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Toshiba Semiconductor TLP385(D4-GB,E — Optoisolators
Toshiba Semiconductor

TLP385(D4-GB,E Toshiba Optoisolator 5000Vrms 4-SOIC Active

MPNTLP385(D4-GB,E
End of Life

Toshiba Semiconductor TLP385(D4-GB,E, 1-channel DC-input transistor-output optocoupler, 5000Vrms isolation, CTR 100%–600% at 5mA, -55°C to 110°C, 6-SOIC 4-lead surface-mount package, Tube.

$0.54Ref. price · indicative, final on quote
TLP385(D4-GB,E datasheet
Packaging6-SOIC (0.173", 4.40mm Width), 4 Leads
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

TLP385(D4-GB,E Technical Specifications
ParameterValue
Input typeDC
Output typeTransistor
Mounting typeSurface Mount
Voltage - isolation5000Vrms
Voltage - output80V
Voltage - forward (Vf)1.25V
Current - output (Channel)50mA
Current transfer ratio600% @ 5mA
Current - DC forward (If)50 mA
Operating temperature-55°C ~ 110°C
PackageTube
Case6-SOIC (0.173\", 4.40mm Width), 4 Leads
Number of channels1
Vce saturation300mV
Rise (Fall time)2µs, 3µs
Turn on (Turn off time)3µs, 3µs

Product details

The TLP385(D4-GB,E delivers 5000Vrms isolation in a 4-lead SOIC footprint — enough for reinforced insulation in mains-referenced PSU feedback loops and PLC digital input modules. The CTR floor of 100% at 5mA forward current (max 600%) means the LED drive can be set conservatively without losing output saturation at 80V/50mA, even over the full -55°C to 110°C range.

Switching speed and saturation — timing margin for digital isolation

Typical turn-on/turn-off times are 3µs each, with rise/fall of 2µs/3µs. That puts the usable switching frequency around 100 kHz for logic-level signals — adequate for 24V PLC input debounce, relay coil drive, and isolated I²C bit-banging. The 300mV max Vce(sat) at 50mA output keeps the low-side voltage drop inside a logic-high threshold for 3.3V or 5V domains.

Package and mounting — 4-lead SOIC vs 6-lead trade-off

The two unused centre pins (2,3) are omitted, which increases creepage distance between input and output for the 5000Vrms rating. Surface-mount assembly with standard SOIC-6 solder paste stencil; no exposed pad to worry about.

Lifecycle and supply posture

RoHS compliant. Sourced per RFQ against your BOM quantity; no stock-holding claim on this page.

Frequently asked questions

What is the CTR of TLP385(D4-GB,E?

Current transfer ratio is 100% minimum, 600% maximum, both specified at IF=5mA. That wide range gives flexibility in LED drive current — a 1mA forward current still guarantees at least 20% CTR, enough to saturate the output transistor at low collector current.

Can TLP385(D4-GB,E replace TLP185?

Not directly — the TLP185 is a 4-pin SSOP with lower isolation (3750Vrms) and a different CTR bin. The TLP385(D4-GB,E has 5000Vrms and a wider CTR range, so it can work as a functional upgrade if the footprint (SOIC-4 vs SSOP-4) and creepage requirements align. Verify the pad layout — the TLP385 uses a 6-SOIC body with 4 leads, so the PCB land pattern is different from the TLP185's 4-pin SSOP.