PAA132S Solid State Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The PAA132S is an IXYS OptoMOS® solid state relay (SSR) configured as a single-pole single-throw normally open (SPST-NO) device with dual channels in an 8-SMD surface mount package. This component is rated for 600 mA load current at 0–60 V DC/AC output with 1.2 VDC input trigger voltage and 1 Ohm maximum on-state resistance. The part is Active status, RoHS3 compliant, and carries unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching or exceeding electrical performance within the same package footprint and mounting technology, allowing for direct replacement in applications where load current and on-state resistance requirements are met.

Key Parameters

Parameter	Value
Manufacturer Part Number	PAA132S
Manufacturer	IXYS Integrated Circuits Division
Series	PAA, OptoMOS®
Circuit Configuration	SPST-NO (1 Form A) x 2
Output Type	AC, DC
Voltage - Input	1.2 VDC
Voltage - Load	0 V ~ 60 V
Load Current	600 mA
On-State Resistance (Max)	1 Ohm
Package / Case	8-SMD (0.300", 7.62mm)
Mounting Type	Surface Mount
Termination Style	Gull Wing
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PAA132S are qualified based on the following criteria:

Circuit Configuration: All substitutes maintain SPST-NO (1 Form A) x 2 dual-channel topology
Package Compatibility: All substitutes use 8-SMD (0.300", 7.62mm) surface mount package with gull wing termination
Load Voltage Range: All substitutes support 0 V ~ 60 V output voltage (AC and DC)
Load Current Capability: Substitutes are grouped by current rating: 200 mA, 600 mA, and 1 A ratings
On-State Resistance: Substitutes with equal or lower on-state resistance are electrically compatible
Input Voltage: Substitute input voltages (1.3 VDC) are within acceptable operating tolerance
Compliance & Status: All substitutes are Active status, RoHS3 compliant, and MSL 1 rated

The PAA132S (600 mA, 1 Ohm) can be directly replaced by ASSR-1420-302E (600 mA, 1 Ohm) for identical electrical performance. Higher-current alternatives (ASSR-1520-302E and ASSR-1520-502E at 1 A, 500 mOhm) provide superior load handling capability. Lower-current alternatives (ASSR-1228-302E and ASSR-1228-502E at 200 mA, 10 Ohm) are suitable only for applications with reduced current and resistance requirements.

Parameter Comparison

Parameter	PAA132S	ASSR-1228-302E	ASSR-1228-502E	ASSR-1420-302E	ASSR-1520-302E	ASSR-1520-502E
Manufacturer	IXYS	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Voltage - Input	1.2 VDC	1.3 VDC	1.3 VDC	1.3 VDC	1.3 VDC	1.3 VDC
Voltage - Load	0 V ~ 60 V	0 V ~ 60 V	0 V ~ 60 V	0 V ~ 60 V	0 V ~ 60 V	0 V ~ 60 V
Load Current	600 mA	200 mA	200 mA	600 mA	1 A	1 A
On-State Resistance (Max)	1 Ohm	10 Ohms	10 Ohms	1 Ohm	500 mOhms	500 mOhms
Circuit Configuration	SPST-NO (1 Form A) x 2	SPST-NO (1 Form A) x 2	SPST-NO (1 Form A) x 2	SPST-NO (1 Form A) x 2	SPST-NO (1 Form A) x 2	SPST-NO (1 Form A) x 2
Output Type	AC, DC	AC, DC	AC, DC	AC, DC	AC, DC	AC, DC
Package / Case	8-SMD (0.300", 7.62mm)	8-SMD (0.300", 7.62mm)	8-SMD (0.300", 7.62mm)	8-SMD (0.300", 7.62mm)	8-SMD (0.300", 7.62mm)	8-SMD (0.300", 7.62mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination Style	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing	Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Identical Performance)

ASSR-1420-302E is the direct equivalent to PAA132S, offering identical 600 mA load current and 1 Ohm on-state resistance. Both parts are Active status, RoHS3 compliant, and MSL 1 rated. This substitute provides pin-compatible replacement with no circuit redesign required.

Higher-Performance Alternatives

ASSR-1520-302E and ASSR-1520-502E provide enhanced load handling at 1 A with superior on-state resistance of 500 mOhms. These parts are suitable for applications requiring lower voltage drop and higher current capacity while maintaining the same 0–60 V load voltage range and dual SPST-NO configuration. Both are Active status and fully compliant.

Lower-Performance Alternatives

ASSR-1228-302E and ASSR-1228-502E are rated for 200 mA load current with 10 Ohm on-state resistance. These substitutes are applicable only in applications where load current does not exceed 200 mA and higher on-state resistance is acceptable. Both maintain full compliance and Active status.

Packaging Considerations

ASSR-1228-502E and ASSR-1520-502E are supplied in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats respectively, suitable for high-volume automated assembly. ASSR-1228-302E and ASSR-1420-302E are supplied in Tube packaging for lower-volume applications. All maintain identical 8-SMD footprint and gull wing termination.

Frequently Asked Questions (FAQ)

Q: Can ASSR-1228-302E replace PAA132S in all applications?

A: No. ASSR-1228-302E is rated for 200 mA maximum load current compared to PAA132S at 600 mA. Substitution is valid only for applications where load current does not exceed 200 mA. Additionally, the 10 Ohm on-state resistance of ASSR-1228-302E versus 1 Ohm for PAA132S results in higher voltage drop across the relay.

Q: Is ASSR-1420-302E a direct pin-for-pin replacement?

A: Yes. ASSR-1420-302E matches PAA132S in load current (600 mA), on-state resistance (1 Ohm), package footprint (8-SMD), and termination style (gull wing). No circuit modifications are required for substitution.

Q: What is the advantage of ASSR-1520-302E over PAA132S?

A: ASSR-1520-302E provides 1 A load current capacity and 500 mOhm on-state resistance, both superior to PAA132S specifications. This allows operation at higher load currents with reduced voltage drop. The part maintains the same 0–60 V load voltage range and dual SPST-NO configuration.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (ASSR-1228-302E, ASSR-1228-502E, ASSR-1420-302E, ASSR-1520-302E, ASSR-1520-502E) are RoHS3 compliant with MSL 1 rating, matching PAA132S compliance status.

Q: What is the difference between ASSR-1520-302E and ASSR-1520-502E?

A: Both parts are electrically identical with 1 A load current and 500 mOhm on-state resistance. The difference is packaging: ASSR-1520-302E is supplied in Tube format, while ASSR-1520-502E is supplied in Tape & Reel (TR) format. Selection depends on assembly volume and handling requirements.

Q: Can PAA132S be replaced with a lower-current part if the application only requires 150 mA?

A: Yes, if load current does not exceed 150 mA. However, the 10 Ohm on-state resistance of ASSR-1228-302E or ASSR-1228-502E will produce significantly higher voltage drop compared to PAA132S at 1 Ohm. Circuit analysis is required to confirm acceptable performance.

Q: Are input voltage differences between PAA132S (1.2 VDC) and ASSR substitutes (1.3 VDC) significant?

A: The 0.1 VDC difference is within normal operating tolerance for solid state relay trigger circuits. Both voltage levels are compatible with standard logic-level control signals (3.3 V, 5 V). No circuit modification is required.

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