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onsemi 6N135SVM — Optoisolators
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RoHS Compliant · Lead-Free EIA-481 Standard
onsemi / Optoisolators

6N135SVM Optoisolator – onsemi, 5000Vrms, 8-SMD Gull Wing

MPN 6N135SVM
End of Life Spot Stock · 24-48h Dispatch 100% Original Sealed

onsemi 6N135SVM, single-channel DC-input optocoupler, transistor with base output, 5000Vrms isolation, 8-SMD Gull Wing package, -40°C to 100°C operating range.

In Stock: 1,998 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$1.94 / pc
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Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$1.94
10+ pcs
$1.75
30+ pcs
$1.59
100+ pcs
$1.44
500+ pcs
$1.34
1,000+ pcs
$1.26
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[SPEC] Essential Parameters Snapshot Full Specifications (14)
Package / Case 8-SMD, Gull Wing
Output / Current 8mA
ALT
Facing long factory lead times or allocation on 6N135SVM? Verified pin-compatible alternatives available with active Shenzhen stock and 100% solder-ready footprint match.
View Pin Alternates (3)

Full Technical Specifications

14 Parameters
6N135SVM specifications
Parameter / AttributeSpecification / Value
Input typeDC
Output typeTransistor with Base
MountingSurface Mount
Voltage - isolation5000Vrms
Voltage - output20V
Voltage - forward (Vf)1.45V
Current - output (Channel)8mA
Current transfer ratio50% @ 16mA
Current - DC forward (If)25 mA
Operating temperature-40°C ~ 100°C
PackageTube
Case8-SMD, Gull Wing
Channels1
Turn on (Turn off time)230ns, 450ns
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for 6N135SVM?

Package: DIP-8 / SOP-8 · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 97%
Supply Chain & Allocation Reality:

The 6N137 is the industrial signal isolator of servo drives, PLC I/O, gate-drive interfaces and serial links: a 10 megabit logic-gate optocoupler with a Schottky-clamped open-collector output, an enable pin, and the same 8-pin body as half the opto universe. Two things make it a page of its own. First, the 6N136 it shares a family name with is a 1 megabit phototransistor part whose pins 5, 6 and 7 mean something else entirely - same body, different species. Second, the enable pin: floating it disables the output to a permanent high, which is the number one mystery of hand-wired 6N137 circuits. The 2500V isolation, ~45-75ns delays and the HCPL-2601/2611 noise-shielded versions complete the working picture.

Verified Pin-Compatible Replacements (3 verified alternatives)

6N136 LiteOn / onsemi / Isocom DIP-8
Functional Equivalent
Availability & Target Pricing:

The 1Mbps Phototransistor Sibling

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The phototransistor version in the same 8-pin body: no VCC pin, no enable pin, CTR-based output with a base pin (7) for a speed resistor, and about one megabit of bandwidth.

No logic supply at all - the output side is a transistor, not a gate: the pin that is VCC on a 6N137 is unused on the 6N136.

Compatibility & Drop-In Notes: The honest use of this card: replacing a slow part with the 10Mbps logic-gate family is an upgrade that needs decoupling and a pull-up; replacing the 137 with the 136 is a redesign that loses the enable, the logic output and the speed.
Package & Solder Footprint: Read the pin drawing, never the family name - the LED side matches, the output side does not.
Shenzhen Warehouse Stock & MOQ: Stocked; the slow lane with its differences stated.
Request Volume Quote for 6N136 Compare 6N135SVM vs 6N136 Spec Matrix
HCPL-2601 Broadcom (HP lineage) DIP-8
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Noise-Shielded Same Function

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The same 10 megabit logic-gate design from the HP/Avago lineage with a specified improved internal noise shield - the minimum common-mode immunity is a guaranteed number where the 6N137 datasheets lean on typicals.

Same 5V logic side and enable-pin dance; the HCPL-2611 raises the guaranteed CMR further for the nastiest motor-drive corners.

Compatibility & Drop-In Notes: The choice rule: where a 6N137 works, the 2601 works identically; where a 6N137 glitches mysteriously near power switching, the specified-immunity part is the repair - not a faster pull-up.
Package & Solder Footprint: Pin-shared with the 6N137.
Shenzhen Warehouse Stock & MOQ: Stocked; the datacom-name version of the same socket.
Request Volume Quote for HCPL-2601 Compare 6N135SVM vs HCPL-2601 Spec Matrix
EL2601 / ICPL2601 Everlight / Isocom (clone lineage) DIP-8 / SOP-8
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Volume Clone Shelf

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The industry clones of the 2601/6N137 function: 10 megabit, open-collector Schottky-clamped output, enable input, same pin map - at the price points that put them in serial and adapter hardware.

