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NXP Semiconductors BY459X-1500,127
- Part No.:
- BY459X-1500,127
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
BY459X-1500,127.pdf
- Description:
- DIODE GEN PURP 1.5KV 12A TO220FP
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
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Product details
Overview
BY459X-1500,127 from NXP Semiconductors (formerly Philips) is a fast, high-voltage damper diode in SOD113 package, rated for 1500 V peak repetitive reverse voltage (VRRM), 12 A peak forward current at 48 kHz, and ≤350 ns reverse recovery time (trr). It features isolated mounting tab, soft recovery characteristic, and low forward voltage (VF ≤ 1.30 V @ 6.5 A, 25 °C), designed specifically for horizontal deflection circuits in HDTV receivers and multi-sync monitors.
For engineers reviewing the BY459X-1500,127 datasheet, BY459X-1500,127 pinout, BY459X-1500,127 application, or BY459X-1500,127 equivalent, key selection criteria include VRRM = 1500 V, trr ≤ 350 ns, isolated heatsink interface, VF ≤ 1.30 V @ 6.5 A, and thermal resistance Rth j-hs ≤ 4.8 K/W with heatsink compound.
Technical Context
This damper diode operates in high-frequency flyback switching environments where rapid turn-off and controlled reverse recovery are critical to suppress voltage spikes across horizontal output transistors. Its soft recovery reduces EMI generation and stress on adjacent components in deflection yoke circuits.
The device integrates glass-passivated double-diffused junction technology and an electrically isolated mounting tab-enabling direct heatsink attachment without insulating washers while maintaining ≥2500 V RMS isolation between terminals and heatsink per IEC 60747-5-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1500 V - Withstands peak repetitive reverse voltage in horizontal deflection flyback phase without breakdown. |
| trr | ≤350 ns - Ensures fast, soft reverse recovery to minimize switching losses and voltage overshoot in 15–30 kHz line scan circuits. |
| VF @ 6.5 A, 25 °C | ≤1.30 V - Low conduction loss reduces power dissipation during high-current pulse conduction in damper function. |
| IF(peak) | 12 A @ 48 kHz - Supports high peak current capability required for CRT horizontal deflection timing waveforms. |
| Visol | 2500 V RMS - Enables safe, direct-mount heatsinking without additional insulation, simplifying mechanical design and thermal management. |
| Rth j-hs | ≤4.8 K/W - Delivers effective junction-to-heatsink thermal transfer when used with thermal compound, supporting continuous operation at Tj ≤ 150 °C. |
Pinout & Package
Package: SOD113 - Plastic single-ended TO-220 full-pack variant with electrically isolated mounting tab, 2 leads, and 2 g net mass. Mounting hole enables secure heatsink attachment; seating plane is isolated from all terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to collector of horizontal output transistor; carries flyback current during retrace interval. |
| 2 | Anode | Connected to deflection yoke return path and supply rail; defines forward conduction direction during sweep. |
| Tab | Isolated Heatsink Interface | Electrically isolated metal surface for direct thermal coupling to heatsink; rated for 2500 V RMS isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Soft Recovery Characteristic | trr ≤ 350 ns with low Qs (≤3.0 µC) minimizes dV/dt-induced ringing and EMI in high-di/dt deflection circuits. |
| Glass-Passivated Junction | Double-diffused structure with hermetic glass passivation ensures long-term reliability under thermal cycling in consumer display applications. |
| Isolated Mounting Tab | Enables direct heatsink mounting without mica washers or silicone pads-reducing thermal interface resistance by up to 30% vs. insulated solutions. |
| High Thermal Cycling Performance | Validated for >1000 cycles between −40 °C and +150 °C junction temperature-critical for field-deployed CRT-based equipment. |
Applications
| HDTV Horizontal Deflection | Multi-Sync Monitor Deflection |
|---|---|
Use Scenario: High-frequency horizontal scanning (15–30 kHz) in analog HDTV receivers using flyback transformer energy recovery. IC Role / Device Role / Timing Role: Damper diode clamping flyback voltage spike across horizontal output transistor during retrace. Use Value: Soft recovery and 1500 V VRRM prevent transistor avalanche failure and reduce snubber component count. | Use Scenario: Variable-line-frequency horizontal deflection in multi-sync computer monitors supporting 31–120 kHz scan rates. IC Role / Device Role / Timing Role: Energy recirculation path during line retrace; absorbs stored inductive energy from deflection yoke. Use Value: 12 A IF(peak) at 48 kHz and isolated tab support stable operation across wide frequency range without thermal derating. |
| Industrial CRT Display Systems | Legacy Broadcast Video Equipment |
Use Scenario: Continuous-duty CRT displays in industrial control panels requiring extended thermal stability and vibration resistance. IC Role / Device Role / Timing Role: Primary damper in horizontal output stage; handles repetitive surge currents up to 100 A IFSM. Use Value: Rth j-hs ≤ 4.8 K/W and Tj max = 150 °C enable reliable operation in unventilated enclosures. | Use Scenario: Analog video signal processing and raster generation in broadcast studio monitors and test equipment. IC Role / Device Role / Timing Role: Flyback energy clamp in precision horizontal timing circuits with tight jitter tolerance. Use Value: Low VF (≤1.30 V) and consistent trr ensure stable linearity and minimal geometry distortion over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar damper diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH12015TV | VRRM = 1500 V, trr = 35 ns (faster), VF = 1.85 V @ 12 A (higher), TO-247 package, non-isolated tab | Lower trr improves EMI but higher VF increases conduction loss; requires insulating hardware for heatsink mounting | Select when ultra-fast recovery is prioritized over thermal efficiency and mounting simplicity |
| VS-12EWH06-M3 | VRRM = 600 V (lower), trr = 45 ns, VF = 1.15 V @ 12 A, TO-247 package, isolated tab, 600 V rating limits use to lower-voltage deflection designs | Insufficient VRRM for 1500 V CRT flyback circuits; suitable only for auxiliary or low-voltage clamp functions | Not recommended as direct replacement; consider only in redesigns with reduced deflection voltage requirements |
Compared with STTH12015TV and VS-12EWH06-M3, the BY459X-1500,127 uniquely balances 1500 V ruggedness, soft recovery, low VF, and integrated isolation-making it optimal for legacy CRT horizontal deflection where reliability and thermal simplicity outweigh ultra-fast switching needs.
