TSHA4401-AS12Z - 875nm GaAlAs IR Emitter, 3mm T-1 | Vishay
N.º de pieza: TSHA4401-AS12Z ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.18 | $11,80 |
| 100 | $0.94 | $94,00 |
| 500 | $0.78 | $390,00 |
| 1.000 | $0.65 | $650,00 |
| 5.000 | $0.52 | $2.600,00 |
TSHA4401-AS12Z Descripción general
An infrared emitter (IRED) is a semiconductor optoelectronic device that converts electrical current into near-infrared light, typically used in pairs with photodetectors or phototransistors to form an optical link. Within the optoelectronics hierarchy, an IRED falls under LEDs and Optoelectronics, with hypernyms IR LED, infrared emitter, GaAlAs IRED, and narrow-spectrum photo source. IR emitters are foundational building blocks for non-contact object detection, position sensing, data communication over light, and barrier/through-beam switches. The 875 nm wavelength is particularly chosen for its low attenuation through standard soda-lime glass, enabling applications where the emitter and detector are placed behind glass panes.
Key features of the TSHA4401-AS12Z include a typical radiant power efficiency that is markedly higher than conventional GaAs IR emitters of its generation, a hermetically robust molded plastic package with viewing angle of ±20°, and fast switching speed suitable for pulsed modulation at tens of kHz. The 1.5 V typical Vf at 100 mA allows the device to be driven directly from low-voltage rails (3.3 V or 5 V) through a simple series resistor. Operating temperature spans -40 °C to +85 °C, covering industrial and consumer environments.
Typical applications for this part include IR data transmission (IrDA-style links and remote-control carrier modulation), reflective and through-beam object sensors, industrial counters and tachometers, photo-interrupter modules, and glass-pane-barrier intrusion detectors. The narrow ±20° beam suits point-to-point links where off-axis rejection of ambient light is critical.
When designing with this emitter, drive the LED with a constant-current source or a properly sized series resistor. Estimate the resistor value as R = (VCC - Vf) / If; for VCC = 5 V, Vf = 1.5 V, and If = 100 mA, R ≈ 35 Ω. A 100 nF bypass capacitor across the supply improves noise immunity. For pulsed operation, respect the peak forward current and duty cycle limits stated in the manufacturer datasheet.
Alternativas directas para TSHA4401-AS12Z — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TSHA4401-AS12Z (mismo factor de forma y huella) — difiere en Mounting Type, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TSHA4400-AS12Z
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TSHA4401
✅ Sustitución directa✓ En stock
$0.72 / unidad
Ver hoja de datos →TSHA4401-AS12Z-TR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TSHA4401-AS12
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TSHA4401-AS12Z Especificaciones
| Peak Wavelength | 875 nm |
| Forward Voltage (Vf) | 1.5 V typical at 100 mA |
| DC Forward Current (If) | 100 mA maximum |
| Radiant Intensity (Ie) | 16 mW/sr typical at 100 mA |
| Half-Power Viewing Angle | ±20° (40° total) |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C |
| Encapsulado / Carcasa | Radial, 3 mm (T-1) tinted diffused |
| Lead Form / Packaging | AS12Z - formed leads, tape & reel |
| Tipo de montaje | Through-Hole |
| Estado RoHS | Compliant (per part suffix -e2) |
Configuración de pines de TSHA4401-AS12Z
| Pin 1 | Anode (+) — Anode lead; longer of the two radial leads |
| Pin 2 | Cathode (-) — Cathode lead; identified by the flat on the T-1 package flange and the shorter lead |
Aplicaciones típicas
TSHA4401-AS12Z es adecuado para 6 aplicacións: IR Data Transmission (IrDA-style links), Through-Beam Object Detection, Reflective Optical Switch / Proximity Sensor, Glass-Pane Barrier Intrusion Detector, Industrial Counter / Tachometer, Remote Control Carrier Modulation.
IR Data Transmission (IrDA-style links)
The TSHA4401-AS12Z suits short-range IR data links thanks to its 16 mW/sr typical radiant intensity and fast GaAlAs switching speed. Driving the emitter from a 5 V rail through a 35 Ω series resistor at 100 mA produces a strong optical carrier that a matched phototransistor can demodulate at tens of kHz. Unlike LED indicators, the 875 nm wavelength passes through standard glass with low attenuation, allowing the emitter to sit behind a window. This makes the part ideal for handheld IR dongles, industrial remote controls, and isolated serial data bridges where electrical isolation is achieved through an air gap rather than opto-isolator packages.
Recomendado
Through-Beam Object Detection
Through-beam photo-interrupter designs benefit from the TSHA4401-AS12Z's narrow ±20° half-power beam, which provides strong off-axis ambient-light rejection. Mounted opposite a matched phototransistor across a conveyor, vending-machine chute, or 3D-printer filament sensor, the emitter reliably saturates the detector when the beam is unobstructed. The 100 mA DC rating supports long-throw links of several meters when both optics are aimed carefully. Pulse-width modulation at 1-10 kHz further improves immunity to sunlight and to 50/60 Hz mains flicker. This is the classic architecture for industrial counters and assembly-line presence detectors.
Recomendado
Reflective Optical Switch / Proximity Sensor
Reflective proximity sensors place the TSHA4401-AS12Z and a detector side-by-side, both aimed at the same target. The 16 mW/sr typical radiant intensity at 100 mA provides enough return signal from a white card at 5-10 mm distance to switch a comparator reliably. Driving the emitter with a 5-20 kHz pulsed current and AC-coupling the detector filters out ambient light. Compared to laser-based time-of-flight sensors, this IR-LED approach is dramatically cheaper, lower in power, and immune to eye-safety regulations, making it well suited to consumer robotics, paper sensors in printers, and automotive seat-occupancy detection.
