Endurastar J4K50

HGST Endurastar drives are designed to guard and deliver your data under the harshest environmental conditions. Offered in capacities up to 50GB, the Endurastar J4K50 and N4K50 deliver a wider temperature range and improved altitude range. Endur¬astar J4K50 is designed to operate in the most severe conditions, at temperatures of -30°C to +85°C and altitudes of -300 to +5000 meters. Endurastar N4K50 offers a temperature range of -16°C to +70°C at altitudes of -300 to 3000 meters. Endurastar models continue to leverage shock sensor technology for enhanced reliability and the proven technology of HGST’s traditional notebook PC hard drives to deliver quiet acoustics and excellent performance.

Model(s)	HEJ425050F9AT00 HEJ425040F9AT00 HEJ425030F9AT00	HEN425050F9AT00 HEN425040F9AT00 HEN425030F9AT00
Interface	ATA-6
Capacity (GB)	50 / 40 / 30
Sector size (variable, Bytes/sector)	512
Recording zones	24
Data Heads (physical)	2
Data Disks	1
Max areal density (Gbits/sq. in.)	86.1
Performance
Data buffer (MB)	8
Rotational Speed (RPM)	4260
Latency Average (ms)	7.04
Media transfer rate (Mbits/sec, max)	388
Interface transfer rate (MB/sec, max)	100 Ultra DMA mode-5 16.6 PIO mode-4
Seek Time (read, ms, typical)	13
Reliability
Error Rate (non-recoverable, bits read)	< 1 per 10^13 bits transferred
Start/stops	600,000
Availability (hrs/day x days/wk)	24x7
Acoustics
Idle (Bels)	2.4
Power
Requirement	+5 VDC (+/-5%)
Physical size
Z-height (mm)	9.5
Dimensions (width x depth, mm)	70 x 100
Weight (g, max)	95
Environmental (operating)
Ambient temperature	-30º to 85ºC	-16º TO 70ºC
Shock (half-sine wave)	250G (2ms)
Vibration	Up to 3G (10-500Hz)
Environmental (non-operating)
Ambient temperature	-40º to 95ºC
Shock (half-sine wave)	800G (1ms)
Vibration	Up to 5G (10-500Hz)

* One GB is equal to one billion bytes when referring to hard drive capacity. Accessible capacity may be less.
** Portion of buffer capacity used for drive firmware.
*** Intended for less than 20 percent duty cycle industrial applications and other non mission critical applications.

Highlights
• 50GB HDD targeted for use in automotive applications
67% more than prior model
• Expanded operating temperature range from -30° C to +85° C
• Operating altitude range of up to 5000 meters
• 4th generation product, based on proven technology
Applications / Environments
• Automotive
• GPS navigation systems
• Applications running in hot and humid climates
• Industrial applications

Technical Library Content
Product Documentation

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