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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Nexperia USA Inc. BAS21THVL

Name: BAS21THVL
Brand: Nexperia USA Inc.
SKU: BAS21THVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAS21THVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BAS21THVL.pdf

Description:: DIODE GP 200V 200MA TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:9,905

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Product details

Overview

BAS21THVL from Nexperia is a high-voltage switching diode in SOT23 package, rated for 250 V repetitive peak reverse voltage (V_RRM), 200 mA forward current (I_F), and 50 ns reverse recovery time (t_rr). It operates up to 175 °C junction temperature and serves as a fast, high-temperature–capable switching element in DC-DC converter flyback snubbers and industrial power supply clamp circuits.

For engineers reviewing the BAS21THVL datasheet, BAS21THVL pinout, BAS21THVL application, or BAS21THVL equivalent, key selection criteria include verified V_RRM = 250 V, t_rr ≤ 50 ns, thermal resistance R_th(j-a) = 500 K/W on FR4, and confirmed 2-pin active + 1-pin NC configuration in SOT23.

Technical Context

The BAS21THVL implements a planar epitaxial silicon switching diode structure optimized for high-voltage transient suppression and fast turn-off. Its 50 ns t_rr is measured under standardized conditions (I_F = I_R = 30 mA, R_L = 100 Ω, I_R(meas) = 3 mA), ensuring consistent switching behavior in pulse-width modulated topologies.

Thermal design relies on its 175 °C maximum junction temperature and defined R_th(j-sp) = 330 K/W to cathode solder point, enabling reliable operation in thermally constrained industrial PCB layouts with single-side copper FR4 footprints.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	250 V - supports clamping of 200 V DC bus transients with 20 % margin in industrial SMPS
t_rr	50 ns - enables stable operation up to ~2 MHz switching frequency without excessive switching loss
I_F	200 mA continuous - sufficient for auxiliary bias winding rectification in sub-10 W offline converters
V_F	1.25 V @ 200 mA - contributes ≤250 mW conduction loss at full rated current
I_R	100 nA @ 200 V - ensures negligible leakage in high-impedance hold-up or sensing paths
C_d	5 pF @ 0 V - minimizes capacitive loading on high-speed gate-drive or timing nodes
R_th(j-a)	500 K/W - defines thermal derating slope: P_tot drops to 150 mW at T_amb = 55 °C

Pinout & Package

Package: SOT23 (TO-236AB), 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, FR4-compatible footprint per Fig. 10 and Fig. 11.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward current entry point; connects to switched high-side node in clamp or snubber
2	No Connection (n.c.)	Internally unconnected; must remain floating-no PCB trace or thermal pad required
3	Cathode (K)	Current return path; ties to ground or low-side switch node; primary thermal path to PCB

Key Features

Feature	Design Value
High-temperature operation	Junction rated to 175 °C-enables use in sealed enclosures or near heat sources without derating
Fast reverse recovery	t_rr ≤ 50 ns ensures minimal tail current during hard-switching, reducing EMI and loss
Low leakage current	I_R = 100 nA @ 200 V preserves signal integrity in high-impedance sample-and-hold or reference circuits
Small SMD footprint	SOT23 package saves >60 % board area vs. DO-35, easing layout in space-constrained power modules
Robust surge rating	I_FSM = 1.7 A @ 10 ms allows tolerance of brief inrush or fault currents in protection circuits

Applications

Switch-Mode Power Supply Clamp

Industrial Sensor Signal Conditioning

Use Scenario: Clamping voltage spikes across MOSFET drains in flyback and forward converters operating from 100–250 V AC mains.

IC Role / Device Role / Timing Role: High-voltage switching diode providing fast, low-loss energy recirculation during MOSFET turn-off.

Use Value: Prevents MOSFET avalanche failure by limiting V_DS to ≤250 V with <50 ns response, reducing system-level overvoltage risk.

Use Scenario: Protecting analog front-end inputs of PLC I/O modules against field-wiring transients up to ±200 V.

IC Role / Device Role / Timing Role: Bidirectional transient suppressor used in series with precision op-amp inputs.

Use Value: Blocks >99.9 % of 200 V transients while adding only 5 pF capacitance and no DC offset error.

Automated Test Equipment (ATE) Signal Routing

High-Temperature Motor Control Feedback

Use Scenario: Isolating measurement channels in semiconductor parametric testers where channel crosstalk must be minimized below −60 dB.

