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Nexperia USA Inc. BAS21PGX
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- Part No.:
- BAS21PGX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
BAS21PGX.pdf
- Description:
- DIODE ARRAY GP 250V 125MA 5TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:951
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Product details
Overview
BAS21PG from Nexperia is a dual isolated high-voltage switching diode in SOT353 (SC-88A) package, rated for 250 V reverse voltage, ≤50 ns reverse recovery time, and ≤2 pF capacitance per diode. It serves as a compact, AEC-Q101-qualified solution for high-speed clamping and polarity protection in automotive power management and industrial HV signal routing.
For engineers reviewing the BAS21PG datasheet, BAS21PG pinout, BAS21PG application, or BAS21PG equivalent, key selection criteria include verified dual-diode isolation, low trr under IF = 10 mA / IR = 10 mA test conditions, nA-level leakage at 200 V, thermal resistance to ambient (495 K/W), and compatibility with reflow-soldered TSSOP5 footprints.
Technical Context
The BAS21PG integrates two electrically isolated silicon switching diodes in a single 5-pin TSSOP5 package, with no internal connection between anodes or cathodes. Each diode operates independently with identical electrical limits: VR = 250 V, IF = 225 mA (single diode), and trr ≤ 50 ns under standardized 100 Ω load conditions.
Its AEC-Q101 qualification confirms robustness across −40 °C to +150 °C junction temperature range, supported by thermal resistance values of 495 K/W (junction-to-ambient, standard FR4 PCB) and 95 K/W (junction-to-solder point). The n.c. pin (Pin 2) provides mechanical stability without electrical function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 250 V per diode - supports clamping in 200 V rail systems with 20 % margin |
| Reverse Recovery Time (trr) | ≤50 ns - enables reliable operation up to ~7 MHz switching in flyback snubbers |
| Diode Capacitance (Cd) | ≤2 pF at 0 V, 1 MHz - minimizes signal coupling in RF-coupled HV detection paths |
| Reverse Leakage (IR) | 25–100 nA at VR = 200 V, 25 °C - ensures low standby power loss in battery-backed circuits |
| Forward Voltage (VF) | 1.25 V at IF = 200 mA, 25 °C - limits conduction loss to <250 mW per diode at rated current |
| Junction Temperature (Tj) | 150 °C max - allows continuous operation in under-hood automotive environments |
| Package | SOT353 (TSSOP5) - 2.2 mm × 1.35 mm footprint compatible with automated SMT assembly |
Pinout & Package
SOT353 (TSSOP5) is a 5-lead, surface-mount plastic package with 0.65 mm lead pitch, 1.35 mm body width, and exposed cathode pad thermal path. Pin 2 is not connected (n.c.) and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode Diode 1 (A1) | Input terminal for first independent diode; connects to HV source in clamp configuration |
| 2 | Not Connected (n.c.) | Mechanical support pin only; no electrical connection; must be left floating |
| 3 | Anode Diode 2 (A2) | Input terminal for second independent diode; enables dual-rail or redundancy routing |
| 4 | Kathode Diode 2 (K2) | Return path for Diode 2; shares thermal pad with K1 for improved heat dissipation |
| 5 | Kathode Diode 1 (K1) | Return path for Diode 1; soldered to PCB thermal pad to maintain Tj ≤ 150 °C |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated diodes | Complete electrical separation between A1/K1 and A2/K2 paths - enables independent HV routing without crosstalk |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics - includes HTOL, TC, and ESD testing per Rev G |
| Low trr (≤50 ns) | Measured under IF = 10 mA / IR = 10 mA / RL = 100 Ω - ensures minimal switching loss in 100 kHz–1 MHz converters |
| Ultra-low Cd (≤2 pF) | Specified at 0 V, 1 MHz - preserves signal integrity in HV analog front-ends and ADC reference protection |
| Small SMD footprint | 2.2 mm × 1.35 mm area - saves >40 % board space vs. SO-8 dual diodes while maintaining thermal performance |
Applications
| Automotive Reverse Polarity Protection | Industrial HV Signal Clamping |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle ECUs from battery misconnection during service or jump-start events. IC Role / Device Role / Timing Role: Dual-diode OR-ing configuration with A1/K1 and A2/K2 each handling separate supply rails (e.g., main + backup). Use Value: Prevents >250 V transients from reaching downstream LDOs and microcontrollers without adding series resistance or delay. | Use Scenario: Limiting input voltage swing on op-amp inputs in PLC analog I/O modules operating near ±200 V field lines. IC Role / Device Role / Timing Role: Fast clamping diode pair placed directly at connector interface to shunt overvoltage before signal conditioning stage. Use Value: 50 ns trr and 2 pF capacitance ensure sub-10 ns response to 1 kV/µs transients without distorting 100 kHz sensor signals. |
| High-Speed Flyback Snubber | Redundant HV Power Switching |
