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Broadcom Limited ASSR-1228-502E
- Part No.:
- ASSR-1228-502E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SMD (0.300", 7.62mm)
- Datasheet:
-
ASSR-1228-502E.pdf
- Description:
- SSR RELAY SPST-NO 200MA 0-60V
- Quantity:
- Payment:
- Shipping:
Inventory:4,160
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Product details
Overview
The ASSR-1228-502E from Broadcom is a dual-channel, normally-off, single-pole-single-throw (SPST) solid-state relay based on photo-MOSFET technology. It features optically isolated AlGaAs LED input stage driving two discrete high-voltage MOSFETs, with 60 V output withstand voltage, 0.2 A DC current rating (0.4 A in DC-only configuration), and typical on-resistance of 0.2 Ω at 200 mA. It is used for reliable signal switching in telecom and industrial control systems requiring galvanic isolation.
For engineers reviewing the ASSR-1228-502E datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-channel Form A relay equivalence, gull-wing surface-mount DIP-8 package, 3750 Vrms input-output isolation, low 3 mA turn-on threshold, and compatibility with CMOS-level drive signals.
Technical Context
The ASSR-1228-502E implements optical coupling between an AlGaAs infrared LED and a photovoltaic diode array that drives dual high-voltage MOSFET switches. Its input stage requires only 3 mA to activate, and it turns off when input voltage drops to ≤0.8 V - enabling direct interface with logic-level controllers without external buffering.
It provides bidirectional AC/DC switching capability with 60 V output voltage rating and supports both AC/DC and DC-only output configurations. In DC-only mode (e.g., ASSR-1219 Connection B), R(ON) drops to 0.1 Ω and IO rises to 0.4 A - though ASSR-1228 is rated for 0.2 A per channel under standard conditions, with derating above 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual-channel SPST (2 Form A relays); independent channel operation with shared input isolation |
| Input Threshold Current | 3 mA min to turn on - enables direct CMOS/TTL drive without current amplification |
| Output Withstand Voltage | 60 V - defines maximum safe voltage across output terminals before breakdown |
| On-Resistance (RON) | 0.2 Ω typical at 200 mA, 25°C - determines conduction loss and self-heating under load |
| Isolation Voltage | 3750 Vrms for 1 minute per UL1577 - certifies safety barrier integrity for reinforced insulation |
| Operating Temperature | –40°C to +85°C - specifies full performance range without derating for industrial environments |
| Package Type | 8-pin DIP with gull-wing surface-mount leads - compatible with reflow soldering per JEDEC J-STD-020 |
Pinout & Package
ASSR-1228-502E uses an 8-pin DIP package with gull-wing surface-mount leads (300-mil body width). The package meets RoHS compliance and is supplied in tape-and-reel format (1000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Input Anode/Cathode (LED array) | Pins 1–4 are internally connected as common-anode/cathode pair for dual-channel LED input; requires series resistor for current limiting |
| 5, 6, 7, 8 | Output Source/Drain (MOSFET pairs) | Pins 5–8 form two isolated output channels: (5,6) = CH1; (7,8) = CH2; bidirectional conduction path per channel |
Key Features
| Feature | Design Value |
|---|---|
| Opto-isolated dual SPST switching | Two independent, galvanically isolated 60 V/0.2 A channels in one package - replaces two electromechanical relays with zero bounce and no contact wear |
| Low drive requirement | 3 mA input current threshold - eliminates need for driver transistors when interfacing with microcontrollers or FPGAs |
| High-voltage isolation barrier | 3750 Vrms UL1577 rating - satisfies reinforced insulation requirements for medical and industrial safety standards |
| Fast switching speed | 0.13 ms typical turn-on, 0.06 ms typical turn-off - enables high-frequency signal routing not possible with mechanical relays |
| Low on-resistance | 0.2 Ω typical at 200 mA - minimizes I²R losses and thermal rise in power-sensitive PCB layouts |
Applications
| Telecom Line Switching | Data Multiplexer Control |
|---|---|
|
Use Scenario: Routing analog voice or data signals between multiple lines in PBX or VoIP gateway hardware. IC Role / Device Role / Timing Role: Solid-state relay providing isolated, bounce-free channel selection with sub-millisecond timing precision. Use Value: Eliminates mechanical relay wear and contact oxidation, ensuring >10⁹ operations lifetime and stable RON over temperature. |
Use Scenario: Enabling/disabling differential signal paths in high-speed serial data multiplexers (e.g., RS-485, CAN FD). IC Role / Device Role / Timing Role: Bidirectional analog switch with 60 V standoff, used for hot-swap-safe signal path isolation. Use Value: Maintains signal integrity up to 1 MHz due to low 0.8 pF input-output capacitance and <5 ms max switching time. |
| Industrial PLC I/O Modules | Medical Diagnostic Equipment |
|
Use Scenario: Isolating digital control outputs driving solenoids, valves, or indicator lamps in factory automation systems. IC Role / Device Role / Timing Role: Safety-rated output driver delivering 0.2 A per channel with reinforced insulation between controller and field side. Use Value: Meets IEC 61000-4-5 surge immunity and UL/CSA creepage/clearance requirements (7.4 mm creepage) for Class I equipment. |
