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TLP521-1GBSMT&R
Isocom Components 2004 LTD
4PIN TRANSISTOR OUTPUT, SINGLE O
12830 Pcs New Original In Stock
Optoisolator Transistor Output 5300Vrms 1 Channel 4-SMD
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5.0 / 5.0
- (268 Ratings)
TLP521-1GBSMT&R
Product Overview
1913410
DiGi Electronics Part Number
TLP521-1GBSMT&R-DGManufacturer
Isocom Components 2004 LTD
TLP521-1GBSMT&R
Description
4PIN TRANSISTOR OUTPUT, SINGLE OInventory
12830 Pcs New Original In Stock
Optoisolator Transistor Output 5300Vrms 1 Channel 4-SMD
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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TLP521-1GBSMT&R Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
Tape & Reel (TR)
Series
TLP521-1
Product Status
Active
Number of Channels
1
Voltage - Isolation
5300Vrms
Current Transfer Ratio (Min)
100% @ 1mA
Current Transfer Ratio (Max)
600% @ 1mA
Turn On / Turn Off Time (Typ)
3µs, 3µs
Rise / Fall Time (Typ)
4µs, 3µs
Input Type
DC
Output Type
Transistor
Voltage - Output (Max)
55V
Current - Output / Channel
50mA
Voltage - Forward (Vf) (Typ)
1.15V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
400mV
Operating Temperature
-30°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
4-SMD (0.300", 7.62mm)
Supplier Device Package
4-SMD
Datasheet & Documents
HTML Datasheet
TLP521-1GBSMT&R-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
56-TLP521-1GBSMT&RTR
58-TLP521-1GBSMT&RCT
56-TLP521-1GBSMT&RTR-DG
58-TLP521-1GBSMT&RDKR
58-TLP521-1GBSMT&RTR
Standard Package
1,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
アフターサービスの対応も迅速で、問題解決までの時間が短いのが助かります。
Dec 02, 2025
I am impressed by the unbeatable prices at DiGi Electronics without sacrificing quality.
Dec 02, 2025
My order arrived in pristine condition, thanks to their highly effective packaging materials.
Dec 02, 2025
Every experience with DiGi Electronics reaffirms their professionalism and reliability.
Dec 02, 2025
Secure packaging has made me more confident when purchasing from DiGi Electronics.
Dec 02, 2025
DiGi Electronics provides reliable and friendly customer service post-purchase.
Dec 02, 2025
The shipping process was smooth, and the staff was quick to resolve my concerns.
Dec 02, 2025
Their pricing strategy is fantastic, and their website makes shopping simple.
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Frequently Asked Questions (FAQ)
Can the TLP521-1GBSMT&R safely replace an older TLP521-1XGBSMT&R in a 24V industrial control circuit without redesigning the PCB layout?
Yes, the TLP521-1GBSMT&R is a direct drop-in replacement for the TLP521-1XGBSMT&R, as both share identical pinouts, package dimensions (4-SMD, 7.62mm), and electrical characteristics including 5300Vrms isolation and 55V output rating. However, verify that your input current drive remains within the 1–50mA forward current range, especially if the original design operated near the upper limit—minor CTR degradation over temperature or lifetime could affect signal integrity in marginal designs. No PCB changes are needed, but consider adding a small base resistor (e.g., 10kΩ) on the output side if driving capacitive loads to prevent false triggering due to leakage currents over time.
What are the key reliability risks when using the TLP521-1GBSMT&R in a high-vibration automotive application near the engine compartment?
The TLP521-1GBSMT&R is rated for -30°C to 100°C operation and has an MSL 1 rating, meaning it’s robust against moisture, but mechanical stress from sustained high vibration can fatigue the internal bond wires or solder joints over time. Unlike hermetically sealed optocouplers, this plastic-packaged device lacks enhanced mechanical damping. To mitigate risk, ensure adequate strain relief on PCB traces, use conformal coating to reduce microcracking, and avoid mounting near resonant frequencies. For mission-critical automotive systems, consider more ruggedized alternatives like the Avago ACPL-217 or Vishay VO615A, which offer similar specs with better vibration tolerance.
How does the current transfer ratio (CTR) degradation of the TLP521-1GBSMT&R affect long-term performance in a 4–20mA loop interface, and what design margins should I apply?
The TLP521-1GBSMT&R has a minimum CTR of 100% at 1mA, but CTR typically degrades by 30–50% over 10 years due to LED aging, especially at elevated temperatures. In a 4–20mA loop where consistent signal isolation is critical, this drift can cause output saturation or loss of linearity. Design with at least 2:1 CTR margin—for example, drive the input at 2mA instead of 1mA to ensure the output transistor remains in active region even after degradation. Also, implement periodic calibration or use feedback-based circuitry to compensate for drift, particularly if operating near the 100°C upper limit.
Is it safe to parallel two TLP521-1GBSMT&R channels to increase output current beyond 50mA for driving a relay coil?
No, paralleling multiple TLP521-1GBSMT&R units is not recommended due to inherent mismatch in forward voltage (Vf) and CTR between devices, which leads to uneven current sharing and potential thermal runaway. Even with matched batch codes, the ±15% Vf tolerance can cause one unit to carry significantly more load. Instead, use a single TLP521-1GBSMT&R to drive a small NPN or MOSFET buffer stage (e.g., 2N3904 or 2N7002) to boost current capability. This approach isolates the optocoupler from inductive kickback and maintains reliability while staying within the device’s 50mA per-channel limit.
Can the TLP521-1GBSMT&R be used to isolate a 10kHz PWM signal from a microcontroller to a motor driver without signal distortion?
Yes, but with careful attention to timing margins. The TLP521-1GBSMT&R has typical turn-on/off times of 3µs and rise/fall times of 4µs/3µs, resulting in a propagation delay that may cause noticeable duty cycle distortion at 10kHz (100µs period). For precise PWM control, calculate worst-case timing skew—up to ~10µs total delay—and compensate in firmware or reduce the PWM frequency to ≤5kHz. Additionally, ensure the output transistor operates in saturation with sufficient base drive; use a pull-down resistor (1–10kΩ) on the output to speed up turn-off and minimize shoot-through in H-bridge configurations. For higher-speed applications, consider faster alternatives like the Toshiba TLP2361 (1Mbps digital output).
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
TLP521-1GBSMT&R CAD Models
Isocom Components 2004 LTD TLP521-1GBSMT&R PCB symbols & footprints
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