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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics TIP135

Name: TIP135
Brand: STMicroelectronics
SKU: TIP135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP135

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP135.pdf

Description:: TRANS PNP DARL 60V 8A TO-220

Quantity:: RFQ Add To RFQ list

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Inventory:3,663

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Product details

Overview

TIP135 from STMicroelectronics is a silicon PNP power Darlington transistor in TO-220 package, designed for high-current linear and switching applications such as motor control, relay drivers, and industrial power supplies. It features V_CEO = –100 V, I_C = –8 A, h_FE ≥ 500 at I_C = –1 A, V_CE(sat) = –2 V at I_C = –4 A / I_B = –16 mA, and T_j(max) = 150 °C.

For engineers reviewing the TIP135 datasheet, TIP135 pinout, TIP135 application, or TIP135 equivalent, key selection considerations include complementary NPN pairing (TIP132/TIP137), safe operating area limits, base drive requirements, thermal derating above 25 °C case temperature, and DC current gain consistency across collector current range.

Technical Context

The TIP135 operates as a monolithic PNP Darlington pair with integrated base-emitter resistors (R1 ≈ 5 kΩ, R2 ≈ 150 Ω), enabling simplified biasing and improved turn-off speed versus single transistors. Its negative-polarity voltage/current ratings reflect PNP operation: V_CBO = –100 V, V_CEO = –100 V, and I_C = –8 A continuous.

Thermal design is critical: R_th(j-case) = 1.78 °C/W and R_th(j-amb) = 63.5 °C/W define junction-to-case and junction-to-ambient limits. Power derating begins at T_case > 25 °C, with total dissipation dropping to 2 W at ambient temperature due to low thermal efficiency in TO-220 without heatsink.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–100 V: Maximum reverse-biased collector-emitter voltage before breakdown; defines safe blocking capability in switching circuits.
I_C	–8 A: Continuous DC collector current rating; sets maximum load current handling without forced cooling.
h_FE	500–15000: DC current gain range at I_C = –1 A to –4 A; determines required base drive current for saturation.
V_CE(sat)	–2 V @ I_C = –4 A / I_B = –16 mA: Saturation voltage under typical drive; directly impacts conduction loss and heat generation.
R_th(j-case)	1.78 °C/W: Junction-to-case thermal resistance; used to calculate heatsink requirement when mounting to metal surface.
T_j(max)	150 °C: Maximum allowable junction temperature; constrains ambient + power loss + thermal path design margin.

Pinout & Package

Package: TO-220 (3-lead, vertical mounting, insulated tab). Standard pin assignment viewed from front (flat side): Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (tab-connected).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Current exit terminal for PNP device	Connected to higher potential rail in common-emitter configuration; must handle full load current and be routed with low-inductance trace.
Pin 2 (Base)	Control input for Darlington pair	Drives internal NPN pre-driver; requires –16 mA for full saturation at –4 A load; resistor network (R1/R2) enables self-biasing.
Pin 3 (Collector)	Main current entry terminal	Internally connected to metal tab; electrically tied to heatsink; must be isolated from chassis unless circuit ground reference permits.

Key Features

Feature	Design Value
Monolithic Darlington structure	Integrates driver and output transistors on one die, delivering high h_FE (>500) without external components.
Integrated base-emitter resistors	R1 ≈ 5 kΩ and R2 ≈ 150 Ω enable reliable turn-off and reduce external component count in switching designs.
TO-220 mechanical standardization	Enables drop-in replacement in legacy industrial PCB footprints and compatibility with off-the-shelf heatsinks.
High V_CEO rating	–100 V blocking capability supports 48 V and 72 V industrial bus systems with safety margin against transients.

Applications

DC Motor Control

Relay Driver Circuit

Use Scenario: Bidirectional 24–48 V brushed DC motor control in factory automation actuators.

IC Role / Device Role / Timing Role: PNP high-side switch in H-bridge half-bridge stage, sinking current during active braking or direction reversal.

Use Value: High h_FE reduces base drive power; –100 V V_CEO withstands inductive kickback up to 80 V peak.

Use Scenario: Solid-state replacement for electromechanical relays controlling HVAC dampers or lighting banks.

IC Role / Device Role / Timing Role: Low-speed, high-current switch interfacing microcontroller GPIO to 12–24 V inductive loads.

Use Value: Integrated resistors eliminate need for external base pull-down; TO-220 allows direct bolt-on heatsinking for 5–10 A sustained loads.

