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Broadcom Limited ASSR-4111-501E
- Part No.:
- ASSR-4111-501E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 6-SMD (0.300", 7.62mm)
- Datasheet:
-
ASSR-4111-501E.pdf
- Description:
- SSR RELAY SPST-NO 120MA 0-400V
- Quantity:
- Payment:
- Shipping:
Inventory:7,946
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Product details
Overview
ASSR-4111-501E from Broadcom is a single-channel, normally-off solid-state relay (Photo MOSFET) in a 300-mil DIP-6 gull-wing surface-mount package. It features 400 V output withstand voltage, 0.12 A AC/DC current rating (0.24 A DC-only), 16 Ω typical on-resistance (5.5 Ω in DC-only configuration), and operates across –40°C to +85°C. It replaces electromechanical relays in telecom switching and industrial control signal isolation.
For engineers reviewing the ASSR-4111-501E datasheet, pinout, applications, or equivalent options, key selection criteria include input LED drive compatibility (3 mA min turn-on), output configuration flexibility (AC/DC vs. DC-only), isolation rating (3750 Vrms), transient immunity (>1 kV/μs), and thermal derating behavior for sustained load switching.
Technical Context
The ASSR-4111-501E integrates an AlGaAs infrared LED optically coupled to a high-voltage photovoltaic diode array and dual-MOSFET driver circuit. Its output stage uses discrete high-voltage MOSFETs switched via photovoltaic gate drive - no external bias required.
It implements Form A (SPST-NO) relay functionality with galvanic isolation, enabling bidirectional AC/DC signal or low-power load switching. Input-to-output insulation meets UL1577 (3750 Vrms/1 min) and CSA Component Acceptance Notice #5, with minimum creepage (7.4 mm) and clearance (7.1 mm).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 400 V - supports safe switching of 240 VAC RMS and 350 VDC loads without external snubbing |
| Max Output Current | 0.12 A (AC/DC), 0.24 A (DC-only) - enables direct control of solenoids, LEDs, and logic-level sensors |
| On-Resistance | 16 Ω typical (AC/DC), 5.5 Ω typical (DC-only) - minimizes I²R loss and self-heating during continuous conduction |
| Turn-On/Off Time | 0.25 ms / 0.02 ms typical - supports >1 kHz switching frequency in PWM-controlled systems |
| Input Threshold | 3 mA min LED current - ensures reliable activation from CMOS/TTL outputs without buffer stages |
| Isolation Voltage | 3750 Vrms - satisfies reinforced insulation requirements for medical and industrial safety standards |
| Operating Temp | –40°C to +85°C - validated for use in uncontrolled ambient environments including factory floors and telecom cabinets |
Pinout & Package
ASSR-4111-501E uses a 300-mil DIP-6 gull-wing surface-mount package (JEDEC MS-012 variant), with 2.54 mm pitch, 7.62 mm body width, and 9.65 mm length. Pin 1 is marked by dot; pins 1–3 form the input LED anode/cathode/common; pins 4–6 form the output switch terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | LED Anode | Positive input terminal for infrared LED; requires series resistor to limit IF to 3–20 mA |
| Pin 2 | LED Cathode | Negative LED terminal; referenced to system ground or low-side driver |
| Pin 3 | LED Common | Internally tied to cathode (Pin 2); used in AC-coupled or floating input configurations |
| Pin 4 | Output Terminal 1 | One side of MOSFET output switch; connects to load or supply rail |
| Pin 5 | Output Terminal 2 | Second side of MOSFET output switch; completes isolated load path |
| Pin 6 | Output Common | Internally tied to Pin 5; used for DC-only connection to reduce R(ON) to 5.5 Ω |
Key Features
| Feature | Design Value |
|---|---|
| CMOS-compatible input | 3 mA turn-on threshold enables direct drive from microcontrollers and FPGA I/O without level-shifting |
| DC-only output mode | Configuring Pins 5 & 6 as common reduces R(ON) to 5.5 Ω and increases Io to 0.24 A for DC loads |
| High-speed switching | 0.25 ms turn-on and 0.02 ms turn-off support precise timing in data acquisition and test equipment |
| Transient immunity | 1 kV/μs dVO/dt rating prevents false triggering in noisy industrial power environments |
| Regulatory compliance | UL1577 recognition and CSA approval simplify end-equipment safety certification |
Applications
| Telecom Signal Switching | Industrial PLC I/O Isolation |
|---|---|
Use Scenario: Routing analog voice signals or digital control lines between line cards in carrier-grade access equipment. IC Role / Device Role / Timing Role: Solid-state SPST relay providing galvanically isolated signal path with sub-millisecond switching. Use Value: Eliminates mechanical wear and contact bounce while maintaining signal integrity up to 100 kHz bandwidth. | Use Scenario: Isolating 24 VDC sensor inputs and 120 VAC actuator outputs in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Input/output interface relay ensuring field-side noise does not couple into controller logic ground. Use Value: Provides 3750 Vrms isolation and 7.4 mm creepage to meet IEC 61000-4-5 surge immunity and functional safety requirements. |
| Medical Diagnostic Equipment | Security System Zone Control |
Use Scenario: Enabling/disabling patient-connected analog front-end channels in ECG or EEG monitoring units. IC Role / Device Role / Timing Role: Safety-isolated switch for signal path selection, meeting BF-rated patient isolation requirements. Use Value: Delivers certified 3750 Vrms input-output withstand and <100 nA leakage at 400 V, critical for low-noise biopotential measurement. | Use Scenario: Controlling power to perimeter alarm sensors (PIR, door contacts) in commercial security panels. IC Role / Device Role / Timing Role: Low-power, long-life replacement for reed relays in zone supervision circuits. Use Value: Supports >10⁹ operations with zero contact degradation, eliminating maintenance cycles in inaccessible installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Toshiba TLP3558A | 6-pin DIP, 400 V/0.15 A, 10 Ω R(ON), 0.2 ms TON - higher current but no DC-only mode | Optimized for AC load switching only; lacks ASSR-4111-501E's dual-mode (AC/DC or DC-only) output configuration | Select when fixed 0.15 A AC rating suffices and board layout prioritizes lower R(ON) over configurability |
| Vishay VO3120 | 6-pin DIP, 400 V/0.12 A, 20 Ω R(ON), 0.5 ms TON - slower switching, no DC-only enhancement | Designed for general-purpose relay replacement where speed and low R(ON) are secondary to cost | Choose for legacy designs requiring drop-in footprint compatibility with relaxed timing and efficiency targets |
Compared with TLP3558A and VO3120, the ASSR-4111-501E uniquely supports both AC/DC and DC-only output modes - enabling either 0.12 A at 16 Ω or 0.24 A at 5.5 Ω - while delivering the fastest turn-off (0.02 ms) and highest transient immunity (1 kV/μs) in its class.
