LED48-350
Ultrathin 8.8mm 48V DIN Rail Constant Current DC/DC Converter with 350mA output current
| Quantity | Unit Price | Saving |
| 1+ | EUR 23.00 | — |
| 25+ | EUR 19.99 | -13% |
| 100+ | EUR 17.35 | -25% |
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Key Features
- Constant Current Buck converter 8.8mm DIN Rail width
- 350mA output current
- Wide input voltage:
- Uin,min=5V
- Uin,max=48 V
- Input reverse polarity protection
- Output short proof
- Power Good LED
Product Description
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Logistics Data
| Weight | 0.03 kg |
| Dimensions | 89 x 9 x 53 mm |
| Country of Origin | Germany |
| HS Code | 8504409590 |
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Have a question about this product? Our engineering team is here to help.
Constant current only — it is not a voltage-regulated supply. The LED48-350 ordercode is rated 350 mA (typ 360 mA, spec range 330–385 mA); the LED48-500 variant is rated 500 mA (typ 500 mA, range 450–530 mA). Output voltage floats up to U_in − 2 V; the device is not usable as a general-purpose DC/DC converter.
5 V to 48 V DC. The 5 V minimum is unusually low for a 48 V-class driver, making the LED48-xxx usable on 12 V and 24 V bus systems as well as 48 V. The maximum LED string voltage is U_in − 2 V — so at 5 V input the string can be at most ~3 V (a single high-power LED).
Stable to within ~10 % across the full string-voltage range. At U_in = 48 V the LED48-350 current falls from ~382 mA at 5 V string voltage to ~340 mA at 45 V (Figure 2). For most luminaire designs this is acceptable; applications needing tighter accuracy should compensate in the thermal and photometric calculations.
Efficiency rises strongly with string voltage. At U_in = 48 V the LED48-350 reaches ~70 % at 5 V string voltage and ~97 % at 45 V. Long high-voltage strings extract nearly all input power as light; single-LED or low-voltage strings waste a significant fraction as converter heat.
Yes to both. Reverse polarity protection up to -48 V DC at the input, indefinite short-circuit protection at the output, indefinite open-circuit safe operation. Both input (2× SMAJ26A) and output (SMAJ48A) TVS diodes clamp transients — the output TVS notably protects against inductive spikes when the LED string is hot-disconnected.
No — fully self-contained. The 350 mA current level is fixed in hardware; there is no dimming input, enable pin, or analogue control interface. For PWM dimming, switch the input voltage externally; the device itself provides no dimming function. Contact DPS for a dimmable or adjustable-current variant.
-40 °C to +50 °C with no derating curve stated, and no electrolytic capacitors anywhere in the design. Removing electrolytics eliminates the primary ageing mechanism in switching converters, supporting long service life in sealed or hot luminaire enclosures. The 15 µF input capacitance is implemented with non-electrolytic types.
Yes — DPS customises output current level, input voltage range, and protection thresholds for production volumes. An engineering fee applies; contact DPS to scope your variant. Standard catalogue variants (350 mA, 500 mA) ship from stock.