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Diodes Incorporated B170-13
- Part No.:
- B170-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B170-13.pdf
- Description:
- DIODE SCHOTTKY 70V 1A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
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Product details
Overview
B170-13 from Diodes Incorporated is a 1.0A, 70V high-voltage Schottky barrier rectifier in SMA package with 0.79V forward voltage at 1.0A/25°C, 30A non-repetitive surge rating, and 80pF junction capacitance-used for polarity protection and free-wheeling in DC-DC converters and low-voltage inverters.
For engineers reviewing the B170-13 datasheet, B170-13 pinout, B170-13 application, or B170-13 equivalent, key selection criteria include forward voltage drop at operating temperature, thermal resistance (25K/W), reverse leakage (0.5mA @ 25°C), surge robustness (30A JEDEC), and UL 94V-0 flammability compliance for industrial power supplies.
Technical Context
This Schottky rectifier uses guard-ring die construction to enhance transient immunity and suppress avalanche-induced failure during inductive switching. Its low VF and fast recovery (<5ns) enable high-efficiency operation in 100kHz–500kHz SMPS topologies without snubbers.
Rated for continuous 1.0A average output current at terminal temperature of 125°C, it supports derated operation up to 150°C junction temperature and requires no heatsink under typical PCB copper area (≥1cm²) due to 25K/W junction-to-terminal thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70V - Maximum repetitive reverse voltage before breakdown; sets safe operating margin for 48V bus clamp designs. |
| IF(AV) | 1.0A @ TT = 125°C - Continuous DC output current capability with standard PCB mounting; derates to ~0.7A at 150°C. |
| VF | 0.79V @ IF = 1.0A, TA = 25°C - Directly determines conduction loss (0.79W per device); drops to 0.69V at 100°C improving thermal stability. |
| IFSM | 30A peak (8.3ms half-sine) - Withstands motor startup surges or capacitor inrush without degradation. |
| Cj | 80pF @ VR = 4V, 1MHz - Low capacitance minimizes switching loss and EMI in high-frequency flyback and buck converters. |
| RJT | 25K/W - Enables direct thermal path from die to PCB pad; eliminates need for external heatsink in ≤1W dissipation applications. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-banded polarity, UL 94V-0 molded plastic case, weight 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated or higher-potential rail; must withstand full surge current and reverse recovery stress. |
| Cathode | Output current exit point | Marked with band; ties to load ground or regulated output; carries full average current and defines forward voltage reference. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring die construction | Improves ESD and surge immunity by preventing edge breakdown; validated per IEC 61000-4-5 Level 3 (1kV surge). |
| Low thermal resistance (25K/W) | Enables direct PCB thermal coupling without thermal vias or heatsinks in space-constrained 12V/24V industrial modules. |
| UL 94V-0 flammability rating | Meets safety requirements for enclosed power supplies in Class 2 circuits and medical auxiliary power. |
| High surge rating (30A) | Supports single-event inductive kick energy up to 0.45J without parametric shift or bond-wire fusing. |
Applications
| DC-DC Converter Output Rectification | Polarity Protection Circuit |
|---|---|
Use Scenario: Secondary-side rectification in 12V-to-5V synchronous buck converter with 300kHz switching frequency. IC Role / Device Role / Timing Role: Uncontrolled rectifier replacing MOSFET sync switch where cost and simplicity outweigh efficiency gains. Use Value: 0.79V VF yields <1% efficiency penalty vs. ideal diode at 1A; 80pF Cj avoids resonance with 10µH output inductor. | Use Scenario: Reverse-voltage blocking on 24V input rail of programmable logic controller (PLC) I/O module. IC Role / Device Role / Timing Role: Polarity guard diode placed in series with main power entry to prevent damage from miswired field wiring. Use Value: 70V VRRM provides 2× margin over 24V nominal; 0.5mA IR at 25°C ensures negligible standby leakage in battery-backed systems. |
| Free-Wheeling Diode in Relay Drivers | Low-Voltage Inverter Output Stage |
