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Diodes Incorporated 1SMB5927B-13
- Part No.:
- 1SMB5927B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB5927B-13.pdf
- Description:
- DIODE ZENER 12V 550MW SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,279
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Product details
Overview
1SMB5927B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with nominal zener voltage of 12.0V (±5% tolerance), 31.2Ω dynamic impedance at 6.5mA test current, and 125µA maximum reverse leakage at 9.1V. It operates across –65°C to +150°C and is used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the 1SMB5927B-13 datasheet, 1SMB5927B-13 pinout, 1SMB5927B-13 application, or 1SMB5927B-13 equivalent, key selection criteria include zener voltage stability under thermal stress, low dynamic impedance for tight regulation, ESD robustness (>16kV HBM), and SMB package compatibility with automated SMT assembly.
Technical Context
This Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its 12.0V nominal zener voltage is specified at 6.5mA test current, with temperature coefficient optimized near the 12V range per Figure 2 of DS32125 Rev. 8–2.
The device delivers 3.0W power dissipation at TL = +75°C with 25°C/W junction-to-terminal thermal resistance, and derates linearly above that temperature. Its 226°C/W junction-to-ambient resistance assumes FR-4 PCB mounting per AP02001 pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12.0 V ±5% - defines regulated output voltage under 6.5 mA bias; stable across industrial temperature range |
| Power Dissipation | 3.0 W @ TL = +75°C - supports high-energy transient clamping without thermal runaway when properly heatsinked |
| Zener Impedance | 31.2 Ω @ IZT = 6.5 mA - ensures <0.2V output deviation for ±20mA load current variation |
| Reverse Leakage Current | 125 µA @ VR = 9.1 V - confirms low standby power loss in always-on regulation circuits |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into unshielded I/O or power input stages without external ESD protection |
| Operating Temperature | –65°C to +150°C - suitable for under-hood automotive, industrial motor drives, and outdoor power supplies |
| Package | SMB (DO-214AA) - standardized 3.3–3.94 mm × 4.06–4.57 mm footprint compatible with IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with cathode band marking; polarity identified by single black band on cathode end; weight ≈ 0.096 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; forms reference ground for shunt regulation topology |
| Cathode | Reverse-bias terminal / Zener breakdown node | Connected to regulated voltage node; sinks current to maintain 12.0V across load during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 3.0W power rating at TL = +75°C | Enables robust overvoltage clamping in 12V automotive and industrial power rails without external heatsinking |
| ±5% zener voltage tolerance | Guarantees 11.4–12.6V regulation window at 25°C, reducing need for post-production trimming |
| ESD Class 3 (>16kV HBM) | Eliminates requirement for discrete TVS diodes in board-level ESD protection schemes |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity Level 1 and global environmental compliance mandates |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Regulates 12V supply rail feeding microcontroller I/O buffers and CAN transceivers in harsh under-dash environments. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining stable 12V reference despite battery transients up to ±100V. Use Value: Prevents latch-up in 3.3V/5V logic ICs during load dump events while consuming <125µA quiescent current. | Use Scenario: Clamps induced surges on 4–20mA current loop inputs exposed to field wiring noise and lightning-induced spikes. IC Role / Device Role / Timing Role: Fast-response overvoltage protector limiting analog front-end input to ≤12.6V during 1kV/µs transients. Use Value: Maintains signal integrity without adding series resistance or propagation delay-critical for sub-10µs response time requirements. |
| Telecom Power Supply Monitoring | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Provides precise 12V reference for ADC-based monitoring of +48V telecom rectifier outputs. IC Role / Device Role / Timing Role: Voltage reference element in feedback divider network for isolated DC-DC converters. Use Value: Delivers <0.5% long-term drift over 10-year service life due to low thermal coefficient and stable Zener structure. | Use Scenario: Enables safe power-up sequencing of FPGA, ADC, and analog front-end ICs by holding reset until 12V rail stabilizes. IC Role / Device Role / Timing Role: Threshold detector via comparator biasing, leveraging sharp Zener knee at 12.0V. Use Value: Achieves ±0.3V trip point accuracy across –20°C to +70°C ambient, eliminating need for trim potentiometers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5927B | Dual-in-line through-hole package (DO-41); same 12V zener voltage and ±5% tolerance but higher RθJA (500°C/W) | Limited to low-power, non-SMT designs; unsuitable for high-density PCBs or automated assembly | Select only for legacy repair or prototyping where manual soldering is acceptable |
| BZX85C12 | 1.3W power rating; 12V zener voltage with ±5% tolerance; TO-204AA (DO-41) package; higher ZZT (40Ω) | Lower energy handling capacity; requires derating above +50°C ambient; not rated for >16kV HBM | Choose for cost-sensitive consumer applications where surge immunity and thermal margin are secondary |
Compared with 1SMB5927B-13, 1N5927B offers identical electrical specs but lacks SMT compatibility and thermal performance, while BZX85C12 trades 58% lower power handling and reduced ESD robustness for lower unit cost in non-industrial settings.
Availability
1SMB5927B-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input protection, and telecom power supply monitoring requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1SMB5927B-13 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 centers across Asia and manufacturing in Taiwan and China.
The SMB-series Zener diodes are engineered for high-reliability voltage regulation and transient suppression in automotive, industrial, and telecom infrastructure, emphasizing thermal robustness, ESD resilience, and SMT manufacturability.
FAQ
What is the maximum peak pulse power this Zener can handle?
The 1SMB5927B-13 sustains up to 1.2 kW peak pulse power for 1 ms duration (Figure 10), corresponding to a 100 A transient at 12 V. This capability derives from its 3.0 W steady-state rating and low thermal resistance, enabling protection against ISO 7637-2 Load Dump pulses without degradation.
Does this part require a heatsink in standard PCB mounting?
No external heatsink is required for continuous operation at ≤1.5 W dissipation on a standard FR-4 PCB with Diodes Inc.'s AP02001-recommended pad layout. At full 3.0 W, thermal derating begins above +75°C lead temperature, and board copper area must exceed 100 mm² per terminal to maintain safe junction temperatures.
How does the zener voltage change with temperature?
At 12 V nominal, the temperature coefficient is approximately +5.5 mV/°C (Figure 2), meaning zener voltage increases by ~0.55 V over a 100°C rise. This positive TC balances negative TC elements in feedback networks, improving overall system regulation stability across –40°C to +125°C.
Is the SMB package compatible with reflow soldering per J-STD-020?
Yes-the SMB package has Moisture Sensitivity Level 1 per J-STD-020, permitting unlimited floor life and standard Pb-free reflow profiles (peak 260°C, 20–40 sec). Matte tin-plated copper alloy leadframe ensures reliable wetting and intermetallic formation without voiding or dewetting risks.
1SMB5927B-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB5927B-13 FAQ
1.How can I place an order for 1SMB5927B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB5927B-13 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 1SMB5927B-13 reliable?
The price and inventory of 1SMB5927B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5927B-13 is usually 5 days.
3.What payment methods are accepted for 1SMB5927B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5927B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB5927B-13?
1SMB5927B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB5927B-13 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 1SMB5927B-13?
For technical support, including 1SMB5927B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5927B-13 requirements.
6.How does Aetrix verify that 1SMB5927B-13 is sourced from the original manufacturer or authorized distributors?
All 1SMB5927B-13 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 1SMB5927B-13 meets industry standards.
7.What is the process for return or replacement of 1SMB5927B-13?
All 1SMB5927B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5927B-13, 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 1SMB5927B-13 part is unused and in its original packaging.
Return procedure for 1SMB5927B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB5927B-13 Tags
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Diodes Incorporated
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