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Vishay Semiconductor Opto Division VEMT3700-GS08
- Part No.:
- VEMT3700-GS08
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Phototransistors
- Package:
- 2-PLCC
- Datasheet:
-
VEMT3700-GS08.pdf
- Description:
- SENSOR PHOTO 830NM TOP VIEW PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:10,559
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Product details
Overview
VEMT3700-GS08 from Vishay Semiconductors is a high-speed silicon NPN epitaxial planar phototransistor in a PLCC-2 surface-mount package, rated for 70 VCEO, 0.5 mA collector light current at 1 mW/cm² irradiance (950 nm), and ±60° half-sensitivity angle-designed for compact photo interrupters and position sensing in industrial encoders.
For engineers reviewing the VEMT3700-GS08 datasheet, VEMT3700-GS08 pinout, VEMT3700-GS08 application, or VEMT3700-GS08 equivalent, key selection criteria include radiant sensitivity range (450–1080 nm), fast 2 µs response with 100 Ω load, thermal resistance (400 K/W), MSL 3 floor life (168 h), and compatibility with VSML3710 IR emitters.
Technical Context
The VEMT3700-GS08 operates as a single-element NPN phototransistor with no base connection-photocurrent gain is inherent to its epitaxial planar structure. Its spectral response peaks at 850 nm and extends from visible (450 nm) to near-infrared (1080 nm), enabling use with common GaAlAs emitters.
It delivers 0.25–0.5 mA collector light current under standardized 1 mW/cm² irradiance at 950 nm and VCE = 5 V, with VCE(sat) ≤ 0.3 V at IC = 0.1 mA. Rise/fall times drop to 2 µs with 100 Ω load, supporting >180 kHz cutoff frequency in optimized circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 70 V - maximum allowable collector-emitter voltage before breakdown |
| Ica | 0.5 mA typical - photocurrent output under 1 mW/cm² @ 950 nm, defines signal strength in detection circuits |
| ϕ | ±60° - angular field-of-view where sensitivity drops to 50%, critical for alignment tolerance in slot sensors |
| λ0.1 | 450–1080 nm - full spectral bandwidth enabling compatibility with visible LEDs and NIR emitters |
| tr/tf | 2 µs @ RL = 100 Ω - enables high-speed counting up to ~180 kHz without pulse distortion |
| RthJA | 400 K/W - thermal resistance when soldered on 4 mm × 4 mm PCB pad, informs derating above 25°C ambient |
| VCE(sat) | 0.3 V max - low saturation voltage ensures clean logic-level output into standard CMOS/TTL inputs |
Pinout & Package
Package: PLCC-2 (Plastic Leaded Chip Carrier, 2-terminal), dimensions 3.5 × 2.8 × 1.75 mm, notch-marked to indicate collector terminal. Surface-mount compatible with Pb-free reflow per J-STD-020 (MSL 3, floor life 168 h).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (notch side) | Anode of internal photodiode / emitter of transistor | Primary output node; connects to pull-up resistor or logic input; polarity must match emitter biasing |
| Emitter | Transistor emitter / cathode reference | Connected to ground or low-side switch node; establishes common reference for photocurrent flow |
Key Features
| Feature | Design Value |
|---|---|
| High radiant sensitivity | 0.5 mA output per 1 mW/cm² irradiance enables reliable detection with low-power emitters |
| Fast response time | 2 µs rise/fall with 100 Ω load supports real-time position feedback in motor encoders |
| Wide spectral bandwidth | 450–1080 nm coverage allows use with red LEDs, IR emitters, and ambient-light-tolerant designs |
| Angle of half sensitivity | ±60° field-of-view simplifies mechanical alignment in compact photo-interrupter housings |
| PLCC-2 surface-mount package | Miniature 3.5 × 2.8 mm footprint saves board space vs. through-hole phototransistors |
Applications
| Photo Interrupters | Rotary Encoders |
|---|---|
Use Scenario: Detecting object presence or edge transitions in automated vending machines and paper-path sensors. IC Role / Device Role / Timing Role: Phototransistor element in reflective or transmissive optical switch, converting beam interruption into digital logic-level signal. Use Value: ±60° angular tolerance and 0.5 mA output ensure robust switching even with minor misalignment or vibration. | Use Scenario: Reading incremental position from slotted encoder disks in servo motors and CNC axes. IC Role / Device Role / Timing Role: High-speed light-current converter synchronized to rotating mask patterns, feeding quadrature decoder ICs. Use Value: 2 µs response and 180 kHz bandwidth support >10 kRPM rotation speeds with sub-degree resolution. |
| Position Sensors | Light Sensors |
Use Scenario: End-of-travel detection in linear actuators and robotic joint limit switches. IC Role / Device Role / Timing Role: Transmissive photodetector in compact OEM sensor modules, interfacing directly to microcontroller GPIO. Use Value: Low VCE(sat) (≤0.3 V) eliminates need for external level-shifting, reducing BOM count. | Use Scenario: Ambient light monitoring in smart displays and adaptive backlight control systems. IC Role / Device Role / Timing Role: Spectrally broad detector (450–1080 nm) capturing visible + NIR content for accurate luminance estimation. Use Value: 850 nm peak sensitivity aligns with common IR illumination sources, enabling dual-mode (visible + IR) sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phototransistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VEMT3705 | Direct replacement per Vishay EOL notice; identical PLCC-2 package, same 70 VCEO, 0.5 mA Ica, ±60° ϕ, but updated process for improved consistency and extended lifecycle beyond Feb-2025 | No functional change; validated for all existing VEMT3700 designs including photo interrupters and encoders | Select VEMT3705 for new designs or inventory replenishment to ensure long-term supply continuity |
| TEMT6200FX | Different package (SMD 0805), lower Ica (0.35 mA), narrower spectral range (750–1050 nm), higher dark current (50 nA typ) | Suitable for cost-sensitive consumer light sensing but not recommended for high-speed or precision position sensing | Consider only if board space is constrained to 0805 and speed requirements <100 kHz |
Compared with VEMT3700-GS08, VEMT3705 offers identical electrical and mechanical specs with assured availability past February 2025, while TEMT6200FX trades speed and sensitivity for smaller size and lower cost-making it viable only in non-critical ambient light detection.
