SCHURTER 4430.1203 Circuit Breaker Thermal 20A 240VAC 60VDC Equivalent & Substitute Parts

Part Overview

The SCHURTER 4430.1203 is a thermal circuit breaker rated for 20A at 240V AC and 60V DC, featuring a rocker panel mount actuator with dual-pole configuration. This component is classified as Active product status and is ROHS3 compliant. Substitute parts become necessary when the primary part number is unavailable, when inventory levels require sourcing from alternative stock locations, or when design flexibility permits selection from qualified equivalent models within the same electrical and mechanical parameter set.

Key Parameters

Parameter	Value
Manufacturer	SCHURTER Inc.
Series	TA45
Breaker Type	Thermal
Current Rating	20A
Voltage Rating - AC	240V
Voltage Rating - DC	60V
Mounting Type	Panel Mount
Actuator Type	Rocker
Number of Poles	2
Packaging	Bulk
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All substitute parts listed maintain identical electrical specifications: 20A current rating, 240V AC and 60V DC voltage ratings, thermal breaker type, dual-pole configuration, and rocker panel mount actuator. Substitution is valid across all listed part numbers because they share the complete parameter set that defines functional equivalence within the TA45 series. The key parameters determining substitutability are current rating, voltage ratings (both AC and DC), breaker type, number of poles, mounting type, and actuator type. All substitute parts are manufactured by SCHURTER Inc., packaged in bulk, and maintain ROHS3 compliance.

Parameter Comparison

Part Number	Current Rating	Voltage AC	Voltage DC	Breaker Type	Poles	Mounting	Actuator	Series	RoHS Status	Inventory (Pcs)
4430.1203	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	733
4430.0035	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	673
4430.0038	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	688
4430.0572	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	951
4430.0978	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	1070
4430.0988	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	1097
4430.1067	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	922
4430.1068	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	916
4430.161	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	753
4430.1629	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	1098
4430.1789	20A	240V	60V	Thermal	2	Panel Mount	Rocker	TA45	ROHS3 Compliant	1031

Engineering Selection Recommendations

All listed substitute parts are Active product status and ROHS3 compliant. Parts 4430.1203, 4430.0572, 4430.1067, 4430.1068, and 4430.161 carry full approval agency certifications (CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077). Parts 4430.0035, 4430.0038, 4430.0978, 4430.0988, 4430.1629, and 4430.1789 are ROHS3 compliant with either Not Applicable or Vendor Undefined MSL status. Selection among these equivalents may be based on inventory availability, certification requirements for specific applications, and MSL classification where moisture sensitivity is a design consideration.

Frequently Asked Questions (FAQ)

Q: Are all listed part numbers electrically interchangeable with 4430.1203? A: Yes. All substitute parts share identical electrical parameters: 20A current rating, 240V AC and 60V DC voltage ratings, thermal breaker type, and dual-pole configuration. They are parametric equivalents within the TA45 series.

Q: What is the difference between parts with and without full approval agency certifications? A: Parts 4430.1203, 4430.0572, 4430.1067, 4430.1068, and 4430.161 carry certifications from CSA, EN, GB, IEC, and UL standards. Parts without these certifications listed are still ROHS3 compliant and suitable for applications where these specific certifications are not required.

Q: Can I use these parts interchangeably in existing designs? A: Yes, provided the design does not specify a particular part number. All substitute parts maintain identical mounting type (panel mount), actuator type (rocker), and mechanical form factor within the TA45 series.

Q: What does MSL (Moisture Sensitivity Level) mean for these parts? A: MSL indicates moisture sensitivity during storage and handling. Parts marked "Not Applicable" have no moisture sensitivity requirement. Parts marked "Vendor Undefined" should be treated according to standard component handling practices.

Q: Which part number should I select if inventory is a concern? A: Part 4430.1629 has the highest inventory at 1,098 pieces, followed by 4430.0988 at 1,097 pieces and 4430.0978 at 1,070 pieces. All parts are available in bulk packaging.

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