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onsemi TIP47
- Part No.:
- TIP47
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
TIP47.pdf
- Description:
- TRANS NPN 250V 1A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,690
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Product details
Overview
TIP47 from ON Semiconductor is a high-voltage NPN silicon power transistor in TO-220 package, rated for 250 V collector-emitter sustaining voltage (VCEO(sus)), 1 A DC collector current, and 40 W collector dissipation at TC = 25°C. It serves as a switching or linear amplifier device in off-line power supplies, relay drivers, and motor control circuits requiring robust voltage handling.
For engineers reviewing the TIP47 datasheet, pinout, applications, or equivalent options, key selection criteria include its 250 V VCEO(sus), 1 A IC, 40 W PC, TO-220 thermal performance, and confirmed NPN switching behavior under pulsed and DC conditions.
Technical Context
The TIP47 operates as a general-purpose bipolar junction transistor with fixed NPN polarity, designed for medium-power switching where high breakdown voltage and moderate current capability are required. Its DC current gain (hFE) ranges from 30 to 150 at VCE = 10 V and IC = 0.3 A, and drops to ≥10 at IC = 1 A, indicating usable gain in both small-signal and saturated-switching modes.
Thermal design relies on case-mounted heatsinking: maximum junction temperature is 150°C, and power derating begins above 25°C case temperature at 0.32 W/°C. Safe operating area (SOA) curves confirm capability for 1 ms pulses up to 10 A at 100 V, supporting transient load handling in industrial controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 250 V - Sustains 250 V between collector and emitter during switching transitions without avalanche breakdown. |
| IC (DC) | 1 A - Continuous collector current rating defines steady-state power stage capacity in linear or switching operation. |
| PC (TC = 25°C) | 40 W - Maximum power dissipation achievable with adequate heatsinking at 25°C case temperature. |
| hFE | 30–150 - DC current gain range enables predictable base drive sizing across operating points from 0.3 A to 1 A collector current. |
| VCE(sat) | 1 V @ IC = 1 A, IB = 0.2 A - Low saturation voltage minimizes conduction loss in switch-mode applications. |
| fT | 10 MHz - Current gain bandwidth product supports stable operation up to ~1 MHz in amplifier configurations. |
Pinout & Package
Package: TO-220 3L (Single Gauge), through-hole, thermally enhanced plastic package with metal tab electrically connected to collector. Mounting requires insulating washer unless collector is at system ground potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input terminal | Receives forward-biased current to turn on transistor; requires ≥0.2 A base drive for full saturation at 1 A collector current. |
| 2 (Collector) | High-side power output terminal | Connected to metal tab; carries main load current and dissipates heat; must be electrically isolated from heatsink unless referenced to ground. |
| 3 (Emitter) | Reference/output return terminal | Serves as common return path; voltage drop across emitter resistor sets operating point in linear mode or provides feedback in current-limiting designs. |
Key Features
| Feature | Design Value |
|---|---|
| High sustaining voltage | VCEO(sus) = 250 V enables use in 220 VAC line-connected circuits without additional snubbing in many flyback or relay driver topologies. |
| Robust SOA | Supports 1 ms pulse currents up to 10 A at 100 V, allowing safe handling of inductive kickback in solenoid and motor gate-drive applications. |
| TO-220 thermal interface | 40 W power rating at TC = 25°C confirms suitability for forced-air or moderate heatsink solutions in industrial enclosures. |
| DC current gain consistency | hFE ≥ 10 at IC = 1 A ensures reliable saturation with standard 5 V logic-level base drive via series resistor or driver IC. |
Applications
| Switch-Mode Power Supply | Relay Driver Circuit |
|---|---|
|
Use Scenario: Primary-side switching transistor in low-cost offline flyback converters delivering ≤15 W. IC Role / Device Role / Timing Role: NPN power switch controlled by PWM controller via base resistor; handles 250 V DC bus and 1 A peak primary current. Use Value: 250 V VCEO(sus) and 40 W PC allow direct replacement of older 2N3055 variants without redesigning snubber or heatsink. |
Use Scenario: Driving 24 VDC industrial relays with coil resistance <100 Ω in PLC output modules. IC Role / Device Role / Timing Role: High-current saturated switch turning relay on/off with TTL or microcontroller GPIO. Use Value: 1 V VCE(sat) at 1 A reduces coil power loss and self-heating, improving long-term contact reliability. |
| Motor Speed Control | Linear Regulator Pass Element |
|
Use Scenario: Single-ended chopper for brushed DC motors in HVAC actuators or conveyor systems. IC Role / Device Role / Timing Role: Medium-power switching element modulated at 1–20 kHz to regulate average motor voltage. Use Value: 10 MHz fT and SOA support clean switching edges and resistive-inductive load stability without oscillation. |
Use Scenario: Series pass transistor in adjustable 0–24 V, 1 A linear power supply for test equipment. IC Role / Device Role / Timing Role: Voltage-controlled current source dissipating up to 25 W under worst-case dropout conditions. Use Value: 150°C TJ max and TO-220 package enable operation with passive heatsinking at full 1 A load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | TO-252 (DPAK), 80 V VCEO, 2 A IC, lower voltage rating but surface-mount compatible. | Not suitable for 220 VAC-derived rails; limited to low-voltage DC-DC or automotive 12 V systems. | Select when board space is constrained and voltage stress remains below 80 V. |
| TIP31C | TO-220, 100 V VCEO, 3 A IC, higher current but significantly lower breakdown voltage. | Acceptable only in low-line (<120 VAC) or DC-fed applications where VCE never exceeds 80 V. | Choose if higher current is needed and system voltage is strictly limited to ≤100 V. |
Compared with MJD127G and TIP31C, the TIP47 uniquely balances 250 V voltage capability with 1 A current and TO-220 thermal performance-making it the only option among the three viable for universal-input offline switchers or 240 VAC industrial controls.
