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HCPL-J454#300 Equivalent & Substitute Parts
Part Overview
The HCPL-J454#300 is a 3750Vrms optoisolator with transistor output manufactured by Broadcom Limited. This component provides galvanic isolation for single-channel applications requiring high voltage isolation in 8-SMD surface mount packaging. The part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HCPL-J454#300 |
| Manufacturer | Broadcom Limited |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 3750Vrms |
| Current Transfer Ratio (Min) | 19% @ 16mA |
| Current Transfer Ratio (Max) | 60% @ 16mA |
| Turn On / Turn Off Time (Typ) | 500ns, 800ns |
| Input Type | DC |
| Output Type | Transistor |
| Voltage - Output (Max) | 20V |
| Current - Output / Channel | 8mA |
| Voltage - Forward (Vf) (Typ) | 1.59V |
| Current - DC Forward (If) (Max) | 25mA |
| Operating Temperature | -55°C ~ 100°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SMD, Gull Wing |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution of the HCPL-J454#300 is determined by the following critical parameters:
Isolation Voltage: Minimum 3750Vrms required. Substitutes with equal or higher isolation voltage are acceptable.
Output Configuration: Transistor output without base connection is the primary requirement. Transistor with base output represents a functional superset and is acceptable.
Current Transfer Ratio: Minimum 19% @ 16mA is the baseline specification. Substitutes meeting or exceeding this value maintain performance equivalence.
Switching Speed: Turn-on and turn-off times of 500ns and 800ns respectively define the speed class. Faster switching times are acceptable.
Package Compatibility: 8-SMD surface mount with gull wing leads is the specified form factor. Equivalent SMD packages are acceptable; through-hole packages require board redesign.
Operating Temperature Range: -55°C to 100°C defines the thermal operating envelope.
Input Type: DC input is required.
Output Voltage and Current: Maximum 20V output and 8mA per channel define the load-driving capability.
Substitutes are grouped into three categories: direct Broadcom equivalents (same isolation voltage, same package), parametric equivalents from Broadcom (same isolation voltage, same package, different CTR grade), and manufacturer-recommended alternatives from Vishay and Everlight (higher isolation voltage, compatible output characteristics).
Parameter Comparison
| Parameter | HCPL-J454#300 | HCPL-J454-300E | HCPL-J454-400E | 6N135-X007 | 6N135-X017 | 6N135S1(TA) | 6N136-X007 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Broadcom | Vishay | Vishay | Everlight | Vishay |
| Voltage - Isolation | 3750Vrms | 3750Vrms | 3750Vrms | 5300Vrms | 5300Vrms | 5000Vrms | 5300Vrms |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Current Transfer Ratio (Min) | 19% @ 16mA | 19% @ 16mA | 19% @ 16mA | 7% @ 16mA | 7% @ 16mA | 7% @ 16mA | 19% @ 16mA |
| Current Transfer Ratio (Max) | 60% @ 16mA | 60% @ 16mA | 60% @ 16mA | — | — | 50% @ 16mA | — |
| Turn On / Turn Off Time (Typ) | 500ns, 800ns | 500ns, 800ns | 500ns, 800ns | 300ns, 300ns | 300ns, 300ns | 350ns, 500ns | 200ns, 200ns |
| Input Type | DC | DC | DC | DC | DC | DC | DC |
| Output Type | Transistor | Transistor | Transistor | Transistor with Base | Transistor with Base | Transistor with Base | Transistor with Base |
| Voltage - Output (Max) | 20V | 20V | 20V | 15V | 15V | 20V | 15V |
| Current - Output / Channel | 8mA | 8mA | 8mA | 8mA | 8mA | 8mA | 8mA |
| Voltage - Forward (Vf) (Typ) | 1.59V | 1.59V | 1.59V | 1.33V | 1.33V | 1.45V | 1.33V |
| Current - DC Forward (If) (Max) | 25mA | 25mA | 25mA | 25mA | 25mA | 25mA | 25mA |
| Operating Temperature | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 100°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-DIP | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Discontinued | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Direct Broadcom Substitutes (Recommended for Pin-Compatible Replacement):
HCPL-J454-300E and HCPL-J454-400E are active Broadcom products with identical electrical specifications to the discontinued HCPL-J454#300. Both maintain 3750Vrms isolation, 19-60% current transfer ratio, and 8-SMD gull wing packaging. HCPL-J454-300E is ROHS3 compliant and represents the direct successor. HCPL-J454-400E offers identical performance with tube packaging. Both are recommended for designs requiring no circuit modification.
