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

onsemi 2SC4135T-E

Name: 2SC4135T-E
Brand: onsemi
SKU: 2SC4135T-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC4135T-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: 2SC4135T-E.pdf

Description:: TRANS NPN 100V 2A TP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC4135T-E from onsemi is an NPN bipolar junction transistor in TP (TO-251) package, rated for 100 V V_CEO, 2 A I_C, and 15 W P_C at T_c=25°C, with low V_CE(sat) of 0.13 V (typ) at I_C=1 A / I_B=100 mA, optimized for power switching in lamp drivers and relay drivers.

For engineers reviewing the 2SC4135T-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CEO/I_C ratings, TP package thermal performance, h_FE rank T (200–400), f_T = 120 MHz, and confirmed V_CE(sat) under switching conditions.

Technical Context

The 2SC4135T-E is a discrete silicon NPN transistor fabricated using FBET and MBIT processes, enabling high breakdown voltage (V_(BR)CBO = −120 V) and fast switching (t_on = 80 ns, t_f = 50 ns). It operates with DC current gain h_FE ranked T (200–400) at V_CE = −5 V, I_C = −100 mA.

Designed for linear and switching applications up to 150°C junction temperature, it supports pulse operation (I_CP = 3 A) and exhibits Cob = 16 pF at V_CB = −10 V, f = 1 MHz - critical for minimizing Miller effect in high-speed switching circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - maximum collector-emitter voltage before breakdown; enables use in 48 V and 100 V rail power stages
I_C	2 A continuous - supports medium-power load switching without forced cooling in compact layouts
V_CE(sat)	0.13 V (typ) at I_C=1 A/I_B=100 mA - reduces conduction loss and self-heating in saturated-switching mode
f_T	120 MHz - sufficient for audio-frequency amplification and sub-MHz switching control loops
h_FE Rank	T (200–400) - ensures predictable base drive requirements and stable gain across production lots
P_C @ T_c	15 W - defines heatsink sizing when mounted on PCB copper or external metal core
Cob	16 pF at V_CB=−10 V - limits capacitive loading on driver stage and affects rise/fall time consistency

Pinout & Package

Package: TP (TO-251), single-ended leaded, surface-mount compatible with through-hole footprint; 7.0 mm × 5.0 mm × 2.3 mm body, 0.315 g mass, JEDEC-compliant SC-64 outline.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring ~100 mA base current to saturate 1 A collector load; low V_BE(sat) = −0.85 V (min)
2	Collector	Main current path; electrically connected to pin 4; requires thermal pad connection for 15 W dissipation
3	Emitter	Reference node for biasing; tied to ground or low-side return path in common-emitter configurations
4	Collector	Dual-collector configuration enhances current handling and thermal distribution; must be shorted externally to pin 2

Key Features

Feature	Design Value
Low V_CE(sat)	0.13 V typ at I_C=1 A - cuts conduction loss by >50% vs. standard general-purpose transistors
High V_(BR)CBO	120 V - provides 20% voltage margin over 100 V system rails, improving surge robustness
Fast switching	t_on/t_f = 80/50 ns - enables clean square-wave drive in <1 MHz PWM lamp/relay control
TP package	TO-251 outline with dual collector leads - improves thermal transfer and mechanical stability on FR-4 PCBs
h_FE rank T	200–400 range - simplifies base resistor design and reduces variation in saturation depth across batches

Applications

Lamp Driver	Relay Driver
Use Scenario: Driving incandescent or LED arrays in industrial control panels with 24–48 V supply rails. IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink load current to ground. Use Value: Low V_CE(sat) minimizes power loss and heat generation during continuous-on operation.	Use Scenario: Controlling electromechanical relays in PLC output modules requiring 1–2 A coil current. IC Role / Device Role / Timing Role: Medium-current switching element interfacing microcontroller GPIO to relay coil. Use Value: Fast t_f = 50 ns ensures rapid relay deactivation, reducing contact arcing and wear.
DC Power Supply	Motor Control Interface
Use Scenario: Regulating auxiliary 5–12 V rails in offline SMPS using linear pass or series-switch topology. IC Role / Device Role / Timing Role: Series-pass transistor or primary-side switch in low-frequency feedback loop. Use Value: 15 W P_C rating allows direct mounting on copper pour without dedicated heatsink.	Use Scenario: Driving small brushed DC motors (e.g., fans, actuators) in embedded motion systems. IC Role / Device Role / Timing Role: H-bridge half-bridge switch or unidirectional motor enable transistor. Use Value: Dual-collector pinout (pins 2 & 4) improves current sharing and thermal spreading under 2 A stall conditions.

Lamp Driver

Relay Driver

Use Scenario: Driving incandescent or LED arrays in industrial control panels with 24–48 V supply rails.

IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink load current to ground.

Use Value: Low V_CE(sat) minimizes power loss and heat generation during continuous-on operation.

Use Scenario: Controlling electromechanical relays in PLC output modules requiring 1–2 A coil current.

