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Broadcom Limited ASSR-301C-503E
- Part No.:
- ASSR-301C-503E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 4-SOP (0.173", 4.40mm)
- Datasheet:
-
ASSR-301C-503E.pdf
- Description:
- SSR RELAY SPST-NO 50MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:4,389
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Product details
Overview
ASSR-301C-503E from Broadcom (formerly Avago) is a single-channel, normally-off, solid-state SPST relay in a 4-pin SO surface-mount package, featuring 250V output withstand voltage, 0.05A current rating, 34Ω typical on-resistance, 0.07ms turn-on/turn-off time, and 3750 Vrms input-output isolation - deployed in automatic test equipment for high-speed signal switching.
For engineers reviewing the ASSR-301C-503E datasheet, pinout, applications, or equivalent options, key selection criteria include low C×R (340 pF·Ω), sub-1μA off-state leakage, RoHS-compliant lead-free construction, SO-4 thermal and layout compatibility, and UL/CSA safety recognition for industrial signal isolation.
Technical Context
The ASSR-301C-503E integrates an AlGaAs infrared LED optically coupled to a photovoltaic diode array and MOSFET driver, enabling galvanic isolation with no mechanical contacts. It operates as a bidirectional, zero-crossing–independent switch with 1mA minimum input current for turn-on and ≤0.8V input voltage for turn-off.
Its 250V output withstand voltage, 34Ω typical R(ON), and 0.3nA typical off-state leakage support precision analog and digital signal routing in multiplexed data acquisition systems where EMR replacement demands low charge injection and long-term reliability without contact wear.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 250 V - supports safe switching of signals up to ±250V in test instrumentation and data loggers |
| On-Resistance (RON) | 34 Ω typical - ensures minimal voltage drop and power loss at 50 mA load current |
| Turn-On/Off Time | 0.07 ms typical - enables >10 kHz switching rates in automated test sequencing |
| Input-Output Isolation | 3750 Vrms - meets UL1577 and CSA Component Acceptance for reinforced insulation |
| Off-State Leakage | 0.3 nA typical - preserves signal integrity in high-impedance measurement paths |
| C × R Product | 340 pF·Ω typical - minimizes transient coupling and improves settling behavior in fast-switching muxes |
| Package | SO-4 surface mount - compatible with standard SMT reflow profiles and 0.100" pitch PCB layouts |
Pinout & Package
ASSR-301C-503E uses a 4-pin Small Outline (SO-4) package with gull-wing leads, 7.62 mm body width, and 2.54 mm lead pitch. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Source, Pin 4 = Drain.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | LED input anode - requires ≥1 mA forward current to activate relay |
| Pin 2 | Cathode | LED input cathode - referenced to control logic ground |
| Pin 3 | Source | MOSFET source terminal - connects to low-side signal path or ground reference |
| Pin 4 | Drain | MOSFET drain terminal - carries bidirectional load current up to 50 mA |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional signal switching | Enables AC/DC signal routing without polarity constraints in multiplexer front-ends |
| Low C × R product | 340 pF·Ω limits capacitive feedthrough and improves channel-to-channel crosstalk suppression |
| High transient immunity | ≥1 kV/μs dV/dt rejection prevents false triggering in noisy industrial environments |
| RoHS-compliant lead-free | Meets EU Directive 2011/65/EU with -503E suffix; qualified for Pb-free reflow per J-STD-020 |
| UL/CSA safety certified | 3750 Vrms isolation rated per UL1577 and CSA Component Acceptance Notice #5 |
Applications
| Automatic Test Equipment (ATE) | Data Acquisition Systems |
|---|---|
Use Scenario: High-speed channel selection in semiconductor test handlers requiring >10,000 cycles per second switching. IC Role / Device Role / Timing Role: Solid-state SPST relay providing isolated, low-charge-injection signal path control between DUT and measurement instruments. Use Value: 0.07ms switching speed and 0.3nA leakage enable accurate parametric testing of low-current devices without contamination. | Use Scenario: Multiplexing analog sensor inputs (thermocouples, strain gauges) into a shared ADC channel. IC Role / Device Role / Timing Role: Bidirectional analog switch isolating input channels while preserving signal fidelity and common-mode range. Use Value: 250V withstand voltage and 34Ω RON allow direct connection to ±10V sensor outputs with <0.1% gain error. |
| Dataloggers & Recorders | EMR/Reed Relay Replacement |
Use Scenario: Long-duration environmental monitoring using battery-powered units requiring ultra-low standby power. IC Role / Device Role / Timing Role: Low-leakage signal gate controlling sensor excitation and readout timing in sleep/wake cycles. Use Value: 0.3nA off-state leakage extends battery life by minimizing quiescent current draw over years of operation. | Use Scenario: Upgrading legacy test fixtures from electromechanical relays to eliminate contact bounce, wear, and EMI. IC Role / Device Role / Timing Role: Drop-in replacement for Form A SPST relays with identical 4-pin SO footprint and logic-level drive. Use Value: 100M+ cycle lifetime and 1mA LED drive reduce maintenance and improve system uptime versus mechanical alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP3554(F) | Higher 400V output rating; 0.15A current rating; 5-pin SO6 package; 0.2ms TON/TOFF | Supports higher-voltage industrial I/O modules but requires PCB redesign due to different pin count and layout | Choose when >250V isolation or >50mA load current is required; not pin-compatible with ASSR-301C-503E |
| PVG612 | 100V output rating; 0.12A current rating; 4-pin SO package; 0.1ms TON; 1.5nA leakage | Better suited for low-voltage, high-current digital I/O; lower isolation voltage limits use in high-voltage test systems | Consider for cost-sensitive, low-voltage applications where 250V withstand is unnecessary |
Compared with TLP3554(F) and PVG612, the ASSR-301C-503E delivers optimal balance of 250V isolation, 0.05A rating, 0.07ms speed, and SO-4 footprint - making it the preferred choice for ATE and precision data acquisition where space, leakage, and switching fidelity are critical.