Linear Regulator Pass Element

Industrial Power Supply Output Stage

Use Scenario: Adjustable 5–30 V, 3–6 A linear regulator for test equipment power rails.

IC Role / Device Role / Timing Role: Series pass transistor dissipating up to 40 W under worst-case dropout conditions.

Use Value: R_th(j-case) = 1.78 °C/W enables thermal management with modest heatsink; V_CE(sat) < –2 V minimizes dropout voltage at full load.

Use Scenario: Unregulated 12–24 V output stage in DIN-rail mounted AC/DC power supplies for PLC I/O modules.

IC Role / Device Role / Timing Role: Main switching element in quasi-resonant or hard-switched flyback secondary-side synchronous rectification or linear post-regulation.

Use Value: Complementary pairing with TIP132 allows matched push-pull operation; –8 A I_C supports >100 W output with redundancy margin.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD130	TO-252 (DPAK) surface-mount package; V_CEO = –100 V, I_C = –8 A, but lower h_FE (min 500 vs. TIP135's 500 typ).	Suitable for automated SMT assembly; lacks TO-220 mechanical robustness and heatsink interface.	Select when board space and reflow compatibility outweigh serviceability and thermal modularity.
TIP147	Same TO-220 package; V_CEO = –100 V, I_C = –10 A, h_FE ≥ 1000 - higher current and gain, but no integrated base resistors.	Requires external base bias network; better for precision linear applications where gain stability matters more than simplicity.	Select when higher current headroom and adjustable base drive are prioritized over integrated simplicity.

Compared with MJD130 and TIP147, the TIP135 uniquely combines TO-220 through-hole reliability, integrated biasing, and –100 V/–8 A ratings - making it optimal for serviceable, medium-power industrial controls where ease of replacement and thermal accessibility are critical.

Availability

TIP135 is available at Aetrix Electronics and suitable for industrial motor drives, relay interface modules, linear power supply designs, and embedded power conversion requiring stable component supply across multi-year production cycles.

Supply support for TIP135 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power discrete solutions with broad manufacturing and quality certification coverage.

The TIP135 belongs to ST's legacy power bipolar transistor family, engineered specifically for ruggedized industrial linear and switching applications where reliability, thermal resilience, and mechanical serviceability are mandatory.

FAQ

Is the TIP135 pin-compatible with the TIP132?

No - the TIP135 (PNP) and TIP132 (NPN) share identical TO-220 package dimensions and pin numbering (Emitter-Base-Collector), but their polarity and voltage/current sign conventions are opposite. Direct substitution without circuit topology revision will cause functional failure.

What is the role of the internal 5 kΩ and 150 Ω resistors?

The 5 kΩ resistor connects base to emitter, and the 150 Ω resistor connects base to collector. Together they provide automatic turn-off biasing and improve switching speed by discharging stored base charge - eliminating need for external pull-down resistors in most switching applications.

Can the TIP135 be used without a heatsink?

Only at very low duty cycles and ambient temperatures ≤25 °C: its P_tot drops to 2 W at T_amb = 25 °C due to high R_th(j-amb) = 63.5 °C/W. For I_C > 1 A or continuous operation, a heatsink with R_th(sa) ≤ 10 °C/W is required to maintain T_j < 150 °C.

How does the TIP135 differ from standard PNP transistors like BC557?

The TIP135 is a monolithic Darlington with h_FE > 500 and I_C = –8 A, whereas BC557 is a small-signal PNP (I_C = –100 mA, h_FE ~ 125). The TIP135 integrates power handling, thermal robustness, and built-in biasing - making it unsuitable as a signal-level replacement and vice versa.

TIP135 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP - Darlington

Current - Collector (Ic) (Max):: 8 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 4V @ 30mA, 6A

Current - Collector Cutoff (Max):: 500µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1000 @ 4A, 4V

Power - Max:: 2 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

TIP135 FAQ

1.How can I place an order for TIP135 through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP135 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 TIP135 reliable?

The price and inventory of TIP135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP135 is usually 5 days.

3.What payment methods are accepted for TIP135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP135?

TIP135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP135 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 TIP135?

For technical support, including TIP135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP135 requirements.

6.How does Aetrix verify that TIP135 is sourced from the original manufacturer or authorized distributors?

All TIP135 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 TIP135 meets industry standards.

7.What is the process for return or replacement of TIP135?

All TIP135 units undergo pre-shipment inspection (PSI). If there is an issue with TIP135, 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 TIP135 part is unused and in its original packaging.

Return procedure for TIP135:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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