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onsemi SZMMBZ5262BLT1G
- Part No.:
- SZMMBZ5262BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5262BLT1G.pdf
- Description:
- DIODE ZENER 51V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:410
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Product details
Overview
SZMMBZ5262BLT1G from onsemi is a 51 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 1100 Ω dynamic impedance at 2.5 mA test current and 0.1 μA leakage at 39 V reverse bias - used for precision voltage clamping in automotive sensor signal conditioning circuits.
For engineers reviewing the SZMMBZ5262BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under transient overvoltage conditions. Its 51 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift across −65°C to +150°C junction range.
The SOT-23 package features void-free thermosetting plastic construction, UL 94 V-0 flammability rating, and 260°C/10s soldering tolerance. Pin 2 is internally unconnected - confirmed by mechanical outline Style 8 and electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.45 V min / 51 V nom / 53.55 V max @ IZT = 2.5 mA - defines clamping threshold with ±5% tolerance for automotive-grade stability. |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous clamp energy before thermal derating begins at 1.8 mW/°C. |
| Zener Impedance (ZZT) | 1100 Ω max @ IZT = 2.5 mA - determines AC regulation stiffness; critical for suppressing fast transients in CAN/LIN bus protection. |
| Leakage Current (IR) | 0.1 μA max @ VR = 39 V - ensures minimal standby current draw in always-on vehicle subsystems. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables direct placement on exposed I/O lines without external ESD diodes. |
| Junction Temp Range | −65°C to +150°C - supports operation in engine bay and powertrain control modules without derating. |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems requiring PPAP documentation and lot traceability. |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, 1.90 mm lead pitch, Pb-free and RoHS compliant. Cathode identified by band marking on terminal 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node during Zener conduction; must be routed with low-inductance path for transient response. |
| 2 | No Connection | Internally isolated; no PCB trace or pad required - avoids accidental shorting in automated assembly. |
| 3 | Cathode | Connected to regulated rail or protected signal line; polarity band aligns with schematic symbol cathode marking. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | SZ-prefix indicates AEC-Q101 qualification and PPAP capability - required for Tier 1 supplier BOMs in ADAS and body control modules. |
| High-Density Packaging | SOT-23 footprint occupies <1.5 mm² PCB area - enables placement adjacent to IC pins for local rail clamping without routing congestion. |
| ESD Robustness | 16 kV HBM rating eliminates need for discrete ESD protection on 12 V sensor inputs - reduces BOM count and layout complexity. |
| Thermal Performance | 556 °C/W junction-to-ambient resistance on FR-5 board allows sustained 225 mW operation at ambient ≤85°C - suitable for under-hood environments. |
| Low-Leakage Regulation | 0.1 μA max reverse leakage at 39 V ensures <10 nW standby power loss - critical for battery-backed telematics modules. |
Applications
| Automotive Sensor Interface | CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Clamping transient spikes on analog outputs of pressure/temperature sensors in engine control units. IC Role / Device Role / Timing Role: Two-terminal Zener voltage clamp placed between sensor output and ground, conducting only during overvoltage events. Use Value: Prevents damage to downstream ADC inputs while maintaining signal integrity below 51 V - validated for ISO 7637-2 pulse 5a compliance. |
Use Scenario: Protecting CANH/CANL lines from load dump and jump-start surges in vehicle infotainment gateways. IC Role / Device Role / Timing Role: Bidirectional clamping pair (SZMMBZ5262BLT1G + complementary low-voltage Zener) shunting excess energy to ground/rail. Use Value: Limits bus voltage to safe levels (<53.55 V) without affecting 0–5 V differential signaling - maintains CAN FD timing margins. |
| Body Control Module Power Rail | ADAS Camera Power Conditioning |
|
Use Scenario: Stabilizing 5 V supply rails feeding microcontrollers and LIN transceivers in door module ECUs. IC Role / Device Role / Timing Role: Shunt regulator providing coarse voltage hold-up during battery brownouts, supplementing LDO performance. Use Value: Extends functional uptime by >20 ms during 6–9 V input dips - meets ISO 16750-2 Class IV requirements. |
Use Scenario: Guarding image sensor power inputs against ESD events during camera module handling and installation. IC Role / Device Role / Timing Role: Primary ESD clamp on 3.3 V AVDD line, activated within <1 ns of 8 kV contact discharge. Use Value: Absorbs >150 mJ per event without parametric shift - preserves pixel uniformity and prevents hot pixel generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5262BLT1G | Same Zener voltage (48.45–53.55 V), identical SOT-23 package, but not AEC-Q101 qualified; 225 mW rating unchanged. | Lacks PPAP support and automotive traceability - restricted to consumer or industrial designs without automotive certification requirements. | Select MMBZ5262BLT1G only when automotive qualification is unnecessary and cost sensitivity outweighs long-term supply assurance. |
| SZMMBZ5251BLT1G | Lower Zener voltage (20.9–23.1 V), same AEC-Q101 qualification, identical thermal and ESD specs, same SOT-23 footprint. | Used for 24 V system rail clamping instead of 48 V/51 V - applicable in chassis electronics where lower clamp thresholds are mandated. | Choose SZMMBZ5251BLT1G when protecting 24 V CAN or LIN networks; not interchangeable with SZMMBZ5262BLT1G due to voltage mismatch. |
Compared with MMBZ5262BLT1G, SZMMBZ5262BLT1G adds AEC-Q101 qualification and PPAP capability without sacrificing electrical performance - making it the sole choice for automotive production. Compared with SZMMBZ5251BLT1G, it provides higher-voltage clamping essential for 48 V mild-hybrid architectures and next-gen ADAS power domains.
