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NXP Semiconductors BY329-1500S,127
- Part No.:
- BY329-1500S,127
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
BY329-1500S,127.pdf
- Description:
- DIODE GEN PURP 1.5KV 6A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,378
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Product details
Overview
BY329-1500S,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), 6 A peak forward current at 70 kHz switching, and 230 ns maximum reverse recovery time (trr). It features soft recovery, isolated mounting tab, and is designed for horizontal deflection circuits in CRT TV receivers and PC monitors.
For engineers reviewing the BY329-1500S,127 datasheet, BY329-1500S,127 pinout, BY329-1500S,127 application, or BY329-1500S,127 equivalent, key selection criteria include VRRM = 1500 V, trr ≤ 230 ns (160 ns typical), VF ≤ 1.6 V @ 6.5 A, isolated heatsink capability (Visol = 2500 V RMS), and SOD113 mechanical compatibility with F-pack mounting.
Technical Context
This damper diode operates in resonant flyback switching topologies where rapid turn-off and controlled reverse recovery minimize voltage overshoot and EMI. Its soft recovery characteristic-evidenced by low Qs (0.95 µC max) and controlled dV/dt during commutation-reduces stress on line output transistors in CRT horizontal deflection stages.
The isolated mounting tab enables direct heatsink attachment without electrical isolation hardware, while thermal resistance Rth j-hs is 4.8 K/W with compound, supporting continuous operation at Tj ≤ 150 °C under pulsed IF(peak) = 6 A conditions at 70 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1500 V - Withstands repetitive reverse voltage up to 1500 V in CRT deflection flyback circuits |
| trr (max) | 230 ns - Ensures fast turn-off with minimal tail current in 15–70 kHz horizontal scan frequencies |
| VF (max) | 1.6 V @ 6.5 A - Limits conduction loss and junction heating during peak current pulses |
| IF(peak) | 6 A @ 70 kHz - Supports high-frequency deflection operation without thermal runaway |
| Visol | 2500 V RMS - Enables safe, direct mounting to grounded heatsinks in high-voltage CRT systems |
| Qs (max) | 0.95 µC - Low stored charge reduces switching losses and voltage spikes across line transistor |
| Rth j-hs | 4.8 K/W - Allows effective heat transfer to heatsink using thermal compound, critical for 150 °C max Tj |
Pinout & Package
Package: SOD113 (glass-passivated, axial-leaded, isolated-tab F-pack envelope); net mass 2 g; seating plane electrically isolated from terminals per Fig.8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input terminal for forward conduction path | Connects to collector of line output transistor in horizontal deflection circuit; carries pulsed IF(peak) |
| 2 (Cathode) | Output terminal for forward conduction path | Connects to primary winding of line output transformer; defines reference for reverse recovery waveform |
| Tab (Isolated) | Thermal interface / mechanical mount | Electrically isolated heatsink attachment point; rated for 2500 V RMS isolation from both terminals |
Key Features
| Feature | Design Value |
|---|---|
| Soft recovery characteristic | Low Qs (0.95 µC max) and controlled trr slope reduce voltage overshoot and EMI in flyback snubbing |
| Isolated mounting tab | Enables direct heatsink coupling without insulating washers-simplifies mechanical design and improves thermal reliability |
| High thermal cycling performance | Validated for repeated IF(peak) = 6 A pulses at 70 kHz, supporting long-life CRT monitor operation |
| Low forward voltage drop | VF ≤ 1.6 V @ 6.5 A minimizes power dissipation and junction temperature rise under load |
Applications
| TV Receiver Horizontal Deflection | PC Monitor Flyback Circuit |
|---|---|
Use Scenario: High-frequency resonant flyback stage in analog CRT television sets operating at 15.625 kHz line frequency. IC Role / Device Role / Timing Role: Damper diode clamping flyback voltage spike and absorbing energy from line output transformer leakage inductance. Use Value: Soft recovery and 230 ns trr limit voltage overshoot across line transistor, extending device lifetime and reducing EMI filter burden. | Use Scenario: Horizontal deflection circuit in VGA-resolution PC monitors running at 31.5 kHz line frequency. IC Role / Device Role / Timing Role: Fast-recovery damper providing energy recirculation path during transistor turn-off in self-oscillating flyback topology. Use Value: Isolated tab allows direct heatsink mounting in compact chassis; 2500 V RMS isolation ensures safety compliance in Class I mains-connected designs. |
| High-Voltage Pulse Clamping | Industrial CRT-Based Test Equipment |
Use Scenario: Transient suppression in high-voltage pulse generators where fast turn-off and low stored charge are critical. IC Role / Device Role / Timing Role: Snubber diode absorbing inductive kickback from pulse transformers or relay drivers. Use Value: 75 A non-repetitive surge rating (IFSM) and 1500 V VRRM support robust protection against 10 ms overcurrent events. | Use Scenario: Oscilloscope and signal generator front-end CRT driver stages requiring stable, low-noise deflection timing. IC Role / Device Role / Timing Role: Precision damper maintaining consistent flyback waveform shape across temperature and aging. Use Value: Tight VF tolerance (1.35 V/1.5 V max) and stable trr ensure repeatable horizontal sweep linearity and geometry stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar damper diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BY329-1500,127 | Higher VF (1.45 V max @ 6.5 A) and slower trr (230 ns max vs. 160 ns for -1500S); same VRRM, package, and isolation | Less suitable for 70 kHz+ deflection; higher conduction loss in thermally constrained layouts | Select when cost sensitivity outweighs speed/efficiency requirements in 15–31 kHz applications |
| BY459-1500,118 | Higher IFSM (100 A), same VRRM and SOD113 package, but no isolated tab (non-isolated heatsink mounting) | Requires external insulation for heatsink mounting; not drop-in for isolated-tab designs | Choose only if mechanical redesign accommodates non-isolated mounting and higher surge immunity is prioritized |
Compared with BY329-1500,127 and BY459-1500,118, the BY329-1500S,127 delivers superior switching speed (160 ns trr typ), lower VF (1.3 V typ), and guaranteed isolated-tab construction-making it the optimal choice for space-constrained, high-reliability CRT deflection circuits requiring direct heatsink coupling and low EMI.
