DAS1004812 DC DC Converter 12V 102W Equivalent & Substitute Parts

Part Overview

The DAS1004812 is an isolated PoE module DC DC converter manufactured by Cosel USA, Inc., designed to convert input voltages between 36V and 72V to a regulated 12V output at 8.5A maximum current, delivering 102W of power. This component is classified as obsolete, necessitating identification of active equivalent alternatives for continued system support and new designs. The part features 500V isolation, through-hole mounting in a 12-DIP module package, and operates across a temperature range of -10°C to 85°C with 82% efficiency.

Key Parameters

Parameter	Value
Manufacturer	Cosel USA, Inc.
Series	DAS (100W)
Product Status	Obsolete
Type	Isolated PoE Module
Input Voltage Range	36V - 72V
Output Voltage	12V
Output Current (Max)	8.5A
Power Rating	102W
Isolation Voltage	500V
Mounting Type	Through Hole
Package Type	12-DIP Module
Operating Temperature	-10°C ~ 85°C
Efficiency	82%
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

The CBS1004812 qualifies as a direct substitute for the DAS1004812 based on the following critical parameters:

Matching Electrical Specifications:

Single isolated output at 12V nominal voltage
Input voltage range of 36V minimum to 76V maximum (encompasses the DAS1004812 range of 36V - 72V)
Output current rating of 8.4A (within 1.2% of the DAS1004812's 8.5A specification)
Through-hole mounting configuration
Commercial ITE application classification

Enhanced Performance Characteristics:

Active product status (versus obsolete DAS1004812)
Higher isolation voltage rating of 1.5kV (versus 500V)
Improved efficiency of 89% (versus 82%)
Extended operating temperature range of -40°C to 100°C (versus -10°C to 85°C)
ROHS3 compliance (versus RoHS compliance)

Package Consideration: The CBS1004812 uses a 9-DIP module package versus the 12-DIP module of the DAS1004812. Physical dimensions differ: CBS1004812 measures 2.40" L x 2.28" W x 0.50" H compared to DAS1004812's 5.12" L x 2.28" W x 0.50" H. This represents a significant footprint reduction that may require PCB layout modification.

Parameter Comparison

Parameter	DAS1004812	CBS1004812	Compatibility Notes
Manufacturer	Cosel USA, Inc.	Cosel USA, Inc.	Same manufacturer
Product Status	Obsolete	Active	CBS1004812 actively supported
Type	Isolated PoE Module	Isolated Module	Both isolated topologies
Input Voltage (Min)	36V	36V	Identical minimum
Input Voltage (Max)	72V	76V	CBS1004812 supports higher input
Output Voltage	12V	12V	Identical output voltage
Output Current (Max)	8.5A	8.4A	0.1A difference, functionally equivalent
Power Rating	102W	100.8W (12V × 8.4A)	Comparable power delivery
Isolation Voltage	500V	1.5kV	CBS1004812 provides enhanced isolation
Mounting Type	Through Hole	Through Hole	Identical mounting method
Package Type	12-DIP Module	9-DIP Module	Different package; PCB layout modification required
Operating Temperature	-10°C ~ 85°C	-40°C ~ 100°C	CBS1004812 supports wider range
Efficiency	82%	89%	CBS1004812 offers 7% efficiency improvement
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both RoHS compliant; CBS1004812 meets ROHS3
Features	Not specified	Remote On/Off, OCP, OTP, OVP	CBS1004812 includes protection features

Engineering Selection Recommendations

Primary Substitute: CBS1004812

The CBS1004812 is the designated substitute for the obsolete DAS1004812. Selection of the CBS1004812 is supported by the following engineering criteria:

Product Status and Lifecycle: The DAS1004812 is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The CBS1004812 maintains active product status with confirmed inventory of 5,362 pieces, ensuring supply chain continuity and manufacturer support.

Electrical Compatibility: Both converters operate within the same input voltage window (36V - 76V), deliver identical 12V output, and provide comparable output current ratings (8.5A versus 8.4A). The electrical interface remains functionally equivalent for applications requiring 12V power conversion from 36V - 72V input sources.

Compliance and Certification: Both parts maintain RoHS compliance. The CBS1004812 achieves ROHS3 certification, representing current regulatory alignment. Both components carry EAR99 ECCN classification and identical HTSUS codes (8504.40.9580), confirming regulatory equivalence.

Performance Enhancement: The CBS1004812 delivers measurable improvements: 89% efficiency versus 82%, extended temperature range (-40°C to 100°C versus -10°C to 85°C), and enhanced isolation voltage (1.5kV versus 500V). These improvements provide design margin and extended operational capability.

Package Consideration: The transition from 12-DIP to 9-DIP packaging requires PCB layout modification. The CBS1004812 footprint is significantly smaller (2.40" L x 2.28" W versus 5.12" L x 2.28" W), necessitating board redesign. This represents the primary implementation constraint for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the CBS1004812 directly replace the DAS1004812 without PCB modification?

A: Electrical substitution is direct; however, physical substitution requires PCB layout modification. The CBS1004812 uses a 9-DIP module package measuring 2.40" L x 2.28" W x 0.50" H, while the DAS1004812 uses a 12-DIP module measuring 5.12" L x 2.28" W x 0.50" H. Pin configuration and mounting hole spacing differ between packages. PCB redesign is necessary for mechanical compatibility.

Q: Are the input and output voltage specifications compatible?

A: Yes. The CBS1004812 accepts input voltages from 36V to 76V, which encompasses the DAS1004812 operating range of 36V to 72V. Both converters produce identical 12V regulated output. Output current ratings are functionally equivalent (8.5A versus 8.4A), representing a 1.2% difference within typical engineering tolerance.

Q: What are the key differences in electrical performance?

A: The CBS1004812 provides three measurable improvements: efficiency increases from 82% to 89%, isolation voltage increases from 500V to 1.5kV, and operating temperature range expands from -10°C to 85°C to -40°C to 100°C. These enhancements provide additional design margin and extended operational capability across temperature extremes.

Q: Does the CBS1004812 include additional protection features?

A: Yes. The CBS1004812 incorporates Remote On/Off control, Over-Current Protection (OCP), Over-Temperature Protection (OTP), and Over-Voltage Protection (OVP). The DAS1004812 specification does not list these features. These protections enhance system reliability and fault tolerance.

Q: Are both parts RoHS compliant?

A: Yes. The DAS1004812 is RoHS compliant. The CBS1004812 is ROHS3 compliant, representing current regulatory certification. Both parts meet RoHS requirements for hazardous substance restriction.

Q: What is the inventory status for each part?

A: The DAS1004812 has 793 pieces in stock but is classified as obsolete with no ongoing manufacturing. The CBS1004812 has 5,362 pieces in stock and maintains active product status with continued manufacturer support and availability.

Q: Can I use the CBS1004812 in applications requiring the extended temperature range of the DAS1004812?

A: The CBS1004812 actually provides a wider operating temperature range (-40°C to 100°C) compared to the DAS1004812 (-10°C to 85°C). This represents an enhancement that supports operation across a broader temperature spectrum.

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