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Vishay BZD27B3V9P-HE3_A18
- Part No.:
- BZD27B3V9P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B3V9P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,043
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Product details
Overview
BZD27B3V9P-HE3_A18 from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation and transient overvoltage protection in automotive-grade power rails, with nominal Zener voltage 3.9 V ±2 %, 100 mA test current, 150 W peak surge power rating, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the BZD27B3V9P-HE3_A18 datasheet, BZD27B3V9P-HE3_A18 pinout, BZD27B3V9P-HE3_A18 application, or BZD27B3V9P-HE3_A18 equivalent, key selection criteria include its ±2 % VZ tolerance, low dynamic resistance (4 Ω typ.), negative temperature coefficient (–0.14 to –0.04 %/°C), SOD-123W-compatible SMF (DO-219AB) package, and 175 °C maximum junction temperature.
Technical Context
This unidirectional Zener diode operates in reverse-bias breakdown mode to clamp or regulate voltage at 3.9 V with tight ±2 % initial tolerance. Its design supports both steady-state regulation (IZT = 100 mA) and high-energy transient suppression (PRSM = 150 W, 10/1000 μs waveform).
It features low leakage (IR ≤ 50 μA at VR = 3.82 V), low dynamic impedance (ZZ = 4 Ω typ. at IZT), and stable performance across –65 °C to +175 °C operating range - enabled by silicon planar construction, MSL level 1 moisture sensitivity rating, and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.82 V min. to 3.98 V max. at 100 mA - enables precise 3.9 V rail clamping with ±2 % tolerance for automotive sensor supply stabilization |
| Test Current (IZT) | 100 mA - defines nominal regulation point; ensures stable operation under typical bias conditions in low-power control circuits |
| Peak Surge Power (PRSM) | 150 W (10/1000 μs) - provides robust ESD and load-dump transient immunity per ISO 7637-2 without derating |
| Dynamic Resistance (ZZ) | 4 Ω typical at IZT - minimizes voltage deviation under varying load current, critical for reference stability in ADC bias networks |
| Temperature Coefficient (αVZ) | –0.14 %/°C min. to –0.04 %/°C max. - ensures predictable, monotonic VZ drift over temperature for compensated designs |
| Junction Temperature (TJ) | 175 °C max. - supports continuous operation in high-ambient under-hood environments without thermal shutdown |
| Package | SMF (DO-219AB) - surface-mount, low-profile (1.08 mm height), compatible with SOD-123W footprint and reflow soldering at 260 °C peak |
Pinout & Package
SMF (DO-219AB) package: 2-terminal, unidirectional device with cathode marked by band on top surface; dimensions 2.9 mm × 1.4 mm × 1.08 mm; designed for 3 mm × 3 mm Cu pad layout per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node; carries forward current up to 0.2 A (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal / regulated output node | Connected to protected rail; sinks reverse current during overvoltage events; marking band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in voltage reference circuits and improves batch consistency in production |
| 150 W peak surge rating (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a load-dump transients without degradation in 12 V systems |
| MSL Level 1, 260 °C peak reflow | Enables single-pass assembly with standard lead-free reflow profiles without baking or special handling |
| Low dynamic resistance (4 Ω typ.) | Maintains < ±50 mV regulation error across ±20 mA load variation - suitable for precision analog supply rails |
Applications
| Automotive Sensor Power Regulation | Industrial PLC Input Protection |
|---|---|
Use Scenario: Stabilizing 3.9 V supply for MEMS pressure sensors in engine manifold modules exposed to ambient temperatures up to 150 °C. IC Role / Device Role / Timing Role: Zener voltage regulator providing low-drift reference for sensor excitation and ADC biasing. Use Value: Maintains ±2 % output accuracy over full temperature range and survives repeated load-dump transients per ISO 7637-2. | Use Scenario: Protecting 24 V digital input channels of programmable logic controllers against field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor clamping reverse transients before they reach input buffer ICs. Use Value: Limits clamping voltage to ≤11.8 V at 12.2 A peak surge current, preventing latch-up in 3.3 V logic interfaces. |
| USB-C Port Overvoltage Clamp | Medical Infusion Pump Power Rail Guard |
Use Scenario: Safeguarding USB-C VBUS line during hot-plug events where accidental 20 V adapter misconnection may occur. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting VBUS to 3.98 V to protect downstream USB PD controller and level shifters. Use Value: Responds within nanoseconds to clamp overvoltage while dissipating 150 W peak energy - avoids reliance on slower TVS diodes. | Use Scenario: Securing 5 V microcontroller supply in battery-powered infusion pumps requiring IEC 60601-1 compliance and long-term reliability. IC Role / Device Role / Timing Role: Precision voltage regulator and surge limiter ensuring stable MCU operation during motor startup-induced line disturbances. Use Value: Combines ±2 % VZ tolerance with 175 °C TJ rating to meet 10-year field life requirements under continuous thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9-HE3-08 | Same 3.9 V nominal Zener voltage but ±5 % tolerance; SOT-23 package; 350 mW Ptot; not AEC-Q101 qualified | Limited to commercial-grade consumer electronics; insufficient surge rating for automotive transients | Select only for cost-sensitive, non-automotive applications with relaxed accuracy and no surge immunity requirement |
| SMBJ3V3A | 3.3 V standoff voltage; bidirectional; 600 W peak power; DO-214AA package; higher clamping voltage (6.5 V) | Designed for system-level ESD/surge protection rather than precision regulation | Choose when primary need is high-energy transient suppression - not when tight 3.9 V regulation is required |
Compared with BZD27B3V9P-HE3_A18, BZX84-C3V9-HE3-08 trades AEC-Q101 qualification and ±2 % tolerance for smaller size and lower cost, while SMBJ3V3A offers higher surge capacity but lacks the precision regulation and unidirectional behavior needed for reference applications.
