WRB2412S-3WR2

Part: WRB2412S-3WR2 (WRB_S-3WR2 series)

Type: Isolated DC-DC Converter Module (single output, regulated)

Description: 3 W isolated regulated DC-DC module with 18–36 V input (24 V nominal), 12 V output at up to 250 mA, 1500 VDC isolation and 82% min / 86% typ efficiency at full load.

Operating Conditions:

• Supply voltage: 18–36 VDC (24 V nominal)
• Operating temperature: -40 to +85 °C (output at full load)
• Output: 12 VDC, 13–250 mA (light load min to full load max)

Absolute Maximum Ratings:

• Max input voltage (24 V input module): 50 Vdc (min -0.7 Vdc; no reverse-polarity protection)
• Max output power: 3 W
• Storage temperature: -55 to +105 °C
• Pin soldering heat resistance: 300 °C (1.5 mm from case, 10 s)

Key Specs:

• Efficiency @ full load: 82% min / 86% typ
• Max capacitive load: 680 μF
• Output voltage accuracy (5–100% load): ±1% typ, ±3% max
• Line regulation: ±0.2% typ, ±0.5% max; load regulation (5–100% load): ±0.6% typ, ±1% max
• Ripple & noise (20 MHz bandwidth): 35 mVp-p typ, 75 mVp-p max
• Switching frequency: 250 kHz typ, 300 kHz max
• Isolation: 1500 VDC min (1 min, leakage <1 mA); insulation resistance 1000 MΩ min at 500 VDC; isolation capacitance 120 pF typ
• MTBF: 3500 k hours min (MIL-HDBK-217F @ 25 °C)
• Startup voltage (24 V input module): 11 V min, 16 V typ, 18 V max
• Startup surge current Iave (24 V series): 325 mA

Features:

• 2:1 wide voltage input
• Low quiescent current and high conversion efficiency
• Built-in soft-start
• Output short-circuit protection with continuous self-recovery
• Remote on/off via Ctrl pin
• 1500 VDC isolation
• Custom specifications available on request

Applications:

• Distributed power systems with limited board space
• Systems with wide input voltage variation (≤ 2:1)
• Applications requiring input-output isolation (≤ 1500 VDC)
• Designs requiring stable output voltage and low ripple noise

Package:

• Encapsulated module, 21.90 × 11.20 × 9.20 mm, 4.9 g typ, black UL94-V0 flame-retardant epoxy case

• 2:1 wide voltage input

• Low quiescent current and high conversion efficiency

• Built-in soft-start technology

• Output short-circuit protection, self-recovery

• Output can be shut down

• Isolation voltage 1500VDC

• Special specification products can be designed according to customer requirements

Exceeding the following limit values may damage the module; the module must not operate continuously at limit values.

3 This series of modules does not have input reverse-polarity protection. Input polarity reversal is strictly prohibited, as it will cause irreversible damage to the module.