My Inquiry
My Account
Broadcom Limited ASSR-4128-002E
- Part No.:
- ASSR-4128-002E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ASSR-4128-002E.pdf
- Description:
- SSR RELAY SPST-NO 100MA 0-400V
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ASSR-4128-002E from Broadcom is a dual-channel, normally-off, single-pole-single-throw (SPST) solid-state relay (Photo MOSFET) with 400 V output withstand voltage, 0.1 A average output current, and 25 Ω typical on-resistance at 5 mA input drive. It features optically isolated AlGaAs LED input stage coupled to two high-voltage MOSFETs, enabling EMR replacement in telecom switching and industrial control circuits.
For engineers reviewing the ASSR-4128-002E datasheet, pinout, applications, or equivalent options, key selection criteria include DIP-8 package compatibility, 3750 VRMS input-output isolation per UL1577, dual SPST Form A functionality, and RoHS-compliant tube packaging for manual assembly and prototyping.
Technical Context
The ASSR-4128-002E implements optical coupling between an AlGaAs infrared LED and a photovoltaic diode array driving two discrete high-voltage MOSFETs. Its dual-channel architecture supports independent control of two isolated loads with identical turn-on threshold (≥3 mA LED current) and turn-off condition (≤0.8 V forward voltage).
It delivers 400 V output withstand voltage under DC/AC conditions, achieves 0.7 ms typical turn-on time and 40 μs typical turn-off time at 100 mA load, and maintains 10¹² Ω input-output resistance with only 0.8 pF inter-terminal capacitance - critical for noise-sensitive signal switching in medical and security systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual SPST (Form A), independent channels - enables two separate load switches in one DIP-8 package |
| Output Withstand Voltage | 400 V - supports AC/DC line-level isolation without external snubbers in telecom interfaces |
| Average Output Current | 0.1 A at TA = 25°C - sufficient for driving solenoids, LEDs, and logic-level control signals |
| On-Resistance (RON) | 25 Ω typical - minimizes I²R loss and self-heating during continuous DC operation |
| Input-Output Isolation | 3750 VRMS for 1 minute per UL1577 - meets reinforced insulation requirements for Class I equipment |
| Turn-On / Turn-Off Time | 0.7 ms / 0.04 ms - enables fast digital control response in data comms and automated test equipment |
| Input Drive Threshold | 3 mA minimum LED current - ensures reliable activation from CMOS/TTL logic without buffer stages |
Pinout & Package
ASSR-4128-002E uses a 300-mil DIP-8 through-hole package with gull-wing leads compatible with standard DIP-8 footprints. Pin 1 is marked by dot; pins 1–4 form the input LED side (anode/cathode pairs), and pins 5–8 serve as output terminals (two independent SPST switches).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | LED Anode / Cathode (Channel A) | Optical input for first relay channel; requires ≥3 mA forward current to close output |
| 3, 4 | LED Anode / Cathode (Channel B) | Independent optical input for second relay channel; electrically isolated from Channel A |
| 5, 6 | Output Drain / Source (Channel A) | High-voltage SPST switch node; rated 400 V, 0.1 A; bidirectional conduction capability |
| 7, 8 | Output Drain / Source (Channel B) | Second isolated SPST switch node; identical specs to pins 5–6; no shared internal connection |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel SPST isolation | Two independent Form A relays in one DIP-8 package - reduces board space vs discrete EMRs or dual optocouplers |
| Low drive requirement | 3 mA LED current enables direct interface with microcontroller GPIOs without driver transistors |
| High-speed switching | Sub-millisecond turn-on and 40 μs turn-off support burst-mode signaling and real-time control loops |
| Reinforced safety isolation | 3750 VRMS UL1577 rating and IIIa insulation group - certified for use in medical and industrial mains-connected systems |
| Bidirectional output conduction | Supports AC and DC loads without polarity constraints - simplifies design in mixed-signal instrumentation |
Applications
| Telecom Line Switching | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Routing analog voice or DSL signals between line cards while maintaining galvanic isolation from central office power. IC Role / Device Role / Timing Role: Dual SPST solid-state relay providing contact closure simulation with zero bounce and no mechanical wear. Use Value: Eliminates relay chatter and contact oxidation issues in 24/7 telecom infrastructure; 400 V rating handles ring voltage transients. |
Use Scenario: Isolating field-side sensor inputs and actuator outputs from controller logic in factory automation cabinets. IC Role / Device Role / Timing Role: Two independent optically isolated switches handling 24 V DC solenoid and indicator loads. Use Value: Replaces two electromechanical relays with one component, reducing PCB area by >40% and improving MTBF beyond 10⁷ cycles. |
| Medical Diagnostic Equipment | Security System Control Panels |
Use Scenario: Safely routing patient-connected ECG or EEG signals to multiple monitoring paths without leakage current risk. IC Role / Device Role / Timing Role: Reinforced-isolation SPST switch ensuring <10 μA patient leakage per IEC 60601-1. Use Value: Meets creepage (7.4 mm) and clearance (7.1 mm) requirements for BF-rated medical devices without additional spacing. |
Use Scenario: Controlling siren, strobe, and door lock actuators from low-voltage microcontroller outputs in intrusion alarm panels. IC Role / Device Role / Timing Role: Dual-channel load switch enabling simultaneous or sequenced activation of security peripherals. Use Value: 0.1 A rating supports common 12 V/24 V alarm loads; RoHS compliance satisfies global regulatory submissions. |
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 | Dual-channel, 600 V rating, 0.12 A, SOIC-8 package - higher voltage but surface-mount only | Requires reflow-compatible layout; lacks DIP-8 through-hole option for legacy prototyping | Preferred when higher voltage margin or automated assembly is required; not drop-in for ASSR-4128-002E DIP-8 footprint |
| Vishay VO3120 | Single-channel, 400 V, 0.1 A, DIP-6 - same voltage/current but half the channel count | Requires two units to match ASSR-4128-002E's dual functionality; increases board area and BOM count | Applicable where channel independence is unnecessary or cost-per-channel is prioritized over integration |
Compared with TLP3558A and VO3120, ASSR-4128-002E uniquely combines DIP-8 through-hole mounting, dual SPST functionality, and UL1577-certified 3750 VRMS isolation - making it optimal for manual assembly, space-constrained industrial controls, and safety-critical replacements of electromechanical relays.
