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Nexperia USA Inc. BAV21,133
- Part No.:
- BAV21,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BAV21,133.pdf
- Description:
- DIODE GEN PURP 200V 250MA ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,199
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Product details
Overview
BAV21,133 from NXP Semiconductors is a hermetically sealed glass axial-leaded switching diode in SOD27 (DO-35) package, rated for 250 V repetitive peak reverse voltage, 625 mA repetitive peak forward current, and 50 ns reverse recovery time. It serves as a high-speed rectifier or signal clamping device in video output stages, digital voltmeters, and oscilloscope front-end circuits.
For engineers reviewing the BAV21,133 datasheet, BAV21,133 pinout, BAV21,133 application, or BAV21,133 equivalent, key selection criteria include reverse recovery time under 50 ns, VRM ≥ 250 V, IF(RM) ≥ 625 mA, thermal resistance (Rth j-a = 375 K/W), and DO-35 mechanical compatibility with legacy through-hole layouts.
Technical Context
The BAV21,133 employs planar silicon technology to achieve fast switching performance with low junction capacitance (5 pF at 0 V) and controlled reverse recovery behavior. Its 50 ns trr is measured under standardized conditions (IF = IR = 30 mA, RL = 100 Ω, IR measurement at 3 mA), ensuring predictable timing in pulse-shaping and waveform clipping.
Thermal design relies on axial lead conduction: Rth j-tp = 240 K/W and Rth j-a = 375 K/W (FR4 PCB, 10 mm leads). Reverse leakage remains ≤100 nA at VR = 250 V and Tj = 25 °C, rising to ≤100 μA at 150 °C - critical for high-temperature industrial signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 250 V - maximum non-repetitive reverse voltage before avalanche breakdown; defines safe operating margin in flyback snubbers and CRT deflection circuits. |
| trr | 50 ns - reverse recovery time under defined test conditions; enables reliable operation up to ~10 MHz switching in sample-and-hold or video sync circuits. |
| IFRM | 625 mA - peak pulsed forward current capability; supports transient surge handling in power supply input rectification and relay driver protection. |
| Cd | 5 pF at 1 MHz, VR = 0 V - low junction capacitance minimizes signal distortion in RF detector and high-frequency clamp applications. |
| VF @ 100 mA | 1.0 V max - forward voltage drop determines conduction loss and self-heating in continuous-duty signal routing paths. |
| Rth j-a | 375 K/W - thermal resistance from junction to ambient on FR4 board with 10 mm leads; sets derating curve for ambient temperatures above 50 °C. |
Pinout & Package
BAV21,133 uses a hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Total length ≈ 25.4 mm, body diameter ≈ 1.85 mm, lead diameter ≈ 0.56 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; must withstand surge currents up to 9 A (1 μs) during transient events. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with black band; carries full reverse voltage (250 V) and defines clamping reference in protection networks. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid industrial environments (e.g., factory-floor test equipment). |
| 50 ns reverse recovery | Enables clean edge transitions in video sync pulse generation without ringing or overshoot in analog RGB drivers. |
| 250 V VRRM rating | Supports direct use in CRT anode supply clamping and horizontal deflection flyback circuits without external voltage dividers. |
| Low 5 pF junction capacitance | Maintains signal integrity in 10–20 MHz video bandwidth applications where stray capacitance would otherwise degrade rise/fall times. |
Applications
| Oscilloscope Vertical Amplifier Clamping | Digital Voltmeter Input Protection |
|---|---|
Use Scenario: DC restoration in high-bandwidth vertical amplifier stages to stabilize baseline during AC-coupled signal acquisition. IC Role / Device Role / Timing Role: Fast-switching clamping diode that resets capacitor voltage within 50 ns per sweep cycle. Use Value: Prevents baseline wander and amplitude compression using low-Cd (5 pF) and sub-50 ns trr to preserve >10 MHz signal fidelity. | Use Scenario: Overvoltage protection at high-impedance analog input of 6½-digit DVMs exposed to accidental 100 V transients. IC Role / Device Role / Timing Role: Transient shunt diode conducting only when input exceeds ±250 V, limiting stress on precision op-amps. Use Value: Leverages 250 V VRRM and 625 mA IFRM to absorb energy without degradation across 10⁶+ measurement cycles. |
| Colour TV Video Output Stage | Industrial Relay Driver Flyback Suppression |
