TRA 1-1221 Equivalent & Substitute Parts Reference

Part Overview

The TRA 1-1221 is an isolated DC-DC converter module manufactured by Traco Power. It provides two outputs of +5V and -5V at a maximum current of 100mA each, operating from a 10.8V to 13.2V input voltage range, with a total output power of 1W. The module features 1kV isolation and is designed for ITE (commercial) applications, with short circuit protection, 84.5% efficiency, and a through-hole 6-SIP module package.

This product is listed as "Not For New Designs." Due to product lifecycle status, sourcing and long-term availability constraints may require identifying substitute models with strictly matching electrical, mechanical, and compliance parameters.

Substiute Parts

TRA 1-1221

Traco PowerIn Stock: 860TRA 1-1221 Datasheet

Current PartRFQ

IQ1205S

XP PowerIn Stock: 960IQ1205S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitutes are grouped strictly according to the following allowed parameters:

• Input voltage range (10.8V – 13.2V)
• Output voltages (+5V, -5V)
• Output current (max 100mA per output)
• Output power (1W total)
• Isolation voltage (1kV)
• Number of outputs (2)
• Mounting type (Through Hole)
• Package/case compatibility
• RoHS compliance
• Application (ITE, commercial)
• Efficiency
• Operating temperature range
• Mechanical dimensions

Only parts conforming to these key parameters are considered equivalents in this product category.

Parameter Comparison

Engineering Selection Recommendations

TRA 1-1221 is marked as "Not For New Designs." IQ1205S maintains equal or similar compliance parameters, including ROHS3 compliance and ECCN export control classification. Both models are designed for ITE (commercial) applications. IQ1205S is listed as "Active," supporting sustained supply chain security. Only inventory status, product lifecycle, and provided compliance certifications are considered.

Frequently Asked Questions (FAQ)

Q1: What critical parameters ensure compatibility when substituting TRA 1-1221?
Key substitution parameters are input voltage range, output voltages, maximum output currents, isolation voltage, total output power, mounting type, package/case form factor, application classification, efficiency, and compliance status.

Q2: Are there mechanical differences between TRA 1-1221 and IQ1205S?
Both parts use SIP packages with similar dimensions (IQ1205S has a 7-SIP package, 6 leads; TRA 1-1221 uses a 6-SIP, 4 leads), and their physical dimensions are closely matched.

Q3: Is the operating temperature range a selection consideration?
TRA 1-1221 supports up to 95°C (with derating), while IQ1205S supports up to 85°C. The allowable operating temperature must reflect application requirements.

Q4: Do both converters maintain the same export and environmental compliance?
Both TRA 1-1221 and IQ1205S are ROHS3 compliant and classified for EAR99 export.

Q5: Does the substitute part provide the same key functional features?
Both provide isolated dual outputs (+5V, -5V) at 100mA each with 1kV isolation and similar efficiency, aligning for ITE (commercial) applications.