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NXP Semiconductors BY329X-1500S,127
- Part No.:
- BY329X-1500S,127
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
BY329X-1500S,127.pdf
- Description:
- DIODE GEN PURP 1.5KV 6A TO220FP
- Quantity:
- Payment:
- Shipping:
Inventory:6,244
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Product details
Overview
BY329X-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 frequency, 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 BY329X-1500S,127 datasheet, BY329X-1500S,127 pinout, BY329X-1500S,127 application, or BY329X-1500S,127 equivalent, key selection criteria include VRRM = 1500 V, trr ≤ 230 ns (160 ns typical for -1500S variant), VF ≤ 1.6 V at 6.5 A/25 °C, isolated heatsink capability (Visol = 2500 V RMS), and SOD113 mechanical compatibility with F-pack mounting.
Technical Context
This damper diode operates in high-frequency flyback energy recirculation paths-specifically horizontal deflection stages-where rapid turn-off, low reverse recovery charge (Qs ≤ 0.95 µC), and controlled forward recovery voltage (Vfr ≤ 40 V) prevent transistor overvoltage stress. Its glass-passivated double-diffused junction ensures stable performance under thermal cycling.
The isolated mounting tab enables direct heatsink attachment without electrical shorting, supporting thermal resistance Rth j-hs of 4.8 K/W (with compound). Soft recovery minimizes EMI generation during commutation, critical in analog video timing-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1500 V - Maximum repetitive reverse blocking voltage; defines safe operating ceiling in flyback snubber networks |
| trr (max) | 230 ns - Limits switching loss and voltage overshoot during transistor turn-on in horizontal deflection circuits |
| VF (max) | 1.6 V @ 6.5 A, 25 °C - Directly impacts conduction loss and thermal load in high-duty-cycle damper operation |
| IF(peak) | 6 A @ 70 kHz - Specifies usable current envelope for high-frequency CRT line scan repetition rates |
| Visol | 2500 V RMS - Enables safe, galvanically isolated heatsink mounting per IEC 60065 safety requirements |
| Qs (max) | 0.95 µC - Low stored charge reduces diode-induced voltage spikes across line output transistors |
| Rth j-hs | 4.8 K/W (with compound) - Determines maximum power dissipation (≈3.1 W at ΔT = 15 K) when heatsink-mounted |
Pinout & Package
Package: SOD113 - axial-leaded, glass-passivated, isolated-tab package with 2 g mass; seating plane electrically isolated from terminals; compliant with UL94 V0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input to damper path | Connects to collector of horizontal output transistor; carries flyback current during retrace |
| 2 (Cathode) | Output to ground return | Routes recovered energy to primary winding return; referenced to circuit common |
| Tab (Isolated) | Thermal interface only | Electrically isolated mounting surface for heatsink attachment; no circuit connection |
Key Features
| Feature | Design Value |
|---|---|
| Soft recovery characteristic | Reduces EMI and voltage ringing during commutation-critical for FCC-compliant CRT video systems |
| Isolated mounting tab | Enables direct heatsink coupling without insulation washers, simplifying mechanical design and improving thermal reliability |
| Low VF (≤1.6 V) | Lowers conduction losses in high-current, high-duty-cycle damper operation, reducing junction temperature rise |
| High thermal cycling performance | Validated for repeated on/off thermal stress in consumer display equipment with 15–30 year field life expectations |
| Fast trr (≤230 ns) | Ensures clean turn-off before next horizontal scan pulse, preventing transistor secondary breakdown |
Applications
| TV Horizontal Deflection | PC Monitor Flyback |
|---|---|
Use Scenario: Horizontal output 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 across line output transistor during retrace interval. Use Value: Prevents transistor avalanche failure by absorbing stored inductive energy with soft, low-Qs recovery. | Use Scenario: High-resolution PC monitor deflection circuit running at 31.5 kHz or higher line frequencies. IC Role / Device Role / Timing Role: Fast-recovery damper in resonant flyback network to manage increased switching stress. Use Value: Enables stable operation up to 70 kHz peak current with trr ≤ 230 ns and Vfr ≤ 40 V limiting transistor overvoltage. |
| Legacy Display Power Supply | Industrial CRT Instrumentation |
Use Scenario: Secondary-side snubber in offline SMPS derived from CRT horizontal deflection transformer. IC Role / Device Role / Timing Role: High-voltage clamp diode dissipating leakage inductance energy during MOSFET/FET turn-off. Use Value: Isolated tab allows direct heatsinking in compact enclosures; 1500 V VRRM supports ≥265 VAC input designs. | Use Scenario: Oscilloscope or medical imaging CRT driver requiring long-term reliability and low parameter drift. IC Role / Device Role / Timing Role: Precision damper maintaining consistent retrace timing and waveform fidelity over temperature. Use Value: Stable trr and VF across -40 °C to +125 °C junction range ensure repeatable horizontal sweep calibration. |
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 | Higher max trr (230 ns vs. 160 ns typ), higher VF (1.45 V vs. 1.35 V typ @ 6.5 A/25 °C), no "S" suffix designation | Same SOD113 package and pinout; used in lower-frequency CRT designs (≤50 kHz) | Select BY329-1500 only if soft recovery priority is lower and cost sensitivity outweighs trr/VF optimization |
| BY459X-1500 | Higher IFSM (100 A vs. 75 A), same VRRM, slightly slower trr (250 ns max), non-isolated tab | Requires insulated mounting hardware; suited for non-heatsinked or lower-power deflection stages | Choose BY459X-1500 only when higher surge rating is required and isolated-tab mounting is not mandatory |
Compared with BY329-1500 and BY459X-1500, the BY329X-1500S,127 delivers superior soft recovery (160 ns typ trr, 0.95 µC Qs) and guaranteed isolated tab-making it optimal for thermally demanding, high-frequency CRT deflection where EMI control and heatsink integration are critical.
