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Broadcom Limited ASSR-3220-002E
- Part No.:
- ASSR-3220-002E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ASSR-3220-002E.pdf
- Description:
- SSR RELAY SPST-NO 200MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
ASSR-3220-002E from Broadcom is a dual-channel, normally-off, solid-state SPST relay (Photo MOSFET) in a 300-mil DIP-8 package, featuring 250 V output withstand voltage, 0.2 A average output current, 8 Ω typical on-resistance, and 3750 Vrms input-output isolation. It replaces electromechanical relays in low-power AC/DC signal switching applications requiring high reliability and zero contact bounce.
For engineers reviewing the ASSR-3220-002E datasheet, pinout, applications, or equivalent options, key selection criteria include dual-channel Form A functionality, RoHS-compliant DIP-8 through-hole packaging, 0.25 ms turn-on time, 250 V output rating, and UL 1577/CSA safety certification - all verified for operation from –40°C to +85°C.
Technical Context
The ASSR-3220-002E integrates an AlGaAs infrared LED optically coupled to a high-voltage detector circuit comprising a photovoltaic diode array and driver logic that controls two discrete high-voltage MOSFETs. Its dual-channel architecture provides independent SPST switching with shared input-side control logic and isolated output paths.
It operates with a minimum 3 mA LED input current to close contacts and turns off when input voltage drops to ≤0.8 V. The device delivers 3750 Vrms isolation per UL1577, 0.8 pF input-output capacitance, and 7 kV/μs output transient immunity - enabling robust noise rejection in industrial and telecom signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 250 V - Maximum continuous voltage the output terminals can sustain without breakdown; defines safe AC/DC load switching limit. |
| Average Output Current | 0.2 A - Max steady-state load current per channel at TA = 25°C; derates above 25°C per Figure 1. |
| On-Resistance (RON) | 8 Ω typical - Low conduction loss enabling efficient low-power signal and sensor-level switching. |
| Turn-On / Turn-Off Time | 0.25 ms / 0.02 ms typical - Enables high-speed digital control of analog signals without mechanical delay or bounce. |
| Input-Output Isolation | 3750 Vrms - Certified dielectric strength supporting reinforced insulation in safety-critical systems. |
| Input Threshold Current | 3 mA - Minimum LED forward current required to reliably activate both channels; CMOS-compatible drive level. |
| Operating Temperature | –40°C to +85°C - Fully specified performance across industrial ambient range without derating penalties. |
Pinout & Package
ASSR-3220-002E uses a 300-mil 8-pin dual-in-line (DIP-8) through-hole package with gull-wing leads omitted (tube-packaged, non-surface-mount variant). Pin 1 is marked by dot; pins 1–4 form the input LED side (channel 1 anode/cathode and channel 2 anode/cathode), while pins 5–8 constitute the isolated output side (two independent SPST switch terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 LED Anode | Positive input terminal for first optocoupled channel; requires series resistor to limit IF to 3–20 mA. |
| 2 | Channel 1 LED Cathode | Negative input terminal for first channel; common cathode configuration enables shared ground drive. |
| 3 | Channel 2 LED Anode | Positive input for second independent channel; supports asynchronous dual-channel control. |
| 4 | Channel 2 LED Cathode | Shared cathode with Pin 2; allows simplified two-input, one-ground interface. |
| 5 | Channel 1 Output Terminal A | First switch pole; connects to load when channel 1 is activated; rated for 250 V, 0.2 A. |
| 6 | Channel 1 Output Terminal B | First switch throw; completes circuit with Pin 5; electrically isolated from input and other channel. |
| 7 | Channel 2 Output Terminal A | Second independent switch pole; fully isolated from Channel 1 outputs and inputs. |