Use Scenario: Sync pulse separation and blanking level stabilization in composite video output amplifiers. IC Role / Device Role / Timing Role: High-speed switching diode in series-clamp configuration to fix black level during horizontal retrace. Use Value: 50 ns trr ensures minimal ghosting or smearing on screen; 5 pF Cd avoids high-frequency attenuation in 5–7 MHz video bandwidth. | Use Scenario: Suppressing inductive kickback from 24 VDC control relays in PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling diode placed across relay coil to clamp flyback voltage spikes. Use Value: 250 V VRRM safely handles >200 V spikes; hermetic glass package ensures reliability over 100,000+ relay actuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAV20,133 | VRRM = 200 V (vs. 250 V); identical trr, Cd, package, and thermal specs | Not suitable for circuits requiring >200 V reverse standoff, e.g., CRT anode clamping | Select only if system VRM ≤ 200 V and cost sensitivity outweighs margin requirement |
| 1N4148W | VRRM = 100 V; trr = 4 ns (faster); DO-35 package; higher IF(RM) = 300 mA (non-repetitive) | Better for <10 MHz digital logic clamping; insufficient for 200+ V analog signal paths | Choose for ultrafast logic-level protection; avoid where reverse voltage exceeds 100 V |
Compared with BAV20,133 and 1N4148W, BAV21,133 uniquely balances 250 V robustness with 50 ns speed and DO-35 legacy compatibility - making it irreplaceable in mid-voltage analog video and industrial instrumentation where both voltage headroom and timing fidelity matter.
Availability
BAV21,133 is available at Aetrix Electronics and suitable for oscilloscope manufacturing, digital multimeter production, and colour television service replacement requiring stable component supply and long-lifecycle support.
Supply support for BAV21,133 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
BAV21,133 belongs to NXP's legacy discrete diode portfolio designed specifically for high-reliability analog signal conditioning and protection in test & measurement, broadcast, and industrial control equipment.
FAQ
Is BAV21,133 RoHS compliant?
Yes, BAV21,133 meets RoHS Directive 2011/65/EU requirements. NXP confirms lead-free termination and halogen-free packaging consistent with its 1999–2009 product transition timeline. Full compliance documentation is available via NXP's product change notifications archive.
What is the maximum ambient temperature for continuous operation at 250 mA?
At 250 mA continuous forward current, the maximum ambient temperature is 50 °C on FR4 PCB with 10 mm leads. This derives from Ptot = 400 mW and Rth j-a = 375 K/W: Tj = Tamb + (P × Rth) = 50 + (0.25 × 0.4 × 375) ≈ 175 °C - matching the absolute max Tj rating.
Can BAV21,133 replace 1N4007 in power rectification?
No. BAV21,133 is a fast switching diode (50 ns trr, 625 mA IFRM), not a general-purpose rectifier. The 1N4007 has 1 A average current and 1000 V PIV but 2–5 μs trr. Substituting BAV21,133 risks thermal failure and inadequate voltage blocking in AC/DC bridge applications.
Does the cathode band orientation affect PCB layout?
Yes. The black cathode band must align with the PCB silkscreen polarity mark. Incorrect orientation causes reverse conduction in clamping circuits and may expose downstream ICs to unclamped transients. Mechanical fit in DO-35 footprints assumes 25.4 mm lead spacing and axial symmetry - no rotation tolerance.
BAV21,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 200 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
- Operating Temperature - Junction:
- 175°C (Max)
BAV21,133 FAQ
1.How can I place an order for BAV21,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAV21,133 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 BAV21,133 reliable?
The price and inventory of BAV21,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAV21,133 is usually 5 days.
3.What payment methods are accepted for BAV21,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAV21,133?
BAV21,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAV21,133 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 BAV21,133?
For technical support, including BAV21,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21,133 requirements.
6.How does Aetrix verify that BAV21,133 is sourced from the original manufacturer or authorized distributors?
All BAV21,133 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 BAV21,133 meets industry standards.
7.What is the process for return or replacement of BAV21,133?
All BAV21,133 units undergo pre-shipment inspection (PSI). If there is an issue with BAV21,133, 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 BAV21,133 part is unused and in its original packaging.
Return procedure for BAV21,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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