My Inquiry
My Account
Microchip Technology SMBG5385C/TR13
- Part No.:
- SMBG5385C/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5385C/TR13.pdf
- Description:
- DIODE ZENER 170V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,781
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG5385C/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 170 V, ±2% tolerance (C suffix), 8.0 mA test current (IZT), and 380 Ω maximum dynamic impedance at IZT - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5385C/TR13 datasheet, SMBG5385C/TR13 pinout, SMBG5385C/TR13 application, or SMBG5385C/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (1750 A), thermal resistance (25 °C/W junction-to-lead), and DO-215AA gull-wing package compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage across wide current (8.0 mA to 29.4 mA IZM) and temperature (-65 °C to +150 °C) ranges. Its low dynamic impedance (380 Ω at IZT) ensures minimal voltage variation under load transients.
The SMBG5385C/TR13 features a moisture sensitivity level 1 rating per J-STD-020B, eliminating dry-pack requirements, and withstands 8.3 ms half-sine surge currents up to 1750 A - critical for transient suppression in industrial DC bus lines and telecom power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 170 V ±2% - precise reference for 160–180 V regulated rails |
| Test Current (IZT) | 8.0 mA - defined operating point for VZ measurement and impedance characterization |
| Max Dynamic Impedance (ZZT) | 380 Ω - limits voltage deviation under small-signal AC modulation |
| Max Regulator Current (IZM) | 29.4 mA - maximum continuous DC current at rated 5 W dissipation with proper heat sinking |
| Surge Current (IZSM) | 1750 A (8.3 ms half-sine) - handles high-energy transients without failure |
| Junction-to-Lead Thermal Resistance | 25 °C/W - enables efficient heat transfer to PCB copper when mounted per recommended footprint |
| Reverse Leakage (IR) | 0.5 µA @ 137 V - ensures negligible standby power loss in high-impedance bias networks |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; anode and cathode terminals only - polarity-critical for reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Positive terminal in reverse-bias configuration | Connected to regulated output node; voltage referenced to this terminal |
| Anode | Negative terminal in reverse-biase configuration | Connected to ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter regulation margins than ±5% (B) or ±10% (A) variants in feedback sensing |
| Moisture Sensitivity Level 1 | Eliminates baking requirement before reflow, reducing manufacturing cost and process risk |
| Gull-wing lead form (DO-215AA) | Provides visible solder joints for automated optical inspection (AOI) and reliable rework access |
| RoHS-compliant matte-tin plating | Meets environmental compliance without sacrificing solderability or intermetallic reliability |
| Non-sensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD workstations during assembly |
Applications
| Industrial Power Supply Feedback | Telecom DC Bus Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing error amplifier reference in isolated flyback converters delivering 160–180 V output. IC Role / Device Role / Timing Role: Precision voltage reference element in secondary-side regulation loop. Use Value: ±2% VZ tolerance maintains output regulation within ±1.5% over line/load/temperature, reducing need for post-regulation trimming. |
Use Scenario: Clamping transient spikes on -48 V telecom distribution buses during hot-swap events. IC Role / Device Role / Timing Role: High-energy surge suppressor placed across bus rails with series current-limiting resistor. Use Value: 1750 A surge rating absorbs 8.3 ms transients without degradation, extending system uptime in central office environments. |
| Automotive Battery Monitoring | Medical Imaging HV Bias Protection |
Use Scenario: Overvoltage detection in 12 V battery monitoring ICs during load-dump conditions. IC Role / Device Role / Timing Role: Threshold detector triggering shutdown logic when battery exceeds safe limit. Use Value: Low leakage (0.5 µA @ 137 V) prevents false triggers in high-impedance sense networks, improving fault detection reliability. |
Use Scenario: Protecting X-ray generator control circuitry from HV coupling transients during tube firing. IC Role / Device Role / Timing Role: Fast-response clamp limiting coupled noise to <200 V peak on analog front-end inputs. Use Value: 25 °C/W RθJL enables direct thermal coupling to metal-core PCB, sustaining repeated 1750 A surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5385C | Axial-leaded T-18 package; identical electrical specs but no gull-wing solder visibility | Requires through-hole assembly; unsuitable for SMT-only production lines | Select when legacy board design mandates axial components or manual repair is preferred |
| SMBJ5385C | DO-214AA J-bend package; same VZ, IZT, and IZM, but higher RθJA (125 °C/W vs. 90 °C/W) | Lower thermal performance on FR4; requires larger copper area for equivalent power handling | Select when existing footprint uses DO-214AA or when gull-wing inspection is not required |
Compared with SMBG5385C/TR13, 1N5385C offers identical regulation performance but lacks SMT manufacturability, while SMBJ5385C trades thermal efficiency for footprint compatibility - making SMBG5385C/TR13 optimal for high-reliability, high-density, and AOI-capable production.
