My Inquiry
My Account
Diodes Incorporated 1SMB5935B-13
- Part No.:
- 1SMB5935B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB5935B-13.pdf
- Description:
- DIODE ZENER 27V 550MW SMB
- Quantity:
- Payment:
- Shipping:
Inventory:1,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMB5935B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with nominal zener voltage of 27V (±5%), dynamic impedance of 13.9Ω at 23mA test current, and ESD rating >16kV per HBM. It provides precise voltage regulation in power supply rails, overvoltage protection circuits, and reference applications requiring stable breakdown under continuous DC or pulse conditions.
For engineers reviewing the 1SMB5935B-13 datasheet, 1SMB5935B-13 pinout, 1SMB5935B-13 application, or 1SMB5935B-13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (226°C/W), maximum reverse current (0.25µA at 20.6V), and SMB package compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals. Its 27V nominal zener voltage is specified at 23mA test current, with temperature coefficient optimized for mid-range voltage devices (~+4.5mV/°C typical).
The device uses a planar silicon junction structure encapsulated in an SMB molded plastic case rated UL 94V-0. Thermal performance is characterized by RθJA = 226°C/W on FR-4 PCB and RθJT = 25°C/W, enabling reliable 3.0W dissipation at terminal temperature ≤75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65–28.35V at IZT = 23mA; ensures ±5% regulation accuracy in voltage reference designs |
| Power Dissipation (PD) | 3.0W @ TL = +75°C; supports high-energy transient clamping without derating below 75°C |
| Zener Impedance (ZZT) | 13.9Ω @ IZT = 23mA; low dynamic impedance minimizes output voltage variation under load changes |
| Reverse Leakage (IR) | 0.25µA max @ VR = 20.6V; guarantees minimal quiescent current in standby-mode protection circuits |
| ESD Rating | Class 3 (>16kV) per HBM; eliminates need for external ESD protection in board-level interfaces |
| Thermal Resistance (RθJA) | 226°C/W on FR-4 PCB; defines required copper area and airflow for thermal management |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case with cathode band marking; dimensions: 3.30–3.94mm (L) × 4.06–4.57mm (W) × 1.96–2.21mm (H); weight ≈0.096g; RoHS-compliant matte tin-plated copper alloy leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Low-side connection in shunt regulator | Connected to ground or lower-potential node; carries full load current during regulation |
| Cathode | Zener breakdown terminal / High-side connection in shunt regulator | Connected to input rail; maintains regulated voltage at cathode-to-anode potential |
Key Features
| Feature | Design Value |
|---|---|
| 3.0W Power Handling | Enables robust overvoltage clamping in 24V industrial power rails without external heatsinking |
| ±5% Zener Tolerance | Reduces binning requirements and simplifies BOM management for precision reference designs |
| ESD Class 3 (>16kV HBM) | Eliminates need for discrete TVS diodes in USB, GPIO, and sensor interface protection |
| SMB Surface-Mount Package | Supports high-speed pick-and-place assembly and reflow soldering per J-STD-020 Level 1 moisture sensitivity |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing 24V intermediate bus in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining ±1% output stability under 10–100mA load transients. Use Value: Replaces bulkier through-hole Zeners while delivering identical regulation accuracy and 3× higher power density. | Use Scenario: Providing stable 27V reference for analog front-end circuitry in engine control unit (ECU) sensor signal conditioning. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and op-amp feedback networks. Use Value: Maintains reference integrity across -40°C to +125°C ambient with <±0.1%/°C drift contribution. |
| Overvoltage Protection for CAN Transceivers | LED Driver Current Regulation |
Use Scenario: Clamping induced transients on CAN_H/CAN_L lines during load dump events in automotive body control modules. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting line voltage to 28.35V peak during 100ns–1µs surges. Use Value: Absorbs up to 3.0W pulse energy without degradation, meeting ISO 7637-2 Pulse 5a requirements. | Use Scenario: Setting constant current for high-brightness LED strings in commercial lighting drivers. IC Role / Device Role / Timing Role: Voltage reference element in adjustable current-sense amplifier feedback loop. Use Value: Enables ±5% LED current accuracy across 10:1 dimming range with no calibration required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5354B | Same 27V nominal zener voltage but DO-201AD package; PD = 5W; RθJA = 30°C/W (with heatsink) | Through-hole mounting only; requires manual insertion or wave soldering; unsuitable for high-density SMT layouts | Select when higher continuous power handling is needed and board space allows axial/DO-201AD footprint |
| BZX84-C27 | 27V zener in SOT-23; PD = 300mW; ZZT = 80Ω @ 5mA; ±5% tolerance | Lower power rating limits use to signal-level references; not suitable for power rail clamping | Select for low-current biasing or portable electronics where 0.3W dissipation suffices |
Compared with 1N5354B and BZX84-C27, the 1SMB5935B-13 uniquely balances 3.0W SMT power handling, low 13.9Ω impedance, and industry-standard SMB footprint-making it optimal for space-constrained industrial and automotive power regulation where both thermal performance and assembly compatibility matter.
Availability
1SMB5935B-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU voltage reference, and overvoltage protection requiring stable component supply across extended temperature ranges and high-reliability manufacturing environments.
Supply support for 1SMB5935B-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, specializing in high-reliability components for industrial, automotive, and computing markets with ISO/TS 16949 and ISO 9001 certification.
The SMB-series Zener diodes are engineered for high-power surface-mount voltage regulation and transient suppression, targeting applications demanding robustness, automated assembly compatibility, and tight parametric control in harsh operating environments.
FAQ
What is the maximum continuous zener current for 1SMB5935B-13 at 25°C ambient?
The maximum continuous zener current is calculated from PD = 550mW at TA = +25°C and VZ = 27V, yielding IZM ≈ 20.4mA. This value decreases linearly above 25°C at 4.4mW/°C, reaching 23mA only at elevated case temperature where thermal design permits.
Does 1SMB5935B-13 support reflow soldering per JEDEC J-STD-020?
Yes, the device is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be subjected to unlimited floor life and standard Pb-free reflow profiles (peak 260°C) without baking or special handling-ideal for high-volume SMT production.
How does the temperature coefficient affect regulation accuracy over -40°C to +125°C?
At 27V, the typical temperature coefficient is +4.5mV/°C. Over a 165°C span, this introduces ±0.74V drift, or ±2.7% of nominal VZ. For precision applications, this must be compensated via circuit design or selected alongside tighter-tolerance variants.
Can 1SMB5935B-13 replace older 1N4733A Zener diodes in existing designs?
No-1N4733A is a 5.1V, 1W through-hole Zener. The 1SMB5935B-13 is a 27V, 3W SMT device with different voltage, power, package, and thermal characteristics. Direct replacement would require schematic, layout, and thermal redesign.
1SMB5935B-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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 20.6 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
1SMB5935B-13 FAQ
1.How can I place an order for 1SMB5935B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB5935B-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 1SMB5935B-13 reliable?
The price and inventory of 1SMB5935B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5935B-13 is usually 5 days.
3.What payment methods are accepted for 1SMB5935B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5935B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB5935B-13?
1SMB5935B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB5935B-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 1SMB5935B-13?
For technical support, including 1SMB5935B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5935B-13 requirements.
6.How does Aetrix verify that 1SMB5935B-13 is sourced from the original manufacturer or authorized distributors?
All 1SMB5935B-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 1SMB5935B-13 meets industry standards.
7.What is the process for return or replacement of 1SMB5935B-13?
All 1SMB5935B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5935B-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 1SMB5935B-13 part is unused and in its original packaging.
Return procedure for 1SMB5935B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB5935B-13 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
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
