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Diodes Incorporated MMSZ5245BQ-7-F
- Part No.:
- MMSZ5245BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5245BQ-7-F.pdf
- Description:
- DIODE ZENER 15V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,515
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Product details
Overview
MMSZ5245BQ-7-F from Diodes Incorporated is an AEC-Q101-qualified 15 V, ±5% tolerance Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 16 Ω zener impedance at 8.5 mA test current and 0.1 µA reverse leakage at 11 V. It serves as a precision voltage reference or overvoltage clamp in automotive power management circuits.
For engineers reviewing the MMSZ5245BQ-7-F datasheet, MMSZ5245BQ-7-F pinout, MMSZ5245BQ-7-F application, or MMSZ5245BQ-7-F equivalent, key selection criteria include its automotive qualification, tight 15 V nominal zener voltage tolerance, low 0.1 µA leakage at VR = 11 V, and thermal performance under PCB-mounted derating conditions.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents. Its 15 V nominal zener voltage is specified at 8.5 mA test current (IZT), with dynamic impedance of 16 Ω measured at 1 kHz and 0.25 mA knee current (IZK) yielding 600 Ω impedance.
The device features a cathode band polarity marker, matte tin-plated alloy 42 leadframe, and green molding compound compliant with halogen/antimony-free standards. It is qualified to AEC-Q101 for high-reliability automotive use and exhibits a temperature coefficient of approximately +0.06%/°C near 15 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, 14.25–15.75 V range at 8.5 mA - defines regulated output voltage tolerance in reference circuits |
| Power Dissipation | 370 mW at TA = +25°C - sets maximum continuous power under ambient conditions on FR-4 PCB |
| Zener Impedance (ZZT) | 16 Ω at IZT = 8.5 mA, f = 1 kHz - determines voltage regulation stability under small-signal AC variations |
| Reverse Leakage (IR) | 0.1 µA at VR = 11 V - ensures minimal quiescent current draw in standby or low-power clamp applications |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal design margining |
| Operating Temperature | −65 °C to +150 °C - supports extended-range automotive environments including under-hood locations |
Pinout & Package
Package: SOD123 surface-mount plastic case with cathode band marking; dimensions: 1.55 mm × 2.65 mm × 1.05 mm (L × W × H), weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in clamp/reference configuration; forms voltage reference ground reference point |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Provides regulated 15 V output when biased above breakdown; marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress testing |
| Green molding compound | UL 94V-0 rated, halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), compliant with RoHS 2 (2011/65/EU) |
| Automated assembly compatibility | SOD123 footprint optimized for pick-and-place and reflow soldering; moisture sensitivity level 1 per J-STD-020 |
| Low leakage at sub-zener voltage | 0.1 µA IR at VR = 11 V enables energy-efficient clamping in always-on vehicle subsystems |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Protects 12 V supply rail from load-dump transients in BCM microcontroller power domains. IC Role / Device Role / Timing Role: Zener clamp limiting voltage excursions to ≤15.75 V during ISO 7637-2 pulse 5a events. Use Value: Prevents MCU brown-out or latch-up without requiring active TVS devices, reducing BOM count and board space. |
Use Scenario: Stabilizes reference voltage for audio codec ADC in head-unit systems exposed to battery fluctuations. IC Role / Device Role / Timing Role: Provides 15 V precision reference for analog front-end biasing and signal conditioning. Use Value: Maintains <±0.75 V regulation window across −40 °C to +125 °C, ensuring consistent SNR performance. |
| Engine Control Unit (ECU) Sensor Interface | ADAS Camera Module Voltage Reference |
Use Scenario: Supplies stable bias to Hall-effect crankshaft position sensor signal conditioning circuitry. IC Role / Device Role / Timing Role: Acts as shunt regulator establishing fixed 15 V reference for op-amp gain-setting networks. Use Value: Enables <0.5% full-scale error in sensor output over lifetime, meeting ASIL-B functional safety requirements. |
Use Scenario: Regulates voltage for image sensor analog supply in rear-view camera modules operating under stop-start conditions. IC Role / Device Role / Timing Role: Functions as low-leakage voltage clamp protecting CIS analog supply from alternator ripple spikes. Use Value: Limits voltage overshoot to ≤15.75 V while drawing only 0.1 µA standby current, extending module battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15-7-F | 15 V, ±5%, 300 mW rating, SOT-23 package, 20 Ω ZZT at 5 mA | Lower power rating and higher impedance limit use in high-current or precision reference roles | Select for cost-sensitive consumer designs where AEC-Q101 is not required and thermal margin is ample |
| MMSZ5245BS-7-F | Same electrical specs but commercial-grade (non-AEC-Q101), same SOD123 package | Lacks automotive qualification testing; unsuitable for under-hood or safety-critical ECUs | Choose for non-automotive industrial applications needing identical regulation but no automotive reliability validation |
Compared with BZX84-C15-7-F and MMSZ5245BS-7-F, MMSZ5245BQ-7-F uniquely combines AEC-Q101 qualification, 500 mW thermal capability, and 16 Ω low-impedance regulation-making it the only option validated for high-stress automotive voltage reference and clamp functions.
Availability
MMSZ5245BQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power rail protection, and engine control unit sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5245BQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The MMSZ52xxB series targets automotive-grade voltage regulation and transient suppression, designed specifically to meet AEC-Q101 requirements while maintaining tight zener voltage tolerances and low leakage in compact SOD123 packages.
FAQ
What is the maximum continuous power dissipation for MMSZ5245BQ-7-F at +105°C ambient?
At TA = +105°C, the device's power dissipation must be derated linearly from 370 mW at +25°C using the RθJA = 338 °C/W value. This yields a maximum of approximately 250 mW. Derating follows the curve in Figure 1 of DS18010 Rev. 28–2, where PD drops to 500 mW only at TL = +75°C on a defined copper pad layout.
Does MMSZ5245BQ-7-F have a specified capacitance value?
No capacitance value is specified in the DS18010 datasheet for MMSZ5245BQ-7-F. Figure 4 shows typical total capacitance versus nominal zener voltage, estimating ~12 pF for 15 V devices, but this is not a guaranteed parameter and should not be used in timing-critical designs without empirical validation.
Can MMSZ5245BQ-7-F replace MMSZ5245BS-7-F in an existing design?
Yes, electrically and physically - both share identical zener voltage, SOD123 package, and marking. However, MMSZ5245BQ-7-F adds AEC-Q101 qualification, making it suitable for automotive applications where the commercial version is not approved. No layout or schematic changes are needed.
What is the meaning of the 'Q' suffix in MMSZ5245BQ-7-F?
The 'Q' denotes AEC-Q101 qualification per Diodes Incorporated's ordering nomenclature. It distinguishes the automotive-grade variant from the commercial MMSZ5245BS-7-F ('S' suffix) and confirms compliance with stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing.
MMSZ5245BQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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-123
MMSZ5245BQ-7-F FAQ
1.How can I place an order for MMSZ5245BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5245BQ-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 MMSZ5245BQ-7-F reliable?
The price and inventory of MMSZ5245BQ-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 MMSZ5245BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5245BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5245BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5245BQ-7-F?
MMSZ5245BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5245BQ-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 MMSZ5245BQ-7-F?
For technical support, including MMSZ5245BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5245BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5245BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5245BQ-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 MMSZ5245BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5245BQ-7-F?
All MMSZ5245BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5245BQ-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 MMSZ5245BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5245BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5245BQ-7-F Tags
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