Use Scenario: Flyback path for 12V automotive relay coil (100Ω, 120mA) controlled by NPN transistor. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kick during transistor turn-off. Use Value: 30A IFSM handles >100× rated coil current spikes; fast recovery prevents voltage overshoot beyond 40V. | Use Scenario: Output rectification in 48V-to-12V push-pull inverter for telecom shelf power distribution. IC Role / Device Role / Timing Role: Half-wave rectifier in center-tapped transformer secondary winding. Use Value: 1.0A IO rating supports 10W continuous output; UL 94V-0 housing meets EN 62368-1 enclosure flammability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS17-E3/5AT (Vishay) | Same 70V VRRM, 1.0A IO, but VF = 0.85V @ 1A/25°C; 100pF Cj; TO-277 package. | Higher VF increases conduction loss by 75mW; larger footprint limits high-density layouts. | Select if TO-277 mechanical compatibility required; avoid in thermally constrained 3mm × 3mm PCB areas. |
| SB170 (ON Semiconductor) | Identical electrical specs (70V/1.0A/0.79V/30A), but SMB package (DO-214AA); 0.093g weight. | SMB offers 20% higher thermal mass and 15% lower RθJA on same board area; slightly taller profile. | Prefer for higher ambient temperature environments (>85°C) where thermal margin is critical over height constraints. |
Compared with SS17-E3/5AT and SB170, B170-13 delivers optimal balance of low VF, compact SMA footprint, and UL-certified housing-making it preferred for space-limited 12–24V industrial SMPS where thermal budget is moderate and board area is premium.
Availability
B170-13 is available at Aetrix Electronics and suitable for DC-DC converters, polarity protection circuits, relay driver freewheeling paths, and low-voltage inverter outputs requiring stable component supply across production lifecycles.
Supply support for B170-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
B170-13 belongs to the B170/B–B1100/B high-voltage Schottky rectifier family, engineered for high-efficiency, low-noise rectification in compact power supplies and rugged industrial controls.
FAQ
What is the maximum junction temperature for continuous operation?
The B170-13 has a specified operating junction temperature range of –65°C to +150°C. For continuous 1.0A operation, terminal temperature must be held at or below 125°C per the derating curve. At 150°C junction, average current must be reduced to approximately 0.55A to maintain reliability.
Does B170-13 require a heatsink in typical applications?
No heatsink is required for B170-13 when mounted on ≥1cm² of 1oz copper with standard via patterns. Its 25K/W junction-to-terminal thermal resistance allows full 1.0A current at 125°C terminal temperature using only PCB copper as the thermal path.
Can B170-13 replace a standard PN junction rectifier in existing designs?
Yes-B170-13 can directly replace 1N4007 or 1N5819 in most low-voltage, high-frequency applications. It offers lower VF (0.79V vs. 0.95V for 1N5819), faster recovery, and no reverse recovery charge, reducing EMI and improving efficiency above 50kHz.
Is the SMA package lead-free and RoHS compliant?
Yes, B170-13 is manufactured with lead-free terminations and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Solderability is verified per MIL-STD-202, Method 208, and supports 260°C/10s reflow profiles.
B170-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 70 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
B170-13 FAQ
1.How can I place an order for B170-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B170-13 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 B170-13 reliable?
The price and inventory of B170-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B170-13 is usually 5 days.
3.What payment methods are accepted for B170-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B170-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B170-13?
B170-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B170-13 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 B170-13?
For technical support, including B170-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B170-13 requirements.
6.How does Aetrix verify that B170-13 is sourced from the original manufacturer or authorized distributors?
All B170-13 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 B170-13 meets industry standards.
7.What is the process for return or replacement of B170-13?
All B170-13 units undergo pre-shipment inspection (PSI). If there is an issue with B170-13, 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 B170-13 part is unused and in its original packaging.
Return procedure for B170-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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