Use Scenario: Signal path isolation in patient-connected ECG or EEG front-end modules where leakage current must be minimized. IC Role / Device Role / Timing Role: Reinforced insulation barrier with <1 μA output leakage at 60 V - critical for patient safety compliance. Use Value: Achieves 3750 Vrms withstand and CTI ≥175, satisfying IEC 60601-1 2× MOPP requirements without additional isolation components. |
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 | Dual-channel, 60 V/0.4 A, 1.5 Ω RON, SOIC-8 package | Higher RON limits use in low-loss power switching; smaller footprint but lower creepage (5.0 mm) | Preferred for space-constrained designs where 1.5 Ω RON is acceptable and UL1577 3750 Vrms is not required |
| Vishay VO3120 | Single-channel, 60 V/0.35 A, 0.35 Ω RON, DIP-6 gull-wing | Single-channel only; requires two devices for dual functionality; higher RON than ASSR-1228 | Used when board layout favors DIP-6 or when channel independence demands separate isolation barriers |
Compared with TLP3558A and VO3120, the ASSR-1228-502E delivers lower on-resistance (0.2 Ω), superior creepage (7.4 mm), and integrated dual-channel operation in a single DIP-8 gull-wing package - reducing component count and improving reliability in safety-critical industrial and medical switching.
Availability
ASSR-1228-502E is available at Aetrix Electronics and suitable for telecommunications switching, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ASSR-1228-502E 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 enterprise, industrial, and communications markets.
The ASSR-12XX series was designed as a drop-in solid-state replacement for electromechanical relays in high-reliability, low-maintenance signal routing applications - emphasizing optical isolation, long operational life, and safety certification.
FAQ
What is the maximum continuous output current per channel for ASSR-1228-502E?
The ASSR-1228-502E supports a maximum average output current of 0.2 A per channel at TA = 25°C. Derating is required above 25°C ambient, with safe operating area defined in Figure 4 of the datasheet. At 85°C ambient, maximum current drops to approximately 0.1 A per channel to maintain junction temperature below 125°C. This limit applies to both AC and DC loads.
Does ASSR-1228-502E support AC load switching?
Yes, the ASSR-1228-502E supports bidirectional AC/DC switching with a 60 V peak output voltage rating and 1 μA max output leakage at 60 V. Its photo-MOSFET architecture enables true bidirectional conduction, making it suitable for AC line-level signal routing in telecom and instrumentation applications - unlike unidirectional SSRs or optocouplers with discrete output transistors.
What is the input-to-output isolation rating for ASSR-1228-502E?
The ASSR-1228-502E is UL Recognized to 3750 Vrms for 1 minute per UL1577 and CSA-approved under Component Acceptance Notice #5. Its minimum creepage is 7.4 mm and clearance is 7.1 mm between input and output sides, meeting reinforced insulation requirements for medical (IEC 60601-1) and industrial (IEC 61000-4-5) safety standards.
Can ASSR-1228-502E replace two ASSR-1219 devices in a design?
Yes - the ASSR-1228-502E integrates two independent Form A SPST relay channels in one DIP-8 gull-wing package, functionally replacing two ASSR-1219 units. However, each channel retains identical 0.2 A/60 V ratings and shares the same input LED structure, so total input drive remains ~6 mA for simultaneous activation - not double the current of a single ASSR-1219.
What is the recommended soldering profile for ASSR-1228-502E?
The ASSR-1228-502E follows JEDEC J-STD-020 for lead-free reflow. Peak temperature must not exceed 260°C for ≤10 seconds. Preheat ramp rate: 1–3°C/s; soak: 150–200°C for 60–120 s; reflow: 235–260°C peak, time above liquidus: 30–60 s. Non-halide flux is required to prevent corrosion of internal bond wires and die surfaces.
ASSR-1228-502E 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) x 2
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 60 V
- Load Current:
- 200 mA
- On-State Resistance (Max):
- 10 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DIP Gull Wing
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-1228-502E FAQ
1.How can I place an order for ASSR-1228-502E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-1228-502E 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-1228-502E reliable?
The price and inventory of ASSR-1228-502E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-1228-502E is usually 5 days.
3.What payment methods are accepted for ASSR-1228-502E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-1228-502E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-1228-502E?
ASSR-1228-502E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-1228-502E 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-1228-502E?
For technical support, including ASSR-1228-502E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-1228-502E requirements.
6.How does Aetrix verify that ASSR-1228-502E is sourced from the original manufacturer or authorized distributors?
All ASSR-1228-502E 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-1228-502E meets industry standards.
7.What is the process for return or replacement of ASSR-1228-502E?
All ASSR-1228-502E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-1228-502E, 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-1228-502E part is unused and in its original packaging.
Return procedure for ASSR-1228-502E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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