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Vishay BZD27B33P-HE3_A08
- Part No.:
- BZD27B33P-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B33P-HE3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
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Product details
Overview
BZD27B33P-HE3_A08 from Vishay Semiconductors is a surface-mount, AEC-Q101 qualified Zener diode with nominal breakdown voltage of 33 V, ±2 % tolerance, 25 mA test current, and 150 W peak surge power rating (10/1000 μs). It operates as a precision voltage reference and transient voltage suppressor in automotive power rail protection circuits.
For engineers reviewing the BZD27B33P-HE3_A08 datasheet, BZD27B33P-HE3_A08 pinout, BZD27B33P-HE3_A08 application, or BZD27B33P-HE3_A08 equivalent, key selection criteria include its 33 V zener voltage tolerance, 150 W surge capability, SOD-123W-compatible SMF (DO-219AB) package, -65 °C to +175 °C operating range, and AEC-Q101 qualification for automotive use.
Technical Context
This unidirectional Zener diode delivers stable voltage regulation under DC bias and clamps transients via avalanche breakdown. Its 32.34 V minimum / 33.66 V maximum zener voltage at 25 mA ensures tight regulation in feedback loops and reference circuits.
Designed for high-reliability automotive environments, it features ESD robustness (>8 kV HBM), MSL level 1 moisture sensitivity, JESD 201 Class 2 whisker resistance, and wave/reflow solder compatibility - all validated per AEC-Q101 stress testing protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 32.34–33.66 V range at IZT = 25 mA - enables precise 33 V rail stabilization |
| Surge Power (PRSM) | 150 W (10/1000 μs) - withstands automotive load-dump and ISO 7637-2 pulse 5a events |
| Clamping Voltage (VC) | 44.4 V at IRSM = 5 A - limits transient overvoltage to safe levels for downstream ICs |
| Dynamic Resistance (ZZ) | 8 Ω max at IZT = 25 mA - ensures low regulation error under varying load currents |
| Temperature Coefficient (αVZ) | +0.06 to +0.11 %/°C - supports stable operation across -65 °C to +175 °C ambient |
| Junction-to-Ambient RthJA | 180 K/W on 3 mm × 3 mm Cu pad - defines thermal derating for PCB layout |
| Leakage Current (IR) | 5 μA max at VR = 27 V - minimizes standby power loss in always-on systems |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint. Dimensions: 2.9 × 1.4 × 1.08 mm (L × W × H), cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to lower-potential node in clamp configuration; enables standard diode forward drop (VF ≤ 1.2 V @ 0.2 A) |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; defines 33 V reverse-bias clamping threshold relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood applications including engine control units and body electronics |
| 150 W peak surge rating | Meets ISO 7637-2 Pulse 5a requirements without external series impedance |
| ±2 % VZ tolerance | Reduces need for post-production trimming in voltage reference designs |
| MSL Level 1 rating | Enables standard reflow assembly without baking or special handling |
| Low dynamic impedance (8 Ω) | Maintains regulation accuracy across 10–100 mA load variations |
Applications
| Engine Control Unit (ECU) Power Protection | Automotive Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Protects 33 V auxiliary supply rail in gasoline/diesel engine ECUs against load dump transients. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between battery input and DC-DC converter input. Use Value: Clamps 10/1000 μs surges to ≤44.4 V, preventing damage to 36 V-rated buck controllers and microcontrollers. | Use Scenario: Safeguards USB-C PD and display power rails in head unit systems exposed to battery line noise. IC Role / Device Role / Timing Role: Standoff voltage limiter on 33 V intermediate bus feeding PMICs and audio amplifiers. Use Value: Provides <5 μA leakage at 27 V, minimizing quiescent current while delivering 150 W surge immunity. |
| ADAS Camera Module Bias Supply | Electric Power Steering (EPS) Sensor Reference |
Use Scenario: Stabilizes 33 V bias for CMOS image sensor analog front-end in surround-view cameras. IC Role / Device Role / Timing Role: Precision Zener reference in low-noise LDO feedback network. Use Value: ±2 % VZ tolerance and +0.06 %/°C TC ensure <±1.5 % output drift over -40 °C to +125 °C junction range. | Use Scenario: Supplies regulated 33 V reference to torque and position sensors in EPS motor control modules. IC Role / Device Role / Timing Role: High-stability voltage reference for ratiometric sensor excitation. Use Value: 8 Ω dynamic resistance maintains reference accuracy despite 10–50 mA sensor current fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | TVS diode (unidirectional), 33 V standoff, 600 W peak power, larger SMB package | Higher surge capacity but looser voltage tolerance (±5 %); intended for primary surge suppression, not precision regulation | Select when system requires >150 W transient absorption and can tolerate wider clamping spread |
| BZX84-C33-HE3-08 | SOT-23 Zener, 33 V, ±5 %, 300 mW PD, no AEC-Q101 qualification | Limited to low-power signal-level regulation; unsuitable for automotive power rail clamping | Choose only for non-automotive, space-constrained, sub-100 mW reference applications |
Compared with SMBJ33A-E3/52, BZD27B33P-HE3_A08 offers tighter voltage tolerance and smaller footprint but lower surge rating; versus BZX84-C33-HE3-08, it provides 8× higher power handling and full AEC-Q101 compliance for underhood deployment.
