My Inquiry
My Account
Diodes Incorporated BZT52C30SQ-7-F
- Part No.:
- BZT52C30SQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C30SQ-7-F.pdf
- Description:
- DIODE ZENER 30V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,998
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52C30SQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 30 V, ±6.7% tolerance (28.0–32.0 V), 2 mA test current, 80 Ω maximum zener impedance at 2 mA, and 200 mW power dissipation in SOD323 package. It provides precise voltage regulation in low-power biasing and reference circuits for automotive and industrial control modules.
For engineers reviewing the BZT52C30SQ-7-F datasheet, BZT52C30SQ-7-F pinout, BZT52C30SQ-7-F application, or BZT52C30SQ-7-F equivalent, key selection criteria include zener voltage stability over temperature (21.0 mV/°C coefficient), low leakage (<0.1 µA at 24.4 V), AEC-Q101 qualification, and SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the cathode-band polarity marking enables unambiguous orientation during automated placement.
The device is rated for operation from −65 °C to +150 °C and exhibits thermal resistance of 625 °C/W junction-to-ambient on FR-4 board with recommended pad layout. Derating begins above 25 °C ambient per the published power derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, 28.0–32.0 V range at IZT = 2 mA - defines regulation setpoint with ±6.7% initial tolerance |
| Power Dissipation (PD) | 200 mW - limits continuous steady-state power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 80 Ω max at 2 mA - determines AC regulation error under dynamic load changes |
| Reverse Leakage (IR) | <0.1 µA at VR = 24.4 V - ensures minimal quiescent current in standby bias networks |
| Temp. Coefficient (αVZ) | +21.0 mV/°C - quantifies positive drift of zener voltage with rising junction temperature |
| Package | SOD323 - 1.3 mm × 1.7 mm surface-mount outline with 0.3 mm lead width, optimized for pick-and-place |
Pinout & Package
SOD323 is a two-terminal surface-mount plastic package with cathode band marking. Terminals are anode and cathode; polarity must be observed for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias connection | Connected to lower-potential side of regulated circuit; forms return path for zener current |
| Cathode | Input node for reverse-bias connection | Marked with band; connected to higher-potential side to enable controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with <900 ppm Br/Cl and <1000 ppm Sb compounds |
| Moisture Sensitivity Level 1 | No floor life limitation; safe for reflow without baking prior to assembly |
| Matte tin-plated alloy 42 leadframe | Ensures reliable solderability per MIL-STD-202, Method 208 |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 30 V reference for analog front-end biasing in ECU microcontroller ADC subsystems. IC Role / Device Role / Timing Role: Voltage reference diode supplying precision bias to op-amp input stages and voltage dividers. Use Value: Enables accurate sensor measurement within ±0.5% full-scale error despite battery voltage fluctuations from 9–16 V. | Use Scenario: Regulates supply rail for 4–20 mA transmitter ICs in process automation transmitters. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 30 V rail for loop-powered signal conditioning ASICs. Use Value: Maintains loop compliance margin above 24 V while limiting power dissipation to <150 mW under worst-case load. |
| Consumer Power Adapter Overvoltage Clamp | Medical Diagnostic Equipment Bias Network |
Use Scenario: Clamps transient overvoltage spikes on secondary-side DC bus in USB-C PD adapters. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in zener breakdown during surge events. Use Value: Limits peak voltage to ≤32 V with <100 ns response, protecting downstream DC-DC controllers rated for 36 V max. | Use Scenario: Sets reference voltage for photodiode amplifier gain stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference source for precision analog signal chains. Use Value: Delivers <0.8 µV/°C drift contribution and <0.1 µA leakage to preserve SNR >85 dB over 0–40 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5257ET1G | Zener voltage 30 V, ±5%, 5 mA test current, 350 mW PD, SOD-123 package | Larger footprint; higher power rating but less temperature-stable (TC = +24 mV/°C) | Select when board space allows larger package and higher surge energy absorption is required |
| BZX84-C30 | Zener voltage 30 V, ±5%, 5 mA test current, 350 mW PD, SOT-23 package | Three-terminal SOT-23; requires correct pinout identification; higher thermal resistance (750 °C/W) | Prefer where existing SOT-23 land pattern exists and AEC-Q101 is not mandatory |
Compared with MMSZ5257ET1G and BZX84-C30, BZT52C30SQ-7-F offers tighter automotive qualification (AEC-Q101), smaller SOD323 footprint, and lower leakage-making it optimal for space-constrained, high-reliability automotive and industrial designs where long-term voltage stability matters.
Availability
BZT52C30SQ-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and medical diagnostic equipment requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52C30SQ-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT52C series belongs to Diodes' automotive-grade Zener diode product line, engineered specifically for voltage regulation and overvoltage protection in harsh-environment electronic control modules.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C30SQ-7-F?
The nominal zener voltage is 30 V with a guaranteed range of 28.0–32.0 V at 2 mA test current. Breakdown occurs sharply within this band; operation below 24.4 V (the rated reverse voltage VR) yields leakage <0.1 µA. Exceeding 32.0 V risks irreversible avalanche damage if power dissipation exceeds 200 mW.
Is BZT52C30SQ-7-F suitable for use in high-humidity environments?
Yes. The SOD323 package uses UL 94V-0 molded plastic with moisture sensitivity level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. Its matte tin finish and alloy 42 leadframe resist corrosion, supporting reliable operation in humid industrial enclosures.
How does the temperature coefficient affect regulation accuracy over temperature?
With a +21.0 mV/°C coefficient, the zener voltage increases by approximately 2.1 V over a 100 °C junction temperature rise (e.g., from 25 °C to 125 °C). For applications requiring <1% regulation stability, thermal design must limit ΔTJ to ≤14 °C or implement compensation techniques.
Can BZT52C30SQ-7-F replace a through-hole 1N5257B in an existing design?
No direct drop-in replacement: BZT52C30SQ-7-F is SOD323 surface-mount with 30 V zener, while 1N5257B is DO-35 through-hole with same voltage but different thermal behavior, leakage, and mounting. Layout redesign and thermal validation are required; consider MMSZ5257ET1G (SOD-123) as a closer footprint alternative if surface-mount is mandatory.
BZT52C30SQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±6.67%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZT52C30SQ-7-F FAQ
1.How can I place an order for BZT52C30SQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C30SQ-7-F 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 BZT52C30SQ-7-F reliable?
The price and inventory of BZT52C30SQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C30SQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C30SQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C30SQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C30SQ-7-F?
BZT52C30SQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C30SQ-7-F 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 BZT52C30SQ-7-F?
For technical support, including BZT52C30SQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C30SQ-7-F requirements.
6.How does Aetrix verify that BZT52C30SQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C30SQ-7-F 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 BZT52C30SQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C30SQ-7-F?
All BZT52C30SQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C30SQ-7-F, 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 BZT52C30SQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C30SQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52C30SQ-7-F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
