My Inquiry
My Account
Vishay Semiconductor Opto Division VEMT3705X02-GS08
- Part No.:
- VEMT3705X02-GS08
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Phototransistors
- Package:
- 2-SMD, J-Lead
- Datasheet:
-
VEMT3705X02-GS08.pdf
- Description:
- PHOTO TRANS. SMD PLCC2 AECQ-101
- Quantity:
- Payment:
- Shipping:
Inventory:1,137
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VEMT3705X02-GS08 from Vishay Semiconductors is a high-speed silicon NPN epitaxial planar phototransistor in a surface-mount PLCC-2 package, rated for 20 V VCEO, 0.6 mA typical collector light current (Ica) at 940 nm, ±60° angle of half sensitivity, and AEC-Q102 qualification-used in optical position sensing and encoder feedback loops.
For engineers reviewing the VEMT3705X02-GS08 datasheet, VEMT3705X02-GS08 pinout, VEMT3705X02-GS08 application, or VEMT3705X02-GS08 equivalent, key selection criteria include spectral response range (480–1050 nm), fast rise/fall times (14/21 μs), thermal resistance (400 K/W), and MSL 3 moisture sensitivity compliance.
Technical Context
This phototransistor operates as a light-controlled current switch with NPN bipolar junction structure, optimized for visible-to-NIR detection. Its planar epitaxial construction enables stable gain and low dark current (≤200 nA), while the PLCC-2 package integrates a built-in lens and collector-indicating notch for unambiguous orientation.
Designed for ambient operation from −40 °C to +100 °C, it delivers consistent Ica across temperature (±15% variation at 85 °C) and maintains <0.3 V VCE(sat) under 0.1 mA load-enabling direct interface with 3.3 V logic-level receivers without external amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 20 V - Maximum collector-emitter voltage before breakdown; supports rail-to-rail operation in 12 V industrial control inputs. |
| Ica (typ) | 0.6 mA at Ee = 1 mW/cm², λ = 940 nm - Sufficient drive strength for direct connection to Schmitt-trigger inputs or microcontroller GPIO with pull-up. |
| Rise/Fall time | 14 / 21 μs - Enables reliable detection of mechanical encoder edges up to ~15 kHz without signal distortion. |
| λ0.1 | 480–1050 nm - Covers visible red (630 nm), near-IR (850/940 nm), and edge of SWIR-compatible with VSML3710 IR emitters. |
| Angle of half sensitivity | ±60° - Provides wide field-of-view for misalignment-tolerant photo-interrupter designs in consumer encoders and position sensors. |
| RthJA | 400 K/W - Requires ≥4 mm × 4 mm copper pad for full 100 mW power dissipation at Tamb ≤ 75 °C. |
| MSL Level | Level 3 per J-STD-020 - 168-hour floor life at <30 °C / <60% RH; mandates bake prior to reflow if exposed beyond limit. |
Pinout & Package
PLCC-2 package (3.5 × 2.8 × 1.75 mm) with molded body, integrated lens, and notch-marked collector terminal. Surface-mount design optimized for automated placement and IR emitter pairing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (notch side) | Output current sink | Primary current path; connects to load resistor or MCU input; notch on package identifies this pin unambiguously. |
| Emiter | Reference node | Connected to ground or bias reference; forms common-emitter configuration enabling voltage-mode output via collector resistor. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q102 qualification | Validated for automotive cabin and chassis applications requiring reliability under thermal cycling, humidity, and vibration stress. |
| Fast response (14/21 μs) | Enables real-time detection of high-speed rotating targets in motor commutation and incremental encoder systems. |
| Matched with VSML3710 emitter | Optimized spectral alignment and mechanical footprint for compact, high-coupling-efficiency photo-interrupter modules. |
| Low dark current (≤200 nA) | Minimizes false triggering in low-light environments-critical for battery-powered position sensors and optical switches. |
| Lead (Pb)-free reflow compatible | Complies with JEDEC J-STD-020 profile (peak 260 °C); eliminates post-soldering cleaning and supports RoHS-compliant manufacturing. |
Applications
| Photo Interrupters | Miniature Switches |
|---|---|
Use Scenario: Optical beam break detection in printer paper-path sensors and vending machine product dispensers. IC Role / Device Role / Timing Role: Light-sensitive current switch converting presence/absence of IR beam into digital logic-level signal. Use Value: ±60° angular tolerance accommodates mechanical stack-up variation; 0.6 mA Ica ensures noise-immune switching into 10 kΩ pull-up loads. |
Use Scenario: Non-contact tactile feedback in medical device control panels and industrial HMI pushbuttons. IC Role / Device Role / Timing Role: Solid-state replacement for mechanical microswitches, triggered by actuator-mounted reflector. Use Value: AEC-Q102 qualification guarantees >1M cycle reliability; 14 μs rise time supports rapid button press/release detection. |
| Encoders | Position Sensors |
Use Scenario: Quadrature pulse generation in rotary encoders for servo motor feedback and CNC axis positioning. IC Role / Device Role / Timing Role: Edge-detecting photodetector paired with slotted disk; outputs synchronized square waves for direction and speed decoding. Use Value: 21 μs fall time preserves pulse fidelity at 15 kHz edge rates; spectral match to 940 nm emitters minimizes ambient light interference. |
Use Scenario: Linear position tracking in HVAC damper actuators and robotic joint limit detection. IC Role / Device Role / Timing Role: Ambient-light-resistant proximity detector using modulated IR illumination and synchronous demodulation. Use Value: 480–1050 nm bandwidth allows use with multiple emitter wavelengths; low 0.2 nA dark current enables high dynamic range in variable-light environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phototransistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TEFT4300 | TO-92 through-hole package; slower 35 μs rise time; no AEC-Q102 qualification. | Limited to non-automotive, low-speed counting; unsuitable for SMT production or high-reliability encoders. | Select when manual assembly or legacy board reuse is required and thermal performance is secondary. |
| OP550 | PLCC-2 package; 0.45 mA Ica; ±45° viewing angle; no MSL 3 rating. | Narrower field-of-view reduces misalignment margin; higher dark current (500 nA) limits low-light SNR. | Prefer where cost is critical and ambient light rejection is less demanding than angular tolerance. |
Compared with TEFT4300 and OP550, VEMT3705X02-GS08 provides superior speed, wider angular coverage, automotive-grade reliability, and tighter moisture handling-making it optimal for high-volume SMT encoder and position-sensing designs requiring long-term stability.