Availability
BY329-1500S,127 is available at Aetrix Electronics and suitable for CRT television receivers, PC monitor deflection systems, and industrial high-voltage pulse clamping applications requiring stable component supply and long-lifecycle support.
Supply support for BY329-1500S,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 leader delivering high-performance analog, logic, and discrete solutions for automotive, industrial, and consumer electronics.
The BY329X series was developed by Philips (now NXP) specifically for horizontal deflection damper applications in CRT-based video equipment, emphasizing soft recovery, high-voltage ruggedness, and thermal reliability.
FAQ
What is the maximum reverse recovery time (trr) specification for BY329-1500S,127?
The maximum reverse recovery time for BY329-1500S,127 is 230 ns under test conditions of IF = 1 A, VR ≥ 30 V, and dIF/dt = 50 A/µs at Tj = 25 °C. The typical value is 160 ns, reflecting its optimized soft-recovery behavior for CRT deflection use.
Does BY329-1500S,127 have an electrically isolated mounting tab?
Yes, BY329-1500S,127 features an electrically isolated mounting tab rated for 2500 V RMS isolation between the tab and both terminals (anode and cathode), enabling safe direct attachment to grounded heatsinks in high-voltage CRT systems.
What is the peak forward current rating for BY329-1500S,127 at 70 kHz switching frequency?
BY329-1500S,127 is rated for IF(peak) = 6 A at 70 kHz, as specified in the Philips product specification. This rating assumes proper heatsinking and accounts for thermal cycling performance validated for CRT horizontal deflection duty cycles.
How does BY329-1500S,127 differ from BY329-1500,127 in forward voltage performance?
At IF = 6.5 A and Tj = 25 °C, BY329-1500S,127 has a maximum VF of 1.5 V, while BY329-1500,127 is rated at 1.45 V max. At elevated temperature (Tj = 125 °C), BY329-1500S,127 maintains VF ≤ 1.5 V versus 1.35 V for the non-S variant-indicating tighter high-temp VF control in the -1500S version.
What package type is used for BY329-1500S,127 and what are its key mechanical features?
BY329-1500S,127 uses the SOD113 package-a glass-passivated, axial-leaded F-pack with electrically isolated seating plane. Key features include 15.8 mm max body length, 10.3 mm max height, 2.54 mm lead spacing, and recessed mounting holes for secure heatsink attachment per Philips mechanical drawing Fig.8.
BY329-1500S,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1500 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 1.6 V @ 6.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 160 ns
- Current - Reverse Leakage @ Vr:
- 250 µA @ 1300 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- 150°C (Max)
BY329-1500S,127 FAQ
1.How can I place an order for BY329-1500S,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BY329-1500S,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 BY329-1500S,127 reliable?
The price and inventory of BY329-1500S,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BY329-1500S,127 is usually 5 days.
3.What payment methods are accepted for BY329-1500S,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BY329-1500S,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BY329-1500S,127?
BY329-1500S,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BY329-1500S,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 BY329-1500S,127?
For technical support, including BY329-1500S,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BY329-1500S,127 requirements.
6.How does Aetrix verify that BY329-1500S,127 is sourced from the original manufacturer or authorized distributors?
All BY329-1500S,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 BY329-1500S,127 meets industry standards.
7.What is the process for return or replacement of BY329-1500S,127?
All BY329-1500S,127 units undergo pre-shipment inspection (PSI). If there is an issue with BY329-1500S,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 BY329-1500S,127 part is unused and in its original packaging.
Return procedure for BY329-1500S,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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