Availability
SMBG5385C/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and automotive battery management systems requiring stable component supply and full RoHS compliance.
Supply support for SMBG5385C/TR13 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
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The SMBG53xx series was designed specifically for surface-mount voltage regulation and transient suppression in space-constrained, high-stress power systems - emphasizing thermal robustness, surge resilience, and process compatibility.
FAQ
What is the Zener voltage tolerance of SMBG5385C/TR13?
The SMBG5385C/TR13 has a ±2% Zener voltage tolerance, confirmed by the "C" suffix in its part number per Microsemi's nomenclature. This means its breakdown voltage is guaranteed between 166.6 V and 173.4 V at 8.0 mA test current and 25 °C ambient - enabling tighter regulation in feedback networks compared to ±5% (B) or ±10% (A) variants.
Does SMBG5385C/TR13 require dry packing before reflow soldering?
No, SMBG5385C/TR13 does not require dry packing. It carries a moisture sensitivity level (MSL) 1 rating per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at standard factory conditions (<30 °C / 60% RH) without baking prior to reflow - simplifying inventory handling and reducing manufacturing overhead.
What is the maximum continuous Zener current for SMBG5385C/TR13?
The maximum continuous Zener current (IZM) for SMBG5385C/TR13 is 29.4 mA at 25 °C lead temperature. This value is derived from its 5.0 W power rating and upper-tolerance Zener voltage (173.4 V), ensuring safe operation when properly heatsinked - exceeding the 28 mA typical for ±5% variants due to tighter voltage bounds.
Can SMBG5385C/TR13 be used in place of SMBJ5385C?
SMBG5385C/TR13 is not a pin-compatible replacement for SMBJ5385C due to different package geometries: SMBG uses DO-215AA gull-wing leads, while SMBJ uses DO-214AA J-bends. Though electrically equivalent, PCB layout changes are required - especially for solder joint inspection and thermal pad design - making them functionally interchangeable only with board revision.
What surge waveform does the 1750 A rating for SMBG5385C/TR13 represent?
The 1750 A surge current rating for SMBG5385C/TR13 applies to a non-repetitive 8.3 ms half-sine wave, as defined in Note 4 of the datasheet. This waveform models common AC line transients and load-dump events, and the device sustains this stress without parametric shift or catastrophic failure when mounted per Microsemi's recommended footprint on FR4 with 1 oz copper.
SMBG5385C/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-215AA, SMB Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 170 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 380 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 122 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG5385C/TR13 FAQ
1.How can I place an order for SMBG5385C/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5385C/TR13 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 SMBG5385C/TR13 reliable?
The price and inventory of SMBG5385C/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5385C/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5385C/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5385C/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5385C/TR13?
SMBG5385C/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5385C/TR13 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 SMBG5385C/TR13?
For technical support, including SMBG5385C/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5385C/TR13 requirements.
6.How does Aetrix verify that SMBG5385C/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5385C/TR13 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 SMBG5385C/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5385C/TR13?
All SMBG5385C/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5385C/TR13, 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 SMBG5385C/TR13 part is unused and in its original packaging.
Return procedure for SMBG5385C/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5385C/TR13 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
