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Broadcom Limited ASSR-302C-302E
- Part No.:
- ASSR-302C-302E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SMD (0.300", 7.62mm)
- Datasheet:
-
ASSR-302C-302E.pdf
- Description:
- SSR RELAY SPST-NO 50MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:1,576
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Product details
Overview
ASSR-302C-302E from Broadcom (formerly Avago) is a dual-channel, normally-off, solid-state SPST relay in an 8-pin DIP gull-wing surface-mount package. It delivers 250V output withstand voltage, 0.05A current rating, 34Ω typical on-resistance, 0.07ms turn-on/turn-off time, and 0.3nA typical off-state leakage - enabling high-accuracy signal switching in automated test equipment.
For engineers reviewing the ASSR-302C-302E datasheet, pinout, applications, or equivalent options, key selection criteria include input LED drive threshold (1mA), bi-directional signal capability, low C×R (340pF·Ω), high transient immunity (>1kV/μs), and UL/CSA safety certification for isolation-critical systems.
Technical Context
The ASSR-302C-302E integrates two independent optically isolated channels, each comprising an AlGaAs LED input stage coupled to a photovoltaic diode array and MOSFET driver circuit. Each channel operates as a Form A (normally open) bi-directional switch with no polarity dependence on the output side.
It achieves galvanic isolation via internal dielectric barrier rated at 3750 Vrms for 1 minute (UL1577), with minimum creepage (7.4 mm) and clearance (7.1 mm) between input and output terminals. Input-to-output capacitance is 0.8 pF typical, supporting minimal signal coupling in high-speed multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 250 V - supports safe switching of signals up to ±250V without breakdown |
| On-Resistance (RON) | 34 Ω typical - ensures minimal voltage drop and power loss at 50 mA load |
| Turn-On / Turn-Off Time | 0.07 ms typical - enables sub-100 μs channel switching for high-throughput test sequencing |
| Input LED Forward Current (IF(ON)) | 1 mA min - allows direct drive from low-power logic or microcontroller GPIO |
| Off-State Leakage Current | 0.3 nA typical - preserves signal integrity in high-impedance measurement paths |
| C × R Product | 340 pF·Ω typical - minimizes settling error and crosstalk in precision analog switching |
| Isolation Voltage | 3750 Vrms - meets UL1577 and CSA Component Acceptance for reinforced insulation |
Pinout & Package
ASSR-302C-302E uses an 8-pin DIP gull-wing surface-mount package (300-mil width), with pins 1–4 forming one isolated channel (input + output pair) and pins 5–8 forming the second identical channel. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Output 1, Pin 4 = Output 2; Pin 5 = Anode, Pin 6 = Cathode, Pin 7 = Output 1, Pin 8 = Output 2 - per functional diagram and package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Anode (LED input) | Positive terminal for infrared LED drive; requires ≥1 mA forward current to activate channel |
| 2, 6 | Cathode (LED input) | Return path for LED current; referenced to input ground |
| 3, 4, 7, 8 | Output terminals (SPST) | Bi-directional, polarity-insensitive switch contacts; pins 3–4 and 7–8 are electrically isolated pairs |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel Form A relay | Replaces two electromechanical relays with single IC - saves PCB area and eliminates bounce, wear, and EMI |
| Low C × R (340 pF·Ω) | Reduces charge injection and settling time in multiplexer-based data acquisition systems |
| 0.3 nA off-state leakage | Enables accurate DC-coupled measurements in high-impedance sensor front-ends and voltmeters |
| 3750 Vrms isolation | Supports safe operation across safety barriers in medical, industrial, and test instrumentation |
| Gull-wing SMT package | Enables automated assembly and reliable reflow soldering per JEDEC J-STD-020 profile |
Applications
| Automatic Test Equipment (ATE) | Data Acquisition System |
|---|---|
Use Scenario: High-speed channel routing of DUT signals during parametric testing. IC Role / Device Role / Timing Role: Bi-directional SPST switch controlling signal path between tester resources and device under test. Use Value: 0.07ms switching speed and 0.3nA leakage enable >10 kHz test sequencing with sub-nA measurement accuracy. | Use Scenario: Multiplexing analog sensor outputs into a shared ADC channel. IC Role / Device Role / Timing Role: Low-leakage, low-charge-injection analog switch isolating sensor nodes from common bus. Use Value: 340 pF·Ω C×R and 34Ω RON minimize gain error and settling delay in 16-bit+ systems. |
| Multiplexer | Measuring Instrument |
Use Scenario: Building scalable analog matrix switches for modular instrumentation racks. IC Role / Device Role / Timing Role: Dual-channel solid-state relay providing isolated, non-latching signal routing. Use Value: Dual 250V channels allow independent control of high-voltage and low-voltage signal domains in same footprint. | Use Scenario: Precision voltage/current sourcing and sensing in benchtop multimeters. IC Role / Device Role / Timing Role: Isolated, low-noise switch enabling guarded measurements and range switching. Use Value: 3750 Vrms isolation and <1 µV offset support Class I safety compliance and metrology-grade accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP3558A | Single-channel, 400V rating, 0.25A current, SO-6 package; higher RON (120Ω typical) | Higher voltage/current handling but slower switching (0.2ms TON) and no dual-channel integration | Choose when higher output voltage margin is required and board space permits discrete channel layout |
| PS8501-AX | Dual-channel, 400V rating, 0.1A current, SSOP-8 package; 1.5pF CI-O, 10nA leakage | Higher isolation capacitance and leakage limit use in ultra-high-impedance or RF-sensitive designs | Prefer for 400V systems where leakage tolerance >10nA is acceptable and SSOP-8 footprint fits layout |
Compared with TLP3558A and PS8501-AX, the ASSR-302C-302E offers superior low-leakage performance (0.3nA), faster switching (0.07ms), and lower C×R - making it optimal for high-precision, high-speed ATE and data acquisition where signal fidelity and timing resolution are critical.
