Broadcom Limited ASSR-1219-501E

Overview

ASSR-1219-501E from Broadcom is a single-channel, normally-off, solid-state relay (Photo MOSFET) in a 300-mil DIP-6 gull wing surface mount package. It features 60 V output withstand voltage, 0.2 A / 0.4 A dual-mode output current rating (AC/DC or DC-only), and low on-resistance of 1 Ω typical (AC/DC) or 0.25 Ω typical (DC-only), enabling reliable signal switching in telecom and industrial control interfaces.

For engineers reviewing the ASSR-1219-501E datasheet, pinout, applications, or equivalent options, this device serves as a UL-recognized, optically isolated SPST switch with CMOS-compatible input drive (3 mA turn-on threshold), high-voltage isolation (3750 Vrms), and dual-output connection flexibility for AC/DC or DC-only loads.

Technical Context

The ASSR-1219-501E integrates an AlGaAs infrared LED optically coupled to a photovoltaic diode array and driver circuit that controls two discrete high-voltage MOSFETs. Its output stage supports bidirectional conduction and operates as a Form A (SPST-NO) relay with galvanic isolation between input and output sides.

It delivers 3750 Vrms input-to-output isolation per UL1577, achieves turn-on at ≥3 mA LED current, and turns off when input voltage drops to ≤0.8 V. The device supports both AC/DC and DC-only output configurations, with R(ON) and IO ratings varying per connection mode-enabling design flexibility without hardware change.

Key Specifications

Pinout & Package

ASSR-1219-501E uses a 300-mil DIP-6 gull wing surface mount package (JEDEC MS-018 variant). Package dimensions: 9.65 mm × 6.35 mm × 3.56 mm (L×W×H), with 2.54 mm lead pitch and 12° gull wing lead angle.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solid-state relay applications.

Compared with TLP3548A and VO3120, the ASSR-1219-501E uniquely combines AC/DC configurability, sub-0.15 ms switching, and ultra-low R(ON) in DC mode-making it optimal for space-constrained industrial and telecom designs requiring flexible, efficient, and safety-certified signal switching.

Availability

ASSR-1219-501E is available at Aetrix Electronics and suitable for telecommunications switching, industrial PLC I/O modules, and medical patient monitoring systems requiring stable component supply, RoHS compliance, and long-lifecycle support.

Supply support for ASSR-1219-501E 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. is a global semiconductor leader designing high-performance connectivity, infrastructure, and optoelectronic components for data center, enterprise, and industrial applications.

The ASSR-12XX series was developed as a family of safety-certified, compact solid-state relays targeting EMR replacement in space- and reliability-constrained systems where mechanical wear, EMI, and isolation integrity are critical concerns.

FAQ

What is the maximum output voltage the ASSR-1219-501E can safely block?

The ASSR-1219-501E has a rated output withstand voltage of 60 V, meaning it can reliably block up to ±60 V across its output terminals under steady-state conditions. This rating applies to both AC and DC configurations, and the device must be used within this limit to avoid breakdown-transient overvoltage protection is recommended in noisy environments. The ASSR-1219-501E datasheet specifies |VO(OFF)| = 60 V min at VF = 0.8 V and IO = 250 μA.

How does the ASSR-1219-501E achieve DC-only versus AC/DC output operation?

The ASSR-1219-501E supports two distinct output wiring modes defined in its schematics: Connection A (AC/DC) uses pins 4 and 6 as source/drain with pin 5 open, yielding 0.2 A/1 Ω; Connection B (DC-only) ties pin 5 to one side of the load, enabling parallel MOSFET conduction and delivering 0.4 A/0.25 Ω. This dual-mode capability is intrinsic to the ASSR-1219-501E's internal topology and requires no external component changes-only PCB trace routing.

Is the ASSR-1219-501E compatible with standard 250 °C reflow profiles?

Yes, the ASSR-1219-501E is qualified for lead-free reflow per JEDEC J-STD-020, with a peak temperature of 260 °C for 10 seconds. Its gull wing leads and thermally robust epoxy body ensure reliable solder joint formation using standard profile settings-no special preheat or cooling ramp adjustments are required. The ASSR-1219-501E's packaging and materials have been validated for compatibility with industry-standard SMT assembly lines.

Does the ASSR-1219-501E require an external gate resistor or snubber network?

No, the ASSR-1219-501E integrates all necessary driver circuitry and photovoltaic bias generation internally-no external gate resistors, snubbers, or flyback diodes are needed. Its output stage is self-contained and optimized for clean switching into resistive and moderately inductive loads. This simplifies design and reduces bill-of-materials cost compared to discrete MOSFET+optocoupler solutions. The ASSR-1219-501E's internal architecture eliminates external passive dependencies.

What safety certifications apply to the ASSR-1219-501E?

The ASSR-1219-501E is UL Recognized per UL 1577 (3750 Vrms for 1 minute) and approved under CSA Component Acceptance Notice #5. It meets minimum creepage (7.4 mm) and clearance (7.1 mm) requirements for reinforced insulation, and carries a CTI rating of 175 V and DIN VDE 0109 Insulation Group IIIa. These certifications are explicitly documented for the ASSR-1219-501E in Broadcom AV02-0173EN and apply to its full operating temperature range.