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Vishay General Semiconductor - Diodes Division SMBZ5927B-M3/5B
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- Part No.:
- SMBZ5927B-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBZ5927B-M3/5B.pdf
- Description:
- DIODE ZENER 12V 550MW DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,650
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Product details
Overview
SMBZ5927B-M3/5B from Vishay General Semiconductor is a surface-mount Zener voltage-regulating diode with nominal Zener voltage 12 V, maximum Zener impedance 550 Ω at 6.5 mA test current, and power dissipation of 550 mW at 25 °C ambient temperature. It operates in single-diode configuration for precision voltage reference and overvoltage protection in DC power rails.
For engineers reviewing the SMBZ5927B-M3/5B datasheet, SMBZ5927B-M3/5B pinout, SMBZ5927B-M3/5B application, or SMBZ5927B-M3/5B equivalent, key selection criteria include Zener voltage tolerance (±5 %), low regulation factor, MSL level 1 rating, halogen-free RoHS compliance, and SMB (DO-214AA) package thermal performance.
Technical Context
This device functions as a two-terminal, silicon planar Zener diode operating in reverse breakdown to maintain stable voltage across a load. Its design targets regulated DC supply stabilization and transient voltage clamping where tight voltage control and low dynamic impedance are required.
It exhibits a typical Zener temperature coefficient near zero at 12 V, enabling stable reference performance over -55 °C to +150 °C junction temperature range. Thermal resistance from junction to lead is 25 °C/W, supporting reliable power handling when mounted on minimum recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V min / 12.0 V nom / 12.6 V max at IZT = 6.5 mA - defines regulation window under standard test conditions |
| Zener Impedance (ZZT) | 550 Ω max at IZT = 6.5 mA - determines output voltage variation under load current changes |
| Power Dissipation (Ptot) | 550 mW at TA = 25 °C - sets maximum continuous DC power in free-air mounting |
| Reverse Leakage Current (IR) | 1 μA max at VR = 9.1 V - ensures minimal standby current in high-impedance bias networks |
| Maximum Zener Current (IZM) | 125 mA - establishes absolute DC current limit before thermal runaway risk |
| Junction Temperature Range | -55 °C to +150 °C - supports operation in industrial and automotive under-hood environments |
| Thermal Resistance (RθJL) | 25 °C/W - enables effective heat transfer to PCB copper when leads are soldered per J-STD-002 |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by color band; meets UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown reference node | Connected to lower-potential side of regulated circuit; forms reference ground path during reverse operation |
| Cathode | Zener breakdown terminal / voltage clamp input | Connected to higher-potential rail; clamps voltage to VZ when reverse-biased beyond breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener impedance | 550 Ω max at 6.5 mA enables <1 % output voltage deviation under ±10 mA load step changes |
| Halogen-free, RoHS-compliant construction | M3 suffix confirms full compliance with JEDEC JS-016 and IEC 61249-2-21 for green electronics manufacturing |
| MSL Level 1 moisture sensitivity | Rated for peak reflow up to 260 °C without baking - supports standard SMT assembly without preconditioning |
| Stable temperature coefficient | Near-zero TC around 12 V minimizes drift over -40 °C to +85 °C ambient operating range |
| High surge capability | Rated for 300 μs pulses at 1 % duty cycle - suitable for transient suppression in power supply inputs |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing 12 V rail in programmable logic controller (PLC) I/O modules where ±5 % voltage accuracy is required. IC Role / Device Role / Timing Role: Zener diode providing fixed reference voltage for op-amp comparators and ADC bias networks. Use Value: Maintains 12 V regulation within ±0.6 V over temperature and line variations, reducing calibration frequency in field-deployed units. | Use Scenario: Generating stable reference for microcontroller reset circuitry in engine control units exposed to wide ambient swings. IC Role / Device Role / Timing Role: Two-terminal voltage clamp ensuring POR (power-on reset) threshold remains fixed despite battery voltage sag during cranking. Use Value: Delivers consistent 12 V reference with <100 ppm/°C drift, preventing spurious resets during cold-start conditions. |
| DC-DC Converter Feedback Network | Overvoltage Protection in USB-C PD Sink |
Use Scenario: Setting feedback voltage in isolated flyback converter secondary-side regulation loop. IC Role / Device Role / Timing Role: Precision shunt reference replacing TL431 where lower cost and no external bias current are priorities. Use Value: Enables compact, low-component-count feedback with 550 mW dissipation headroom at 6.5 mA test current. | Use Scenario: Clamping VBUS line against overvoltage events during USB-C power delivery negotiation failures. IC Role / Device Role / Timing Role: Fast-acting shunt protector triggered at 12.6 V maximum Zener voltage to divert fault current before downstream IC damage. Use Value: Limits VBUS to ≤12.6 V with 1 μA leakage at 9.1 V, preserving signal integrity while meeting USB-IF electrical compliance thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | Through-hole DO-41 package; 12 V nominal, 1 W Ptot at 25 °C; higher ZZT (22 Ω typical vs. 550 Ω max) | Requires PCB through-hole mounting; less suitable for high-density automated assembly | Select when legacy board compatibility or higher power derating margin is needed |
| BZX84-C12 | SOT-23 package; 12 V nominal; 300 mW Ptot; ZZT = 30 Ω typical at 5 mA; smaller footprint but lower power handling | Limited to low-power signal-level regulation; not rated for >100 mA continuous operation | Select when space-constrained designs prioritize footprint over power robustness |
Compared with 1N4742A and BZX84-C12, SMBZ5927B-M3/5B delivers superior thermal performance in surface-mount layouts, tighter Zener voltage tolerance (±5 %), and MSL Level 1 reflow readiness - making it optimal for modern industrial and automotive SMT production where reliability and process compatibility are critical.