The enable pin carries its own discipline: about 5.5V maximum and never more than 500mV above VCC - a rule worth stating because it is the first pin killed in hand-built rigs.

Compatibility & Drop-In Notes: The clones exist because the original function is generic; the buying question is only whether the lot behind the price holds the datasheet numbers.
Package & Solder Footprint: Pin map identical to the 6N137/2601 line.
Shenzhen Warehouse Stock & MOQ: Volume pricing; sample-screened lots on request.
Request Volume Quote for EL2601 / ICPL2601 Compare 6N135SVM vs EL2601 / ICPL2601 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • The enable pin (pin 7) has a truth table, not a default: tied high the output follows the input inverted (input high gives output low); floating or tied low it disables to a permanent high. The always-high 6N137 is almost always an orphaned enable pin.
  • The output is open-collector and inverting: it sinks when the input LED is on - a pull-up resistor is a functional part of the circuit, and positive-logic assumptions about the output polarity need the inversion designed in.
  • The 6N136 shares the body and moves the pins: on the 136, pins 5/6/7 are Emitter/Collector/Base (phototransistor world, no VCC, no enable); on the 137 they are GND/Output/Enable. Never swap across the two by position.
  • VCC (pin 8) is 4.5V to 5.5V with the 0.1uF bypass to pin 5 as part of the design: a 10 megabit part without its decoupling produces the intermittent glitches that get blamed on the processor.
  • The speed ladder inside the family is real: 6N135/6N136 are 1 megabit phototransistor parts; 6N137/6N138/6N139 are the 10 megabit logic-gate row, with 138/139 tuned for lower input current. Match the drive current and the bandwidth to the job.
  • Where it sits matters: these parts live between a controller and a power stage, and their specified common-mode immunity (the HCPL-2601/2611 grades) is the difference between a clean drive and a phantom fault in welder and servo environments.
Frequently Asked Technical Questions

Q: Can a 6N136 replace a 6N137?

A: Same 8-pin body, different species: the 6N136 is a 1 megabit phototransistor part with no VCC and no enable, and its pins 5, 6 and 7 are Emitter, Collector and Base where the 6N137 has GND, Output and Enable. The LED side matches; nothing else should be assumed.

Q: Why is my 6N137 output always high?

A: Two candidates: the enable pin (7) is floating or tied low, which disables the output to a permanent high, or the open-collector output is missing its pull-up resistor. Both are wiring facts, not part failures.

Q: What is the difference between the 6N137 and the HCPL-2601?

A: The same 10 megabit logic-gate function and pinout; the HCPL-2601 adds a specified improved noise shield (guaranteed common-mode immunity where the 6N137 relies on typicals), and the HCPL-2611 raises that guarantee further - the motor-drive grade of the same socket.

Technical Details & Description

Isolation rating and where it fits

The 6N135SVM: The 5000Vrms isolation is the deciding parameter for this optocoupler — it provides galvanic separation between a low-voltage control side and a high-voltage power stage, typical in motor drives, industrial PLC I/O modules, and switch-mode power supply feedback paths. The 8-SMD Gull Wing package is a surface-mount footprint that reflows onto a PCB without through-hole assembly, though the gull-wing leads are visible for post-solder inspection.

Current transfer ratio and switching speed

The current transfer ratio spans 7% minimum to 50% maximum at a forward current of 16 mA. That 7% floor is the gain the designer must guarantee across temperature and device variation — if the downstream logic needs a 2.5 V swing into a 10 kΩ load, the 8 mA output current capability per channel sets the pull-up resistor ceiling. Typical turn-on time is 230 ns, turn-off 450 ns, fast enough for 1 MHz data rates but not for high-speed isolated communication like Ethernet.

onsemi lists the 6N135SVM as Active and ROHS3 compliant.

The DC input type means the LED is driven by a steady forward current, not an AC waveform.

Frequently asked questions

What is the current transfer ratio of 6N135SVM?

The CTR is 7% minimum and 50% maximum, both specified at a forward current of 16 mA. This range defines the guaranteed gain across temperature and device variation.

What is the closest functional second-source to 6N135SVM?

The 6N136SVM is a direct peer in the same onsemi family — same 8-SMD Gull Wing package, same 5000Vrms isolation, same 8 mA output current, but with faster switching (250 ns on, 260 ns off) and a different CTR specification. Confirm the CTR and timing requirements before substituting.

6N135SVM
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