IC Role / Device Role / Timing Role: Fast-switching isolation diode in multiplexer signal path with sub-50 ns transition.

Use Value: Enables 2 MHz channel switching without measurable charge injection or settling delay due to low C_d and t_rr.

Use Scenario: Rectifying Hall-effect sensor outputs in oil-filled motor housings where ambient temperatures reach 150 °C.

IC Role / Device Role / Timing Role: Temperature-stable rectifier converting bipolar sensor pulses into unidirectional logic-level signals.

Use Value: Maintains <100 nA leakage and <1.25 V V_F across full −40 °C to +150 °C range, preserving signal fidelity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage switching diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBD2103LT1G	V_RRM = 200 V (50 V lower); t_rr = 50 ns; same SOT23 package and pinout	Not suitable for 200–250 V clamping; acceptable for ≤180 V DC bus protection	Select only if system max reverse voltage is ≤200 V and thermal margin permits higher I_R at elevated T_j
Diodes Incorporated BAV21W-7-F	V_RRM = 250 V; t_rr = 50 ns; SOD-123 package (larger, 2.7 mm × 1.6 mm)	Requires PCB redesign; offers higher P_tot (410 mW) but lacks 175 °C rating (max T_j = 150 °C)	Choose when board space allows larger package and higher continuous power dissipation is needed

Compared with MMBD2103LT1G and BAV21W-7-F, BAS21THVL uniquely combines 250 V V_RRM, 50 ns t_rr, 175 °C T_j, and SOT23 size-making it the only option for compact, high-temperature, high-voltage switching where all three parameters are simultaneously required.

Availability

BAS21THVL is available at Aetrix Electronics and suitable for industrial power supplies, motor control feedback circuits, and high-temperature sensor interfaces requiring stable component supply with guaranteed long-term continuity.

Supply support for BAS21THVL 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The BAS21THVL belongs to Nexperia's high-voltage switching diode product line, engineered specifically for robust transient suppression and fast switching in industrial and automotive-adjacent power systems.

FAQ

Is BAS21THVL automotive-qualified?

No. Per Nexperia's revision history (Table 8), BAS21THVL is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia recommends the -Q qualified variant BAS21TH-Q, which undergoes extended temperature cycling and humidity testing.

What is the thermal resistance to ambient for BAS21THVL on standard FR4?

R_th(j-a) is 500 K/W when mounted on an FR4 PCB with single-side copper, tin-plated, and standard SOT23 footprint (per Table 6). This value assumes no additional thermal vias or copper pour; adding two 0.3 mm thermal vias under the cathode pad reduces R_th(j-a) to ~320 K/W.

Can Pin 2 (n.c.) be grounded or left floating?

Pin 2 is internally not connected and must remain electrically floating-no PCB trace, solder mask opening, or thermal pad should contact it. Grounding or routing to any net risks internal shorting or parametric shift, as confirmed in the "Pinning information" section (Table 2).

How does BAS21THVL perform at 150 °C junction temperature?

At T_j = 150 °C, reverse leakage rises to 100 µA (per Fig. 5), while forward voltage remains ≤1.25 V (per Fig. 2). The 50 ns t_rr is specified at 25 °C only; actual t_rr increases to ~75 ns at 150 °C, verified in Nexperia's characterization data.

BAS21THVL Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BAS16

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 200mA

Voltage - Forward (Vf) (Max) @ If:: 1.25 V @ 200 mA

Speed:: Small Signal =< 200mA (Io), Any Speed

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 100 nA @ 200 V

Capacitance @ Vr, F:: 5pF @ 0V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

Operating Temperature - Junction:: 175°C (Max)

BAS21THVL FAQ

1.How can I place an order for BAS21THVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BAS21THVL 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 BAS21THVL reliable?

The price and inventory of BAS21THVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21THVL is usually 5 days.

3.What payment methods are accepted for BAS21THVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21THVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAS21THVL?

BAS21THVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAS21THVL 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 BAS21THVL?

For technical support, including BAS21THVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21THVL requirements.

6.How does Aetrix verify that BAS21THVL is sourced from the original manufacturer or authorized distributors?

All BAS21THVL 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 BAS21THVL meets industry standards.

7.What is the process for return or replacement of BAS21THVL?

All BAS21THVL units undergo pre-shipment inspection (PSI). If there is an issue with BAS21THVL, 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 BAS21THVL part is unused and in its original packaging.

Return procedure for BAS21THVL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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