Availability
VEMT3700-GS08 is available at Aetrix Electronics and suitable for photo interrupters, rotary encoders, position sensors, and ambient light sensing requiring stable component supply during transition to VEMT3705.
Supply support for VEMT3700-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 leadership in optoelectronics reliability and high-volume SMT production.
The VEMT3700-GS08 belongs to Vishay's high-speed phototransistor product line, engineered for precision optical detection in industrial automation, motion control, and compact sensing modules where speed, spectral breadth, and surface-mount reliability are essential.
FAQ
What is the maximum operating temperature for the VEMT3700-GS08?
The VEMT3700-GS08 has an operating temperature range of -40 °C to +100 °C, with junction temperature limited to 100 °C. At elevated ambient temperatures, power dissipation must be derated using the specified thermal resistance of 400 K/W when mounted on a 4 mm × 4 mm PCB pad. This ensures safe operation in industrial motor control and automotive under-hood environments where the VEMT3700-GS08 is commonly deployed.
Is the VEMT3700-GS08 RoHS-compliant and lead-free?
Yes, the VEMT3700-GS08 is lead (Pb)-free and compliant with RoHS Directive 2011/65/EU. It supports Pb-free reflow soldering per J-STD-020, with peak temperature up to 260 °C. The device is categorized under Vishay's material compliance program, and full substance declarations are available upon request. This makes the VEMT3700-GS08 suitable for global electronics manufacturing where environmental compliance is mandatory.
What is the spectral response range of the VEMT3700-GS08, and why does it matter?
The VEMT3700-GS08 has a spectral bandwidth of 450–1080 nm, covering visible blue light through near-infrared. Its peak sensitivity is at 850 nm, aligning with common GaAlAs IR emitters like the VSML3710. This broad range allows flexibility in emitter choice and improves immunity to ambient light interference when paired with optical filters-critical for reliable operation of the VEMT3700-GS08 in uncontrolled lighting conditions.
How does the ±60° angle of half sensitivity affect mechanical design?
The ±60° angle of half sensitivity means the VEMT3700-GS08 maintains ≥50% of peak response within a 120° total cone. This wide angular acceptance relaxes mechanical tolerances in photo-interrupter assemblies, allowing ±0.5 mm misalignment between emitter and detector without signal loss. It reduces assembly cost and improves yield in high-volume production of devices using the VEMT3700-GS08.
What is the floor life and moisture sensitivity level (MSL) for the VEMT3700-GS08?
The VEMT3700-GS08 is rated MSL 3 per J-STD-020, with a floor life of 168 hours (7 days) at ≤30 °C and ≤60% RH after opening the moisture barrier bag. If exposed beyond this window, baking per J-STD-020 is required prior to reflow. This specification directly impacts handling protocols in SMT lines using the VEMT3700-GS08 and must be enforced to prevent popcorning or delamination.
VEMT3700-GS08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- 2-PLCC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Collector Emitter Breakdown (Max):
- -
- Current - Collector (Ic) (Max):
- 500 µA
- Current - Dark (Id) (Max):
- -
- Wavelength:
- 830nm
- Viewing Angle:
- 120°
- Power - Max:
- -
- Mounting Type:
- Surface Mount
- Orientation:
- Top View
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
VEMT3700-GS08 FAQ
1.How can I place an order for VEMT3700-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VEMT3700-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 VEMT3700-GS08 reliable?
The price and inventory of VEMT3700-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VEMT3700-GS08 is usually 5 days.
3.What payment methods are accepted for VEMT3700-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VEMT3700-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VEMT3700-GS08?
VEMT3700-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VEMT3700-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 VEMT3700-GS08?
For technical support, including VEMT3700-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VEMT3700-GS08 requirements.
6.How does Aetrix verify that VEMT3700-GS08 is sourced from the original manufacturer or authorized distributors?
All VEMT3700-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 VEMT3700-GS08 meets industry standards.
7.What is the process for return or replacement of VEMT3700-GS08?
All VEMT3700-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VEMT3700-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 VEMT3700-GS08 part is unused and in its original packaging.
Return procedure for VEMT3700-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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