TS117STR - 350V 120mA 1-Form-A Telecom Relay | IXYS
N.º da peça: TS117STR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.86 | $2,86 |
| 10 | $2.68 | $26,80 |
| 25 | $2.38 | $59,50 |
| 50 | $2.27 | $113,50 |
| 100 | $2.14 | $214,00 |
| 250 | $1.91 | $477,50 |
| 500 | $1.79 | $895,00 |
TS117STR Visão geral
An OptoMOS solid-state relay is a semiconductor device that replaces an electromechanical relay by using an LED input optically coupled to a MOSFET output stage. The SSRs occupy the broader category hierarchy of solid-state relays -> relays -> electromechanical switches -> discrete switches -> electronic components. The TS117STR family integrates the input-side optical isolation and the output-side switching MOSFET inside one IC, eliminating the need for a separate optocoupler plus discrete MOSFET pair that designers would otherwise have to qualify for surge, isolation, and creepage/clearance separately. This consolidation simplifies BOM management and shortens PCB layout review cycles.
Key features include a 350 V peak load voltage rating, 120 mA continuous load current handling, a low 35 ohm on-resistance (RON), and an integrated optically-coupled input that delivers typical 3750 Vrms of galvanic isolation between the input control side and the switched load side. The device operates across -40 C to +85 C, includes zero-voltage-crossing turn-on characteristics to minimize EMI, and is supplied in a small 8-pin SMD gull-wing package suitable for tape-and-reel assembly lines. A current-limiting version is also offered in the same family (TS117STR-L suffix).
Typical applications include telephone line interface cards, ring-signal switching, line-test access, on-hook/off-hook switching, line-fault isolation, fax and modem line cards, and T1/E1 interface protection. The integrated optocoupler plus SSR replaces two PCBs' worth of discrete components in traditional telecom designs. When designing with the TS117STR, ensure sufficient creepage distance around the 8-pin SMD land pattern to maintain the rated isolation voltage, and place a TVS diode across the output to clamp inductive ring or test-pulse transients to within the 350 V maximum load voltage rating.
Alternativas drop-in para TS117STR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TS117STR (mesmo formato e footprint) — diferindo em Package, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TS122STR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TS117S
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.05 / unidade
Ver ficha técnica →TS117STR-L
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LCA125
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PVR1300N
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TS117STR Classificações máximas e características elétricas
| Manufacturer | IXYS Integrated Circuits Division |
| Part Type | Multifunction Telecom Switch (Solid-State Relay + Optocoupler) |
| Contact Form | 1-Form-A (SPST-NO) |
| Load Voltage (Max) | 350 V |
| Load Current (Max) | 120 mA |
| On-Resistance (RON, Max) | 35 ohm |
| Input Drive | TTL/CMOS compatible, optically isolated |
| Isolation Voltage | 3750 Vrms (typical) |
| Faixa de temperatura de operação | -40 C to +85 C |
| Encapsulamento | 8-SMD (gull-wing) |
| Tipo de montagem | Surface Mount |
| Power Dissipation | 800 mW |
| Number of Circuits | 2 (input LED + output SSR) |
| Status RoHS | ROHS3 Compliant |
| Lead-Free Status | Lead Free |
| Current-Limiting Version | Available (TS117STR-L suffix) |
Configuração de pinos do TS117STR
| Pino 1 | LED Anode (+) — Input-side optocoupler LED anode; connect to logic supply through current-limit resistor |
| Pino 2 | LED Cathode (-) — Input-side optocoupler LED cathode; connect to logic ground |
| Pino 3 | NC — Not connected (per datasheet) |
| Pino 4 | NC — Not connected (per datasheet) |
| Pino 5 | MOSFET Drain — Output-side MOSFET drain; switched load terminal |
| Pino 6 | MOSFET Source — Output-side MOSFET source; load return terminal |
| Pino 7 | NC — Not connected (per datasheet) |
| Pino 8 | NC — Not connected (per datasheet) |
Aplicações típicas
TS117STR é adequado para 7 aplicaçãos: Telephone Line Interface Cards, Ring-Signal Switching, Line-Test Access Multiplexing, On-Hook / Off-Hook Switching, Modem and Fax Line Cards, T1/E1 Interface Protection, Industrial Process Control Isolation.
