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Home > Products > Relays > Solid State Relays (SSR)

Broadcom Limited ASSR-3220-302E

Name: ASSR-3220-302E
Brand: Broadcom Limited
SKU: ASSR-3220-302E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ASSR-3220-302E

Manufacturer:: Broadcom Limited

Category:: Solid State Relays (SSR)

Package:: 8-SMD (0.300", 7.62mm)

Datasheet:: ASSR-3220-302E.pdf

Description:: SSR RELAY SPST-NO 200MA 0-250V

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Inventory:1,553

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Product details

Overview

ASSR-3220-302E from Broadcom is a dual-channel, normally-off, solid-state SPST relay (Photo MOSFET) with optical isolation, rated for 250 V output withstand voltage and 0.2 A average output current per channel at –40°C to +85°C. It features 8 Ω typical on-resistance, 0.25 ms turn-on time, and 3750 V_rms input-output isolation - used in industrial control I/O modules requiring reliable, bounce-free signal switching.

For engineers reviewing the ASSR-3220-302E datasheet, pinout, applications, or equivalent options, key selection criteria include dual-channel Form A replacement capability, gull-wing surface-mount DIP-8 packaging, DC/AC-compatible output configuration, and UL1577/CSA safety certification for functional insulation in safety-critical subsystems.

Technical Context

The ASSR-3220-302E integrates an AlGaAs infrared LED optically coupled to a high-voltage detector circuit comprising a photovoltaic diode array and driver that controls two discrete high-voltage MOSFETs. Each channel operates independently with CMOS-compatible input drive (3 mA min. turn-on current, ≤0.8 V turn-off threshold).

Its dual-channel architecture mirrors two independent 1 Form A electromechanical relays, supporting bidirectional AC/DC load switching up to 250 V with 0.8 pF input-output capacitance and >1 kV/μs transient immunity - enabling noise-immune operation in noisy industrial environments without contact arcing or wear-out mechanisms.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Withstand Voltage	250 V - maximum continuous voltage across output terminals before breakdown; defines safe operating range for AC mains or DC bus switching.
Average Output Current	0.2 A per channel - maximum steady-state load current at TA = 25°C; derates to zero at 85°C per Figure 1.
On-Resistance (R_ON)	8 Ω typical - conduction loss at 200 mA pulsed; determines I²R heating and voltage drop in low-power signal paths.
Turn-On / Turn-Off Time	0.25 ms / 0.02 ms typical - enables fast digital control of analog loads; supports PWM-like sequencing without mechanical delay.
Input-Output Isolation	3750 V_rms for 1 min (UL1577) - ensures functional safety separation between control logic and field-side circuits.
Input Forward Voltage	1.3 V typical at 5 mA - compatible with 3.3 V and 5 V logic outputs without series resistor recalculations.
Operating Temperature	–40°C to +85°C - validated performance across industrial ambient ranges without derating penalties below 70°C.

Pinout & Package

ASSR-3220-302E uses an 8-pin DIP package with gull-wing surface-mount leads (Option 302E), measuring 9.65 mm × 6.35 mm × 3.56 mm (0.380″ × 0.250″ × 0.140″). Pin 1 is marked by a dot; pins 1–4 form the isolated input side (LED anode/cathode pair per channel), and pins 5–8 form the isolated output side (MOSFET drain/source pairs per channel).

Pin/Terminal	Circuit Role	Design Meaning
1, 2	Channel 1 LED Anode / Cathode	Optical input for first relay channel; requires ≥3 mA forward current to close output contacts.
3, 4	Channel 2 LED Anode / Cathode	Independent optical input for second relay channel; electrically isolated from Channel 1 inputs.
5, 6	Channel 1 Output Drain / Source	High-voltage MOSFET switch terminals; bidirectional conduction when illuminated; 250 V rating applies across this pair.
7, 8	Channel 2 Output Drain / Source	Second isolated output switch; identical electrical specs to pins 5–6; no shared internal nodes with Channel 1.

Key Features

Feature	Design Value
Dual SPST Form A topology	Two independent, normally-open switches in one package - replaces two discrete EMRs or reed relays, reducing PCB area and assembly cost.
Gull-wing surface-mount DIP-8	Compatible with standard SMT reflow profiles (peak 260°C/10 s); eliminates through-hole drilling while maintaining legacy DIP footprint familiarity.
Low on-resistance drift	8 Ω typical at 25°C with <±15% variation over –40°C to +85°C - ensures stable voltage drop across temperature in precision analog switching.
High transient immunity	>1 kV/μs dV/dt rejection - suppresses false triggering from EFT bursts or inductive kickback in motor-control or solenoid-driver applications.
UL1577 & CSA certified	3750 V_rms isolation validated for 1 minute - satisfies reinforced insulation requirements in medical and industrial safety standards (IEC 61010-1).

