Mfr Part #:

TLP521-2GB

Mfr Name: Toshiba

TLP521-2GB is a dual-channel optoisolator from Toshiba with transistor output. It features 50mA forward current, 100-600% CTR, and 1.15V typical forward voltage.

✓ Total Stock: 60,878 pcs

$ Price Range: $0.33

TLP521-2GB Available from 5 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Smaxon Electronics ✓ Non-Authorised Inventory information	59,712 pcs On Request	59712 pcs	On Request	1	On Request	On Request	11+15+	On Request	On Request
Optech Co.,Limited ✓ Non-Authorised Inventory information	1,000 pcs On Request	1000 pcs	On Request	1	On Request	On Request	12+	On Request	2026-06-03 08:15:22
MW.FEP S.p.A. ✓ Non-Authorised Inventory information	156 pcs On Request	156 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Partservice ✓ Non-Authorised Inventory information	10 pcs On Request	10 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
HK XINYUANXIN ELECTRONIC TECH LIMITED ✓ Non-Authorised Inventory information	On Request On Request	On Request	On Request	1	On Request	On Request	On Request	On Request	On Request

TLP521-2GB Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Toshiba

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TLP521-2GB Description

Short technical summary and product information.

The TLP521-2GB is a dual-channel optoisolator from Toshiba featuring a phototransistor output. Each channel provides a typical forward voltage of 1.15V and a maximum forward current of 50mA. The current transfer ratio ranges from 100% to 600% at 1mA test condition, ensuring reliable signal isolation. The device offers typical rise and fall times of 4µs and 3µs respectively, suitable for moderate-speed switching applications. The maximum Vce saturation voltage is 400mV, indicating low output voltage drop. This optoisolator is designed for use in isolation interfaces, signal transmission, and noise suppression in industrial and consumer electronics.

TLP521-2GB Quick Information

Product Type: Optoisolator

Canonical Name: TLP521-2GB Optoisolator, Transistor Output

Subcategory: Transistor Output

TLP521-2GB Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

TLP521-2GB Estimated Pricing

Qty	Low	High
1+	$0.33	$0.33

Estimated market price range - modelled values for guidance only, not live distributor offers.

TLP521-2GB Features

Dual-channel optoisolator with transistor output.
Maximum forward current of 50 mA.
Current transfer ratio from 100% to 600%.
Typical forward voltage of 1.15 V.
Fast rise and fall times of 4 µs and 3 µs.

TLP521-2GB Applications

Used for signal isolation in industrial controls.
Suitable for logic-level interface circuits.
Ideal for noise suppression in digital systems.
Applied in power supply feedback loops.

TLP521-2GB FAQs

7 frequently asked questions generated from this part’s specifications.

What is the maximum forward current?

50 mA.

What is the current transfer ratio range?

100% to 600% at 1mA.

What is the typical forward voltage?

1.15V.

What are the rise and fall times?

4µs rise, 3µs fall.

What is the maximum Vce saturation?

400mV.

What is the output current per channel?