Availability
SZMMBZ5262BLT1G is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus protection, body control module power rails, and ADAS camera power conditioning requiring stable component supply across extended temperature ranges and automotive lifecycle demands.
Supply support for SZMMBZ5262BLT1G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications - with core expertise in power management, analog, and sensing technologies.
SZMMBZ5262BLT1G belongs to the SZMMBZ52xxBLT1G series of AEC-Q101-qualified Zener diodes, engineered specifically for automotive signal integrity and power rail protection in harsh environments.
FAQ
What is the Zener voltage tolerance of SZMMBZ5262BLT1G?
The SZMMBZ5262BLT1G has a Zener voltage specification of 48.45 V minimum, 51 V nominal, and 53.55 V maximum at 2.5 mA test current - representing a tight ±5% tolerance band essential for repeatable clamping in automotive safety-critical circuits. This tolerance is guaranteed across the full −65°C to +150°C operating junction temperature range, and the SZMMBZ5262BLT1G datasheet confirms no additional derating is required for temperature variation within this span.
Is SZMMBZ5262BLT1G pin-compatible with MMBZ5262BLT1G?
Yes, SZMMBZ5262BLT1G is mechanically and electrically pin-compatible with MMBZ5262BLT1G - both use SOT-23 package with identical pinout (Pin 1: Anode, Pin 2: NC, Pin 3: Cathode), same marking layout, and matching thermal and electrical specifications. However, the SZMMBZ5262BLT1G carries AEC-Q101 qualification and PPAP documentation, while MMBZ5262BLT1G does not - so physical replacement is possible but automotive compliance requires the SZ prefix version.
What is the maximum power dissipation of SZMMBZ5262BLT1G on FR-5 board?
SZMMBZ5262BLT1G is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature, with linear derating of 1.8 mW/°C above that point. This value is defined in the Maximum Ratings table of the official onsemi datasheet and reflects real-world thermal performance on standard 1.0 × 0.75 × 0.62 inch FR-5 test boards - enabling accurate thermal margin calculation for engine control unit PCB layouts.
Does SZMMBZ5262BLT1G support high-reliability automotive applications?
Yes, SZMMBZ5262BLT1G is explicitly AEC-Q101 qualified and PPAP capable, with manufacturing site and process controls meeting automotive quality standards. The "SZ" prefix denotes dedicated automotive flow, including enhanced traceability, lot-level testing, and failure analysis protocols - making SZMMBZ5262BLT1G suitable for ASIL-B compliant systems such as powertrain sensors and ADAS domain controllers.
What is the ESD rating of SZMMBZ5262BLT1G?
SZMMBZ5262BLT1G achieves Class 3 ESD robustness per Human Body Model (HBM) with >16 kV rating - verified per JEDEC JS-001. This level of protection allows direct integration on exposed automotive I/O lines without supplemental ESD components, reducing bill-of-materials and improving signal path integrity for LIN and SENT sensor interfaces using SZMMBZ5262BLT1G.
SZMMBZ5262BLT1G 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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 39 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)
SZMMBZ5262BLT1G FAQ
1.How can I place an order for SZMMBZ5262BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5262BLT1G 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 SZMMBZ5262BLT1G reliable?
The price and inventory of SZMMBZ5262BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5262BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5262BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5262BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5262BLT1G?
SZMMBZ5262BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5262BLT1G 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 SZMMBZ5262BLT1G?
For technical support, including SZMMBZ5262BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5262BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5262BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5262BLT1G 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 SZMMBZ5262BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5262BLT1G?
All SZMMBZ5262BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5262BLT1G, 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 SZMMBZ5262BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5262BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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