Applications

Industrial PLC I/O Modules	Medical Patient Monitoring Inputs
Use Scenario: Isolating 24 V DC sensor signals and 120 V AC actuator commands in modular rack-mounted controllers. IC Role / Device Role / Timing Role: Dual-channel solid-state relay providing galvanic isolation and bounce-free switching for digital output cards and analog input protection circuits. Use Value: Eliminates mechanical relay wear-out and contact oxidation, extending mean time between failures (MTBF) beyond 10⁹ operations per channel.	Use Scenario: Switching ECG lead connections and isolation barriers in multi-parameter bedside monitors. IC Role / Device Role / Timing Role: Safety-isolated signal path selector ensuring patient-connected circuits meet IEC 60601-1 creepage/clearance and leakage current limits. Use Value: 3750 V_rms isolation and 4.9 mm minimum creepage meet BF-rated patient-applied part requirements without external transformers or optocouplers.
Telecom Line Card Protection	Security System Zone Controllers
Use Scenario: Protecting DSLAM line drivers from lightning-induced surges and ground-loop transients on twisted-pair copper lines. IC Role / Device Role / Timing Role: Fast-switching isolation barrier that decouples control logic from field-side surge paths while maintaining signal integrity. Use Value: 0.02 ms turn-off time prevents latch-up during transient events; >1 kV/μs dV/dt immunity blocks common-mode noise coupling into baseband circuits.	Use Scenario: Controlling door locks, motion detectors, and alarm siren outputs in centralized security panels with mixed AC/DC loads. IC Role / Device Role / Timing Role: Dual SPST switch enabling independent activation of magnetic locks (DC) and siren drivers (AC) from a single microcontroller GPIO bank. Use Value: Bidirectional 250 V output capability allows unified handling of both 12 V DC lock solenoids and 24 V AC sirens without external rectification or polarity management.

Industrial PLC I/O Modules

Medical Patient Monitoring Inputs

Use Scenario: Isolating 24 V DC sensor signals and 120 V AC actuator commands in modular rack-mounted controllers.

IC Role / Device Role / Timing Role: Dual-channel solid-state relay providing galvanic isolation and bounce-free switching for digital output cards and analog input protection circuits.

Use Value: Eliminates mechanical relay wear-out and contact oxidation, extending mean time between failures (MTBF) beyond 10⁹ operations per channel.

Use Scenario: Switching ECG lead connections and isolation barriers in multi-parameter bedside monitors.

IC Role / Device Role / Timing Role: Safety-isolated signal path selector ensuring patient-connected circuits meet IEC 60601-1 creepage/clearance and leakage current limits.

Use Value: 3750 V_rms isolation and 4.9 mm minimum creepage meet BF-rated patient-applied part requirements without external transformers or optocouplers.

Telecom Line Card Protection

Security System Zone Controllers

Use Scenario: Protecting DSLAM line drivers from lightning-induced surges and ground-loop transients on twisted-pair copper lines.

IC Role / Device Role / Timing Role: Fast-switching isolation barrier that decouples control logic from field-side surge paths while maintaining signal integrity.

Use Value: 0.02 ms turn-off time prevents latch-up during transient events; >1 kV/μs dV/dt immunity blocks common-mode noise coupling into baseband circuits.

Use Scenario: Controlling door locks, motion detectors, and alarm siren outputs in centralized security panels with mixed AC/DC loads.

IC Role / Device Role / Timing Role: Dual SPST switch enabling independent activation of magnetic locks (DC) and siren drivers (AC) from a single microcontroller GPIO bank.

Use Value: Bidirectional 250 V output capability allows unified handling of both 12 V DC lock solenoids and 24 V AC sirens without external rectification or polarity management.

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, 400 V/0.15 A, SOIC-8 package, 10 Ω R_ON, 0.5 ms T_ON	Higher voltage rating but lower current and slower switching; smaller footprint but no gull-wing option	Preferred where board space is constrained and 400 V withstand is required, but not suitable for high-speed sequencing.
Vishay VO3120	Single-channel, 400 V/0.3 A, DIP-6, 3.5 Ω R_ON, 0.5 ms T_ON, no gull-wing variant	Higher current and lower R_ON, but requires two devices for dual functionality and lacks surface-mount DIP-8 option	Select when higher load current per channel is critical and dual-channel integration is less important than conduction efficiency.

Compared with TLP3548A and VO3120, the ASSR-3220-302E uniquely delivers dual-channel operation in a gull-wing DIP-8 package with balanced 250 V/0.2 A ratings, sub-millisecond timing, and UL/CSA-certified 3750 V_rms isolation - making it optimal for space-constrained industrial I/O where reliability, safety compliance, and channel density are jointly prioritized.