IC Role / Device Role / Timing Role: Medium-current switching element interfacing microcontroller GPIO to relay coil.

Use Value: Fast t_f = 50 ns ensures rapid relay deactivation, reducing contact arcing and wear.

DC Power Supply

Motor Control Interface

Use Scenario: Regulating auxiliary 5–12 V rails in offline SMPS using linear pass or series-switch topology.

IC Role / Device Role / Timing Role: Series-pass transistor or primary-side switch in low-frequency feedback loop.

Use Value: 15 W P_C rating allows direct mounting on copper pour without dedicated heatsink.

Use Scenario: Driving small brushed DC motors (e.g., fans, actuators) in embedded motion systems.

IC Role / Device Role / Timing Role: H-bridge half-bridge switch or unidirectional motor enable transistor.

Use Value: Dual-collector pinout (pins 2 & 4) improves current sharing and thermal spreading under 2 A stall conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	V_CEO = 100 V, I_C = 2 A, but TO-252 (DPAK) package; h_FE min = 30 (unranked); V_CE(sat) = 0.5 V @ 1 A	Higher saturation loss; less suitable for thermally constrained lamp/relay designs	Prefer where DPAK footprint is fixed and lower gain tolerance is acceptable
2SC4110T-E	V_CEO = 80 V, I_C = 2 A, same TP package and h_FE rank T; f_T = 100 MHz; V_CE(sat) = 0.15 V (typ)	Narrower voltage margin; identical pinout and layout compatibility	Select only if 80 V system compliance suffices and cost optimization is prioritized

Compared with MJD127G and 2SC4110T-E, the 2SC4135T-E delivers superior V_CE(sat) and guaranteed h_FE rank T in the TP package, making it optimal for thermally sensitive, high-reliability lamp and relay driver designs requiring consistent gain and low conduction loss.

Availability

2SC4135T-E is available at Aetrix Electronics and suitable for lamp drivers, relay drivers, and DC power supplies requiring stable component supply, long-term BOM continuity, and RoHS-compliant packaging.

Supply support for 2SC4135T-E 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The 2SC4135T-E belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliable medium-power switching in industrial controls, power conversion, and electromechanical interface circuits.

FAQ

What is the package type and lead count of the 2SC4135T-E?

The 2SC4135T-E uses the TP (TO-251) package with four terminals: pins 1 (Base), 2 (Collector), 3 (Emitter), and 4 (Collector). Pins 2 and 4 are internally connected collectors, enabling enhanced thermal and current-handling capability. This 4-pin variant is distinct from standard 3-pin TO-251 devices.

What does the 'T' suffix indicate in 2SC4135T-E?

The 'T' in 2SC4135T-E denotes the h_FE gain rank, specifying a DC current gain range of 200–400 at V_CE = −5 V and I_C = −100 mA. This tighter binning ensures predictable base drive requirements and consistent switching behavior across production units of the 2SC4135T-E.

Is the 2SC4135T-E suitable for switching applications above 1 MHz?

No - while the 2SC4135T-E has f_T = 120 MHz, its switching times (t_on = 80 ns, t_f = 50 ns) and Cob = 16 pF make it best suited for frequencies up to ~500 kHz. For >1 MHz operation, RF-optimized transistors with lower capacitance and faster recovery are recommended over the 2SC4135T-E.

Does the 2SC4135T-E require a heatsink in typical lamp driver use?

In continuous 1 A lamp driver operation, the 2SC4135T-E dissipates ~0.13 W (V_CE(sat) × I_C). With its 15 W P_C rating at T_c = 25°C and TP package thermal resistance, no external heatsink is needed if PCB copper area ≥ 2 cm² is used - a key advantage of the 2SC4135T-E in space-constrained designs.

How does the 2SC4135T-E compare to the 2SC4135S-E?

The 2SC4135T-E and 2SC4135S-E share identical package, absolute ratings, and electrical characteristics except for h_FE rank: S = 100–200, T = 200–400. The 2SC4135T-E provides higher and more consistent gain, reducing base drive variability and improving saturation margin - especially valuable in relay and lamp drivers where load current varies.

2SC4135T-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 100mA, 1A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TP

2SC4135T-E FAQ

1.How can I place an order for 2SC4135T-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC4135T-E 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 2SC4135T-E reliable?

The price and inventory of 2SC4135T-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4135T-E is usually 5 days.

3.What payment methods are accepted for 2SC4135T-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4135T-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC4135T-E?

2SC4135T-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC4135T-E 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 2SC4135T-E?

For technical support, including 2SC4135T-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4135T-E requirements.

6.How does Aetrix verify that 2SC4135T-E is sourced from the original manufacturer or authorized distributors?

All 2SC4135T-E 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 2SC4135T-E meets industry standards.

7.What is the process for return or replacement of 2SC4135T-E?

All 2SC4135T-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4135T-E, 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 2SC4135T-E part is unused and in its original packaging.

Return procedure for 2SC4135T-E:

1.Submit a request within 90 days.

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

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