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Broadcom Limited ASSR-3211-001E
- Part No.:
- ASSR-3211-001E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 6-DIP (0.300", 7.62mm)
- Datasheet:
-
ASSR-3211-001E.pdf
- Description:
- SSR RELAY SPST-NO 200MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
ASSR-3211-001E from Broadcom is a single-channel, normally-off, solid-state SPST relay (Form A) based on photo-MOSFET technology, featuring 250 V output withstand voltage, 0.2 A AC/DC current rating, and 8 Ω typical on-resistance. It optically isolates input LED control (3 mA turn-on threshold) from high-voltage output switching and is used in telecom signal routing, industrial PLC I/O modules, and medical equipment safety isolation.
For engineers reviewing the ASSR-3211-001E datasheet, pinout, applications, or equivalent options, key selection criteria include its 3750 Vrms input-output isolation, 0.25 ms typical turn-on time, DC-only configuration enabling 0.4 A / 2.5 Ω operation, and 6-pin DIP through-hole package compatibility with legacy EMR footprints.
Technical Context
The ASSR-3211-001E integrates an AlGaAs infrared LED input stage optically coupled to a high-speed photovoltaic diode array and driver circuit that controls two discrete high-voltage MOSFETs. Its output stage supports both AC/DC and DC-only configurations, with R(ON) dropping from 8 Ω to 2.5 Ω and Io rising from 0.2 A to 0.4 A under DC-only connection (Connection B).
It delivers 3750 Vrms isolation per UL1577, 1 kV/μs transient immunity, and operates across –40°C to +85°C. Input logic is CMOS-compatible (IF = 3–20 mA), and turn-off occurs at VF ≤ 0.8 V - enabling direct microcontroller GPIO interfacing without external drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 250 V - maximum continuous voltage the output contacts can block without breakdown |
| Max Output Current (AC/DC) | 0.2 A - safe steady-state load current for general-purpose AC or DC switching |
| Max Output Current (DC-only) | 0.4 A - achievable only with Connection B wiring; enables higher-power DC loads |
| On-Resistance (AC/DC) | 8 Ω typical - determines I²R power loss and voltage drop at 0.2 A load |
| On-Resistance (DC-only) | 2.5 Ω typical - reduces conduction loss by >69% vs. AC/DC mode for DC loads |
| Turn-On Time | 0.25 ms typical - enables fast digital signal switching in data comms and test equipment |
| Input-Output Isolation | 3750 Vrms - meets UL1577 safety requirement for reinforced insulation in medical/industrial systems |
Pinout & Package
ASSR-3211-001E uses a 6-pin DIP (300-mil) through-hole package with standard dual-in-line footprint and 2.54 mm pin pitch. Pin 1 is marked with a dot; pins are arranged in two rows of three.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (LED input) | Positive terminal of infrared LED; connect to MCU GPIO or driver via current-limiting resistor |
| 2 | Cathode (LED input) | Ground return for LED; 3 mA minimum forward current required to activate relay |
| 3 | Source (MOSFET output) | Common source node for internal MOSFET pair; tied to load return in Connection A |
| 4 | Drain 1 (MOSFET output) | First output switch terminal; used with Pin 3 for SPST switching in AC/DC mode |
| 5 | Drain 2 (MOSFET output) | Second output switch terminal; used with Pin 3 for DC-only low-R(ON) configuration (Connection B) |
| 6 | Source (MOSFET output) | Redundant source connection; internally bonded to Pin 3 for enhanced current handling |
Key Features
| Feature | Design Value |
|---|---|
| CMOS-compatible input | 3 mA turn-on threshold enables direct drive from 3.3 V/5 V microcontrollers without buffer stages |
| Dual-mode output configuration | Supports AC/DC (Pins 3–4) or DC-only (Pins 3–5) wiring - selectable via PCB layout |
| High-speed switching | 0.25 ms turn-on / 0.02 ms turn-off allows >1 kHz switching frequency in signal routing applications |
| Reinforced safety isolation | 3750 Vrms UL1577 rating and 4.9 mm creepage/clearance support Class I/II medical and industrial safety compliance |
| Low leakage & offset | 0.3 nA max output leakage and 1 μV offset enable precision analog signal switching without loading or offset error |
Applications
| Telecom Signal Routing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Switching analog voice/data signals between line cards and test ports in access networks. IC Role / Device Role / Timing Role: Solid-state SPST relay providing galvanic isolation and contactless switching of ±12 V analog signals. Use Value: Eliminates mechanical wear and bounce of EMRs, enabling >10⁹ cycle lifetime and sub-millisecond reconfiguration. | Use Scenario: Isolating 24 V DC sensor inputs and 120 V AC actuator outputs in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Form A solid-state relay replacing electromechanical relays for field-side signal conditioning and safety separation. Use Value: 3750 Vrms isolation and 250 V withstand voltage meet IEC 61000-4-5 surge immunity and functional safety requirements. |
| Medical Diagnostic Equipment | Security System Control Panels |
Use Scenario: Routing patient-connected ECG/EEG sensor signals to ADC front-ends while maintaining patient isolation. IC Role / Device Role / Timing Role: Bidirectional analog switch with reinforced insulation barrier meeting IEC 60601-1 2× MOPP requirements. Use Value: 1 μV offset and <0.3 nA leakage preserve microvolt-level biopotential integrity without adding noise or DC error. | Use Scenario: Controlling siren, strobe, and door-lock actuators from low-voltage microcontroller in fire alarm panels. IC Role / Device Role / Timing Role: High-reliability SPST switch interfacing 3.3 V logic to 24 V DC or 120 V AC alarm loads. Use Value: 0.4 A DC-only capability drives solenoid locks directly; no external driver needed, reducing BOM count. |
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, 250 V/0.2 A, 10 Ω R(ON), 0.2 ms TON - slightly higher on-resistance and slower turn-off | Lacks DC-only configuration option; fixed 0.2 A rating regardless of wiring | Choose when UL1577 certification is not required and lower cost is prioritized over DC-current headroom |
| Vishay VO3120 | 8-pin DIP, 400 V/0.12 A, 16 Ω R(ON), 0.5 ms TON - higher voltage rating but lower current and slower switching | Designed for higher-voltage AC mains switching; unsuitable for low-R(ON) DC loads | Choose only for 240 V AC load isolation where 0.4 A DC capability is unnecessary |
Compared with TLP3558A and VO3120, the ASSR-3211-001E uniquely supports dual-mode output wiring to achieve 0.4 A/2.5 Ω performance - delivering 2× DC current capacity and 3× lower conduction loss than alternatives, critical for power-sensitive embedded control.