Availability

ASSR-3220-302E is available at Aetrix Electronics and suitable for industrial PLCs, medical monitoring systems, telecom line cards, and security zone controllers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ASSR-3220-302E 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 isolation solutions, with deep expertise in optoelectronics and high-reliability interface components.

The ASSR-32xx series was designed specifically for replacing electromechanical relays in industrial, medical, and telecom equipment - emphasizing long-term reliability, safety certification, and seamless integration into legacy DIP-based designs.

FAQ

What is the maximum continuous output voltage rating for ASSR-3220-302E?

The ASSR-3220-302E has a maximum continuous output withstand voltage of 250 V across each channel's output terminals (pins 5–6 and 7–8). This rating applies under recommended operating conditions (–40°C to +85°C) and is validated per the datasheet's Output Withstand Voltage specification (|V_O(OFF)| = 250 V min.). Exceeding this voltage risks irreversible breakdown of the internal MOSFETs. The ASSR-3220-302E must be used with external overvoltage protection in applications exposed to transients above this level.

Can ASSR-3220-302E switch AC and DC loads simultaneously on different channels?

Yes - the ASSR-3220-302E supports independent AC or DC switching on each channel. Channel 1 (pins 5–6) and Channel 2 (pins 7–8) are fully isolated from each other and from the input side. Each channel handles bidirectional loads up to 250 V peak and 0.2 A average, making it possible to drive a 24 V DC solenoid on one channel and a 120 V AC lamp on the other without interference. The ASSR-3220-302E datasheet confirms this capability in the Applications and Schematic sections.

What is the minimum input current required to reliably turn on ASSR-3220-302E across its full temperature range?

The ASSR-3220-302E requires a minimum input current of 3 mA through either LED channel (pins 1–2 or 3–4) to guarantee turn-on across the full operating temperature range (–40°C to +85°C). While the device may activate at lower currents (e.g., ≥0.5 mA), Broadcom specifies 3 mA as the design threshold for robust performance over temperature and lifetime. The ASSR-3220-302E achieves this with typical forward voltage of 1.3 V at 5 mA, enabling direct drive from most 3.3 V or 5 V microcontrollers.

Does ASSR-3220-302E require an external turn-off circuit or snubber network?

No - the ASSR-3220-302E incorporates an integrated turn-off circuit that actively discharges the photovoltaic gate drive when input current drops below ~0.5 mA. This ensures clean, rapid channel deactivation (typical T_OFF = 0.02 ms) without external components. Unlike basic optocouplers, the ASSR-3220-302E does not rely on passive gate discharge; its internal circuitry guarantees defined off-state behavior even with inductive loads. No snubber is needed for standard 250 V/0.2 A switching.

Is ASSR-3220-302E compliant with RoHS and lead-free soldering standards?

Yes - the ASSR-3220-302E is RoHS compliant and qualified for lead-free reflow soldering per the JEDEC J-STD-020 profile, with a peak temperature of 260°C for 10 seconds. Its gull-wing surface-mount package (Option 302E) is explicitly designed for compatibility with standard Pb-free assembly processes, including preheat, soak, ramp-up, and cooling phases outlined in the Broadcom AV02-0260EN datasheet. The ASSR-3220-302E carries the "LEAD FREE" marking per package outline drawings.

ASSR-3220-302E Specifications

Product attributes: Attribute value

Manufacturer:: Broadcom Limited

Series:: ASSR

Packaging:: Tube

Product Status:: Obsolete

Mounting Type:: Surface Mount

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:: Gull Wing

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 8-DIP Gull Wing

Approval Agency:: CSA, UL

Grade:: -

Qualification:: -

ASSR-3220-302E FAQ

1.How can I place an order for ASSR-3220-302E through Aetrix?

Please submit a Request for Quotation (RFQ) for ASSR-3220-302E 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-3220-302E reliable?

The price and inventory of ASSR-3220-302E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-3220-302E is usually 5 days.

3.What payment methods are accepted for ASSR-3220-302E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-3220-302E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ASSR-3220-302E?

ASSR-3220-302E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ASSR-3220-302E 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-3220-302E?

For technical support, including ASSR-3220-302E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-3220-302E requirements.

6.How does Aetrix verify that ASSR-3220-302E is sourced from the original manufacturer or authorized distributors?

All ASSR-3220-302E 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-3220-302E meets industry standards.

7.What is the process for return or replacement of ASSR-3220-302E?

All ASSR-3220-302E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-3220-302E, 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-3220-302E part is unused and in its original packaging.

Return procedure for ASSR-3220-302E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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