Availability
SMBZ5927B-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, DC-DC converter feedback networks, and USB-C overvoltage protection circuits requiring stable component supply and halogen-free compliance.
Supply support for SMBZ5927B-M3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBZ59xxB series is designed for surface-mount voltage regulation and protection in high-volume industrial and automotive systems, prioritizing low-profile packaging, MSL-1 reflow compatibility, and tight Zener voltage tolerances.
FAQ
What is the Zener voltage tolerance for SMBZ5927B-M3/5B?
The SMBZ5927B-M3/5B has a Zener voltage range of 11.4 V (minimum) to 12.6 V (maximum) at 6.5 mA test current, corresponding to a ±5 % tolerance about the nominal 12 V value. This tolerance is guaranteed across the full operating temperature range and is verified per Vishay's production testing protocol for the SMBZ59xxB family.
Does SMBZ5927B-M3/5B support lead-free reflow soldering?
Yes, SMBZ5927B-M3/5B is rated for MSL Level 1 per J-STD-020 and qualified for peak reflow temperatures up to 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, and the M3 suffix confirms halogen-free, RoHS-compliant construction suitable for lead-free SMT processes without preconditioning.
What is the maximum steady-state power dissipation for SMBZ5927B-M3/5B at 75 °C lead temperature?
The SMBZ5927B-M3/5B supports 3000 mW maximum steady-state power dissipation when lead temperature (TL) is maintained at 75 °C. This rating assumes mounting on the minimum recommended pad layout per Vishay's datasheet Figure 1 and reflects its ability to handle higher pulsed or thermally managed loads compared to its 550 mW ambient-rated limit.
How does the Zener impedance of SMBZ5927B-M3/5B affect regulation accuracy?
The SMBZ5927B-M3/5B specifies maximum Zener impedance of 550 Ω at 6.5 mA test current. This value directly impacts regulation accuracy: for every 1 mA change in load current, output voltage shifts by up to 0.55 V. Designers must account for this in feedback networks or shunt regulator configurations where load transients exceed ±1 mA.
Is SMBZ5927B-M3/5B suitable for overvoltage clamping in 12 V automotive systems?
Yes, SMBZ5927B-M3/5B is widely used for overvoltage clamping in 12 V automotive systems due to its 12 V nominal Zener voltage, -55 °C to +150 °C operating junction temperature range, and robust 125 mA maximum Zener current rating. Its SMB package provides mechanical stability under vibration, and the M3 suffix ensures compliance with automotive-grade material requirements.
SMBZ5927B-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBZ5927B-M3/5B FAQ
1.How can I place an order for SMBZ5927B-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBZ5927B-M3/5B 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 SMBZ5927B-M3/5B reliable?
The price and inventory of SMBZ5927B-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBZ5927B-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBZ5927B-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBZ5927B-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBZ5927B-M3/5B?
SMBZ5927B-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBZ5927B-M3/5B 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 SMBZ5927B-M3/5B?
For technical support, including SMBZ5927B-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBZ5927B-M3/5B requirements.
6.How does Aetrix verify that SMBZ5927B-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBZ5927B-M3/5B 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 SMBZ5927B-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBZ5927B-M3/5B?
All SMBZ5927B-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBZ5927B-M3/5B, 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 SMBZ5927B-M3/5B part is unused and in its original packaging.
Return procedure for SMBZ5927B-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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