diff --git a/hardware/bom/merlin-bci-rev0.csv b/hardware/bom/merlin-bci-rev0.csv
index af5ff4f..b2ee7af 100644
--- a/hardware/bom/merlin-bci-rev0.csv
+++ b/hardware/bom/merlin-bci-rev0.csv
@@ -1,7 +1,7 @@
 RefDes,Qty,Value / MPN,Package,Description,Notes
 U1,1,ADS1299IPAGR,TQFP-64,8-ch 24-bit delta-sigma EEG/ECG ADC,"TI; DVDD 1.8–3.6V, AVDD ±(2.5–5.25V)"
 U2,1,ESP32-WROOM-32E (4MB),SMD module (18×25.5mm),"Dual-core 240MHz, WiFi+BT MCU","brainflow CUSTOM_BOARD via WiFi; or use devkit during firmware dev"
-U3,1,MGJ2D121505SC,12-SMD SIP,"Isolated DC/DC 5V in → ±5V out, 2W","Murata; patient isolation barrier for AVDD/AVSS supply"
+U3,1,R2D-0505/R,SIP-7,"Isolated DC/DC 5V in → ±5V out, 2W","Recom; patient isolation barrier for AVDD/AVSS supply. Alt: Murata MEE1S0505SC. NOTE: MGJ2D121505SC is WRONG — it outputs +15V/−5V (gate driver), not ±5V"
 U4,1,REF3325AIDBZR,SOT-23-5,"2.5V precision ref/LDO, 50ppm/°C","TI; AVDD rail (patient side)"
 U5,1,TPS60403DBVR,SOT-23-5,"Inverting charge pump −2.5V (AVSS)","TI; no inductor; in from isolated +5V"
 U6,1,TLV1117-33DCYR,SOT-223,"3.3V 800mA LDO for DVDD + MCU","Input from isolated +5V rail"