Availability
ASSR-3211-001E is available at Aetrix Electronics and suitable for telecom signal routing, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for ASSR-3211-001E 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 optocoupler and solid-state relay design.
The ASSR-32xx series was developed to replace electromechanical relays in high-reliability, high-cycle-count applications - targeting telecom, industrial automation, and medical systems needing silent, bounce-free, and maintenance-free switching.
FAQ
What is the recommended input drive circuit for ASSR-3211-001E?
The ASSR-3211-001E requires a minimum 3 mA forward current through Pins 1–2 to reliably turn on. A 3.3 V or 5 V MCU GPIO can drive it directly using a series resistor: for 3.3 V, use 680 Ω (ensuring ≥4.9 mA at VF = 1.3 V); for 5 V, use 1.0 kΩ. Always include a 0.1 µF bypass capacitor near the device to suppress transients. This ensures stable activation of the ASSR-3211-001E across temperature and supply variations.
Can ASSR-3211-001E switch AC and DC loads simultaneously?
No - the ASSR-3211-001E must be wired in either AC/DC mode (Pins 3–4) or DC-only mode (Pins 3–5). AC/DC mode supports bidirectional blocking up to ±250 V but limits current to 0.2 A and R(ON) to 8 Ω. DC-only mode enables unidirectional 0.4 A current and 2.5 Ω R(ON), but cannot block reverse voltage. The correct wiring is defined in the ASSR-3211-001E schematic; mixing modes risks overstress or failure.
What safety certifications does ASSR-3211-001E hold?
The ASSR-3211-001E is UL Recognized per UL1577 (3750 Vrms for 1 minute) and CSA Component Accepted (Notice #5). It provides 4.9 mm minimum creepage and clearance, CTI of 175 V, and IIIa insulation group rating - satisfying reinforced insulation requirements for medical (IEC 60601-1) and industrial (IEC 61000-4-5) end-equipment. These certifications apply specifically to the ASSR-3211-001E in its 6-pin DIP package as shipped.
How does temperature affect the output current rating of ASSR-3211-001E?
The ASSR-3211-001E's maximum average output current derates linearly above 25°C ambient: at 60°C, rated current drops to ~0.15 A (AC/DC mode); at 85°C, it falls to ~0.1 A. Derating follows Figure 1 in the datasheet. For DC-only mode, the 0.4 A rating applies only at TA ≤ 25°C and requires heatsinking or airflow above 40°C. Exceeding these limits risks thermal runaway and permanent damage to the ASSR-3211-001E MOSFET die.
Is ASSR-3211-001E compatible with lead-free reflow soldering?
Yes - the ASSR-3211-001E is RoHS-compliant and qualified for lead-free reflow per JEDEC J-STD-020. Peak temperature must not exceed 260°C for ≤10 seconds, with ramp rates ≤3°C/sec (preheat) and ≤6°C/sec (reflow). The device uses matte tin plating and passes the 260°C/10s test without delamination or parametric shift. Always follow the exact profile in AV02-0260EN Section 8 to ensure long-term reliability of the ASSR-3211-001E.
ASSR-3211-001E 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)
- 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:
- 6-DIP
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-3211-001E FAQ
1.How can I place an order for ASSR-3211-001E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-3211-001E 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-3211-001E reliable?
The price and inventory of ASSR-3211-001E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-3211-001E is usually 5 days.
3.What payment methods are accepted for ASSR-3211-001E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-3211-001E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-3211-001E?
ASSR-3211-001E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-3211-001E 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-3211-001E?
For technical support, including ASSR-3211-001E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-3211-001E requirements.
6.How does Aetrix verify that ASSR-3211-001E is sourced from the original manufacturer or authorized distributors?
All ASSR-3211-001E 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-3211-001E meets industry standards.
7.What is the process for return or replacement of ASSR-3211-001E?
All ASSR-3211-001E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-3211-001E, 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-3211-001E part is unused and in its original packaging.
Return procedure for ASSR-3211-001E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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