My Inquiry
My Account
Nexperia USA Inc. BAS21GW-QJ
- Part No.:
- BAS21GW-QJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAS21GW-QJ.pdf
- Description:
- BAS21GW-Q/SOD123/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:2,307
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAS21GW-Q from Nexperia is a high-voltage switching diode in SOD123 package, designed for fast turn-off in automotive and industrial power supply rails. It delivers 200 V reverse voltage rating, ≤50 ns reverse recovery time, ≤100 nA leakage at 200 V, and supports 225 mA continuous forward current - enabling reliable operation in 12 V/24 V vehicle subsystems and DC-DC flyback snubbers.
For engineers reviewing the BAS21GW-Q datasheet, BAS21GW-Q pinout, BAS21GW-Q application, or BAS21GW-Q equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance values (Rth(j-a) = 330 K/W), cathode/anode terminal mapping, and automotive-grade substitution guidance - all directly traceable to Nexperia's April 2024 product data sheet.
Technical Context
This diode uses an epitaxial planar silicon structure optimized for high-speed switching under repetitive 200 V reverse bias. Its trr ≤ 50 ns is measured under standardized IF = IR = 10 mA, RL = 100 Ω, IR(meas) = 1 mA conditions at Tj = 25 °C - ensuring predictable timing in PWM-controlled inductive loads.
The device achieves low capacitance (Cd ≤ 2 pF at VR = 0 V, f = 1 MHz) and low leakage (IR ≤ 100 nA at VR = 200 V, Tj = 25 °C), making it suitable for high-frequency rectification where parasitic charge storage must be minimized - especially in automotive body control modules and LED driver flyback clamps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VRRM) | 250 V peak repetitive - withstands transient spikes in 24 V automotive systems without breakdown. |
| Forward Current (IF) | 225 mA continuous - supports steady-state operation in signal-level switching and auxiliary rail clamping. |
| Reverse Recovery Time (trr) | ≤50 ns - enables stable switching up to ~10 MHz in resonant converters and snubber networks. |
| Reverse Leakage (IR) | ≤100 nA at 200 V, 25 °C - ensures minimal standby power loss in always-on vehicle modules. |
| Diode Capacitance (Cd) | ≤2 pF at 0 V, 1 MHz - reduces high-frequency coupling and EMI in fast-switching node protection. |
| Junction Temperature (Tj) | 150 °C max - validated for under-hood environments including engine control units and lighting drivers. |
Pinout & Package
Encapsulated in a compact SOD123 surface-mount plastic package (2.675 mm × 1.6 mm × 1.15 mm), with cathode and anode leads exposed on opposite ends of the molded body for standard reflow soldering per IPC-7351B footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node during reverse bias; marked with band and 'GC' code; primary heat path to PCB via cathode pad. |
| 2 | Anode (A) | Connected to lower-potential node during conduction; carries forward current into load; electrically isolated from cathode by PN junction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements - eliminates need for additional qualification in Tier-1 BOMs. |
| Low Rth(j-sp) | 190 K/W junction-to-solder-point - improves thermal reliability when mounted on 1 cm² cathode copper pad. |
| High VR / IR ratio | 200 V reverse hold with only 100 nA leakage - enables robust isolation in battery disconnect and load-dump protection circuits. |
| Small SOD123 footprint | 2.675 mm × 1.6 mm body - saves board space vs. DO-35 or SOD-323 in space-constrained ADAS sensor modules. |
Applications
| Automotive Body Control Module | Industrial DC-DC Flyback Snubber |
|---|---|
|
Use Scenario: Clamping voltage spikes across relay coils and solenoid drivers in BCM power distribution units. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode absorbing inductive kickback during MOSFET turn-off. Use Value: 50 ns trr prevents voltage overshoot beyond 250 V rating, protecting 40 V-rated gate drivers in 12 V systems. |
Use Scenario: Suppressing ringing and dissipating stored energy in transformer leakage inductance of isolated flyback converters. IC Role / Device Role / Timing Role: Secondary-side snubber diode conducting brief high-dV/dt transients during switch transitions. Use Value: 2 pF capacitance minimizes capacitive coupling into feedback loop, preserving regulation stability at >500 kHz switching. |
| LED Headlamp Driver Clamp | Power Supply Input Protection |
|
Use Scenario: Reverse polarity and load-dump protection in constant-current LED driver IC inputs. IC Role / Device Role / Timing Role: High-voltage blocking diode placed before LDO or buck controller input pins. Use Value: 250 V VRRM withstands ISO 7637-2 Pulse 5a (load dump up to 270 V) without avalanche conduction. |
