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onsemi SZMMBZ5270BLT1G
- Part No.:
- SZMMBZ5270BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5270BLT1G.pdf
- Description:
- DIODE ZENER 91V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,900
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Product details
Overview
SZMMBZ5270BLT1G from onsemi is a 91 V Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 1.4 mA test current (IZT), 2300 Ω dynamic impedance (ZZT), and 0.1 μA leakage current at 69 V reverse voltage - used for precision voltage regulation in space-constrained DC power rails.
For engineers reviewing the SZMMBZ5270BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), AEC-Q101 qualification, ESD rating (>16 kV HBM), and Pb-free RoHS compliance.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at 91 V nominal (86.45–95.55 V range) when biased above its knee current. It exhibits a positive temperature coefficient near +6.5 mV/°C per typical characterization curves.
Designed for surface-mount assembly on high-density PCBs, it features a cathode-banded polarity marking, no internal connection on pin 2, and thermal performance validated on FR-5 (225 mW) and alumina (300 mW) substrates - supporting stable regulation under transient overvoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 86.45–95.55 V at IZT = 1.4 mA - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 2300 Ω @ IZT = 1.4 mA - indicates voltage regulation stability under small-signal AC variations |
| Leakage Current (IR) | 0.1 μA @ VR = 69 V - ensures minimal standby current draw in low-power standby modes |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in automated assembly and end-use environments |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial control applications |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronics per stress-test requirements |
Pinout & Package
SOT-23 (TO-236) package: 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case, corrosion-resistant finish, UL 94 V-0 flammability rating, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | DC input terminal; connects to lower-potential side of regulated node |
| 2 | No Connection | Internally unconnected; must remain floating - not tied to ground or bias |
| 3 | Cathode | DC output terminal; referenced to system ground or return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | AEC-Q101 qualified and PPAP capable - meets automotive supply chain traceability and reliability requirements |
| Pb-free / RoHS compliance | Fully compliant with EU RoHS Directive and halogen-free/BFR-free standards - supports green manufacturing |
| High-density packaging | SOT-23 footprint enables placement on >10-layer PCBs with <0.5 mm trace spacing - ideal for smartphone PMIC rails |
| ESD-hardened construction | Class 3 HBM (>16 kV) - eliminates need for external ESD protection in handheld product front-end stages |
| Stable high-voltage regulation | 91 V nominal with ±5% tolerance and +6.5 mV/°C TC - suitable for telecom line-card surge suppression and sensor excitation |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from load-dump transients up to 120 V in 12 V vehicle systems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping voltage at 91 V before downstream circuitry. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a events without requiring active control logic. |
Use Scenario: Safeguarding analog input channels of 24 V DC-powered programmable logic controllers against field-wiring surges. IC Role / Device Role / Timing Role: Passive overvoltage clamp placed between signal line and ground rail. Use Value: Limits transient energy to <100 mJ while maintaining <1 nA leakage at 24 V operating point. |
| Medical Infusion Pump Power Rail | 5G Base Station Bias Supply |
Use Scenario: Stabilizing auxiliary 48 V DC-DC converter feedback node in battery-backed infusion pumps. IC Role / Device Role / Timing Role: Precision voltage reference for error amplifier compensation network. Use Value: Maintains ±0.5% output regulation across −25°C to +70°C ambient with <5 ppm/°C drift contribution. |
Use Scenario: Providing stable bias voltage for GaN FET gate drivers in remote radio head power amplifiers. IC Role / Device Role / Timing Role: High-voltage Zener reference in isolated gate drive bootstrap circuit. Use Value: Enables fast turn-on with <10 ns response to 100 V/ns dV/dt transients due to low junction capacitance (~1.2 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C91LT1G | Same 91 V nominal, but 350 mW rating on FR-4, higher IZT (5 mA), no AEC-Q101 qualification | Not suitable for automotive use; better for general-purpose industrial boards with higher power margin | Select when higher power headroom is needed and automotive qualification is unnecessary |
| SZBZX84C91LT3G | 91 V nominal, AEC-Q101 qualified, 350 mW rating, SOT-23 package, but larger ZZT (3000 Ω) | Higher power capability trades off regulation precision - less stable under low-current bias conditions | Choose when system requires >250 mW clamping energy and can tolerate reduced dynamic impedance performance |
Compared with SZMMBZ5270BLT1G, BZX84-C91LT1G offers higher power but lacks automotive qualification, while SZBZX84C91LT3G provides AEC-Q101 compliance and greater power at the cost of 30% higher dynamic impedance - impacting regulation accuracy in low-current sensing paths.
Availability
SZMMBZ5270BLT1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, medical infusion pump power rails, and 5G base station bias supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMBZ5270BLT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications - focused on enabling sustainable technology.
SZMMBZ5270BLT1G belongs to the AEC-Q101-qualified SZMMBZ52xxBLT1G Zener diode family, engineered specifically for automotive and high-reliability industrial voltage regulation where space, ESD robustness, and thermal stability are critical.
FAQ
What is the exact Zener voltage tolerance for SZMMBZ5270BLT1G?
The SZMMBZ5270BLT1G has a Zener voltage range of 86.45 V to 95.55 V at IZT = 1.4 mA, corresponding to a ±5% tolerance around the nominal 91 V value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is verified per AEC-Q101 stress testing protocols.
Is SZMMBZ5270BLT1G pin-compatible with standard MMBZ5270BLT1G?
Yes, SZMMBZ5270BLT1G shares identical SOT-23 pinout (pin 1: anode, pin 2: NC, pin 3: cathode), mechanical dimensions, and electrical specifications with MMBZ5270BLT1G - the "SZ" prefix denotes automotive-grade screening and PPAP capability, not physical or electrical differentiation.
What is the maximum allowable continuous power dissipation for SZMMBZ5270BLT1G on a standard FR-5 PCB?
SZMMBZ5270BLT1G is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient, derating linearly by 1.8 mW/°C above that temperature. At 85°C ambient, usable power drops to 117 mW - a critical constraint for enclosed automotive junction boxes.
Does SZMMBZ5270BLT1G require external heat sinking in typical applications?
No, SZMMBZ5270BLT1G does not require external heat sinking in standard applications because its thermal resistance (RJA = 556 °C/W on FR-5) limits junction temperature rise to <125°C at 225 mW and 25°C ambient - well within the −65°C to +150°C rated range. Layout should maintain ≥0.5 mm copper clearance around the pad.
How does the ESD rating of SZMMBZ5270BLT1G impact system-level design?
SZMMBZ5270BLT1G's Class 3 HBM rating (>16 kV) allows direct placement at board edges or connector interfaces without supplemental TVS devices in many handheld and automotive applications - reducing BOM count and PCB area while maintaining IEC 61000-4-2 Level 4 immunity.
SZMMBZ5270BLT1G 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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 69 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)
SZMMBZ5270BLT1G FAQ
1.How can I place an order for SZMMBZ5270BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5270BLT1G 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 SZMMBZ5270BLT1G reliable?
The price and inventory of SZMMBZ5270BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5270BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5270BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5270BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5270BLT1G?
SZMMBZ5270BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5270BLT1G 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 SZMMBZ5270BLT1G?
For technical support, including SZMMBZ5270BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5270BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5270BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5270BLT1G 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 SZMMBZ5270BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5270BLT1G?
All SZMMBZ5270BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5270BLT1G, 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 SZMMBZ5270BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5270BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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