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Toshiba Semiconductor TLP185(YH-TPL,SE — Optoisolators

TLP185(YH-TPL,SE Optocoupler, 3750Vrms, Transistor Output

MPNTLP185(YH-TPL,SE
End of Life

Toshiba TLP185(YH-TPL,SE single-channel DC-input transistor-output optocoupler, 3750Vrms isolation, 75% to 150% CTR at 5mA, 80V output, -55°C to 110°C, 6-SOP package, Tape & Reel.

$0.59Ref. price · indicative, final on quote
Toshiba Semiconductor TLP185(YH-TPL,SE datasheet (PDF)
Packaging6-SOIC (0.173", 4.40mm Width), 4 Leads
RoHSRoHS Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TLP185(YH-TPL,SE specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingSurface Mount
Voltage - isolation3750Vrms
Voltage - output80V
Voltage - forward (Vf)1.25V
Current - output (Channel)50mA
Current transfer ratio150% @ 5mA
Current - DC forward (If)50 mA
Operating temperature-55°C ~ 110°C
PackageTape & Reel (TR); Cut Tape (CT)
Case6-SOIC (0.173\", 4.40mm Width), 4 Leads
Channels1
Vce saturation300mV
Rise (Fall time)2µs, 3µs
Turn on (Turn off time)3µs, 3µs

Product details

Single-channel transistor-output optocoupler for 24V industrial isolation

The Toshiba TLP185(YH-TPL,SE is a single-channel DC-input transistor-output optocoupler in a 6-SOP surface-mount package. It provides 3750Vrms galvanic isolation between input and output, with a collector-emitter voltage rating of 80V and a continuous output current of 50mA per channel. The current transfer ratio (CTR) is specified at 75% minimum and 150% maximum when the input diode is driven at 5mA, giving a predictable gain window for saturating the output transistor in logic-level or low-power switching applications.

Temperature range and isolation — fit for 24V industrial signal isolation

The 3750Vrms isolation is sufficient for basic insulation in 24V industrial control systems (PLCs, motor drives, sensor interfaces) where galvanic separation between logic and field-side circuits is required. The transistor output with a 80V Vce(max) easily handles 24V supply rails with headroom for transients.

Switching speed and drive considerations

For higher-speed applications (e.g., isolated SPI or CAN), a digital isolator or high-speed optocoupler would be needed. The forward voltage is 1.25V typical at the input diode, compatible with 3.3V logic outputs when a current-limiting resistor is used.

It is RoHS compliant.

Frequently asked questions

Is TLP185(YH-TPL,SE) suitable for 24V industrial signal isolation?

Yes. With 3750Vrms isolation and a 80V maximum output voltage, it provides adequate galvanic isolation for 24V industrial control signals. The transistor output can switch 24V logic levels directly, and the -55°C to 110°C temperature range covers factory-floor environments.

What is the current transfer ratio (CTR) for TLP185(YH-TPL,SE) at 5mA input?

At 5mA input current, the CTR is specified as 75% minimum and 150% maximum. This means the output collector current will be between 3.75mA and 7.5mA when the input diode is driven at 5mA.

Can I use TLP185(YH-TPL,SE) as a direct replacement for a failing TLP185 without suffix?

The TLP185(YH-TPL,SE is a specific CTR bin (YH rank) within the TLP185 family. It is pin-compatible with other TLP185 suffix variants (e.g., GRH, BLL, TPL) that share the same package and electrical ratings. The key difference is the CTR range: the YH bin offers 75% to 150% at 5mA, which may differ from the original part's CTR bin. Verify the original part's CTR requirement before substituting.

Can TLP185(YH-TPL,SE) be used for 3.3V logic input?

Yes. The input diode forward voltage is 1.25V typical, so a 3.3V logic output can drive it through a current-limiting resistor (e.g., 390Ω for 5mA). The CTR at 5mA is well-characterized, ensuring reliable switching.