Vishay 6N135 Series (Higher Isolation Voltage, Compatible Output):
The 6N135-X007, 6N135-X007T, and 6N135-X017 variants provide 5300Vrms isolation, exceeding the original 3750Vrms specification. These parts feature transistor with base output, lower current transfer ratio (7% minimum), and faster switching (300ns on/off). The 6N135-X017 and 6N135-X017T are available in 8-SMD surface mount packages compatible with board layout. The 6N135-X007 is through-hole only and requires board redesign. All are ROHS3 compliant and active products.
Everlight 6N135S1 Series (Higher Isolation Voltage, Matched CTR):
The 6N135S1(TA), 6N135S1(TB), and 6N135S1(TB)-V variants from Everlight provide 5000Vrms isolation with 7-50% current transfer ratio and 350ns/500ns switching times. These parts feature transistor with base output and 8-SMD surface mount packaging. All are ROHS3 compliant and active products. The matched current transfer ratio upper limit (50%) aligns more closely with the original part's 60% maximum.
Vishay 6N136-X007 (Highest Performance Alternative):
The 6N136-X007 provides 5300Vrms isolation with 19% minimum current transfer ratio matching the original specification. Switching performance is superior at 200ns on/off times. This part features transistor with base output and 8-SMD surface mount packaging. ROHS3 compliant and active product status.
Frequently Asked Questions (FAQ)
Q: Can HCPL-J454-300E be used as a direct replacement for HCPL-J454#300?
A: Yes. HCPL-J454-300E maintains identical electrical specifications, package form factor, and pin configuration. The primary difference is ROHS3 compliance status. No circuit modification is required.
Q: What is the difference between HCPL-J454-300E and HCPL-J454-400E?
A: Both parts are electrically identical with 3750Vrms isolation and matching current transfer ratios. The difference is packaging: HCPL-J454-300E is supplied in standard packaging, while HCPL-J454-400E is supplied in tube packaging. Selection depends on procurement and handling requirements.
Q: Can Vishay 6N135 parts replace the HCPL-J454#300 directly?
A: 6N135-X017 and 6N135-X017T are pin-compatible 8-SMD surface mount alternatives. However, they feature lower current transfer ratio (7% minimum versus 19% minimum) and transistor with base output instead of transistor-only output. Circuit verification is required to confirm adequate drive capability. The 6N135-X007 is through-hole only and requires board redesign.
Q: What is the advantage of higher isolation voltage in substitute parts?
A: Substitute parts with 5000Vrms or 5300Vrms isolation provide additional safety margin and design flexibility for applications requiring higher voltage isolation. They are backward-compatible with 3750Vrms designs.
Q: Does the transistor with base output on substitute parts affect circuit compatibility?
A: Transistor with base output provides an additional connection point for base current control. In applications where the base is left unconnected, the part functions identically to transistor-only output. Circuit review is recommended to confirm compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: All active substitute parts listed (HCPL-J454-300E, HCPL-J454-400E, 6N135 series, 6N135S1 series, and 6N136-X007) are ROHS3 compliant. The original HCPL-J454#300 is RoHS non-compliant.
Q: What is the difference between 6N135-X017 and 6N135-X017T?
A: Both are electrically identical 8-SMD surface mount parts with 5300Vrms isolation. The difference is packaging: 6N135-X017 is supplied in tube packaging, while 6N135-X017T is supplied in tape and reel format. Selection depends on assembly line requirements.
Q: Can Everlight 6N135S1 parts be used interchangeably?
A: The 6N135S1(TA), 6N135S1(TB), and 6N135S1(TB)-V variants are electrically identical with 5000Vrms isolation and matching current transfer ratios. They differ only in internal manufacturing variants. All are pin-compatible and functionally equivalent.
Q: Which substitute offers the fastest switching performance?
A: The Vishay 6N136-X007 provides the fastest switching at 200ns turn-on and 200ns turn-off times, compared to 500ns/800ns for the original part and 300ns/300ns for 6N135 variants.
Q: Is the 6N136-X007 recommended over 6N135 variants?
A: The 6N136-X007 offers superior switching speed and matches the original part's 19% minimum current transfer ratio. However, it features transistor with base output. Selection depends on application requirements for switching speed and base control capability.
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