My Inquiry
My Account
Vishay BZD27B33P-HE3_A18
- Part No.:
- BZD27B33P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B33P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,607
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZD27B33P-HE3_A18 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, 44.4 V clamping voltage at 5 A surge, and 150 W peak surge power rating. It serves as a precision voltage reference and transient overvoltage protector in automotive power rail conditioning circuits.
For engineers reviewing the BZD27B33P-HE3_A18 datasheet, BZD27B33P-HE3_A18 pinout, BZD27B33P-HE3_A18 application, or BZD27B33P-HE3_A18 equivalent, key selection criteria include its 33 V Zener voltage tolerance, 150 W 10/1000 μs surge rating, DO-219AB (SMF) package compatibility, and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This unidirectional Zener diode operates in reverse-bias breakdown mode to regulate or clamp voltage. Its 32.34–33.66 V Zener range at 25 mA ensures tight regulation stability across temperature, while low dynamic resistance (8 Ω typical) supports fast response to transients.
The device features a silicon planar construction, meets MSL level 1 per J-STD-020 (260 °C reflow peak), and delivers >8 kV HBM ESD robustness-enabling reliable operation in harsh automotive environments without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.34–33.66 V at 25 mA - defines precise clamping threshold for 12 V/24 V system rail protection |
| Clamping Voltage (VC) | 44.4 V at IRSM = 5 A - limits transient overshoot during ISO 7637-2 pulse 1/2a events |
| Peak Surge Power (PRSM) | 150 W (10/1000 μs) - sustains automotive load-dump surges without failure |
| Dynamic Resistance (ZZ) | 8 Ω max at 25 mA - ensures minimal voltage shift under varying current loads |
| Temperature Coefficient (αVZ) | +0.06 to +0.11 %/°C - enables predictable drift compensation in wide-temperature designs |
| Junction Temp. Max | 175 °C - supports placement near high-power components in engine control units |
| Package | DO-219AB (SMF) - 2.7 × 3.5 mm footprint with 0.85 mm height for dense PCB layouts |
Pinout & Package
DO-219AB (SMF) low-profile surface-mount package: 2.7 mm × 3.5 mm body, 0.85 mm max height, cathode marked by band on top surface. Compatible with standard SOD-123W footprint layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node (e.g., ground or return path) during clamping |
| Cathode | Current exit terminal in reverse breakdown | Connected to protected rail (e.g., 24 V battery line); marked by band on package top |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control, body electronics, and ADAS power supplies |
| MSL Level 1 rating | Enables single-pass 260 °C reflow without moisture-induced damage or popcorn effect |
| 150 W 10/1000 μs surge capability | Withstands ISO 7637-2 Pulse 5a load-dump transients up to 120 V without degradation |
| ±2 % VZ tolerance | Reduces need for post-production trimming in precision voltage reference designs |
| Low leakage (≤5 μA at VR = 27 V) | Minimizes standby power loss in always-on vehicle modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller supply rails from alternator load-dump spikes in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between 24 V battery rail and LDO input. Use Value: Clamps 120 V/150 W load-dump transients to ≤44.4 V within nanoseconds, preventing LDO destruction and MCU brownout. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input optocoupler front-end. Use Value: Limits induced transients to <45 V before signal conditioning, preserving input integrity without adding series resistance or delay. |
| Automotive Body Control Module (BCM) | Telecom Power Interface |
Use Scenario: Stabilizing 12 V supply to CAN transceivers and window motor drivers in BCMs. IC Role / Device Role / Timing Role: Secondary Zener regulator backing up primary DC/DC converter output. Use Value: Maintains 33 V reference stability across –40 °C to +150 °C, enabling accurate current sensing and fault detection. | Use Scenario: Protecting 48 V PoE-powered equipment interfaces from lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Standoff diode in hybrid TVS configuration with bidirectional suppressors. Use Value: Provides precise 33 V clamping threshold to coordinate with upstream MOVs, reducing let-through energy by 35 % vs. generic Zeners. |
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 | Higher 600 W peak power but wider 31.4–34.6 V VBR range (5 % tolerance); larger SMB package (4.6 × 3.9 mm) | Preferred for higher-energy transients where board space allows; not AEC-Q101 qualified | Select when surge energy exceeds 150 W and AEC-Q101 is not required |
| BZX84-C33-HE3-08 | Same 33 V nominal rating but ±5 % tolerance, 300 mW Ptot, SOT-23 package; no surge rating specified | Limited to low-power signal-level protection; unsuitable for power rail clamping | Choose only for cost-sensitive, non-automotive signal conditioning where surge immunity is secondary |
Compared with SMBJ33A-E3/52, BZD27B33P-HE3_A18 offers tighter voltage tolerance and automotive qualification in a smaller footprint, while BZX84-C33-HE3-08 lacks surge capability and thermal robustness needed for power rail protection.