Availability
ASSR-4128-002E is available at Aetrix Electronics and suitable for telecom switching, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for ASSR-4128-002E 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 Inc. designs high-performance semiconductor solutions for networking, storage, industrial, and communications infrastructure.
The ASSR-41xx series targets electromechanical relay replacement in safety-isolated signal path applications - emphasizing reliability, compact size, and regulatory compliance for telecom, medical, and industrial end equipment.
FAQ
What is the maximum ambient temperature for continuous operation of ASSR-4128-002E?
The ASSR-4128-002E is rated for continuous operation from –40°C to +85°C ambient temperature. Derating curves in the datasheet show that at 85°C, the maximum average output current drops to approximately 0.06 A to maintain junction temperature below 125°C. This thermal limit applies to both channels simultaneously in the ASSR-4128-002E.
Does ASSR-4128-002E support AC load switching?
Yes, ASSR-4128-002E supports bidirectional AC load switching up to 400 V peak due to its MOSFET-based output stage. Unlike triac-based SSRs, it does not require zero-crossing detection and can switch at any point in the AC cycle - making it suitable for phase-control and fast-response applications. The ASSR-4128-002E datasheet confirms AC/DC compatibility in its output specifications.
What is the input-to-output capacitance of ASSR-4128-002E, and why does it matter?
The ASSR-4128-002E has a measured input-output capacitance of 0.8 pF at 1 MHz. This ultra-low value minimizes capacitive coupling noise between input control lines and high-voltage output circuits - critical in sensitive analog measurement systems and high-speed digital isolation where signal integrity must be preserved. This parameter is explicitly specified for ASSR-4128-002E in the Broadcom AV02-0218EN datasheet.
Can ASSR-4128-002E replace two separate ASSR-4118 devices?
Yes, ASSR-4128-002E provides functionally equivalent performance to two ASSR-4118 units - each channel matches the 400 V, 0.1 A, 25 Ω RON specification of ASSR-4118 - but integrates them into a single DIP-8 package. Pin compatibility differs: ASSR-4118 uses SO-4 or DIP-4, while ASSR-4128-002E uses DIP-8 with dedicated pins per channel. Layout redesign is required, but system-level BOM count and footprint are reduced.
Is ASSR-4128-002E certified for medical equipment use?
ASSR-4128-002E carries UL1577 recognition (3750 VRMS, 1 min) and CSA Component Acceptance Notice #5, with documented creepage (7.4 mm) and clearance (7.1 mm) meeting IEC 60601-1 requirements for BF-rated medical devices. While final system certification remains the OEM's responsibility, the ASSR-4128-002E's insulation parameters and tracking index (CTI = 175 V) are validated for medical isolation applications per Broadcom's AV02-0218EN datasheet.
ASSR-4128-002E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- ASSR
- Packaging:
- Tube
- Product Status:
- Active
- Mounting Type:
- Through Hole
- Circuit:
- SPST-NO (1 Form A) x 2
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 400 V
- Load Current:
- 100 mA
- On-State Resistance (Max):
- 35 Ohms
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DIP
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-4128-002E FAQ
1.How can I place an order for ASSR-4128-002E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-4128-002E 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-4128-002E reliable?
The price and inventory of ASSR-4128-002E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-4128-002E is usually 5 days.
3.What payment methods are accepted for ASSR-4128-002E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-4128-002E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-4128-002E?
ASSR-4128-002E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-4128-002E 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-4128-002E?
For technical support, including ASSR-4128-002E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-4128-002E requirements.
6.How does Aetrix verify that ASSR-4128-002E is sourced from the original manufacturer or authorized distributors?
All ASSR-4128-002E 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-4128-002E meets industry standards.
7.What is the process for return or replacement of ASSR-4128-002E?
All ASSR-4128-002E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-4128-002E, 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-4128-002E part is unused and in its original packaging.
Return procedure for ASSR-4128-002E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ASSR-4128-002E Tags
.jpg)
-
G3VM-21UR11(TR05)
Omron Electronics Inc-EMC Div
-
G3VM-61VY3(TR05)
Omron Electronics Inc-EMC Div
-
CPC1017NTR
Littelfuse Inc.
-
CPC1017N
Littelfuse Inc.
-
CPC1006N
Littelfuse Inc.
-
VO1400AEFTR
Vishay Semiconductor Opto Division
-
CPC1006NTR
Littelfuse Inc.
-
TLP175A(TPL,E
Toshiba Semiconductor and Storage
-
CPC1002NTR
Littelfuse Inc.
-
AQY280S
Panasonic Electric Works
-
CPC1117NTR
Littelfuse Inc.
-
CPC1106NTR
Littelfuse Inc.
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
