My Inquiry
My Account
onsemi SZMMBZ5263BLT1G
- Part No.:
- SZMMBZ5263BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5263BLT1G.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMMBZ5263BLT1G from onsemi is a 56 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 1300 Ω dynamic impedance at 2.2 mA test current and 0.1 μA leakage at 43 V reverse bias - used for precision voltage clamping in automotive sensor signal conditioning circuits.
For engineers reviewing the SZMMBZ5263BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), AEC-Q101 qualification, ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 56 V regulation under controlled current conditions. Its nominal Zener voltage of 56 V exhibits a positive temperature coefficient near zero crossing, minimizing drift across −55°C to +150°C operating range.
The SOT-23 package features a defined anode-cathode pinout (Pin 1 = Anode, Pin 2 = NC, Pin 3 = Cathode) and supports automated placement with Pb-free, RoHS-compliant construction. It delivers 225 mW power handling on FR-5 board and 300 mW on alumina substrate, with thermal resistance optimized for surface-mount thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2 V min / 56 V nom / 58.8 V max @ IZT = 2.2 mA - defines clamping threshold accuracy for overvoltage protection circuits. |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling without derating in standard PCB environments. |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 2.2 mA - determines AC voltage variation under load changes; critical for low-noise reference stability. |
| Leakage Current (IR) | 0.1 μA @ VR = 43 V - ensures minimal standby current draw in battery-powered automotive modules. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust operation in unshielded automotive harness interfaces. |
| Operating Temperature | −65°C to +150°C - supports under-hood deployment in engine control units and transmission sensors. |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronic systems per stress-test requirements. |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be routed to ground or reference rail for clamping. |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or solder joint allowed. |
| Pin 3 | Cathode | Connected to higher-potential node (e.g., protected signal line); polarity band aligns with this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | AEC-Q101 qualified and PPAP capable - enables direct use in Tier-1 automotive ECUs without additional qualification effort. |
| Pb-free and RoHS compliance | Fully compliant with EU RoHS Directive 2011/65/EU and halogen-free/BFR-free - meets global environmental manufacturing requirements. |
| High-density packaging | SOT-23 footprint (2.9 × 1.3 mm) enables placement in space-constrained modules like ABS wheel speed sensor assemblies. |
| ESD-hardened design | Class 3 HBM rating (>16 kV) eliminates need for external ESD protection in CAN/LIN bus interface nodes. |
| Thermal performance | 556 °C/W junction-to-ambient thermal resistance on FR-5 board - supports reliable operation at 125°C ambient in engine bay applications. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping transient spikes on 5V sensor supply rails during load dump events in gasoline/diesel engine control modules. IC Role / Device Role / Timing Role: Two-terminal Zener clamp protecting downstream ADC inputs and microcontroller I/O pins from >60 V transients. Use Value: Maintains 56 V breakdown threshold with ±5% tolerance, preventing latch-up while allowing normal 5 V operation below clamping voltage. |
Use Scenario: Stabilizing reference voltage for 4–20 mA current loop transmitters in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable bias point for op-amp-based current source circuitry. Use Value: Delivers 0.1 μA leakage at 43 V, ensuring <100 nA error contribution to loop accuracy over full temperature range. |
| Automotive Body Control Module (BCM) | Consumer Portable Power Management |
Use Scenario: Overvoltage protection for LIN bus physical layer receivers exposed to battery voltage surges in door module electronics. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing energy from 12 V rail transients before reaching LIN transceiver IC. Use Value: 1300 Ω dynamic impedance limits voltage overshoot to <±0.5 V during 100 ns pulses, preserving signal integrity. |
Use Scenario: Voltage limiting in USB-C PD adapter auxiliary power rails where compact size and low leakage are mandatory. IC Role / Device Role / Timing Role: Standby-mode Zener suppressor guarding LDO enable inputs against accidental 24 V misconnection. Use Value: SOT-23 footprint fits within 2.5 mm² area budget; 0.1 μA leakage extends battery shelf life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C56LT1G | 56 V ±5%, 300 mW rating, 60 Ω ZZT @ 5 mA - lower impedance but non-AEC-Q101, higher leakage (1 μA @ 45.6 V). | Targeted at industrial/commercial power supplies, not automotive-grade signal protection. | Select when lower dynamic impedance is prioritized over automotive qualification and ultra-low leakage. |
| SZBZX84C56LT1G | 56 V ±5%, AEC-Q101 qualified, 300 mW, 60 Ω ZZT @ 5 mA - same qualification as SZMMBZ5263BLT1G but higher power and lower impedance. | Used in higher-current clamping roles (e.g., 12 V rail protection), not low-leakage precision references. | Choose for applications needing both automotive qualification and sub-100 Ω impedance, accepting larger leakage and different thermal profile. |
Compared with BZX84-C56LT1G and SZBZX84C56LT1G, SZMMBZ5263BLT1G offers uniquely low leakage (0.1 μA) and tighter thermal resistance control (556 °C/W) in a 225 mW-rated part, making it optimal for low-power automotive sensor interfaces where standby current and thermal margin are critical.