Availability
BZD27B3V9P-HE3_A18 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device power management requiring stable component supply, AEC-Q101 compliance, and high-reliability Zener regulation.
Supply support for BZD27B3V9P-HE3_A18 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The BZD27B Series targets high-stability Zener regulation in harsh environments, with design emphasis on AEC-Q101 qualification, tight voltage tolerance, and robust surge capability for next-generation vehicle electronics.
FAQ
What is the Zener voltage tolerance of BZD27B3V9P-HE3_A18?
The BZD27B3V9P-HE3_A18 has a Zener voltage tolerance of ±2 %, specified as 3.82 V minimum to 3.98 V maximum at 100 mA test current. This tight tolerance is achieved through precision silicon planar processing and is maintained across the full operating temperature range of –65 °C to +175 °C. The BZD27B3V9P-HE3_A18 is therefore suitable for applications requiring stable reference voltages without external calibration.
Is BZD27B3V9P-HE3_A18 qualified for automotive use?
Yes, BZD27B3V9P-HE3_A18 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and ESD (HBM > 8 kV, MM > 800 V). The "HE3" suffix explicitly denotes AEC-Q101 qualification and RoHS compliance. This makes the BZD27B3V9P-HE3_A18 appropriate for under-hood and safety-critical automotive subsystems such as engine control, ADAS sensors, and body electronics.
What package does BZD27B3V9P-HE3_A18 use, and is it compatible with standard footprints?
BZD27B3V9P-HE3_A18 uses the SMF (DO-219AB) package - a low-profile surface-mount case measuring 2.9 mm × 1.4 mm × 1.08 mm. It is mechanically and thermally compatible with SOD-123W, SOD-123F, and SOD-123FL footprints. The recommended PCB pad layout is 3 mm × 3 mm copper pads (≥40 μm thick), and the device supports wave and reflow soldering with peak temperature up to 260 °C (MSL Level 1).
How does BZD27B3V9P-HE3_A18 perform under surge conditions?
BZD27B3V9P-HE3_A18 delivers 150 W peak surge power (PRSM) under the 10/1000 μs waveform per IEC 61000-4-5, and 300 W under 100 μs square pulse. Its clamping voltage is 11.8 V at 12.2 A (IRSM), enabling effective protection against load-dump transients in 12 V automotive systems. The device maintains parameter stability after surge events due to its robust silicon planar structure and 175 °C junction rating.
What is the temperature coefficient of BZD27B3V9P-HE3_A18, and how does it affect circuit design?
The temperature coefficient (αVZ) of BZD27B3V9P-HE3_A18 ranges from –0.14 %/°C to –0.04 %/°C at 100 mA, indicating a negative, predictable drift in Zener voltage with rising temperature. This allows designers to compensate for thermal drift in precision references - for example, pairing with a positive-TC component to achieve near-zero net drift. The coefficient is tightly controlled and verified across the full –65 °C to +175 °C operating range, making the BZD27B3V9P-HE3_A18 suitable for high-stability analog circuits.
BZD27B3V9P-HE3_A18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- DO-219AB
- Series:
- BZD27B-M
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 1V (Max)
- Voltage - Breakdown (Min):
- 3.82V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
BZD27B3V9P-HE3_A18 FAQ
1.How can I place an order for BZD27B3V9P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B3V9P-HE3_A18 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 BZD27B3V9P-HE3_A18 reliable?
The price and inventory of BZD27B3V9P-HE3_A18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B3V9P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B3V9P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B3V9P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B3V9P-HE3_A18?
BZD27B3V9P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B3V9P-HE3_A18 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 BZD27B3V9P-HE3_A18?
For technical support, including BZD27B3V9P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B3V9P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B3V9P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B3V9P-HE3_A18 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 BZD27B3V9P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B3V9P-HE3_A18?
All BZD27B3V9P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B3V9P-HE3_A18, 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 BZD27B3V9P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B3V9P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B3V9P-HE3_A18 Tags
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