HCPL-4504#320 Equivalent & Substitute Parts

Part Overview

The HCPL-4504#320 is a 5000Vrms optoisolator with transistor output, single channel, housed in 8-SMD surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The part operates across -55°C to 100°C and provides 1 channel of galvanic isolation suitable for high-voltage switching and signal transmission applications.

Substiute Parts

HCPL-4504#320

Broadcom LimitedIn Stock: 870HCPL-4504#320 Datasheet

Current PartRFQ

HCPL-4504-320E

Broadcom LimitedIn Stock: 890HCPL-4504-320E Datasheet

DirectRFQ

6N135SMT&R

Isocom Components 2004 LTDIn Stock: 20046N135SMT&R Datasheet

MFR RecommendedRFQ

6N136-X017T

Vishay Semiconductor Opto DivisionIn Stock: 8576N136-X017T Datasheet

MFR RecommendedRFQ

6N136SMT&R

Isocom Components 2004 LTDIn Stock: 22396N136SMT&R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Voltage - Isolation: 5000Vrms minimum (5300Vrms acceptable as higher rating)
• Number of Channels: 1 channel required
• Output Type: Transistor or Transistor with Base (base output compatible with transistor-only designs)
• Current Transfer Ratio: Minimum 25% @ 16mA preferred; lower ratios acceptable if application permits
• Voltage - Output (Max): 20V minimum required
• Current - Output / Channel: 8mA minimum
• Operating Temperature: -55°C ~ 100°C range required
• Package / Case: 8-SMD, Gull Wing form factor required
• Mounting Type: Surface Mount required

All substitute parts listed maintain these critical parameters within acceptable tolerances for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

HCPL-4504-320E (Broadcom Limited): Direct equivalent from the same manufacturer. Identical electrical specifications and package. Product status is Active with ROHS3 compliance, addressing the discontinued status of the original part. Recommended as primary replacement for existing HCPL-4504#320 designs.

6N135SMT&R (Isocom Components 2004 LTD): Functionally compatible substitute with 5000Vrms isolation and transistor-with-base output. Current transfer ratio minimum of 7% is lower than the original 25%, requiring circuit validation. Active product status with ROHS3 compliance. Suitable for applications where base control is beneficial.

6N136-X017T (Vishay Semiconductor Opto Division): Compatible substitute with 5300Vrms isolation rating (exceeds 5000Vrms requirement). Output voltage maximum of 15V is lower than the original 20V specification; applications requiring full 20V output require evaluation. Transistor-with-base output. Active product status with ROHS3 compliance.

6N136SMT&R (Isocom Components 2004 LTD): Functionally compatible substitute with 5000Vrms isolation and transistor-with-base output. Current transfer ratio minimum of 19% is lower than the original 25%. Turn-on time of 150ns is faster than original 200ns. Active product status with ROHS3 compliance.

All substitute parts provide ROHS3 compliance, addressing environmental regulatory requirements not met by the discontinued original part.

Frequently Asked Questions (FAQ)

Q: Can I use a part with transistor-with-base output to replace the transistor-only HCPL-4504#320?

A: Yes. Transistor-with-base output is functionally compatible with transistor-only designs. The base connection can be left unconnected or tied to the collector, allowing the part to operate as a standard transistor output. This provides additional design flexibility without compromising compatibility.

Q: What is the significance of the Current Transfer Ratio (CTR) difference between the main part and substitutes?

A: Current Transfer Ratio determines the output current relative to input current. The HCPL-4504#320 specifies 25% minimum CTR, while some substitutes (6N135SMT&R, 6N136-X017T, 6N136SMT&R) specify lower minimums. Lower CTR requires higher input current to achieve the same output current. Circuit designs must accommodate this difference through input drive adjustments.

Q: Is the 6N136-X017T suitable if my application requires 20V output?

A: The 6N136-X017T specifies 15V maximum output voltage, compared to 20V for the original part. Applications requiring full 20V output operation must evaluate whether 15V output meets functional requirements. Designs operating below 15V are unaffected.

Q: What is the difference between Tape & Reel (TR) and Tube packaging?

A: Tape & Reel packaging is standard for automated assembly processes and high-volume production. Tube packaging is used for lower-volume or manual assembly applications. Both packaging formats contain identical components; selection depends on assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original HCPL-4504#320 is RoHS non-compliant. Substitution with any listed part addresses RoHS compliance requirements for new designs or manufacturing transitions.

Q: Can I directly substitute 6N136-X017T for HCPL-4504#320 without circuit modification?

A: Direct substitution is possible for applications operating below 15V output. The 5300Vrms isolation rating exceeds the original 5000Vrms specification. However, the lower output voltage maximum and lower current transfer ratio minimum require circuit evaluation to confirm compatibility with specific application requirements.