Availability
ASSR-301C-503E is available at Aetrix Electronics and suitable for automatic test equipment, data acquisition systems, dataloggers, and EMR replacement applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for ASSR-301C-503E 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. (formerly Avago Technologies) is a global semiconductor leader specializing in optical, wireless, and wired connectivity solutions, with deep expertise in optoelectronics and isolation technologies.
The ASSR-301C series belongs to Broadcom's high-speed solid-state relay product line, engineered specifically for replacing electromechanical relays in test and measurement systems where reliability, speed, and signal integrity are paramount.
FAQ
What is the maximum continuous output voltage rating for ASSR-301C-503E?
The ASSR-301C-503E has a maximum continuous output withstand voltage of 250 V, verified per its DC electrical specifications at TA = 25°C with VF = 0.8 V and IO = 250 μA. This rating applies to both polarities and supports bidirectional signal switching in precision test equipment where the ASSR-301C-503E is commonly deployed.
Does ASSR-301C-503E require external biasing or gate drive circuitry?
No, the ASSR-301C-503E is fully self-contained: its integrated photovoltaic diode array generates sufficient gate voltage to fully enhance the internal MOSFETs. Only 1 mA of forward LED current (IF) is needed to achieve reliable turn-on, and no external gate resistors, pull-downs, or drivers are required - simplifying design around the ASSR-301C-503E in compact ATE modules.
Is ASSR-301C-503E compatible with standard Pb-free reflow profiles?
Yes, ASSR-301C-503E is qualified for lead-free soldering per J-STD-020, with a peak reflow temperature of 260°C (±5°C) for ≤10 seconds. Its SO-4 gull-wing package is designed for compatibility with standard IR reflow profiles, including ramp-up ≤3°C/sec, preheat 150–200°C, and 20–40 sec dwell above 217°C - ensuring robust assembly for the ASSR-301C-503E in high-volume manufacturing.
How does the C × R value of ASSR-301C-503E impact multiplexer performance?
The ASSR-301C-503E's typical C × R value of 340 pF·Ω directly limits capacitive feedthrough and transient coupling during channel switching. In multiplexer designs, this low value reduces settling time and crosstalk between adjacent channels - a critical advantage for the ASSR-301C-503E in high-density, high-speed data acquisition systems where signal fidelity must be preserved across 100+ channels.
What safety certifications apply to ASSR-301C-503E?
The ASSR-301C-503E is UL Recognized per UL 1577 (3750 Vrms for 1 minute) and approved under CSA Component Acceptance Notice #5. These certifications validate its input-output insulation integrity for use in safety-critical industrial and test equipment - confirming that the ASSR-301C-503E meets recognized standards for reinforced isolation without requiring additional system-level certification effort.
ASSR-301C-503E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- ASSR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 250 V
- Load Current:
- 50 mA
- On-State Resistance (Max):
- 50 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 4-SO
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-301C-503E FAQ
1.How can I place an order for ASSR-301C-503E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-301C-503E 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-301C-503E reliable?
The price and inventory of ASSR-301C-503E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-301C-503E is usually 5 days.
3.What payment methods are accepted for ASSR-301C-503E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-301C-503E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-301C-503E?
ASSR-301C-503E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-301C-503E 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-301C-503E?
For technical support, including ASSR-301C-503E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-301C-503E requirements.
6.How does Aetrix verify that ASSR-301C-503E is sourced from the original manufacturer or authorized distributors?
All ASSR-301C-503E 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-301C-503E meets industry standards.
7.What is the process for return or replacement of ASSR-301C-503E?
All ASSR-301C-503E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-301C-503E, 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-301C-503E part is unused and in its original packaging.
Return procedure for ASSR-301C-503E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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