Availability
BZD27B33P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and telecom power interface applications requiring stable component supply, AEC-Q101 compliance, and consistent 33 V clamping performance.
Supply support for BZD27B33P-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 automotive, industrial, and computing markets.
The BZD27B Series targets automotive-grade Zener regulation and transient suppression, designed specifically to meet stringent AEC-Q101 requirements and replace legacy through-hole devices in space-constrained power systems.
FAQ
What is the Zener voltage tolerance of BZD27B33P-HE3_A18?
BZD27B33P-HE3_A18 has a Zener voltage tolerance of ±2 %, with a specified range of 32.34 V to 33.66 V at 25 mA test current. This tight tolerance enables precise voltage regulation in automotive and industrial applications where reference accuracy directly impacts system reliability. The value is measured under standard conditions per the Vishay BZD27B Series datasheet Rev. 2.1.
Is BZD27B33P-HE3_A18 qualified for automotive use?
Yes, BZD27B33P-HE3_A18 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and ESD (>8 kV HBM), making it suitable for under-hood engine control units and body electronics. This qualification is documented in Vishay's official BZD27B Series specification sheet.
What is the maximum clamping voltage of BZD27B33P-HE3_A18 during surge events?
The maximum clamping voltage of BZD27B33P-HE3_A18 is 44.4 V at a peak surge current of 5 A (10/1000 μs waveform). This value ensures safe operation during ISO 7637-2 Pulse 5a load-dump events in 24 V automotive systems. The clamping behavior is verified per IEC 61000-4-5 and confirmed in the Electrical Characteristics table of the BZD27B Series datasheet.
Which package does BZD27B33P-HE3_A18 use, and what are its dimensions?
BZD27B33P-HE3_A18 uses the DO-219AB (SMF) surface-mount package: 2.7 mm × 3.5 mm body length/width, 0.85 mm maximum height, with cathode identified by a band on the top surface. Its footprint matches SOD-123W layouts, enabling drop-in replacement in space-constrained designs. Package dimensions are defined in Vishay document S8-V-3915.01-001.
Does BZD27B33P-HE3_A18 support lead-free reflow soldering?
Yes, BZD27B33P-HE3_A18 is RoHS-compliant and rated for wave and reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1. Its molding compound is UL 94 V-0 rated, and the device passes whisker testing per JESD 201 Class 2. These attributes are explicitly stated in the "PACKAGE" section of the Vishay BZD27B Series datasheet.
BZD27B33P-HE3_A18 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_A18 FAQ
1.How can I place an order for BZD27B33P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B33P-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 BZD27B33P-HE3_A18 reliable?
The price and inventory of BZD27B33P-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 BZD27B33P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B33P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B33P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B33P-HE3_A18?
BZD27B33P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B33P-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 BZD27B33P-HE3_A18?
For technical support, including BZD27B33P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B33P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B33P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B33P-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 BZD27B33P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B33P-HE3_A18?
All BZD27B33P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B33P-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 BZD27B33P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B33P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B33P-HE3_A18 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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 …
