1.5KE16ARL4G - 1500W 16V Unidirectional TVS | onsemi
N.º de pieza: 1.5KE16ARL4G ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.85 | $0,85 |
| 10 | $0.74 | $7,40 |
| 100 | $0.62 | $62,00 |
| 500 | $0.51 | $255,00 |
| 1.000 | $0.42 | $420,00 |
1.5KE16ARL4G Descripción general
A Transient Voltage Suppressor (TVS) is a specialized clamping diode that operates in avalanche breakdown when the line experiences a fast over-voltage event such as an ESD pulse, inductive load kickback, or lightning-induced surge. TVS diodes sit at the front of the protection topology, upstream of bulk protection (fuses, PTCs) and downstream of the exposed connector; their job is to divert surge current away from sensitive ICs within microseconds. The 1.5KE family is the workhorse 1500 W industrial/automotive grade series defined by JEDEC register DO-201AA axial outlines.
Key features of the 1.5KE16ARL4G include 1500 W peak pulse power (10/1000 µs waveform), 67 A peak pulse current (Ipp), unidirectional polarity, a typical clamping voltage of 22.5 V at Ipp, low Zener impedance in breakdown, fast response time (sub-nanosecond), and a maximum clamping factor that ensures the protected downstream rail stays within its absolute-maximum rating. The Surmetic axial package is a through-hole DO-201AA body with robust leads suitable for wave-soldering and high-vibration environments.
Technically, the 1.5KE16ARL4G uses a large-junction silicon die designed for non-repetitive high-energy avalanche. Peak pulse power is specified for a 10/1000 µs exponential waveform per the industry-standard TVS test method; steady-state power dissipation is rated at 5 W (with appropriate lead length derating). Reverse leakage at standoff is in the µA range, allowing the part to remain in-circuit without measurable quiescent loss.
Typical applications include DC power-line protection on 12 V industrial bus rails, automotive 12 V load-dump protection, secondary protection behind a primary TVS or PTC on long signal lines, protection of telecom line drivers, and suppression of inductive kickback from relays, solenoids, and motor windings. It is also widely used in switch-mode power supply (SMPS) output rectification and snubbing.
When designing with this part, derate peak pulse power for shorter pulses (the 8/20 µs waveform allows higher Ipp) and ensure lead length matches the datasheet's thermal derating curve. Avoid continuous operation in breakdown - this part is intended for transient clamping only, not as a voltage regulator.
Alternativas directas para 1.5KE16ARL4G — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
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1.5KE16A
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1.5KE16ARL4G
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$0.42 / unidad
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1.5KE16A
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1.5KE16A
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1.5KE16A
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1.5KE16ARL4G Especificaciones
| Peak Pulse Power (10/1000 µs) | 1500 W |
| Reverse Standoff Voltage (Vrwm) | 13.6 V |
| Breakdown Voltage (Vbr) Min | 15.2 V |
| Breakdown Voltage (Vbr) Max | 16.8 V |
| Clamping Voltage (Vc) at Ipp | 22.5 V |
| Peak Pulse Current (Ipp) 10/1000 µs | 67 A |
| Polarity | Unidirectional |
| Encapsulado | DO-201AA (Surmetic axial, through-hole) |
| Tipo de montaje | Through Hole |
| Maximum Clamping Voltage | 22.5 V |
| Temperatura de funcionamiento | -65 C to +175 C |
| Steady-State Power Dissipation | 5 W (with lead-length derating) |
| Series | 1.5KE / Mosorb |
| Estado RoHS | Compliant |
| Lead Configuration | Axial, two-lead (cathode marked with band) |
Configuración de pines de 1.5KE16ARL4G
| Pin 1 | Anode — Anode lead (unmarked) |
| Pin 2 | Cathode — Cathode lead (marked with color band on body) |
Peak Pulse Power vs Pulse Duration
Aplicaciones típicas
1.5KE16ARL4G es adecuado para 6 aplicacións: 12 V Industrial DC Bus Surge Protection, Automotive 12 V Load-Dump Suppression, Relay and Solenoid Inductive Kickback Clamping, Telecom Line Driver Protection, SMPS Output Rectifier Snubbing, Test and Measurement Equipment Input Protection.
12 V Industrial DC Bus Surge Protection
The 1.5KE16ARL4G protects 12 V industrial DC rails from inductive switching transients and switching regulator noise spikes. With 13.6 V standoff and 22.5 V clamp at 67 A peak pulse, it sits across the 12 V input to shunt surge energy away from downstream regulators like LM2596 or TPS5430. Engineers place it within 50 mm of the input connector with a 1 A fuse upstream. Compared to MOVs, TVS diodes offer sub-nanosecond response time and tight voltage clamping, critical for PLC inputs and industrial sensor interfaces exposed to long cable runs.
Recomendado
Automotive 12 V Load-Dump Suppression
The 1.5KE16ARL4G serves as secondary transient suppression on automotive 12 V body and chassis ECUs. While a primary load-dump TVS (e.g. 1.5KE33A) handles the 35-40 V main event, the 1.5KE16ARL4G clamps residual transients to 22.5 V protecting CAN transceivers like TJA1050 or BCM modules. Its 1500 W rating handles the energy of secondary inductive kickback from relay coils and solenoids, with -65 C to +175 C junction range covering under-hood automotive environments.
