DC-DC Converters…Isolated & Spike Protected
As well as voltage conversion, the Isolated Series provides input/output isolation, allowing use of negative ground electronics on off-highway vehicles which typically employ positive ground battery systems. May also be used as a Voltage Stabilizer for sensitive equipment.
ISP Series offer the benefits of an isolated converter (above) plus protection against line transients and voltage spikes typically caused by large DC motors and switching transients often encountered on forklifts, locomotives and light rail. A special circuit clamps input spikes to a safe level, protecting both the converter and the powered equipment.
This product series is further enhanced with extra rugged construction of case and internal components for severe vibration applications.
Isolated & ISP Series
- Reverse polarity protection
- Input fuse
- Output fuse
- Current limiting, short circuit proof output
- Automatic resetting thermal shutdown
- Input transient protection – ISP Series only
- High/low input voltage shutdown
- Polyurethane conformal coating on PC board
- Power “ON” light
- On/Off switch
Performance Specifications: Isolated and ISP Series
Output: 13.6 VDC (internally adjustable 12.6-14.5) or 24.5 VDC (or specify)
Ripple: 150 mV P-P Regulation: +/- 2% Line/Load Duty Cycle Ratings*: Intermittent – 20 minutes, max on time,20% duty, Continuous – 24 hours, 100% duty *Current limit set at approximately 105% of intermittent rating
Idle Current: (including power “on” indicator light) approx. 50 mA
Operating Temp:
Isolated Series: 0-50° C; derate linearly from 100% @ 40° C to 50% @ 50° C
ISP Series: see temperature rating curves (below)
Switching Frequency: 70Khz
Efficiency: 85% – typical.
DC Isolation: Input/Output, Input/Chassis, Output/Chassis):
Isolated Series: 250 VDC
ISP Series: 1,400 VDC
Isolated Series
| Model | Input Voltage |
Output Voltage |
Output Amps | Case Size |
Weight | ||
| Intermittent | Continuous | Lbs | Kg | ||||
| 12-12-12I | 10-16** | 13.6 | 12 | 8 | C-8 | 6 | 2.7 |
| 12-24-6I | 10-16** | 24.5 | 6 | 4 | C-8 | 6 | 2.7 |
| 12-12-35I | 10-16** | 13.6 | 35 | 20 | C-9 | 12 | 5.5 |
| 12-24-18I | 10-16** | 24.5 | 18 | 10 | C-9 | 12 | 5.5 |
| 48-12-6I | 20-56 | 13.6 | 6 | 6 | C-7 | 7 | 2.7 |
| 48-24-3I | 20-56 | 24.5 | 3 | 3 | C-7 | 7 | 2.7 |
| 48-12-12I | 20-56 | 13.6 | 12 | 8 | C-8 | 6 | 2.7 |
| 48-24-6I | 20-56 | 24.5 | 6 | 4 | C-8 | 6 | 2.7 |
| 48-12-18I | 20-56 | 13.6 | 18 | 10 | C-8 | 8 | 3.6 |
| 48-24-9I | 20-56 | 24.5 | 9 | 5 | C-8 | 8 | 3.6 |
| 48-12-35I | 20-56 | 13.6 | 35 | 20 | C-9 | 12 | 5.5 |
| 48-24-18I | 20-56 | 24.5 | 18 | 10 | C-9 | 12 | 5.5 |
| **11.5 VDC minimum start-up voltage, then operates @ 10-16 VDC from 1 amp minimum to full load | |||||||
ISP Series
| Model | Input voltage |
Output voltage |
Output Amps | Case Size |
Weight | ||
| Intermittent | Continuous | Lbs | Kg | ||||
| 36-12-6ISP† | 18-65 | 13.6 | 6 | 6 | C-7 | 5 | 2.3 |
| 36-24-3ISP | 18-65 | 24.5 | 3 | 3 | C-7 | 5 | 2.3 |
| 36-12-18ISP | 20-65 | 13.6 | 18 | 10 | C-6 | 8 | 3.6 |
| 36-24-9ISP | 20-65 | 24.5 | 9 | 5 | C-6 | 8 | 3.6 |
| 36-12-35ISP* | 20-65 | 13.6 | 35 | 20 | C-9 | 12 | 5.5 |
| 72-12-6ISP | 42-90 | 13.6 | 6 | 6 | C-7 | 5 | 2.3 |
| 72-24-3ISP | 42-90 | 24.5 | 3 | 3 | C-7 | 5 | 2.3 |
| 72-12-18ISP | 42-90 | 13.6 | 18 | 10 | C-6 | 8 | 3.6 |
| 72-24-9ISP | 42-90 | 24.5 | 9 | 5 | C-6 | 8 | 3.6 |
| 110-12-18ISP | 80-140 | 13.6 | 18 | 10 | C-6 | 8 | 3.6 |
| 110-24-9ISP | 80-140 | 24.5 | 9 | 5 | C-6 | 8 | 3.6 |
| † This model EMC and safety CE certified for sales within the European Union. *Build to order only – 10 unit minimum |
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Case Size
| Dimensions | ||||||
| Inches | Centimeters | |||||
| H | W | D | H | W | D | |
| C-6 | 6.0 | 4.6 | 13.7 | 15.2 | 11.7 | 34.8 |
| C-7 | 4.25 | 5.9 | 7.7 | 10.8 | 15.0 | 19.6 |
| C-8 | 4.25 | 5.9 | 14.0 | 10.8 | 15.0 | 35.6 |
| C-9 | 6.0 | 6.8 | 16.5 | 15.2 | 17.3 | 41.9 |
ISP Surge Protection
Transient Energy Capability:
36 VDC Input: 140 joules (Watt-Seconds) Peak Current, 2,000 Amps 72 & 110 VDC Input: 100 Joules (Watt-Seconds) Peak Current, 12,000 Amps
Temperature Specifications – ISP Series
Operating Temperature -40° C to +80°C Thermal shutdown @ 85° C Case Temperature
ISP Series Temperature/Amperage Derating Curves
Options
- Operation as a battery charger or parallel/ redundant operation (contact factory)
- Other “Special” output voltages available
High vibration mounting kit
The Extreme Vibration Mounting Kit is available to protect NEWMAR power converters from the extreme stresses of shock and vibration when mounted on high–vibration vehicles.
The kit (pictured here) replaces the standard vibration kit provided with the unit and fits into the unit’s mounting flange to act as a “super shock absorber” for electronics in high-vibe applications. It is available to fit all NEWMAR units from 2 to 70 lbs. Specify KIT–L for units which weigh 2–15 lbs. and Kit–H for units which weigh 16-70 lbs.
