SSA-100 Current Sensor Equivalent & Substitute Parts

Part Overview

The SSA-100 is a 100A isolated current sensor manufactured by Riedon, designed for DC current measurement applications. This shunt-based sensor module provides ratiometric voltage output with bidirectional measurement capability and is housed in a chassis-mount module package.

The SSA-100 carries a "Not For New Designs" product status, indicating that Riedon has discontinued active development for this component. This status necessitates identification of functionally equivalent alternatives for ongoing production requirements and new design implementations.

Substiute Parts

SSA-100

RiedonIn Stock: 1282SSA-100 Datasheet

Current PartRFQ

SSA2-100

Riedon products by BournsIn Stock: 1203SSA2-100 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SSA-100 is determined by equivalence across the following critical parameters:

Current Sensing Capability: The substitute must support 100A measurement range with shunt-based sensing architecture.

Output Characteristics: Ratiometric voltage output is required to maintain signal compatibility with existing measurement circuits.

Electrical Interface: Supply voltage range (3V ~ 5.5V), response time (1.6µs), and frequency response (300kHz) must be maintained or exceeded.

Mechanical Compatibility: Chassis-mount module package configuration must be preserved for form-factor compatibility.

Polarization: Bidirectional measurement capability must be retained.

Environmental Compliance: RoHS3 compliance and operating temperature specifications determine suitability for regulated applications.

The SSA2-100 meets these substitution criteria while offering extended temperature range and AC/DC measurement capability, providing functional equivalence with enhanced operational flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Existing SSA-100 Designs: The SSA2-100 provides direct functional substitution. All critical electrical parameters remain equivalent, with identical supply voltage, response time, and frequency response specifications. The form factor and mounting configuration are preserved, enabling direct replacement without circuit redesign.

For New Design Implementation: The SSA2-100 is the appropriate selection due to its Active product status. The SSA-100's "Not For New Designs" designation indicates discontinued development support and potential long-term supply constraints. The SSA2-100 offers equivalent performance with extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) and AC/DC measurement capability, providing enhanced operational flexibility for future applications.

Compliance Considerations: Both components maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for regulated markets. No compliance-related barriers exist to substitution.

Accuracy Trade-off: The SSA2-100 specifies ±0.2% accuracy compared to the SSA-100's ±0.1%. This 0.1% difference is within acceptable tolerance for most industrial current measurement applications. Applications requiring ±0.1% accuracy must evaluate this specification change against system-level requirements.

Frequently Asked Questions (FAQ)

Q: Can the SSA2-100 directly replace the SSA-100 in existing circuit designs?

A: Yes. The SSA2-100 maintains electrical and mechanical compatibility with the SSA-100. Supply voltage range, output type, response time, and mounting configuration are identical. No circuit modifications are required for direct substitution.

Q: What is the significance of the SSA-100's "Not For New Designs" status?

A: This designation indicates that Riedon has concluded active development and support for the SSA-100 product line. New designs should utilize the SSA2-100, which carries Active product status and receives ongoing manufacturer support.

Q: Does the SSA2-100 support AC current measurement while the SSA-100 supports only DC?

A: Yes. The SSA2-100 is specified for AC/DC measurement, while the SSA-100 is limited to DC measurement. For applications requiring AC current sensing, the SSA2-100 provides this extended capability. For DC-only applications, both components are functionally equivalent.

Q: Is the 0.1% accuracy difference between SSA-100 (±0.1%) and SSA2-100 (±0.2%) significant?

A: The difference is application-dependent. For most industrial current measurement applications, ±0.2% accuracy is acceptable. Applications with stringent accuracy requirements below ±0.2% must evaluate this specification against system-level tolerance budgets.

Q: What is the advantage of the SSA2-100's extended temperature range?

A: The SSA2-100 operates to 125°C compared to the SSA-100's 85°C maximum. This extended range enables deployment in higher-temperature environments, such as industrial equipment with elevated ambient conditions or proximity to heat sources.

Q: Are both components available in the same packaging format?

A: Yes. Both the SSA-100 and SSA2-100 are supplied in Bulk packaging as chassis-mount modules. No packaging format changes are required for substitution.

Q: What compliance certifications apply to both components?

A: Both the SSA-100 and SSA2-100 are ROHS3 compliant and REACH Unaffected. No regulatory barriers exist to substitution in regulated markets.