Availability
BZD27B33P-HE3_A08 is available at Aetrix Electronics and suitable for automotive power protection, industrial sensor reference, and ADAS camera biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZD27B33P-HE3_A08 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 automotive, industrial, and computing markets.
The BZD27B Series targets automotive-grade voltage regulation and transient suppression, designed specifically to meet AEC-Q101 requirements while maintaining tight zener tolerances and high surge robustness in compact surface-mount packages.
FAQ
What is the exact zener voltage tolerance of BZD27B33P-HE3_A08?
The BZD27B33P-HE3_A08 has a guaranteed zener voltage range of 32.34 V to 33.66 V at 25 mA test current, corresponding to ±2 % tolerance around the nominal 33 V value. This specification is verified per Vishay's Rev. 2.1 datasheet (Document Number: 85921) and applies under standard test conditions (TA = 25 °C).
Is BZD27B33P-HE3_A08 qualified for automotive applications?
Yes, BZD27B33P-HE3_A08 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It passes stress tests including high-temperature operating life, temperature cycling, and ESD (HBM >8 kV), making it suitable for underhood automotive systems such as engine control units and ADAS modules.
What package does BZD27B33P-HE3_A08 use, and is it compatible with standard pick-and-place equipment?
BZD27B33P-HE3_A08 uses the SMF (DO-219AB) package - a low-profile, surface-mount case with dimensions 2.9 mm × 1.4 mm × 1.08 mm. It is supplied in 8 mm tape on 7″ reels (3000 units/reel) and is fully compatible with standard automated assembly equipment per J-STD-020 MSL Level 1 guidelines.
What is the maximum clamping voltage of BZD27B33P-HE3_A08 during a surge event?
Under a 10/1000 μs surge waveform at 5 A peak current, the BZD27B33P-HE3_A08 clamps to a maximum of 44.4 V. This value is specified in the "Electrical Characteristics" table on page 3 of the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during transient events.
Does BZD27B33P-HE3_A08 have a specified thermal resistance to ambient?
Yes, BZD27B33P-HE3_A08 has a junction-to-ambient thermal resistance (RthJA) of 180 K/W when mounted on a standard epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value governs power derating above 30 °C ambient and is critical for thermal design validation in automotive applications.
BZD27B33P-HE3_A08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- DO-219AB
- Series:
- BZD27B, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 27V (Max)
- Voltage - Breakdown (Min):
- 32.34V
- Voltage - Clamping (Max) @ Ipp:
- 44.4V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
BZD27B33P-HE3_A08 FAQ
1.How can I place an order for BZD27B33P-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B33P-HE3_A08 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 BZD27B33P-HE3_A08 reliable?
The price and inventory of BZD27B33P-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B33P-HE3_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B33P-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B33P-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B33P-HE3_A08?
BZD27B33P-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B33P-HE3_A08 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 BZD27B33P-HE3_A08?
For technical support, including BZD27B33P-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B33P-HE3_A08 requirements.
6.How does Aetrix verify that BZD27B33P-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B33P-HE3_A08 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 BZD27B33P-HE3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B33P-HE3_A08?
All BZD27B33P-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B33P-HE3_A08, 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 BZD27B33P-HE3_A08 part is unused and in its original packaging.
Return procedure for BZD27B33P-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B33P-HE3_A08 Tags
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