Availability
ASSR-302C-302E is available at Aetrix Electronics and suitable for automatic test equipment, data acquisition systems, and measuring instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for ASSR-302C-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 Inc. (formerly Avago Technologies) is a global semiconductor leader specializing in infrastructure software, networking, and optoelectronics solutions.
The ASSR-302C-302E belongs to Broadcom's ASSR-30x series of solid-state relays, engineered specifically for fast, low-error signal switching in test and measurement systems where reliability, isolation, and precision outweigh mechanical relay limitations.
FAQ
What is the maximum operating temperature for the ASSR-302C-302E?
The ASSR-302C-302E is specified to operate continuously over an ambient temperature range of –40°C to +85°C. Its junction temperature must not exceed 125°C under any condition. Derating of output current may be required above 70°C ambient to maintain thermal stability. The ASSR-302C-302E datasheet defines all electrical parameters within this full industrial temperature range.
Does the ASSR-302C-302E support bi-directional signal switching?
Yes, the ASSR-302C-302E supports true bi-directional analog signal switching on both channels. Its output terminals have no polarity requirement - signals can flow equally well from pin 3 to pin 4 or pin 4 to pin 3. This is enabled by the back-to-back MOSFET configuration inside each channel, making the ASSR-302C-302E ideal for AC-coupled and differential measurement paths.
What is the minimum input current required to turn on the ASSR-302C-302E?
The ASSR-302C-302E turns on reliably with a minimum input LED forward current of 1 mA at TA = 25°C. For guaranteed operation across the full –40°C to +85°C range, Broadcom recommends using 5 mA. The ASSR-302C-302E maintains consistent switching performance without external biasing, simplifying interface design with microcontrollers or logic drivers.
Is the ASSR-302C-302E certified for safety isolation standards?
Yes, the ASSR-302C-302E is UL Recognized per UL 1577 (3750 Vrms for 1 minute) and approved under CSA Component Acceptance Notice #5. It meets reinforced insulation requirements with 7.4 mm creepage and 7.1 mm clearance. These certifications apply directly to the ASSR-302C-302E in its specified DIP-8 gull-wing package and are documented in the official Broadcom safety report.
Can the ASSR-302C-302E replace electromechanical relays in existing designs?
Yes, the ASSR-302C-302E is designed as a direct functional replacement for two Form A electromechanical relays - offering silent operation, infinite cycle life, no contact bounce, and faster switching. Its pin-compatible DIP-8 footprint matches standard EMR sockets, and the ASSR-302C-302E requires only 1 mA LED drive versus typical 10–50 mA coil currents, reducing system power demand significantly.
ASSR-302C-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:
- 50 mA
- On-State Resistance (Max):
- 50 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-302C-302E FAQ
1.How can I place an order for ASSR-302C-302E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-302C-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-302C-302E reliable?
The price and inventory of ASSR-302C-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-302C-302E is usually 5 days.
3.What payment methods are accepted for ASSR-302C-302E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-302C-302E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-302C-302E?
ASSR-302C-302E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-302C-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-302C-302E?
For technical support, including ASSR-302C-302E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-302C-302E requirements.
6.How does Aetrix verify that ASSR-302C-302E is sourced from the original manufacturer or authorized distributors?
All ASSR-302C-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-302C-302E meets industry standards.
7.What is the process for return or replacement of ASSR-302C-302E?
All ASSR-302C-302E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-302C-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-302C-302E part is unused and in its original packaging.
Return procedure for ASSR-302C-302E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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