Specifications
| Type | Description |
|---|---|
| Part Number | XL640A-G |
| Manufacturer | XINGLIGHT |
| Product Type | SMD LED |
| Category | LED |
| Package / Case | DIP4, SMD4; package outline dimensions shown in mm but numeric dimensions not provided in text |
| Relay Contact Form | Normally open, single pole single throw |
| Control Voltage Capability | 400 VAC or DC |
| Isolation Voltage | 5000 Vrms; between input and output, AC for 1 minute, 40% to 60% RH |
| Operating Temperature | -40 to +85 °C |
| Storage Temperature Range | -40 to +100 °C |
| Input Forward Current | 50 mA; maximum rating, Ta=25°C unless otherwise specified |
| Input Peak Forward Current | 1 A; pulse width <=1 us, duty ratio 0.001 |
| Input Reverse Voltage | 5 V; maximum rating, Ta=25°C unless otherwise specified |
| Input Power Dissipation | 75 mW; maximum rating, Ta=25°C unless otherwise specified |
| Output Load Voltage | 400 V peak AC; maximum rating, Ta=25°C unless otherwise specified |
| Continuous Load Current | 0.12 A peak AC; maximum rating, Ta=25°C unless otherwise specified |
| Peak Load Current | 0.3 A; 100 ms, 1 shot, VL=DC |
| Output Power Dissipation | 500 mW; maximum rating, Ta=25°C unless otherwise specified |
| LED Turn-On Current | Typ 0.6 mA, Max 3 mA; IL=0.12 A, Ta=25°C |
| LED Turn-Off Current | Min 0.1 mA, Typ 0.5 mA; IL=0.12 A, Ta=25°C |
| LED Dropout Voltage | Min 1 V, Typ 1.3 V, Max 1.5 V; IF=5 mA, Ta=25°C |
| On Resistance | Typ 13 ohm, Max 20 ohm; IF=5 mA, IL=0.12 A, within 1 s on time, Ta=25°C |
| Off-State Leakage Current | Max 1000 nA; IF=0 mA, VL=400 V, Ta=25°C |
| Turn-On Time | Min 10 us, Typ 110 us, Max 2000 us; IF=5 mA, IL=0.12 A, Ta=25°C |
| Turn-Off Time | Min 10 us, Typ 220 us, Max 1000 us; IF=5 mA, IL=0.12 A, Ta=25°C |
| I/O Capacitance | Typ 0.8 pF, Max 1.5 pF; f=1 MHz, VB=0, Ta=25°C |
| Initial I/O Isolation Resistance | Min 1000 Mohm; 500 VDC, Ta=25°C |
| Recommended LED Forward Current | 5 to 10 mA; application recommendation |
| Molding Compound Flammability | UL 94V-0 |
| Terminals | Matte tin-plated leads; solderability per MIL-STD-202, Method 208 |
| DIP4 Shipping Quantity | 100 pcs/tube; ordering information for XL640A |
| SMD4 Shipping Quantity | 2000 pcs/tape and reel; ordering information for XL640AA |
| Marking Code | XL640A; applies to XL640A DIP4 and XL640AA SMD4 |
| Reflow Preheat Temperature | Min 150 °C, Max 200 °C |
| Reflow Preheat Time | Min 60 s, Max 120 s |
| Reflow Ramp-Up Rate | 3 °C/s; TL to TP |
| Reflow Liquidus Temperature | 217 °C |
| Reflow Time Above Liquidus | Min 60 s, Max 150 s; above TL |
| Reflow Peak Temperature | 260 °C |
| Reflow Time Near Peak | 30 s; Tc between TP-5 and TP |
| Reflow Ramp-Down Rate | 6 °C/s; TP to TL |
| Reflow Cycles | No more than 3 times |
| Wave Soldering Average Ramp-Up Rate | ~200 °C/s |
| Wave Soldering Heating Rate During Preheat | Typical 1 to 2 °C/s, maximum 4 °C/s |
| Wave Soldering Final Preheat Temperature | ~130 °C; Ts |
| Wave Soldering Preheat Time | >60 s; 25 °C to Ts |
| Wave Soldering Peak Temperature | 260 °C; Tp |
| Wave Soldering Time Within Peak Temperature | 10 s; tp |
| Wave Soldering Ramp-Down Rate | 5 °C/s maximum |
| Hand Soldering Iron Temperature | 360 °C +5 °C within 3 s; only for product rework or sample testing |
| Datasheet Status | request_only |
Product Overview
XL640A-G is documented by XINGLIGHT as a normally-open photo relay in the LED category. Its relay contact form is normally open, single pole single throw, and the feature description lists 400 VAC or DC control voltage capability. The device is associated with DIP4 and SMD4 package options; the package outline dimensions are shown in millimeters, although numeric dimensions are not included in the extracted text.
Input-side maximum ratings include 50 mA forward current, 1 A peak forward current under the stated pulse condition, 5 V reverse voltage, and 75 mW input power dissipation. Output-side ratings include 400 V peak AC load voltage, 0.12 A peak AC continuous load current, 0.3 A peak load current for a 100 ms one-shot DC load condition, and 500 mW output power dissipation.
The datasheet also specifies assembly and handling parameters, including UL 94V-0 molding compound flammability, matte tin-plated leads with solderability per MIL-STD-202 Method 208, and defined reflow, wave soldering, and hand soldering profiles. These facts support use in isolated switching applications requiring a normally-open photo relay contact and the stated voltage, current, isolation, and thermal limits.
Key Features
- Normally-open SPST photo relay contact form
- 400 VAC or DC control voltage capability
- 5000 Vrms input-to-output isolation rating
- -40 to +85 °C operating temperature range
- 400 V peak AC output load voltage
- 0.12 A peak AC continuous load current
- Typ 13 ohm, max 20 ohm on resistance
- Max 1000 nA off-state leakage current
- 5 to 10 mA recommended LED forward current
- UL 94V-0 molding compound flammability
Typical Applications
- Isolated AC or DC switching
- Normally-open relay output circuits
- Low-current load control
- High-isolation signal switching
- DIP4 through-hole assemblies
- SMD4 tape-and-reel assemblies
- Controlled reflow soldering processes
- Wave soldering assembly lines
Procurement Notes
When requesting a quote for XL640A-G, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For LED and optoelectronic sourcing, brightness bin, wavelength or color temperature bin, forward voltage range, viewing angle, moisture sensitivity level and soldering process limits may affect final selection, availability and lead time.
FAQ
What contact form does XL640A-G provide?
The extracted datasheet facts identify XL640A-G as a normally-open photo relay with a normally open, single pole single throw contact form. This contact description comes from the feature description.
What isolation voltage is specified for XL640A-G?
The isolation voltage is specified as 5000 Vrms between input and output. The stated condition is AC for 1 minute at 40% to 60% relative humidity.
What package information is available for XL640A-G?
The extracted package information lists DIP4 and SMD4. Package outline dimensions are shown in millimeters in the datasheet, but numeric dimensions were not provided in the extracted text.
What LED drive current is recommended?
The application recommendation lists an LED forward current range of 5 to 10 mA. Related electrical conditions include a dropout voltage of 1.0 V minimum, 1.3 V typical, and 1.5 V maximum at IF=5 mA and Ta=25°C.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 2, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.