Sentinel 150P Series

The Sentinel 150P is a range of highly efficient, high performance battery chargers designed for continuous float charge and standby power applications.

Switch Mode technology improves efficiency and low heat dissipation, wide supply voltage tolerance and low output ripple all within a compact and lightweight construction design. The chargers are configured for fast, accurate charging to give optimum battery life and reliability. Each charger’s output can be OEM-configured for optimal charging of different cell types: vented/wet lead acid, Calcium-Calcium, sealed VRLA (AGM or Gel), NiCd or custom requirements. The very smooth output (< 1% ripple) allows charging of sealed or vented batteries or use as a standalone power supply.

Specifications Downloads How To Order

Power Supply

  • Operating Voltage: 95 to 265 V AC
  • Operating Frequency: 47 – 63 Hz.

DC Charge Output

  • Nominal voltage: 12 or 24 VDC
  • Float/boost voltage: See Output Calibration table
  • Maximum current limit: 5 A
  • Voltage ripple: <1%
  • Line regulation: <2%
  • Load regulation: <2%


  • Control input: Digital (switch) input, close to –DC to activate, programmable function
  • Alarm output: Relay switched +DC, 1A max @ 30 VDC, programmable function


  • Protective cover: 1050 aluminum, 1.2 mm
  • Operating temperature: –22° F to 140° F  (–30° C to 60° C)
  • Storage temperature: –40° F to 140° F (–40° C to 60° C)
  • Humidity: 20% to 90% RH
  • Electrical safety: 2014/35/EU, UK SI 2016/1101 (EN IEC 61204-7:2018)
  • Electromagnetic compatibility: 2014/30/EU, UK SI 2016/1091 (EN 55032:2015, EN 61000-6-3:2007 + A1:2011, EN 61000-6-2:2019)
  • RoHS: 2011/65/EU, UK SI 2012/3032 (EN IEC 63000:2018)


Dimensions for reference only. Use actual product for mounting template. For safe heat dissipation, mount product in orientation shown, with minimum air-gap clearance of 1.5 in. (40 mm)  above and below and 1.0 in. (25 mm) at each side.

12 Volt Model 24 Volt Model
W 4.28 in. (108.6 mm)
H 5.31 in. (135 mm)
D 1.77 in. (45 mm) 2.17 in (55 mm)
Fixing Holes:
X 3.90 in. (99 mm)
Y 5.12 in. (130 mm)
F Ø 0.22 in. (5.65 mm)
1.45 lb. (0.65 kg) 1.65 lb. (0.75 kg)

 WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to or visit our California Proposition 65 page.

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

Part Number Model/Description Notes
42703810 SNTL150P1205CDLA Sentinel 150P, 12 V / 5 A nominal output
42703811 SNTL150P2405CDLA Sentinel 150P, 24 V / 5 A nominal output
42703820 SNTL150P1205CDALA As 42703810, plus alarm output and control input (programmable functions)
42703821 SNTL150P2405CDALA As 42703811, plus alarm output and control input (programmable functions)
42703900 SNTL-RTC sensor for remote temperature compensation feature, complete with 3 m / 9.8 ft lead assembly Non standard lengths available to special order.
42703825 SNTL150P-PCCONN programming kit Includes SNTL150P-PCSUITE software tool (PC compatible), USB-TTL interface and power/data connection leads.

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