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Equivalent & Substitute Parts Reference for PKB4418PIOANB
Part Overview
The PKB4418PIOANB by Flex Power Modules is an isolated module DC-DC converter providing a single 1.5V output at up to 30A, with a 36V–75V input range and 45W maximum output power. It is designed for ITE (Commercial) applications, features adjustable output, remote on/off, and remote sense capabilities, and is housed in an Eighth Brick through-hole package. This product is now classified as obsolete, necessitating selection of alternative compatible models to ensure continuity in production, support, and replacements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PKB4418PIOANB |
| Series | PKB 4000 (90W) |
| Type | Isolated Module |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 36V |
| Voltage - Input (Max) | 75V |
| Voltage - Output 1 | 1.5V |
| Current - Output (Max) | 30A |
| Power (Watts) | 45 W |
| Voltage - Isolation | 2.25 kV |
| Efficiency | 88.8% |
| Features | Adjustable Output, Remote On/Off, Remote Sense |
| Operating Temperature | -40°C ~ 120°C (With Derating) |
| Mounting Type | Through Hole |
| Package / Case | Eighth Brick |
| Size / Dimension | 2.30" L x 0.89" W x 0.32" H (58.4mm x 22.7mm x 8.1mm) |
| Control Features | Enable, Active Low |
| Approval Agency | CB, CSA, IEC, TUV, UL |
| Standard Number | 62368-1 |
| RoHS Status | ROHS3 Compliant |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution was determined strictly by core electrical and mechanical characteristics: input voltage range, output voltage, mounting type, package, functionality, and compliance certifications. Only DC-DC converters with matched or compatible input/output voltages, output current ratings, efficiency, form factor (Eighth Brick, Through Hole), control features, approved agencies, and RoHS/REACH status were included. Product status (active/obsolete) was used for selection prioritization.
Key substitution parameters:
- Voltage - Input (Min/Max)
- Voltage - Output 1
- Current - Output (Max)
- Power (Watts)
- Mounting Type and Package / Case
- Operating Temperature Range
- Efficiency
- Features and Control Features
- Agency Approvals and Standards
- Compliance Status (RoHS, REACH)
Parameter Comparison
| Parameter | PKB4418PIOANB (Main) | PKB4918HCPI (Substitute) |
|---|---|---|
| Manufacturer Part Number | PKB4418PIOANB | PKB4918HCPI |
| Series | PKB 4000 (90W) | PKB 4000C |
| Type | Isolated Module | Isolated Module |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 36V | 36V |
| Voltage - Input (Max) | 75V | 75V |
| Voltage - Output 1 | 1.5V | 1.5V |
| Current - Output (Max) | 30A | 60A |
| Power (Watts) | 45 W | 90 W |
| Voltage - Isolation | 2.25 kV | 1.5 kV |
| Efficiency | 88.8% | 88.5% |
| Features | Adjustable Output, Remote On/Off, Remote Sense | Adjustable Output, Remote On/Off, Remote Sense |
| Operating Temperature | -40°C ~ 120°C (With Derating) | -40°C ~ 125°C (With Derating) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Eighth Brick | Eighth Brick |
| Size / Dimension | 2.30" L x 0.89" W x 0.32" H | 2.30" L x 0.89" W x 0.34" H |
| Control Features | Enable, Active Low | Enable, Active Low |
| Approval Agency | CB, CSA, IEC, TUV, UL | CB, CSA, IEC, TUV, UL |
| Standard Number | 62368-1 | 62368-1 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
PKB4418PIOANB is listed as obsolete; PKB4918HCPI is active. Both DC-DC converters meet RoHS3 compliance and are REACH unaffected. Agency approvals and standard number (62368-1) are identical, supporting direct substitution where compliance and certification continuity are required. Package style and mounting are consistent.
Frequently Asked Questions (FAQ)
Q1: What electrical specs must match for substitution?
DC-DC converter substitutes require matched input voltage range and output voltage. Output current and power must be sufficient for application requirements.
Q2: Is there any difference in physical form factor or mounting?
Both PKB4418PIOANB and PKB4918HCPI use Eighth Brick through-hole packages with similar dimensions, supporting mechanical compatibility.
Q3: How do certification and compliance compare?
Both products are ROHS3 compliant, REACH unaffected, and approved by CB, CSA, IEC, TUV, UL under standard 62368-1.
Q4: Are control features and adjustable outputs maintained in the substitute?
Yes, both models provide adjustable output, remote on/off, remote sense, and active low enable control features.
Q5: What are the key differences between the main and substitute part?
PKB4918HCPI offers higher output current (60A vs. 30A) and greater power (90W vs. 45W); isolation voltage is 1.5kV for PKB4918HCPI compared to 2.25kV for PKB4418PIOANB.
Q6: Is operating temperature range compatible?
PKB4918HCPI supports an extended upper limit (-40°C to 125°C with derating) relative to the main part (-40°C to 120°C).
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