Recomendado
Relay and Solenoid Inductive Kickback Clamping
When a 12 V relay coil or solenoid is de-energized, the inductive flyback can reach hundreds of volts, destroying driver transistors and generating EMI. The 1.5KE16ARL4G clamps this kickback to 22.5 V maximum, protecting MOSFET drivers like IRF540N or ULN2003 darlington arrays. Its 67 A peak pulse handles the initial inductive spike, while the Surmetic DO-201AA axial package withstands the thermal cycling of repeated switching. This application pattern is standard in automotive ECU design.
Recomendado
Telecom Line Driver Protection
The 1.5KE16ARL4G protects telecom line-interface transformers and SLICs from external surges on tip-lever pairs. With 13.6 V working voltage matched to typical -48 V telecom rails (when used on a derived 12 V rail), it clamps induced lightning surges to within the line-driver's absolute maximum. Its unidirectional polarity suits the protection of asymmetric SLIC outputs. Designers typically combine it with a PTC and primary gas discharge tube (GDT) in a coordinated protection scheme.
Recomendado
SMPS Output Rectifier Snubbing
In switch-mode power supplies, the 1.5KE16ARL4G clamps reverse-recovery spikes from secondary rectifiers, reducing EMI and protecting downstream bulk capacitors. Placed in parallel with the Schottky rectifier, it absorbs the high-frequency ringing that occurs when the MOSFET switches. Its 1500 W rating handles the worst-case spike energy, while its fast response time prevents the ringing from coupling into the output filter. This pattern is common in 12 V to 5 V buck-derived supplies.
Recomendado
Test and Measurement Equipment Input Protection
The 1.5KE16ARL4G protects oscilloscope and data acquisition front-ends from accidental over-voltage on input BNC connectors. With 22.5 V maximum clamp and 67 A peak pulse, it handles 12 V mis-wire events and small inductive transients on bench-top test setups. Its through-hole DO-201AA package suits retrofit protection boards. For high-bandwidth signal paths, designers add a 100 ohm series resistor upstream to limit fault current. This is a low-cost insurance against lab accidents.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para 1.5KE16ARL4G — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 1.5KE16A | 1.5KE16A | 1.5KE16A | 1.5KE16A | 1.5KE16A |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | Littelfuse | Vishay Intertechnology | STMicroelectronics | Diodes Incorporated |
| Package | DO-201AA (Surmetic axial) | DO-201AA (axial) | DO-201AA (axial) | DO-201AA (axial) | DO-201AA (axial) | DO-201AA (axial) |
| Peak Pulse Power (10/1000 us) | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W |
| Reverse Standoff (Vrwm) | 13.6 V | 13.6 V | 13.6 V | 13.6 V | 13.6 V | 13.6 V |
| Clamping Voltage (Vc) max | 22.5 V | 22.5 V | 22.5 V | 22.5 V | 22.5 V | 22.5 V |
| Peak Pulse Current (Ipp) | 67 A | 67 A | 67 A | 67 A | 67 A | 67 A |
| Polarity | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional |
| Operating Temperature | -65 C to +175 C | -65 C to +175 C | -65 C to +175 C | -65 C to +175 C | -65 C to +175 C | -65 C to +175 C |
Diferenciadores clave
- Surmetic axial package with through-hole leads (frente a P6KE16A)
- Industry-standard DO-201AA footprint enables broad second-source availability (frente a Proprietary TVS packages)
- 1500 W peak pulse with 67 A Ipp rating (frente a SMAJ16A)
Notas de diseño
The 1.5KE16ARL4G is rated for 5 W steady-state dissipation at lead length of 3/8 inch (9.5 mm) and 25 C ambient. Per the onsemi datasheet thermal derating curve, this drops linearly to 0 W at 175 C junction. For continuous operation in breakdown (which is NOT recommended for TVS diodes), the lead length must match the datasheet figure or the dissipation rating becomes invalid. For through-hole mounting, ensure the lead length inside the PCB is no longer than 9.5 mm to preserve the 5 W rating.
Mount the TVS as close as physically possible to the input connector or the protected IC - within 50 mm where layout allows. Minimize the loop area between the TVS, the protected line, and ground to reduce parasitic inductance, which can add several volts of overshoot during fast transients. Use wide ground traces (at least 2 mm) and keep the TVS body perpendicular to the direction of expected surge current flow. Place a 1 A fast-blow fuse upstream so the TVS does not become a continuous-current path during fault events.
Do NOT operate the TVS continuously in breakdown - this is a transient suppressor, not a voltage regulator. Continuous conduction will cause thermal runaway and eventual failure. Ensure that the protected rail's normal operating voltage stays below the maximum standoff (Vrwm = 13.6 V for this part); excursions into breakdown should only occur during transient events. For unidirectional parts, observe polarity - the banded (cathode) lead goes to the higher-voltage side. Reverse mounting of a unidirectional TVS will cause conduction at normal operating voltage.
Información de cumplimiento
RoHS compliant per onsemi product page. Not AEC-Q100 qualified - for automotive AEC-Q100 qualified TVS, consider parts from dedicated automotive lines. Lead-free (Pb-free) and halogen-free per onsemi materials declaration.
