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FMMT491ATA The FMMT491ATA is a 40V NPN silicon planar medium power transistor in a SOT-23-3 package, rated for 1A continuous collector current and 500mW power dissipation.
Mfr Part #:

FMMT491ATA

Available from 6 distributors
Mfr Name: Diodes Incorporated
Diodes Incorporated
The FMMT491ATA is a 40V NPN silicon planar medium power transistor in a SOT-23-3 package, rated for 1A continuous collector current and 500mW power dissipation.
✓ Total Stock: 1,625,260 pcs
$ Price Range: $0.31

FMMT491ATA Available from 6 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Optech Co.,Limited ✓
Non-Authorised Inventory information
1,606,020 pcs
On Request
1606020 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
Non-Authorised Inventory information
6,000 pcs
On Request
6000 pcs On Request 1 On Request On Request 0948+ On Request On Request
PROSOFT ELECTRONICS ✓
Non-Authorised Inventory information
5,000 pcs
On Request
5000 pcs On Request 1 On Request On Request 24+ On Request On Request
Bristol Electronics ✓
Non-Authorised Inventory information
2,830 pcs
On Request
2830 pcs On Request 1 On Request On Request On Request On Request On Request
Braun Electronic Components ✓
Non-Authorised Inventory information
2,810 pcs
$0.31 ℹ
Qty Price
0+ 0.31
2810 pcs $0.31
QtyPrice
0+ 0.31
1 On Request On Request On Request On Request On Request
Chanetech ✓
Non-Authorised Inventory information
2,600 pcs
On Request
2600 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

FMMT491ATA Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Frequency
Halogen Free
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Tape & Reel
Tape Width
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
Weight
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FMMT491ATA Description

Short technical summary and product information.

The FMMT491ATA is a 40V NPN silicon planar medium power transistor manufactured by Diodes Incorporated. It is designed for general-purpose switching and amplification applications requiring moderate current and voltage handling in a compact surface-mount package.

 

Key electrical specifications include a maximum collector-emitter voltage (VCEO) of 40V, a continuous collector current rating of 1A, and a peak pulse collector current of 2A. The device offers a minimum DC current gain (hFE) of 300 at 500mA and 5V, and a typical transition frequency of 150MHz. The maximum Vce saturation voltage is 500mV at 100mA base current and 1A collector current, with a typical equivalent on-resistance of 195mΩ.

 

The transistor is housed in a molded plastic SOT-23-3 package with matte tin plated leads, rated UL 94V-0 for flammability. It supports an operating junction temperature range of -55°C to 150°C and has a maximum power dissipation of 500mW. The device is RoHS3 compliant, lead-free, and halogen-free (green device). It is also qualified to AEC-Q101 standards for high reliability, making it suitable for automotive applications.

FMMT491ATA Quick Information

Product Type: Bipolar Junction Transistor (BJT)
Series: FMMT491A
Canonical Name: FMMT491ATA 40V NPN Silicon Planar Medium Power Transistor
Subcategory: Single BJT Transistor

FMMT491ATA Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): Level 1 (Unlimited)
REACH Status: REACH Unaffected
Lead Free: Yes

FMMT491ATA Estimated Pricing

Qty Low High
1+ $0.52 $0.52
10+ $0.32 $0.32
100+ $0.20 $0.20
500+ $0.15 $0.15
1,000+ $0.14 $0.14
3,000+ $0.14 $0.14

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

FMMT491ATA Features

  • 40V collector-emitter voltage rating.
  • 1A continuous collector current capability.
  • 500mW maximum power dissipation.
  • Minimum DC current gain of 300.
  • AEC-Q101 qualified for automotive reliability.

FMMT491ATA Applications

  • General purpose switching and amplification.
  • Automotive electronic control modules.
  • Load driver and relay driver circuits.
  • DC-DC converter and power management.

FMMT491ATA FAQs

7 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage (VCEO) of the FMMT491ATA?

The maximum collector-emitter voltage (VCEO) is 40V.

What is the continuous collector current rating of the FMMT491ATA?

The continuous collector current (IC) is rated at 1A maximum.

What is the package type of the FMMT491ATA?

The FMMT491ATA is supplied in a surface-mount SOT-23-3 package (TO-236-3, SC-59).

What is the operating temperature range of the FMMT491ATA?

The operating junction temperature range is -55°C to 150°C.

Is the FMMT491ATA RoHS compliant?

Yes, the FMMT491ATA is RoHS3 compliant and totally lead-free.

What is the DC current gain (hFE) of the FMMT491ATA?

The minimum DC current gain (hFE) is 300 at a test condition of Ic=500mA and Vce=5V.

Is the FMMT491ATA qualified for automotive applications?

Yes, the FMMT491ATA is qualified to AEC-Q101 standards for high reliability automotive use.

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