Availability
BY329X-1500S,127 is available at Aetrix Electronics and suitable for CRT television repair, legacy monitor refurbishment, and industrial instrumentation requiring stable component supply with long-lifecycle support.
Supply support for BY329X-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 focused on secure connectivity solutions, automotive electronics, and high-reliability analog components.
The BY329X series was developed by Philips (now NXP) specifically for horizontal deflection damper applications in analog CRT displays, emphasizing thermal robustness, isolation safety, and fast soft-recovery performance.
FAQ
What is the peak repetitive reverse voltage rating for BY329X-1500S,127?
The BY329X-1500S,127 has a peak repetitive reverse voltage (VRRM) rating of 1500 V. This value is confirmed in the Philips product specification under Limiting Values and applies directly to the BY329X-1500S variant. It defines the maximum sustained reverse voltage the diode can block repeatedly without breakdown in horizontal deflection circuits.
Does BY329X-1500S,127 have an electrically isolated mounting tab?
Yes, the BY329X-1500S,127 features an electrically isolated mounting tab, verified in the Isolation Limiting Value section of the datasheet: Visol = 2500 V RMS between both terminals and external heatsink. This isolation is inherent to the SOD113 package construction and enables direct, safe heatsink attachment without additional insulation.
What is the maximum reverse recovery time (trr) specified for BY329X-1500S,127?
The maximum reverse recovery time (trr) for BY329X-1500S,127 is 230 ns, as stated in the DYNAMIC CHARACTERISTICS table under MAX for the 1500S column. The typical value is 160 ns at IF = 1 A, VR ≥ 30 V, and dIF/dt = 50 A/µs-critical for minimizing switching stress in high-frequency CRT deflection.
Can BY329X-1500S,127 be used as a direct replacement for BY329-1500 in existing designs?
BY329X-1500S,127 shares the same SOD113 package, pinout, and VRRM rating as BY329-1500, but offers improved soft recovery (160 ns vs. 230 ns max trr) and lower VF. It is functionally compatible and often preferred-but verify thermal layout, as its optimized recovery may alter snubber energy distribution in legacy designs.
What is the forward voltage drop of BY329X-1500S,127 at 6.5 A and 25 °C?
The forward voltage drop (VF) of BY329X-1500S,127 is 1.3 V (typical) and 1.5 V (maximum) at IF = 6.5 A and Tj = 25 °C, per the STATIC CHARACTERISTICS table. At elevated junction temperature (125 °C), VF rises to 1.35 V (max), confirming stable conduction behavior across operating range.
BY329X-1500S,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):
- 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-220FP
- Operating Temperature - Junction:
- 150°C (Max)
BY329X-1500S,127 FAQ
1.How can I place an order for BY329X-1500S,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BY329X-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 BY329X-1500S,127 reliable?
The price and inventory of BY329X-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 BY329X-1500S,127 is usually 5 days.
3.What payment methods are accepted for BY329X-1500S,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BY329X-1500S,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BY329X-1500S,127?
BY329X-1500S,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BY329X-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 BY329X-1500S,127?
For technical support, including BY329X-1500S,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BY329X-1500S,127 requirements.
6.How does Aetrix verify that BY329X-1500S,127 is sourced from the original manufacturer or authorized distributors?
All BY329X-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 BY329X-1500S,127 meets industry standards.
7.What is the process for return or replacement of BY329X-1500S,127?
All BY329X-1500S,127 units undergo pre-shipment inspection (PSI). If there is an issue with BY329X-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 BY329X-1500S,127 part is unused and in its original packaging.
Return procedure for BY329X-1500S,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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