistors?
Yes, the TIP127TU integrates two on-chip base resistors: R1 ≈ 8 kΩ between base and emitter, and R2 ≈ 0.12 kΩ between base and collector. This Darlington configuration eliminates the need for external bias components, allowing direct connection to TTL or CMOS logic outputs. The internal resistor network is confirmed in the equivalent circuit diagram and electrical test conditions of the official TIP127TU datasheet.
What is the collector-emitter saturation voltage of the TIP127TU?
The TIP127TU has a typical VCE(sat) of -2 V at IC = -3 A and IB = -12 mA, and -4 V at IC = -5 A and IB = -20 mA. These values are measured under pulsed conditions (pulse width ≤ 300 μs, duty cycle ≤ 2%) and define the on-state conduction loss. Designers must verify thermal stability when operating near these limits, as VCE(sat) increases with junction temperature.
Can the TIP127TU replace the TIP126TU or TIP125TU in a design?
Yes, the TIP127TU is pin-compatible and functionally interchangeable with TIP126TU and TIP125TU, differing only in voltage ratings: TIP127TU supports -100 V VCEO, versus -80 V for TIP126TU and -60 V for TIP125TU. All three share identical package (TO-220), pinout, gain, saturation voltage, and thermal characteristics. Substitution is safe if the higher voltage rating meets or exceeds the application's blocking requirement.
What is the safe operating area (SOA) limitation for the TIP127TU?
The TIP127TU SOA is defined up to 5 ms pulse width with no second breakdown limit shown in the datasheet, indicating operation is limited by thermal constraints rather than avalanche failure. At DC, the SOA boundary follows the 65 W power dissipation limit; at shorter pulses, it extends to higher current/voltage combinations - e.g., -5 A at -20 V for 100 μs. Designers must consult Figure 4 (Safe Operating Area) in the TIP127TU datasheet for exact boundaries under specific pulse conditions.
TIP127TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 4V @ 20mA, 5A
- Current - Collector Cutoff (Max):
- 2mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 1000 @ 3A, 3V
- Power - Max:
- 2 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
TIP127TU FAQ
1.How can I place an order for TIP127TU through Aetrix?
Please submit a Request for Quotation (RFQ) for TIP127TU 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 TIP127TU reliable?
The price and inventory of TIP127TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP127TU is usually 5 days.
3.What payment methods are accepted for TIP127TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP127TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TIP127TU?
TIP127TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TIP127TU 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 TIP127TU?
For technical support, including TIP127TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP127TU requirements.
6.How does Aetrix verify that TIP127TU is sourced from the original manufacturer or authorized distributors?
All TIP127TU 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 TIP127TU meets industry standards.
7.What is the process for return or replacement of TIP127TU?
All TIP127TU units undergo pre-shipment inspection (PSI). If there is an issue with TIP127TU, 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 TIP127TU part is unused and in its original packaging.
Return procedure for TIP127TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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