Availability
SZMMBZ5263BLT1G is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and portable power adapters requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SZMMBZ5263BLT1G 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was designed specifically for space-constrained, high-reliability voltage regulation in automotive and industrial electronics - emphasizing AEC-Q101 qualification, ultra-low leakage, and SOT-23 manufacturability.
FAQ
What is the Zener voltage tolerance of SZMMBZ5263BLT1G?
The SZMMBZ5263BLT1G has a Zener voltage specification of 53.2 V minimum, 56 V nominal, and 58.8 V maximum at 2.2 mA test current - representing a ±5% tolerance band around the nominal value. This tolerance is verified per onsemi's production testing and applies across the full operating temperature range of −65°C to +150°C, as confirmed in the Electrical Characteristics table on page 3 of the official datasheet.
Is SZMMBZ5263BLT1G suitable for automotive applications?
Yes, SZMMBZ5263BLT1G is explicitly AEC-Q101 qualified and PPAP capable, with the "SZ" prefix denoting automotive-specific site and process controls. It meets stringent stress-test requirements for temperature cycling, humidity, and mechanical shock, and is rated for operation from −65°C to +150°C - making it approved for use in engine control units, body control modules, and other under-hood automotive systems.
What is the thermal resistance of SZMMBZ5263BLT1G on standard PCB material?
The junction-to-ambient thermal resistance (RJA) of SZMMBZ5263BLT1G is 556 °C/W when mounted on an FR-5 board (1.0 × 0.75 × 0.62 in), as specified in the Maximum Ratings table. This value assumes standard 1 oz copper traces and defines the temperature rise per milliwatt of dissipated power - critical for thermal design in enclosed automotive enclosures.
Does SZMMBZ5263BLT1G have a no-connect pin, and how should it be handled?
Yes, SZMMBZ5263BLT1G has Pin 2 designated as "No Connection" per the marking diagram and mechanical outline (Style 8). This terminal is internally unconnected and must remain electrically floating - no PCB trace, solder mask opening, or thermal pad should contact Pin 2. Incorrect routing or solder bridging to Pin 2 may cause functional failure or parametric shift.
What is the ESD rating of SZMMBZ5263BLT1G, and how is it tested?
SZMMBZ5263BLT1G is rated Class 3 per the Human Body Model (HBM), meaning it withstands >16 kV electrostatic discharge. This rating is verified during onsemi's qualification testing per JESD22-A114 and is intrinsic to the device structure - no external ESD protection is required for typical automotive harness interface scenarios involving LIN or analog sensor lines.
SZMMBZ5263BLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5263BLT1G FAQ
1.How can I place an order for SZMMBZ5263BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5263BLT1G 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 SZMMBZ5263BLT1G reliable?
The price and inventory of SZMMBZ5263BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5263BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5263BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5263BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5263BLT1G?
SZMMBZ5263BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5263BLT1G 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 SZMMBZ5263BLT1G?
For technical support, including SZMMBZ5263BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5263BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5263BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5263BLT1G 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 SZMMBZ5263BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5263BLT1G?
All SZMMBZ5263BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5263BLT1G, 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 SZMMBZ5263BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5263BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ5263BLT1G 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
