First 50 will replace Nanchang Q-5.
Reference Link:-
PAF Nanchang Q-5C
Lets compare JF-17 with Q-5, how much its improved the capability of PAF.
PAF Nanchang Q-5/ A-5C (NATO reporting name Fanton)
PAF using export version of Q-5 with more western gears upon customers' requests, such as flight instrumentation made by
Rockwell Collins, and western ejection seat made by
Martin-Baker. Added the capability to
fire western missiles such as the R550 Magic or AIM-9 Sidewinder.
The A-5C was modified by China to meet the PAF requirements in the special
role of close air support as well as its
primary role of ground-attack and
deep penetration strike. Some of the PAF A-5Cs have also reportedly been modified to carry a single
5-20 kT nuclear bomb under the centreline along with two external wing mounted fuel drop tanks. It is said that in the event of a nuclear attack, the
PAF A-5Cs could be used to deliver battlefield nuclear bombs over advancing armoured columns. They could also reportedly be used for
conventional as well as nuclear attack on Indian air bases, missile launch sites and strategic installations located within 1,000 km from the Pakistani border with air defence escort provided by PAF F-7MP fighter interceptors.
Strengthened landing gear and an extra pair of under fuselage hard points were fitted, and some Navy aircraft were fitted with Doppler radar compatible with their role as sea-skimming delivery platforms for the C-801 Anti-ship Missiles (AshMs) and under fuselage torpedoes. Further enhancement of the Q-5I's offensive capabilities, in the form of an extra pair of under wing hard points and a new gun/bomb-sighting system, led in the mid-1980s to the Q-5IA; the addition of RWR resulted in the Q-5II.
Exported to Bangladesh and Pakistan. Bangladesh Air Force's A-5Cs have been upgraded in 2008 to fire LS-6 and LT-2 ground attack munitions
giving them advanced strike capability.
Loaded weight: 9,486 kg (20,910 lb)
Max takeoff weight: 11,830 kg (26,080 lb)
Maximum speed: Mach 1.12
Combat radius:
On lo-lo-lo mission: 400 km (220 NM, 250 mi) with maximum payload
On hi-lo-hi mission: 600 km (320 NM, 370 mi (600 km))
Thrust/weight: 0.63
Hardpoints: 10 (4× under-fuselage, 6× under-wing) with a capacity of 2,000 kg (4,400 lb)
Rockets: 57 mm, 90 mm, 130 mm unguided rocket pods
Missiles: PL-2, PL-5, PL-7 air-to-air missiles
Bombs:
50 kg, 150 kg, 250 kg, 500 kg unguided bombs
BL755 cluster bombs
Matra Durandal anti-runway bombs
Others:
Fuel tanks: 105 gal, 200 gal, 300 gal
PAF JF-17
Loaded weight: 9,100 kg including 2× wing-tip mounted air-to-air missiles (20,062 lb)
Max takeoff weight: 12,700 kg (28,000 lb)
Maximum speed: Mach 1.8 (1,191 knots, 2,205 kph)
Combat radius: 1,352 km (840 mi)
Thrust/weight: 0.99
Hardpoints: 7 in total (4× under-wing, 2× wing-tip, 1× under-fuselage) with a capacity of 3,629 kg (8,000 lb) external fuel and ordnance,
Rockets: 57 mm, 90 mm unguided rocket pods
Missiles:
Air-to-air missiles:
Short range: AIM-9L/M, PL-5E, PL-9C
Beyond visual range: PL-12 / SD-10
Air-to-surface missiles:
Anti-radiation missiles
Anti-ship missiles: AM-39 Exocet
Cruise missiles: Ra'ad ALCM
Bombs:
Unguided bombs:
Mk-82, Mk-84 general purpose bombs
Matra Durandal anti-runway bomb
CBU-100/Mk-20 Rockeye anti-armour cluster bomb
Precision guided munitions (PGM):
GBU-10, GBU-12, LT-2 laser-guided bombs
H-2, H-4 electro-optically guided, LS-6 satellite-guided glide bombs
Satellite-guided bombs
Others:
Up to 3 external fuel drop-tanks (1× under-fuselage 800 litres, 2× under-wing 800/1100 litres each) for extended range/loitering time
Avionics
NRIET KLJ-7 multi-mode fire-control radar
NVG compatible glass cockpit
Helmet Mounted Sights/Display (HMS/D)
Infra-Red Search and Track (IRST)
Externally mounted avionics pods:
Self-protection radar jammer pod
Day/night laser designator targeting pod
Forward Looking Infra-Red (FLIR) pod
___________________________________________________________
Summary
Long Distance & more combat radius
More Speed
Latest Avonincs and weapons.
Advanced Air to ground local and imported weapons
Modren Radar.
Carry Nuclear weapons
JF-17 is much advanced and enhanced the capabilities of ground attack but I think A-5 should be offered to PN