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Vishay General Semiconductor - Diodes Division BYW52-TR
- Part No.:
- BYW52-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- SOD-57, Axial
- Datasheet:
-
BYW52-TR.pdf
- Description:
- DIODE AVALANCHE 200V 2A SOD57
- Quantity:
- Payment:
- Shipping:
Inventory:1,128
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Product details
Overview
BYW52-TR from Vishay Semiconductors is a standard avalanche sinterglass axial-leaded diode in SOD-57 package, rated for 200 V repetitive peak reverse voltage (VRRM), 2 A average forward current (IF(AV)), and 50 A non-repetitive surge current (IFSM). It features glass-passivated junction, hermetic sealing, AEC-Q101 qualification, and low reverse leakage (≤1 μA at 25 °C).
For engineers reviewing the BYW52-TR datasheet, BYW52-TR pinout, BYW52-TR application, or BYW52-TR equivalent, key selection criteria include avalanche energy rating (20 mJ), thermal resistance (45 K/W with 10 mm leads), reverse recovery time (≤4000 ns), and suitability for high-surge rectification in automotive and industrial power supplies.
Technical Context
This diode employs a controlled-avalanche sinterglass structure enabling reliable energy absorption during inductive switching events. Its glass-passivated junction ensures stable reverse characteristics up to 175 °C junction temperature, while the hermetically sealed SOD-57 package maintains long-term reliability under thermal cycling and humidity stress.
The device operates with low forward voltage drop (0.9 V typical at 1 A) and ultra-low reverse current (0.1 μA typical at 25 °C, ≤10 μA at 100 °C), supporting efficient rectification in high-temperature environments. Its 1000 W pulse avalanche power rating (tp = 20 μs) and 8 A²s i²t rating confirm robustness against transient overcurrents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse blocking voltage; defines safe DC/AC peak operating limit |
| IF(AV) | 2 A - continuous average forward current at 180° conduction angle; sets thermal design baseline |
| IFSM | 50 A - non-repetitive surge current (10 ms half-sine); determines fuse/PCB trace sizing for fault events |
| trr | ≤4000 ns - reverse recovery time; impacts switching losses and EMI in flyback/inductive snubber circuits |
| ER | 20 mJ - single-pulse avalanche energy (inductive turn-off); enables use as self-protecting clamp in relay/valve drivers |
| RthJA | 45 K/W - junction-to-ambient thermal resistance (10 mm lead length); guides heatsinking and layout spacing |
| VF | 0.9 V typical at 1 A - forward voltage drop; directly affects conduction loss and thermal rise in rectifier stage |
Pinout & Package
Package: SOD-57 - axial-leaded, hermetically sealed sinterglass case with plated solderable leads per MIL-STD-750 Method 2026; cathode indicated by color band; weight ≈369 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of load or source in rectifier/clamp configuration |
| Cathode | Forward current exit / reverse blocking terminal | Marked by color band; connects to higher-potential node; absorbs avalanche energy during inductive turn-off |
Key Features
| Feature | Design Value |
|---|---|
| Controlled avalanche characteristics | Enables predictable, repeatable energy clamping without degradation-critical for relay coil suppression and solenoid drivers |
| Glass-passivated junction | Prevents moisture ingress and surface leakage drift; ensures stable IR < 1 μA over lifetime and temperature |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control modules and body electronics |
| Hermetically sealed package | Eliminates failure modes from internal corrosion or bond wire oxidation in harsh industrial environments |
| Low reverse current at 100 °C | IR ≤ 10 μA supports reliable operation in ambient temperatures up to +125 °C system-level designs |
Applications
| Automotive Relay Coil Suppression | Industrial AC-DC Input Rectification |
|---|---|
Use Scenario: Suppresses inductive kickback from 12 V/24 V automotive relays in power distribution units and lighting control modules. IC Role / Device Role / Timing Role: Avalanche-clamping diode placed reverse-biased across relay coil to absorb stored magnetic energy. Use Value: Prevents MOSFET/IC gate damage from >1 kV transients; eliminates need for external Zener or TVS due to integrated 1600 V breakdown capability. | Use Scenario: Full-wave bridge input rectifier in industrial 230 VAC SMPS front-end where surge immunity and long-term stability are critical. IC Role / Device Role / Timing Role: Discrete rectifying element handling 2 A average current with high IFSM margin for cold-start surges. Use Value: Maintains <1 μA leakage at 85 °C ambient, reducing standby power loss and improving efficiency compliance (e.g., Energy Star Level VI). |
| High-Temperature Motor Drive Clamping | Solenoid Valve Driver Protection |
Use Scenario: Clamps back-EMF in brushless DC motor phase windings operating continuously at +105 °C ambient in HVAC blowers. IC Role / Device Role / Timing Role: Fast-recovery diode in freewheeling path, leveraging 175 °C max junction rating and 45 K/W thermal resistance. Use Value: Survives 20,000+ thermal cycles without parameter shift; avoids derating required with plastic-packaged alternatives. | Use Scenario: Protects driver ICs in pneumatic solenoid valves used in factory automation systems with frequent on/off cycling. IC Role / Device Role / Timing Role: Avalanche-rated clamp across solenoid coil, absorbing 20 mJ per turn-off event without degradation. Use Value: Eliminates need for external RC snubbers; reduces BOM count and PCB area while maintaining >1 million cycle reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectification and avalanche clamping applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R02 | 200 V VRRM, 2 A IF(AV), but TO-220AC package; faster trr (≈35 ns) but no AEC-Q101 qualification | Requires heatsink mounting; unsuitable for space-constrained automotive PCBs | Preferred when ultra-fast recovery is mandatory and thermal mass is available |
| ON Semiconductor MUR220 | 200 V VRRM, 2 A IF(AV), DO-15 package; soft recovery, no avalanche rating or AEC-Q101 | Lacks controlled avalanche behavior; not validated for inductive switching stress | Acceptable only in low-energy rectification where clamping is handled separately |
Compared with STTH2R02 and MUR220, the BYW52-TR uniquely combines AEC-Q101 qualification, hermetic SOD-57 packaging, and guaranteed 20 mJ avalanche energy-making it the only choice for automotive-grade, high-reliability inductive clamping without external protection components.
