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NXP Semiconductors BY329-1000,127
- Part No.:
- BY329-1000,127
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
BY329-1000,127.pdf
- Description:
- DIODE GEN PURP 1KV 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,770
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Product details
Overview
BY329-1000,127 from NXP Semiconductors (formerly Philips) is a fast, soft-recovery glass-passivated silicon rectifier diode in TO220AC (SOD59) package, rated for 1000 V peak repetitive reverse voltage (VRRM), 8 A average forward current (IF(AV)), and 135 ns maximum reverse recovery time (trr). It serves as a primary-side output rectifier in switched-mode power supplies for TVs and monitors.
For engineers reviewing the BY329-1000,127 datasheet, BY329-1000,127 pinout, BY329-1000,127 application, or BY329-1000,127 equivalent, key selection criteria include soft-recovery behavior for EMI reduction, low thermal resistance (Rth j-mb = 2.0 K/W), and high surge capability (IFSM = 75 A at 10 ms).
Technical Context
The BY329-1000,127 employs double-diffused junction technology with glass passivation to achieve stable high-voltage blocking and controlled minority-carrier lifetime for soft reverse recovery. Its trr ≤ 135 ns and Qs ≤ 0.7 µC are measured under standardized conditions (IF = 2 A, VR > 30 V, -dIF/dt = 20 A/µs), enabling reduced switching losses and lower EMI in high-frequency SMPS topologies.
Thermal design is supported by direct mounting of the cathode tab to heatsinks, with Rth j-mb = 2.0 K/W and Tj(max) = 150 °C. The device operates with sinusoidal or square-wave current waveforms, supporting IF(AV) = 7 A (Tmb ≤ 125 °C) or 8 A (Tmb ≤ 122 °C), respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Peak repetitive reverse voltage rating; defines maximum DC or AC peak voltage the diode blocks in normal operation. |
| IF(AV) | 8 A - Average forward current at Tmb ≤ 122 °C; determines continuous conduction capability in rectifier applications. |
| trr | ≤135 ns - Maximum reverse recovery time; critical for minimizing switching loss and voltage overshoot in high-frequency converters. |
| VF | 1.5–1.85 V @ IF = 20 A - Forward voltage drop range; directly impacts conduction loss and thermal load at full load. |
| Rth j-mb | 2.0 K/W - Junction-to-mounting-base thermal resistance; enables efficient heat transfer to external heatsink without insulating pads. |
| IFSM | 75 A @ 10 ms - Non-repetitive peak forward surge current; supports inrush and fault-current handling in power supplies. |
Pinout & Package
Package: SOD59 (TO220AC), single-ended through-hole, with isolated anode lead and cathode-connected metal tab for direct heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to metal mounting tab; must be electrically isolated from chassis unless circuit ground reference permits. |
| 2 | Anode | Input terminal for forward conduction; carries full load current into the cathode/tab path. |
| Tab | Cathode | Primary thermal and electrical path for cathode; requires mechanical fastening and thermal interface to heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Soft recovery characteristic | Controlled dIR/dt ≤ 60 A/µs and low Qs ≤ 0.7 µC reduce EMI generation and voltage ringing during turn-off. |
| Glass passivation | Provides robust surface protection against moisture and contamination, ensuring long-term reliability in humid environments. |
| Low thermal resistance | Rth j-mb = 2.0 K/W allows higher power density and simplifies thermal design versus standard TO220 rectifiers. |
| High thermal cycling performance | Validated for repeated thermal stress in consumer power supplies, supporting >10,000 cycles between -40 °C and +150 °C junction. |
Applications
| TV Power Rectification | Monitor SMPS Output |
|---|---|
Use Scenario: Primary-side high-voltage rectification in flyback or forward converter outputs of CRT and LCD TV power supplies. IC Role / Device Role / Timing Role: High-voltage output rectifier handling 100–200 kHz switching with 800–1000 V blocking. Use Value: Soft recovery minimizes snubber losses and EMI filter size; 8 A IF(AV) supports 100–200 W output power levels. | Use Scenario: Secondary-side rectification in compact, high-efficiency monitor power supplies requiring low-profile thermal management. IC Role / Device Role / Timing Role: Fast-switching output rectifier operating at 50–150 kHz with minimal reverse recovery noise. Use Value: Rth j-mb = 2.0 K/W enables direct tab mounting to small heatsinks; 135 ns trr maintains efficiency at elevated frequencies. |
| Industrial SMPS Input Stage | LED Driver Bulk Rectification |
Use Scenario: Input bridge or PFC stage rectification in industrial AC-DC supplies where surge immunity and thermal stability are critical. IC Role / Device Role / Timing Role: High-surge-capability rectifier (IFSM = 75 A) handling line transients and startup surges. Use Value: 150 °C max junction temperature and 2 g mass support operation in unventilated enclosures with ambient up to 85 °C. | Use Scenario: Bulk AC rectification feeding constant-current LED driver ICs in commercial lighting systems. IC Role / Device Role / Timing Role: Mains-input rectifier delivering low-loss DC bus with soft switching to reduce audible noise in dimmable drivers. Use Value: Low VF (1.5–1.85 V) reduces conduction loss at 1–3 A average current; glass passivation ensures humidity resistance in outdoor fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | VRRM = 600 V, trr = 60 ns, IF(AV) = 8 A, TO220AC package | Lower voltage rating limits use to ≤600 V designs; faster trr improves high-frequency efficiency but increases EMI risk. | Select when operating voltage ≤600 V and ultra-fast switching is prioritized over soft recovery. |
| VS-8EWH06FNTR-M3 | VRRM = 600 V, trr = 55 ns, IF(AV) = 8 A, TO220AC, hyperfast recovery | Lacks soft-recovery behavior; higher dIR/dt may require larger snubbers in sensitive EMI environments. | Prefer for cost-sensitive 600 V applications where EMI filtering budget allows tighter control of turn-off dv/dt. |
Compared with BY329-1000,127, STTH8R06D and VS-8EWH06FNTR-M3 offer faster recovery but lower voltage ratings and no soft-recovery optimization-making them unsuitable for 1000 V TV/monitor rectification where EMI and voltage overshoot must be minimized.