Availability
BY459X-1500,127 is available at Aetrix Electronics and suitable for HDTV receiver design, multi-sync monitor production, and industrial CRT display system repair requiring stable component supply and long-lifecycle availability.
Supply support for BY459X-1500,127 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in high-reliability analog, logic, and power discrete solutions.
The BY459X series belongs to NXP's legacy high-voltage power diode product line, engineered specifically for CRT horizontal deflection damper applications demanding robust surge handling, thermal resilience, and electrical isolation.
FAQ
What is the maximum junction temperature rating for BY459X-1500,127?
The BY459X-1500,127 has a maximum operating junction temperature (Tj) of 150 °C, validated under continuous forward conduction and pulsed surge conditions. This rating supports reliable operation in enclosed CRT display chassis with limited airflow, provided thermal resistance to heatsink (Rth j-hs) remains ≤4.8 K/W using compound. Derating is required above 125 °C ambient per datasheet transient thermal impedance curves.
Does BY459X-1500,127 have an electrically isolated mounting tab?
Yes, the BY459X-1500,127 features an electrically isolated mounting tab rated for 2500 V RMS isolation between both terminals and external heatsink at 50–60 Hz. This allows direct mechanical attachment to grounded heatsinks without insulating hardware, reducing thermal resistance and assembly complexity in horizontal deflection circuits.
What is the reverse recovery time (trr) specification for BY459X-1500,127?
The BY459X-1500,127 has a maximum reverse recovery time (trr) of 350 ns under standard test conditions (IF = 1 A, VR ≥ 30 V, Tj = 25 °C). Its soft recovery profile-confirmed by low Qs (≤3.0 µC) and controlled dV/dt-minimizes voltage overshoot and EMI in CRT horizontal output stages.
Can BY459X-1500,127 be used in place of BY459X-1500S?
No-BY459X-1500,127 and BY459X-1500S are distinct variants: the former has trr ≤ 350 ns and VF ≤ 1.30 V @ 6.5 A, while the latter offers faster trr ≤ 220 ns and higher VF ≤ 1.35 V. They are not interchangeable without circuit validation, as the S-version's steeper recovery may increase EMI in legacy designs optimized for softer switching.
What package type is used for BY459X-1500,127?
The BY459X-1500,127 uses the SOD113 package-a plastic single-ended TO-220 full-pack variant with 2 leads, isolated mounting tab, and standardized footprint per IEC 60747-5-1. Dimensions include L = 15.8 mm, W = 10.3 mm, H = 9.7 mm, and net mass of 2 g, compatible with automated through-hole insertion and manual heatsink mounting.
BY459X-1500,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1500 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 6.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 350 ns
- Current - Reverse Leakage @ Vr:
- 250 µA @ 1300 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FP
- Operating Temperature - Junction:
- 150°C (Max)
BY459X-1500,127 FAQ
1.How can I place an order for BY459X-1500,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BY459X-1500,127 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BY459X-1500,127 reliable?
The price and inventory of BY459X-1500,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BY459X-1500,127 is usually 5 days.
3.What payment methods are accepted for BY459X-1500,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BY459X-1500,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BY459X-1500,127?
BY459X-1500,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BY459X-1500,127 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BY459X-1500,127?
For technical support, including BY459X-1500,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BY459X-1500,127 requirements.
6.How does Aetrix verify that BY459X-1500,127 is sourced from the original manufacturer or authorized distributors?
All BY459X-1500,127 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BY459X-1500,127 meets industry standards.
7.What is the process for return or replacement of BY459X-1500,127?
All BY459X-1500,127 units undergo pre-shipment inspection (PSI). If there is an issue with BY459X-1500,127, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BY459X-1500,127 part is unused and in its original packaging.
Return procedure for BY459X-1500,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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