Availability
VEMT3705X02-GS08 is available at Aetrix Electronics and suitable for photo interrupters, miniature switches, and encoders requiring stable component supply, consistent parametric performance across production lots, and full traceability to Vishay's qualified wafer fab and assembly sites.
Supply support for VEMT3705X02-GS08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive devices with emphasis on reliability, precision, and application-specific optimization.
VEMT3705X02-GS08 belongs to Vishay's optoelectronics phototransistor family engineered for high-speed, high-stability optical sensing in automotive, industrial, and consumer motion-control systems.
FAQ
What is the maximum ambient temperature for continuous operation of the VEMT3705X02-GS08?
The VEMT3705X02-GS08 is rated for continuous operation from −40 °C to +100 °C ambient temperature. At 100 °C, derating applies: maximum power dissipation drops to ~25 mW due to RthJA = 400 K/W. For full 100 mW operation, ambient must remain ≤75 °C with a 4 mm × 4 mm copper pad.
Does the VEMT3705X02-GS08 require an external bias resistor?
Yes, the VEMT3705X02-GS08 requires an external collector load resistor to convert photocurrent into a measurable voltage. Typical values range from 4.7 kΩ to 10 kΩ for 3.3 V logic interfaces. No base bias is needed-it operates in common-emitter mode with emitter grounded.
Is the VEMT3705X02-GS08 compatible with infrared emitters operating at 850 nm?
Yes, the VEMT3705X02-GS08 has peak sensitivity at 950 nm and a broad spectral bandwidth from 480 nm to 1050 nm. At 850 nm, its relative sensitivity is ~85% of peak-fully sufficient for robust coupling with standard 850 nm IR emitters like VSML3710 or similar.
What does the "GS08" suffix indicate in VEMT3705X02-GS08?
The "GS08" suffix denotes tape-and-reel packaging per DIN IEC (CO) 564 blister tape, with 1500 units per reel and a minimum order quantity of 7500 pieces. It also specifies compliance with Vishay's moisture sensitivity level 3 (MSL 3) handling requirements and Pb-free reflow compatibility.
How is the collector terminal identified on the VEMT3705X02-GS08 PLCC-2 package?
The collector terminal of the VEMT3705X02-GS08 is identified by a physical notch on the package body. When viewed from the top with the notch oriented left, the left pin is the collector and the right pin is the emitter-ensuring correct orientation during automated placement and manual inspection.
VEMT3705X02-GS08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- 2-SMD, J-Lead
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Current - Collector (Ic) (Max):
- 50 mA
- Current - Dark (Id) (Max):
- 200 nA
- Wavelength:
- 950nm
- Viewing Angle:
- 120°
- Power - Max:
- 100 mW
- Mounting Type:
- Surface Mount
- Orientation:
- Top View
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- Automotive
- Qualification:
- AEC-Q102
VEMT3705X02-GS08 FAQ
1.How can I place an order for VEMT3705X02-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VEMT3705X02-GS08 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VEMT3705X02-GS08 reliable?
The price and inventory of VEMT3705X02-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VEMT3705X02-GS08 is usually 5 days.
3.What payment methods are accepted for VEMT3705X02-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VEMT3705X02-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VEMT3705X02-GS08?
VEMT3705X02-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VEMT3705X02-GS08 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VEMT3705X02-GS08?
For technical support, including VEMT3705X02-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VEMT3705X02-GS08 requirements.
6.How does Aetrix verify that VEMT3705X02-GS08 is sourced from the original manufacturer or authorized distributors?
All VEMT3705X02-GS08 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VEMT3705X02-GS08 meets industry standards.
7.What is the process for return or replacement of VEMT3705X02-GS08?
All VEMT3705X02-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VEMT3705X02-GS08, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VEMT3705X02-GS08 part is unused and in its original packaging.
Return procedure for VEMT3705X02-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VEMT3705X02-GS08 Tags
-
ALS-PT19-315C/L177/TR8
Everlight Electronics Co Ltd
-
PT19-21C/L41/TR8
Everlight Electronics Co Ltd
-
PT12-21C/TR8
Everlight Electronics Co Ltd
-
PT12-21B/TR8
Everlight Electronics Co Ltd
-
ALS-PT204-6C/L177
Everlight Electronics Co Ltd
.jpg)
-
APA3010P3BT-GX
Kingbright
-
PT26-51B/TR8(DGK)
Everlight Electronics Co Ltd
-
OP550A
TT Electronics/Optek Technology
-
OP505A
TT Electronics/Optek Technology
-
OP598A
TT Electronics/Optek Technology
-
PT42-21B/TR8
Everlight Electronics Co Ltd
-
QSB363ZR
onsemi
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