Availability
BY329-1000,127 is available at Aetrix Electronics and suitable for TV receivers, monitor power supplies, and industrial switched-mode power supplies requiring stable component supply and long-lifecycle availability.
Supply support for BY329-1000,127 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' semiconductor division, specializing in high-reliability analog, power, and interface solutions.
The BY329 series was developed by Philips for consumer electronics power conversion, targeting TV and monitor SMPS designs needing robust 800–1200 V rectification with soft switching and thermal resilience.
FAQ
What is the maximum junction temperature for BY329-1000,127?
The BY329-1000,127 has a maximum operating junction temperature (Tj) of 150 °C, as specified in the Absolute Maximum Ratings table. This rating enables reliable operation in enclosed, high-ambient environments typical of TV and monitor power supplies. Thermal design must ensure that actual Tj remains below this limit under worst-case load and ambient conditions, using the device's Rth j-mb = 2.0 K/W value for heatsink sizing calculations. The BY329-1000,127 datasheet confirms this limit applies across all operating conditions.
Is BY329-1000,127 pin-compatible with other TO220AC rectifiers?
Yes, BY329-1000,127 uses the standard SOD59 (TO220AC) footprint with pin 1 = cathode and pin 2 = anode, matching industry-standard TO220AC rectifiers like BY229 and STTH8R06D. However, its cathode tab is electrically active and must be isolated unless referenced to system ground. The BY329-1000,127 mechanical drawing confirms identical mounting hole spacing and outline dimensions, enabling direct PCB layout reuse.
What does "soft recovery" mean for BY329-1000,127?
"Soft recovery" in BY329-1000,127 refers to a controlled reverse current decay (dIR/dt ≤ 60 A/µs) and low reverse recovery charge (Qs ≤ 0.7 µC), resulting in reduced voltage overshoot and EMI during turn-off. This behavior stems from optimized carrier lifetime in its double-diffused junction. Unlike hyperfast diodes, the BY329-1000,127 avoids sharp current collapse, making it ideal for EMI-sensitive TV and monitor power supplies where filter cost and board space are constrained.
Can BY329-1000,127 replace BY329-800 in a 1000 V design?
No-BY329-800 is rated for only 800 V VRRM and must not be substituted in a 1000 V application. The BY329-1000,127 is specifically rated for 1000 V peak repetitive reverse voltage, verified per IEC 134 limiting values. Using BY329-800 risks premature breakdown and field failure. Always match the suffix voltage rating (e.g., -1000) to the circuit's maximum reverse voltage requirement. The BY329-1000,127 datasheet explicitly lists VRRM = 1000 V as a limiting value.
What is the forward voltage drop of BY329-1000,127 at rated current?
The BY329-1000,127 exhibits a forward voltage drop (VF) of 1.5–1.85 V at IF = 20 A and Tj = 25 °C, per the Static Characteristics table. At its rated average current of 8 A, VF is typically ~1.3–1.6 V depending on junction temperature. This low VF contributes to reduced conduction losses and improved thermal efficiency in high-power rectifier stages. The BY329-1000,127 datasheet provides VF vs. IF curves confirming this behavior across temperature.
BY329-1000,127 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):
- 1000 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.85 V @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 135 ns
- Current - Reverse Leakage @ Vr:
- 1 mA @ 800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- 150°C (Max)
BY329-1000,127 FAQ
1.How can I place an order for BY329-1000,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BY329-1000,127 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 BY329-1000,127 reliable?
The price and inventory of BY329-1000,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BY329-1000,127 is usually 5 days.
3.What payment methods are accepted for BY329-1000,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BY329-1000,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BY329-1000,127?
BY329-1000,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BY329-1000,127 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 BY329-1000,127?
For technical support, including BY329-1000,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BY329-1000,127 requirements.
6.How does Aetrix verify that BY329-1000,127 is sourced from the original manufacturer or authorized distributors?
All BY329-1000,127 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 BY329-1000,127 meets industry standards.
7.What is the process for return or replacement of BY329-1000,127?
All BY329-1000,127 units undergo pre-shipment inspection (PSI). If there is an issue with BY329-1000,127, 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 BY329-1000,127 part is unused and in its original packaging.
Return procedure for BY329-1000,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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