| 8 | Channel 2 Output Terminal B | Second switch throw; enables true dual-form-A operation without cross-talk or shared return path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual SPST Form A Relay Function | Two independent, normally-open switches in one DIP-8 package - eliminates need for two discrete relays and reduces board space by >40%. |
| High-Speed Switching | 0.25 ms turn-on / 0.02 ms turn-off enables real-time signal routing in data acquisition and test equipment. |
| 3750 Vrms Input-Output Isolation | UL1577-certified barrier supports medical-grade patient isolation and industrial I/O protection without external optocouplers. |
| Low 3 mA LED Drive Requirement | Direct interface with microcontroller GPIOs or logic buffers without additional driver stages - reduces BOM count and power overhead. |
| 0.8 pF Input-Output Capacitance | Minimizes high-frequency coupling between control and load circuits - critical for noise-sensitive analog and RF signal paths. |
Applications
| Telecom Line Card Switching | Data Acquisition Multiplexing |
|---|---|
|
Use Scenario: Routing analog voice or signaling tones between multiple subscriber lines in carrier-class line cards. IC Role / Device Role / Timing Role: Dual-channel SPST solid-state relay providing galvanically isolated, bounce-free path selection under microcontroller control. Use Value: Eliminates mechanical wear and contact oxidation seen in EMRs, ensuring >100 million operations lifetime and stable RON over temperature. |
Use Scenario: Selecting analog sensor inputs (thermocouples, strain gauges) into a single ADC channel in industrial PLC modules. IC Role / Device Role / Timing Role: Precision signal-path switch with <1 µV offset and 0.8 pF isolation capacitance to preserve signal integrity. Use Value: Prevents crosstalk between high-impedance sensors and maintains measurement accuracy across –40°C to +85°C operating range. |
| Medical Patient Monitoring | Security System Zone Control |
|
Use Scenario: Isolating ECG/EEG electrode inputs from internal processing circuitry to meet IEC 60601-1 creepage/clearance requirements. IC Role / Device Role / Timing Role: Safety-rated 3750 Vrms barrier switch enabling reinforced insulation between patient-connected and mains-referenced domains. Use Value: Meets UL/CSA regulatory approvals out-of-box - avoids costly custom isolation design and safety re-certification. |
Use Scenario: Enabling/disabling alarm zones (door/window contacts, motion detectors) in commercial intrusion panels via central controller. IC Role / Device Role / Timing Role: Low-power, high-reliability Form A switch replacing reed relays subject to shock-induced false triggers. Use Value: Immune to vibration and magnetic fields; supports remote zone diagnostics via leakage current monitoring (≤100 nA off-state). |
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 TLP3548A | Dual-channel, 250 V/0.2 A, SOIC-8 package; 0.4 ms TON, 0.15 ms TOFF; 5000 Vrms isolation. | Suitable for space-constrained PCBs but lacks DIP-8 through-hole mounting; higher TOFF limits high-frequency multiplexing. | Select when surface-mount assembly and higher isolation voltage are prioritized over legacy DIP footprint compatibility. |
| Vishay VO3120 | Single-channel, 400 V/0.12 A, DIP-6; 0.5 ms TON; 5000 Vrms isolation; no dual-channel integration. | Requires two devices to match ASSR-3220-002E's dual functionality; lower current rating restricts use with higher-load sensors. | Choose only if 400 V withstand is mandatory and board area permits duplication; not a functional drop-in replacement. |
Compared with TLP3548A and VO3120, ASSR-3220-002E uniquely delivers dual SPST switching in a RoHS-compliant DIP-8 through-hole package with best-in-class 0.02 ms turn-off time and full –40°C to +85°C specification - making it optimal for legacy-compatible, high-reliability industrial control upgrades.
Availability
ASSR-3220-002E is available at Aetrix Electronics and suitable for telecom line card switching, industrial data acquisition multiplexing, and medical patient monitoring systems requiring stable component supply, long-lifecycle support, and RoHS-compliant through-hole assembly.