Recomendado
Glass-Pane Barrier Intrusion Detector
The 875 nm emission peak of the TSHA4401-AS12Z is specifically engineered for low attenuation through standard soda-lime glass, making it the wavelength of choice for glass-pane barrier detectors used in alarm systems. The emitter sits inside the protected volume, aimed at a wall-mounted retroreflector, and an interruption of the beam triggers the alarm. The ±20° beam angle aligns well with typical retroreflective tape. Compared to 940 nm alternatives, the 875 nm wavelength loses less intensity through 3-6 mm glass, extending usable barrier distance and reducing false-trigger risk from partial obscurations.
Recomendado
Industrial Counter / Tachometer
High-speed rotational counting and tachometry use the TSHA4401-AS12Z's fast switching characteristics to generate short, well-defined optical pulses that a phototransistor detects each time a reflector or slot passes by. Pulse-widths down to a few microseconds are achievable, supporting rotation speeds well into the tens of thousands of RPM. The 100 mA DC forward current rating and the option to overdrive briefly into pulsed peak current deliver plenty of optical margin for outdoor sunlight immunity. Typical uses include flow-meter impellers, conveyor-belt object counting, and encoder wheels.
Recomendado
Remote Control Carrier Modulation
At 875 nm, the TSHA4401-AS12Z is close enough to the 940 nm peak of typical TV remote receivers that, with the addition of a 36-40 kHz carrier modulation, it can drive legacy IR receivers such as the TSOP1738. The 16 mW/sr radiant intensity and ±20° beam give reliable 5-10 meter control range. Although 940 nm emitters such as the TSAL6100 are more common for this purpose, the TSHA4401-AS12Z remains a viable drop-in when a glass-pane barrier needs to share the same optical hardware, or when the supply design prefers GaAlAs efficiency over 940 nm GaAs economics.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TSHA4401-AS12Z — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TSHA4400-AS12Z | TSHA4401 | TSHA4401-AS12Z-TR |
|---|---|---|---|---|
| Brand | Vishay | Vishay | Vishay | Vishay |
| Package | 3 mm (T-1) Radial | 3 mm (T-1) Radial - same | 3 mm (T-1) Radial - same | 3 mm (T-1) Radial - same |
| Peak Wavelength | 875 nm | 875 nm | 875 nm | 875 nm |
| Forward Voltage (Vf) at 100 mA | 1.5 V typical | 1.5 V typical | 1.5 V typical | 1.5 V typical |
| Maximum DC Forward Current | 100 mA | 100 mA | 100 mA | 100 mA |
| Radiant Intensity (Ie) at 100 mA | 16 mW/sr typical | Lower than TSHA4401 | 16 mW/sr typical | 16 mW/sr typical |
| Half-Power Viewing Angle | ±20° | ±20° | ±20° | ±20° |
| Lead Form / Packaging Code | AS12Z (Tape & Reel) | AS12Z (Tape & Reel) | Bulk | Tape & Reel |
| RoHS Compliance | Yes (per -e2 suffix) | Yes | Yes | Yes |
Diferenciadores clave
- Higher radiant intensity than TSHA4400 at same drive current (frente a TSHA4400-AS12Z)
- Narrow ±20° beam suited to long-distance through-beam designs (frente a TSAL6100 (Vishay))
- 875 nm wavelength passes through glass with low attenuation (frente a Generic 940 nm IR emitter)
Notas de diseño
Estimated: At VCC = 5 V, Vf = 1.5 V, and If = 100 mA, the series resistor is (5 - 1.5) / 0.1 = 35 Ω. Choose a standard 33 Ω or 36 Ω 1% resistor rated at 1/4 W or higher; at 100 mA the resistor dissipates (VCC - Vf) × If = 0.35 W, so a 1/2 W part provides comfortable margin. A 100 nF ceramic bypass capacitor across the supply improves noise immunity for pulsed-modulation drive schemes.
The TSHA4401-AS12Z does not have a heatsink tab, but at 100 mA DC forward current the device dissipates roughly Vf × If = 1.5 × 0.1 = 0.15 W, well within the package rating. Duty-cycle derating applies for pulsed operation: respect the absolute peak current limit in the manufacturer datasheet. Mount the emitter leads with at least 5 mm of free bend length to keep thermal stress off the glass-to-metal seal during soldering.
Through-hole T-1 emitters should be mounted on a PCB with a hole pitch of 2.54 mm (0.1 in). Keep the emitter body at least 3 mm above the PCB to allow optical axis alignment. For reflective proximity sensors, maintain a black optical barrier between the emitter and adjacent detector to prevent direct optical crosstalk. Apply 0.8-1.0 mm solder fillets; hand-soldering at 350 °C for less than 2 seconds per lead is acceptable.
Do not drive the emitter from a DC source without current limiting; the LED's exponential I-V curve means a small Vf tolerance window can produce destructive currents. Avoid operating at the absolute maximum DC forward current continuously; derate 20-30% for long life. Match the detector spectral response to the 875 nm peak, not to the more common 940 nm peak used in TV remotes.
Información de cumplimiento
RoHS compliance per part suffix -e2 noted on distributor listings. Reach compliance assumed from EU distribution. AEC-Q100 not applicable - this is a through-hole optoelectronic component, not qualified for automotive under that standard. Halogen-free status not stated in distributor snippets.