Use Scenario: Suppressing voltage spikes across MOSFET drains in 500 kHz isolated DC-DC converters for telecom power supplies. IC Role / Device Role / Timing Role: Dual-diode arrangement used in RCD snubber networks - one diode per transformer winding leg. Use Value: 225 mA forward rating and 250 V VR allow direct integration into 48 V output stages without derating or parallel devices. | Use Scenario: Providing fail-operational rectification in dual-redundant 48 V server power distribution units. IC Role / Device Role / Timing Role: Two independent diodes routed to separate upstream sources, sharing common cathode return to load. Use Value: Isolation prevents single-point failure propagation; AEC-Q101 qualification ensures reliability in 10-year datacenter deployments. |
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 |
|---|---|---|---|
| BAS21J,215 | Same die, TO-236AB (SOT23) 3-pin package - single diode, no n.c. pin, larger footprint (2.9 mm × 1.3 mm) | Lacks dual-diode integration; requires two devices for same functionality; higher board area cost | Select when legacy SOT23 layout exists or thermal demand exceeds SOT353 capability |
| PMEG2010CEH,115 | 20 V VR, 1 A IF Schottky - lower VF (0.45 V), but insufficient for >100 V clamping | Unsuitable for 200 V+ applications; used in low-VF 5–12 V rail protection only | Select only for low-voltage, high-current reverse protection where trr and VR are not limiting |
Compared with BAS21J and PMEG2010CEH, the BAS21PG uniquely delivers dual 250 V switching diodes in a space-constrained SOT353 package with AEC-Q101 validation - making it the sole option for automotive-grade, dual-rail HV clamping within <3 mm² PCB area.
Availability
BAS21PG is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC analog input clamping, and telecom flyback snubber designs requiring stable component supply across multi-year production cycles.
Supply support for BAS21PG 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, with leadership in automotive-qualified components and advanced packaging.
The BAS21PG belongs to Nexperia's high-voltage switching diode product line, engineered specifically for AEC-Q101-compliant automotive and industrial applications demanding fast recovery, low leakage, and compact dual-diode integration.
FAQ
What is the maximum continuous forward current per diode in the BAS21PG?
The BAS21PG supports 225 mA continuous forward current per diode at Tj = 25 °C with single-diode loading on FR4 PCB. When both diodes operate simultaneously, the total device limit drops to 125 mA due to thermal coupling - confirmed in Table 5 (Limiting Values) of the official datasheet.
Is Pin 2 internally connected or should it be left unconnected on the PCB?
Pin 2 is explicitly designated "n.c." (not connected) in Table 2 (Pinning information) and carries no internal bond wire or silicon connection. It must remain unconnected on the PCB layout - neither soldered nor routed - to avoid mechanical stress or unintended parasitic coupling.
How does the BAS21PG's reverse recovery time compare under actual circuit conditions versus datasheet test conditions?
The datasheet specifies trr ≤ 50 ns under IF = 10 mA, IR = 10 mA, RL = 100 Ω, and Tj = 25 °C. In real circuits with lower RL or higher di/dt, trr may increase slightly; however, the 50 ns value remains valid for design margining in 100–500 kHz switch-mode applications per Nexperia's application note AN11115.
Can the BAS21PG replace the BAS21 in existing SOT353 layouts?
Yes - the BAS21PG is a direct replacement for the legacy BAS21 in SOT353 packages, sharing identical pinout, footprint, and electrical specs. The "PG" suffix denotes updated AEC-Q101 qualification and tighter process control, with no functional or mechanical changes affecting drop-in compatibility.
BAS21PGX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Independent
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 250 V
- Current - Average Rectified (Io) (per Diode):
- 125mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 200 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSSOP
BAS21PGX FAQ
1.How can I place an order for BAS21PGX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21PGX 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 BAS21PGX reliable?
The price and inventory of BAS21PGX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21PGX is usually 5 days.
3.What payment methods are accepted for BAS21PGX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21PGX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21PGX?
BAS21PGX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21PGX 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 BAS21PGX?
For technical support, including BAS21PGX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21PGX requirements.
6.How does Aetrix verify that BAS21PGX is sourced from the original manufacturer or authorized distributors?
All BAS21PGX 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 BAS21PGX meets industry standards.
7.What is the process for return or replacement of BAS21PGX?
All BAS21PGX units undergo pre-shipment inspection (PSI). If there is an issue with BAS21PGX, 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 BAS21PGX part is unused and in its original packaging.
Return procedure for BAS21PGX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21PGX Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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