Availability
TIP47 is available at Aetrix Electronics and suitable for switch-mode power supplies, relay driver circuits, and motor speed controllers requiring stable component supply and long-lifecycle availability.
Supply support for TIP47 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 energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The TIP47 belongs to ON Semiconductor's legacy power bipolar transistor family, originally developed by Fairchild for cost-sensitive, medium-power linear and switching applications demanding ruggedness and manufacturability.
FAQ
What is the maximum collector-emitter voltage rating for the TIP47?
The TIP47 has a collector-emitter sustaining voltage (VCEO(sus)) of 250 V, verified under IC = 30 mA and IB = 0 conditions. This rating reflects its ability to block voltage during switching transients and is distinct from the lower VCEO = 250 V DC rating. The TIP47 must not be operated beyond this limit in any circuit configuration without external clamping.
Can the TIP47 be used as a direct replacement for the 2N3055 in existing designs?
The TIP47 is not a direct replacement for the 2N3055 due to lower current rating (1 A vs. 15 A) and different gain characteristics, but it can replace 2N3055 in low-current, high-voltage roles such as auxiliary switchers or signal-level amplifiers where 250 V blocking and TO-220 mounting are sufficient. Always verify SOA, thermal design, and base drive requirements before substitution in the TIP47.
Does the TIP47 have a built-in base-emitter resistor or protection diode?
No, the TIP47 is a standard three-terminal NPN bipolar transistor with no integrated base-emitter resistor or protection diode. External components-including base current limiting resistors, flyback diodes across inductive loads, and emitter degeneration resistors-are required per application. This discrete architecture allows full design flexibility but places responsibility for protection on the circuit designer for the TIP47.
What is the thermal resistance from junction to case (RθJC) for the TIP47?
The TIP47 has a typical junction-to-case thermal resistance (RθJC) of 0.625°C/W, derived from its 40 W power rating at TC = 25°C and 150°C maximum junction temperature. This value assumes proper mounting with thermal compound and mechanical torque compliance per TO-220 specifications, and is critical for calculating heatsink requirements in the TIP47's thermal design.
Is the TIP47 suitable for audio amplifier output stages?
The TIP47 is not optimized for high-fidelity audio output stages due to limited fT (10 MHz), moderate hFE variation, and lack of matched complementary pairs. It may serve in low-bandwidth, low-power Class-A or Class-AB pre-driver positions, but dedicated audio transistors like the MJ15003 or MJE15030 offer superior linearity, gain matching, and SOA for the TIP47's intended use cases.
TIP47 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 250 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 200mA, 1A
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 300mA, 10V
- Power - Max:
- 2 W
- Frequency - Transition:
- 10MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
TIP47 FAQ
1.How can I place an order for TIP47 through Aetrix?
Please submit a Request for Quotation (RFQ) for TIP47 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 TIP47 reliable?
The price and inventory of TIP47 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP47 is usually 5 days.
3.What payment methods are accepted for TIP47?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP47 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TIP47?
TIP47 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TIP47 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 TIP47?
For technical support, including TIP47 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP47 requirements.
6.How does Aetrix verify that TIP47 is sourced from the original manufacturer or authorized distributors?
All TIP47 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 TIP47 meets industry standards.
7.What is the process for return or replacement of TIP47?
All TIP47 units undergo pre-shipment inspection (PSI). If there is an issue with TIP47, 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 TIP47 part is unused and in its original packaging.
Return procedure for TIP47:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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