Availability
ASSR-4111-501E is available at Aetrix Electronics and suitable for telecom switching, industrial PLC I/O isolation, and medical diagnostic equipment requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle assurance.
Supply support for ASSR-4111-501E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Broadcom Inc. is a global semiconductor leader specializing in infrastructure software, networking, and optoelectronic components for data center, enterprise, and industrial applications.
The ASSR-41xx Series was designed as a high-reliability, safety-certified solid-state relay family targeting EMR and reed relay replacement in signal and low-power load switching across telecom, industrial, and medical systems.
FAQ
What is the minimum input current required to activate the ASSR-4111-501E?
The ASSR-4111-501E turns on with a minimum input current of 3 mA through its infrared LED. This low threshold ensures compatibility with standard CMOS and TTL logic outputs without external drivers. For guaranteed performance across the full –40°C to +85°C operating range, Broadcom recommends operating at 5 mA. The ASSR-4111-501E datasheet specifies IF(ON) = 3–20 mA under recommended conditions.
How does the DC-only connection mode affect the ASSR-4111-501E's electrical performance?
In DC-only mode (Pins 5 and 6 shorted), the ASSR-4111-501E achieves 0.24 A maximum output current and 5.5 Ω typical on-resistance - doubling current capacity and reducing conduction loss by ~65% versus AC/DC mode. This configuration requires unidirectional load current and disables AC capability. The ASSR-4111-501E schematic explicitly defines Pins 4–5–6 for this optimized DC path.
Does the ASSR-4111-501E require an external power supply for its output stage?
No, the ASSR-4111-501E does not require an external power supply for its output stage. Its photovoltaic detector generates sufficient gate drive voltage from the input LED to fully enhance the internal MOSFETs. This self-powered operation eliminates auxiliary bias rails and simplifies system design - a core feature distinguishing the ASSR-4111-501E from opto-FETs requiring external VDD.
What safety certifications apply to the ASSR-4111-501E?
The ASSR-4111-501E is UL Recognized per UL1577 (3750 Vrms for 1 minute) and approved under CSA Component Acceptance Notice #5. It also meets IEC/EN/DIN EN 60747-5-2 insulation requirements. These certifications validate its suitability for reinforced insulation in Class I and Class II equipment, including medical BF-rated applications when implemented per manufacturer guidelines in the ASSR-4111-501E datasheet.
Can the ASSR-4111-501E switch AC signals, and what is its maximum frequency?
Yes, the ASSR-4111-501E supports bidirectional AC signal switching up to 100 kHz, limited by its 0.25 ms turn-on and 0.02 ms turn-off times. Its MOSFET output stage has no polarity constraint, enabling true AC conduction. However, for frequencies above 1 kHz, designers must consider output capacitance (0.5 pF) and ensure load impedance avoids resonance with stray inductance - parameters fully characterized in the ASSR-4111-501E datasheet Figures 15 and 10.
ASSR-4111-501E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- ASSR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 400 V
- Load Current:
- 120 mA
- On-State Resistance (Max):
- 25 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-DIP Gull Wing
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-4111-501E FAQ
1.How can I place an order for ASSR-4111-501E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-4111-501E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ASSR-4111-501E reliable?
The price and inventory of ASSR-4111-501E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-4111-501E is usually 5 days.
3.What payment methods are accepted for ASSR-4111-501E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-4111-501E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-4111-501E?
ASSR-4111-501E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-4111-501E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ASSR-4111-501E?
For technical support, including ASSR-4111-501E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-4111-501E requirements.
6.How does Aetrix verify that ASSR-4111-501E is sourced from the original manufacturer or authorized distributors?
All ASSR-4111-501E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ASSR-4111-501E meets industry standards.
7.What is the process for return or replacement of ASSR-4111-501E?
All ASSR-4111-501E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-4111-501E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ASSR-4111-501E part is unused and in its original packaging.
Return procedure for ASSR-4111-501E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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