Availability
BYW52-TR is available at Aetrix Electronics and suitable for automotive relay suppression, industrial AC-DC rectification, and high-temperature motor drive clamping requiring stable component supply across multi-year production programs.
Supply support for BYW52-TR 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, precision, and ruggedized performance.
The BYW52-TR belongs to Vishay's standard avalanche sinterglass diode family, engineered specifically for high-surge, high-temperature rectification and inductive load clamping in automotive and industrial systems.
FAQ
What is the maximum junction temperature rating for the BYW52-TR?
The BYW52-TR has a specified junction and storage temperature range of -55 °C to +175 °C. This allows operation in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 100 °C. The 175 °C rating is validated per AEC-Q101 stress tests and supports long-term reliability when thermal resistance (RthJA = 45 K/W) is respected in layout design. BYW52-TR must be operated within this limit to maintain its avalanche energy rating and reverse leakage specifications.
Is the BYW52-TR suitable for use in automotive applications?
Yes, the BYW52-TR is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and power distribution modules. Its hermetic SOD-57 package, controlled avalanche behavior, and operation up to 175 °C junction temperature meet stringent automotive reliability requirements. BYW52-TR is explicitly designed for inductive load suppression in 12 V/24 V systems, and its qualification includes temperature cycling, humidity bias, and mechanical shock testing per AEC standards.
What does the "-TR" suffix indicate in BYW52-TR?
"-TR" denotes tape-and-reel packaging: BYW52-TR is supplied in 10-inch reels containing 5000 units, optimized for automated SMT placement despite its axial-leaded form factor. This packaging format ensures consistent orientation (cathode band aligned), ESD-safe handling, and compatibility with pick-and-place feeders. BYW52-TR differs from BYW52-TAP (ammopack) and bare parts in logistics and assembly integration-BYW52-TR is the preferred version for high-volume production lines.
How does the BYW52-TR compare to standard silicon rectifiers in surge handling?
The BYW52-TR delivers superior surge resilience versus standard rectifiers due to its sinterglass construction and controlled avalanche capability: it sustains 50 A IFSM (10 ms half-sine) and absorbs 20 mJ per pulse without degradation. Standard rectifiers like 1N4007 lack avalanche rating and typically fail catastrophically above 30 A surge. BYW52-TR's 8 A²s i²t rating also exceeds generic diodes by >2×, making it ideal for relay/solenoid drivers where repeated inductive turn-off stresses the device. BYW52-TR is tested to maintain parameters after 1000 avalanche events.
What is the reverse recovery time (trr) specification for BYW52-TR, and how does it affect circuit design?
The BYW52-TR has a maximum reverse recovery time of 4000 ns under standard test conditions (IF = 1 A, dI/dt = 5 A/μs, VR = 50 V). While slower than ultrafast diodes, this trr is intentional-optimized for energy absorption rather than speed-to ensure stable avalanche behavior during inductive switching. Designers should account for this in snubber sizing and EMI filtering; however, its 20 mJ avalanche rating compensates for slower recovery by eliminating voltage overshoot. BYW52-TR's trr remains stable across temperature, unlike many fast-recovery diodes whose trr increases significantly above 85 °C.
BYW52-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-57, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Avalanche
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- SOD-57
- Operating Temperature - Junction:
- -55°C ~ 175°C
BYW52-TR FAQ
1.How can I place an order for BYW52-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BYW52-TR 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 BYW52-TR reliable?
The price and inventory of BYW52-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BYW52-TR is usually 5 days.
3.What payment methods are accepted for BYW52-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BYW52-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BYW52-TR?
BYW52-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BYW52-TR 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 BYW52-TR?
For technical support, including BYW52-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BYW52-TR requirements.
6.How does Aetrix verify that BYW52-TR is sourced from the original manufacturer or authorized distributors?
All BYW52-TR 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 BYW52-TR meets industry standards.
7.What is the process for return or replacement of BYW52-TR?
All BYW52-TR units undergo pre-shipment inspection (PSI). If there is an issue with BYW52-TR, 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 BYW52-TR part is unused and in its original packaging.
Return procedure for BYW52-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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