Telephone Line Interface Cards
The TS117STR's 350 V peak load voltage rating and 3750 Vrms input-to-output isolation make it ideal for line-interface cards that must switch battery feed and ringing signals across the on-hook and off-hook states. Its 120 mA continuous load current handles off-hook DC loop current up to 120 mA, while the 35 ohm RON introduces only modest voltage drop across the line. Integrated optical isolation eliminates a separate optocoupler, halving PCB area. Compared to electromechanical line-interface relays, the TS117STR has zero contact bounce and sub-millisecond turn-on time, critical for ring-trip detection during transient line testing.
Recomendado
Ring-Signal Switching
The TS117STR directly switches 90 Vpk / 20 Hz ring waveforms superimposed on the DC battery feed in analog telephone networks, eliminating the discrete optocoupler plus triac pair traditionally used. Its 350 V peak load voltage provides margin for transient overshoot during ring cadence, and its optically-coupled input ensures the microcontroller side is fully isolated from the line side. Unlike electromechanical ring relays, the TS117STR produces no audible click during ring cadence, improving customer experience in on-premise PBX equipment and VoIP analog-terminal adapters with FXS ports.
Recomendado
Line-Test Access Multiplexing
Central-office line-test access switches multiplex test signals from a shared test-head onto individual subscriber lines; the TS117STR serves as the per-line test-access switch because its low-leakage output stage preserves the test-head measurement integrity. Its 120 mA rating supports test signatures within the 100 mA range, and the 3750 Vrms isolation protects the test-head from line-side surges during cross-bar testing. Solid-state switching eliminates the test-cost of electromechanical relays that fail at high switching cycles in automated loop-test systems (LTS) deployed by incumbent telecom operators.
Recomendado
On-Hook / Off-Hook Switching
Subscriber-line interface circuits (SLICs) require a switch to connect/disconnect the 48 V battery feed during on-hook and off-hook transitions; the TS117STR provides that function with the same OptoMOS multifunction topology. Its 35 ohm RON creates a 4.2 V drop at 120 mA, accepting SLIC designs with appropriate current limiting. The integrated optocoupler removes the BOM cost of a separate isolation device and improves creepage/clearance budget on the densely-populated line-card. Designers typically pair the TS117STR with a TVS diode across the output to clamp inductive surges during on-hook transitions.
Recomendado
Modem and Fax Line Cards
External modem and fax boards require a switch to share the single subscriber line between the data-port and the handset; the TS117STR handles this line-sharing function with sub-millisecond switching. Its 350 V peak load voltage withstands the maximum ring and test-pulse transients on the public switched telephone network (PSTN), while the 35 ohm on-resistance meets the modem's template for DC termination. Compared to discrete optocoupler + MOSFET designs, the TS117STR simplifies FCC Part 68 qualification by integrating the isolation barrier into one IC.
Recomendado
T1/E1 Interface Protection
T1 (1.544 Mbps) and E1 (2.048 Mbps) digital trunk interfaces run at 100 ohm differential impedance and use -48 V battery feed; the TS117STR protects the T1/E1 line-interface unit by providing galvanic isolation plus a switchable test-access point. Its 350 V load voltage exceeds the maximum transient envelope on T1/E1 trunk lines, and the 120 mA load current handles DS1 line-power cross-connections during maintenance. Solid-state switching eliminates the mechanical chatter of legacy trunk-protection relays that degrade over decades of in-service life.