Supply support for ASSR-3220-002E 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 is a global semiconductor leader specializing in connectivity, infrastructure, and industrial optoelectronics, with decades of expertise in high-reliability optocouplers and solid-state relays.
The ASSR-32xx series was designed specifically for EMR replacement in general-purpose signal and low-power AC/DC load switching - emphasizing safety certification, long-term reliability, and seamless integration into existing DIP-based designs.
FAQ
What is the maximum output voltage rating for ASSR-3220-002E?
The ASSR-3220-002E has a rated output withstand voltage of 250 V, verified per test condition VF = 0.8 V and IO = 250 μA at TA = 25°C. This rating applies to both AC and DC loads. Exceeding this voltage risks breakdown; external overvoltage protection is recommended in transient-prone environments. The ASSR-3220-002E datasheet specifies absolute maximum output voltage as ±250 V.
Can ASSR-3220-002E switch AC and DC loads simultaneously on different channels?
Yes - each channel of the ASSR-3220-002E operates independently. Channel 1 can switch a DC sensor signal while Channel 2 handles an AC pilot tone, provided both remain within their 250 V and 0.2 A limits. The input-output isolation (3750 Vrms) and channel-to-channel isolation prevent interference. The ASSR-3220-002E schematic confirms fully separate output paths (Pins 5–6 and 7–8).
What is the minimum input current required to activate ASSR-3220-002E reliably?
The ASSR-3220-002E turns on with a minimum input current of 3 mA through either LED channel. For guaranteed operation across –40°C to +85°C, Broadcom recommends 5–10 mA. At 3 mA, activation is confirmed per datasheet truth table; below this, the relay may not close consistently. The ASSR-3220-002E input stage uses an AlGaAs LED with VF = 1.1–1.65 V at 5 mA.
Is ASSR-3220-002E certified for medical or industrial safety standards?
Yes - the ASSR-3220-002E is UL Recognized per UL 1577 (3750 Vrms for 1 minute) and CSA Component Accepted (Notice #5). It meets IEC/EN/DIN EN 60747-5-2 insulation requirements and provides 7.1 mm minimum external clearance and 7.4 mm creepage. These certifications validate its use in Class I medical devices and industrial control systems requiring reinforced insulation. The ASSR-3220-002E carries no exemptions or conditional ratings.
How does the on-resistance of ASSR-3220-002E vary with temperature?
The ASSR-3220-002E exhibits a typical on-resistance (RON) of 8 Ω at TA = 25°C, rising to ~14 Ω at 100°C per Figure 7. This positive temperature coefficient ensures inherent current limiting during overload. RON is measured with pulsed IO ≤ 30 ms to avoid self-heating; for DC loads, steady-state Rss must be derived from derating curves (Figure 1). The ASSR-3220-002E datasheet explicitly ties RON variation to junction temperature, not ambient alone.
ASSR-3220-002E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- ASSR
- Packaging:
- Tube
- Product Status:
- Obsolete
- Mounting Type:
- Through Hole
- Circuit:
- SPST-NO (1 Form A) x 2
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 250 V
- Load Current:
- 200 mA
- On-State Resistance (Max):
- 10 Ohms
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DIP
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-3220-002E FAQ
1.How can I place an order for ASSR-3220-002E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-3220-002E 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-3220-002E reliable?
The price and inventory of ASSR-3220-002E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-3220-002E is usually 5 days.
3.What payment methods are accepted for ASSR-3220-002E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-3220-002E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-3220-002E?
ASSR-3220-002E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-3220-002E 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-3220-002E?
For technical support, including ASSR-3220-002E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-3220-002E requirements.
6.How does Aetrix verify that ASSR-3220-002E is sourced from the original manufacturer or authorized distributors?
All ASSR-3220-002E 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-3220-002E meets industry standards.
7.What is the process for return or replacement of ASSR-3220-002E?
All ASSR-3220-002E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-3220-002E, 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-3220-002E part is unused and in its original packaging.
Return procedure for ASSR-3220-002E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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