Use Scenario: Preventing backfeed between redundant 24 V power rails in industrial PLC backplanes. IC Role / Device Role / Timing Role: OR-ing diode isolating parallel power sources while minimizing forward drop. Use Value: 1.25 V VF at 200 mA balances conduction loss and thermal rise in ambient temperatures up to 85 °C. |
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 | 200 V VR, 100 ns trr, SOT-23 package, no AEC-Q101 qualification | Higher trr increases switching loss in >1 MHz designs; lacks automotive qualification documentation | Select only for non-automotive cost-sensitive consumer power supplies where 50 ns timing margin is not required. |
| Vishay 1N4148WS | 100 V VR, 4 ns trr, same SOD-123 footprint, no AEC-Q101 | Insufficient reverse voltage for 24 V automotive systems; unsuitable for load-dump scenarios | Use only in low-voltage (<15 V) signal routing or logic-level clamping where speed outweighs voltage rating. |
Compared with MMBD2103LT1G and 1N4148WS, BAS21GW-Q uniquely combines AEC-Q101 compliance, 250 V peak reverse capability, and 50 ns recovery - making it the only qualified option for automotive power rail clamping where both voltage headroom and timing fidelity are mandatory.
Availability
BAS21GW-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC flyback snubbers, and LED headlamp driver clamp circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAS21GW-Q 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 technologies.
BAS21GW-Q belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robustness in automotive power management, load switching, and transient suppression applications.
FAQ
Is BAS21GW-Q pin-compatible with BAS21,115?
No. BAS21GW-Q uses SOD123 package with 2.675 mm × 1.6 mm body and cathode/anode pinning, while BAS21,115 is in SOD-123W (wider variant) with different thermal pad layout and solder mask clearance. Mechanical fit and thermal performance differ - direct replacement requires PCB footprint verification.
What is the maximum allowable surge current for BAS21GW-Q?
The non-repetitive peak forward current (IFSM) is 1.7 A for 10 ms square-wave pulses at Tj(init) = 25 °C. For shorter pulses, the rating scales per Fig. 6: 9 A at 1 µs, 3 A at 100 µs - all defined with specified thermal boundary conditions on FR4 PCB.
Does BAS21GW-Q require derating above 25 °C ambient?
Yes. The 225 mA IF rating applies only at Tamb ≤ 25 °C. Derating follows the thermal resistance Rth(j-a) = 330 K/W: maximum IF decreases linearly to zero at Tj = 150 °C, resulting in ~150 mA at 85 °C ambient with standard FR4 mounting.
Can BAS21GW-Q be used in place of a Zener diode for overvoltage clamping?
No. BAS21GW-Q is a switching diode with no controlled reverse breakdown characteristic. It blocks up to 250 V but does not regulate or clamp at a defined voltage like a Zener. For clamping, use dedicated TVS diodes such as PESD5V0S1BA with 5.6 V breakdown and 200 W peak pulse power.
BAS21GW-QJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 225mA
- 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:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- 150°C
BAS21GW-QJ FAQ
1.How can I place an order for BAS21GW-QJ through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21GW-QJ 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 BAS21GW-QJ reliable?
The price and inventory of BAS21GW-QJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21GW-QJ is usually 5 days.
3.What payment methods are accepted for BAS21GW-QJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21GW-QJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21GW-QJ?
BAS21GW-QJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21GW-QJ 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 BAS21GW-QJ?
For technical support, including BAS21GW-QJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21GW-QJ requirements.
6.How does Aetrix verify that BAS21GW-QJ is sourced from the original manufacturer or authorized distributors?
All BAS21GW-QJ 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 BAS21GW-QJ meets industry standards.
7.What is the process for return or replacement of BAS21GW-QJ?
All BAS21GW-QJ units undergo pre-shipment inspection (PSI). If there is an issue with BAS21GW-QJ, 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 BAS21GW-QJ part is unused and in its original packaging.
Return procedure for BAS21GW-QJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21GW-QJ Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