Recomendado
Industrial Process Control Isolation
Beyond telecom, the TS117STR is widely used to switch 240 VAC industrial loads from low-voltage microcontroller outputs, leveraging its 350 V voltage rating and 3750 Vrms isolation. Its TTL/CMOS-compatible input allows direct drive from 3.3 V or 5 V logic without a relay-driver transistor. The lack of moving parts and arc-free switching makes the TS117STR ideal for explosive-environment (ATEX/IECEx) industrial process control panels where electromechanical relay arcing is unacceptable. Compared to electromechanical relays, solid-state switching produces no audible coil buzz, an advantage in laboratory and medical-instrumentation applications.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TS117STR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TS122STR | TS117S | TS117STR-L | LCA125 | PVR1300N |
|---|---|---|---|---|---|---|
| Package | 8-SMD | 8-SMD - same | 8-DIP - different (through-hole) | 8-SMD - same | 8-SMD - same | 8-SMD - same |
| Brand | IXYS | IXYS - same | IXYS - same | IXYS - same | IXYS - same | IXYS - same |
| Load Voltage (Max) | 350 V | 250 V | 350 V | 350 V | 250 V | 100 V |
| Load Current (Max) | 120 mA | 170 mA | 120 mA | 120 mA | 170 mA | 360 mA |
| On-Resistance (RON) | 35 ohm | 20 ohm | 35 ohm | 35 ohm | 20 ohm | 5 ohm |
| Input Drive | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible |
| Current Limiting | No | No | No | Yes | No | No |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 4000 Vrms |
Principais diferenciais
- Integrated optocoupler plus SSR in single 8-SMD package (vs Discrete optocoupler + MOSFET pair)
- 350 V peak load voltage rating (vs TS122STR (250 V peak))
- Current-limiting version available (TS117STR-L) (vs TS117STR (no current limit))
- TTL/CMOS-compatible input drive at 5 mA (vs Electromechanical relay (requires 50-100 mA coil current))
Notas de projeto
Do not exceed the absolute maximum load voltage of 350 V on the TS117STR output. Inductive ring or test-pulse transients can exceed 350 V and destroy the output MOSFET; add a bidirectional TVS diode across the output (drain to source) clamped to 320 V working voltage. The 35 ohm RON introduces 4.2 V drop at 120 mA, which may affect DC line-feed designs - de-rate by calculating I^2 * RON loss at your maximum load current. Always include a 1 kohm or smaller pull-down on the LED input to keep the relay off during MCU startup or reset.
Estimated: at 120 mA continuous load current and 35 ohm RON, on-state power dissipation is approximately 0.5 W; plus 800 mW maximum total power dissipation per the datasheet. The 8-SMD package has no exposed thermal pad, so de-rate load current linearly above 50 C ambient. Use minimum 1 oz copper on both input and output side land patterns and avoid placing the device above heat sources on the PCB. For continuous 100 mA+ operation, consider forced-air cooling or down-rating to 80 mA to keep junction temperature below 100 C (estimated at theta_JA ~ 150 C/W).
Place the TS117STR such that the input-side LED pins and output-side MOSFET pins have maximum creepage distance between them, ideally using a slot in the PCB to maintain the rated 3750 Vrms isolation. Keep high-voltage tracks (drain/source) away from low-voltage tracks (LED anode/cathode) and route them on opposite sides of the package if possible. Add a small ferrite bead or 100 ohm resistor in series with the LED input to limit inrush current during fast transients. For tape-and-reel SMD assembly, follow IPC-7351 land-pattern guidelines for the 8-SMD gull-wing package.
The TS117STR's 35 ohm RON combined with line capacitance creates an RC time constant that may distort high-frequency signals. For T1/E1 (1.5/2 Mbps) line-pass-through applications, evaluate whether 35 ohm RON matches the 100 ohm differential cable impedance - if not, add series termination to control reflections. Use an oscilloscope probe on the output to verify clean switching waveforms during ring cadence or test-pulse events.
Informações de conformidade
ROHS3 compliant per distributor listings as of 2026-10-11. Lead-free finish confirmed. REACH SVHC declaration and halogen-free status should be requested from IXYS / Littelfuse directly. Not AEC-Q100 qualified; this part is not intended for automotive applications.
