TRN 1-1221 Traco Power TRN 1-1221 is a 1W isolated DC/DC converter with dual ±5V outputs. It accepts a 9-18V input and provides 100mA per output in a compact 5-SIP through-hole package.
Mfr Part #:

TRN 1-1221

Available from 1 distributors
Mfr Name: Traco Power
Traco Power
Traco Power TRN 1-1221 is a 1W isolated DC/DC converter with dual ±5V outputs. It accepts a 9-18V input and provides 100mA per output in a compact 5-SIP through-hole package.
Total Stock: 10 pcs
$ Price Range: $11.24 - $11.84

TRN 1-1221 Available from 1 distributor

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TRN 1-1221 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
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Current
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Features
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Input Voltage (Nominal)
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Number of Outputs
Operating Temperature
Output Current (Maximum @ Output 2)
Output Voltage (Nominal @ Output 1)
Output Voltage (Nominal @ Output 2)
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TRN 1-1221 Description

Short technical summary and product information.

The Traco Power TRN 1-1221 is a 1-watt isolated DC/DC converter from the TRN 1 series. It delivers dual regulated outputs of +5V and -5V, each rated at 100mA maximum current. The converter operates from a nominal 12V input with a 9-18V range and achieves 79% typical efficiency.

 

This module provides 1600 VDC input-to-output isolation and includes short circuit protection (SCP). It is designed for commercial ITE (Information Technology Equipment) applications and operates over a -40°C to +90°C temperature range without derating.

 

The TRN 1-1221 is housed in a compact 5-SIP through-hole package measuring 11.9mm x 7.7mm x 11.0mm. Its fully regulated outputs and small footprint make it suitable for space-constrained designs requiring isolated bipolar supplies.

TRN 1-1221 Quick Information

Product Type: Isolated DC/DC Converter
Series: TRN 1
Canonical Name: Traco Power TRN 1-1221 Isolated DC/DC Converter, 5V and -5V Output, 1W
Subcategory: Board Mount Power Supplies

TRN 1-1221 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 95
REACH Status: REACH Unaffected
Lead Free: Yes

TRN 1-1221 Estimated Pricing

Qty Low High
1+ $11.84 $11.84
10+ $11.40 $11.40
100+ $11.36 $11.36
200+ $11.29 $11.29
500+ $11.24 $11.24

Estimated market price range - modelled values for guidance only, not live distributor offers.

TRN 1-1221 Features

  • Dual regulated ±5V outputs at 100mA each.
  • 1600 VDC input-to-output isolation.
  • Compact 5-SIP through-hole package.
  • Wide operating temperature range -40°C to +90°C.
  • Short circuit protection included.

TRN 1-1221 Applications

  • Suitable for industrial ITE equipment requiring bipolar supplies.
  • Ideal for powering op-amp circuits and analog sensors.
  • Used in isolated data acquisition systems.
  • Fits space-constrained board-level power designs.

TRN 1-1221 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the input voltage range of the TRN 1-1221?

The input voltage range is 9 V to 18 V DC, with a nominal input of 12 V.

What are the output voltages and currents?

Output 1 is +5 V at 100 mA maximum, and Output 2 is -5 V at 100 mA maximum.

What is the isolation voltage of this converter?

The isolation voltage is 1600 V DC.

What is the operating temperature range?

The operating temperature range is -40°C to +90°C.

What package does the TRN 1-1221 come in?

It comes in a 5-SIP Module (through-hole) package measuring 11.9 mm x 7.7 mm x 11.0 mm.

Is the TRN 1-1221 RoHS compliant?

The part is listed as RoHS3 Compliant, but this status is unverified.

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