Request Quote
(Ships tomorrow)
TLP521-1BLG Equivalent & Substitute Parts
Part Overview
The TLP521-1BLG is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides 5300Vrms isolation voltage and is housed in a 4-DIP package for through-hole mounting. The component is currently active in production with 697 pieces in stock. Substitute parts are identified based on matching electrical characteristics, isolation ratings, output specifications, and package compatibility to ensure functional equivalence in circuit applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TLP521-1BLG |
| Manufacturer | Isocom Components 2004 LTD |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5300Vrms |
| Current Transfer Ratio (Min) | 200% @ 1mA |
| Current Transfer Ratio (Max) | 600% @ 1mA |
| Output Type | Transistor |
| Voltage - Output (Max) | 55V |
| Current - Output / Channel | 50mA |
| Vce Saturation (Max) | 400mV |
| Operating Temperature | -30°C ~ 100°C |
| Package / Case | 4-DIP (0.400", 10.16mm) |
| Mounting Type | Through Hole |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the TLP521-1BLG are qualified based on the following critical parameters:
- Isolation Voltage: 5300Vrms (all substitutes match)
- Number of Channels: 1 (all substitutes match)
- Output Type: Transistor (all substitutes match)
- Maximum Output Voltage: 55V (all substitutes match)
- Maximum Output Current: 50mA per channel (all substitutes match)
- Current Transfer Ratio Range: 200% to 600% @ 1mA (all substitutes match)
- Package / Case: 4-DIP (0.400", 10.16mm) (all substitutes match)
- Mounting Type: Through Hole (all substitutes match)
- Operating Temperature Range: -30°C ~ 100°C (all substitutes match)
- RoHS Compliance: ROHS3 Compliant (all substitutes match)
All three substitute parts meet these core electrical and mechanical requirements, confirming functional equivalence with the main part number.
Parameter Comparison
| Parameter | TLP521-1BLG | ISP521-1XBLG | TLP521-1XBLG | TLP521XBLG |
|---|---|---|---|---|
| Manufacturer | Isocom Components 2004 LTD | Isocom Components 2004 LTD | Isocom Components 2004 LTD | Isocom Components 2004 LTD |
| Series | TLP521-1 | ISP521-1 | TLP521-1 | TLP521 |
| Number of Channels | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 5300Vrms | 5300Vrms | 5300Vrms | 5300Vrms |
| Current Transfer Ratio (Min) | 200% @ 1mA | 200% @ 1mA | 200% @ 1mA | 200% @ 1mA |
| Current Transfer Ratio (Max) | 600% @ 1mA | 600% @ 1mA | 600% @ 1mA | 600% @ 1mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | Not specified | 3µs, 3µs | 3µs, 3µs |
| Rise / Fall Time (Typ) | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs |
| Input Type | DC | DC | DC | DC |
| Output Type | Transistor | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 55V | 55V | 55V | 55V |
| Current - Output / Channel | 50mA | 50mA | 50mA | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V | 1.15V | 1.15V | 1.15V |
| Current - DC Forward (If) (Max) | 50 mA | 50 mA | 50 mA | 50 mA |
| Vce Saturation (Max) | 400mV | 400mV | 400mV | 400mV |
| Operating Temperature | -30°C ~ 100°C | -30°C ~ 100°C | -30°C ~ 100°C | -30°C ~ 100°C |
| Package / Case | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| Inventory Status | 697 Pcs New Original In Stock | 897 Pcs New Original In Stock | 843 Pcs New Original In Stock | 949 Pcs New Original In Stock |
Engineering Selection Recommendations
All three substitute parts are functionally equivalent to the TLP521-1BLG based on electrical and mechanical parameters. Selection among these parts should be based on the following factors:
Product Status: All parts are active in production with full inventory availability.
Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the main part's compliance profile.
Series Compatibility: TLP521-1XBLG and TLP521XBLG maintain the TLP521 series designation, while ISP521-1XBLG represents an alternative series variant. All three deliver identical electrical performance within the specified parameters.
Timing Specifications: ISP521-1XBLG does not specify turn-on and turn-off times, whereas TLP521-1BLG, TLP521-1XBLG, and TLP521XBLG all specify 3µs for both parameters. For applications requiring documented timing characteristics, TLP521-1XBLG or TLP521XBLG are preferred.
Inventory Availability: TLP521XBLG offers the highest stock level at 949 pieces, followed by ISP521-1XBLG at 897 pieces and TLP521-1XBLG at 843 pieces.
Frequently Asked Questions (FAQ)
Q: Can ISP521-1XBLG be used as a direct replacement for TLP521-1BLG?
A: Yes. ISP521-1XBLG meets all critical electrical and mechanical parameters: 5300Vrms isolation, 1 channel, transistor output, 55V maximum output voltage, 50mA output current, and 4-DIP through-hole package. The only difference is the undocumented turn-on/turn-off time specification.
Q: What is the difference between TLP521-1XBLG and TLP521XBLG?
A: Both parts are electrically identical and belong to the TLP521 series family. TLP521-1XBLG carries the "-1" designation in its part number, while TLP521XBLG does not. All electrical specifications, including isolation voltage, current transfer ratio, output ratings, and timing characteristics, are identical.
Q: Are all substitute parts compatible with the same PCB footprint?
A: Yes. All parts use the 4-DIP (0.400", 10.16mm) package with through-hole mounting, ensuring mechanical and electrical compatibility with the same PCB layout.
Q: Do the substitute parts maintain the same temperature operating range?
A: Yes. All substitute parts operate across the identical temperature range of -30°C to 100°C.
Q: Which substitute part should be selected for applications requiring documented timing specifications?
A: TLP521-1XBLG or TLP521XBLG are recommended, as both specify turn-on and turn-off times of 3µs. ISP521-1XBLG does not provide this specification.
Q: Are all parts RoHS compliant?
A: Yes. All parts, including the main part and all substitutes, are ROHS3 compliant with MSL rating of 1 (Unlimited).
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts