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Diodes Incorporated B170B-13-F
- Part No.:
- B170B-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B170B-13-F.pdf
- Description:
- DIODE SCHOTTKY 70V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
B170B-13-F from Diodes Incorporated is a 70 V, 1.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.79 V max forward voltage at 1.0 A and 0.5 mA max reverse leakage at rated VR, used for polarity protection and freewheeling in DC-DC converters and low-voltage power supplies.
For engineers reviewing the B170B-13-F datasheet, B170B-13-F pinout, B170B-13-F application, or B170B-13-F equivalent, key selection criteria include reverse voltage rating (70 V), thermal resistance (25 °C/W), junction-to-terminal construction, RoHS-compliant matte tin plating, and JEDEC-qualified reliability for industrial power conversion designs.
Technical Context
This Schottky rectifier employs guard ring die construction to suppress transient-induced avalanche breakdown and supports high-frequency switching with 80 pF typical junction capacitance at 4 V reverse bias. Its low VF and fast recovery enable high-efficiency operation in 60 Hz–MHz-range freewheeling and blocking applications.
Rated for continuous average forward current of 1.0 A at terminal temperature of +125°C, it withstands non-repetitive surge currents up to 30 A (8.3 ms half-sine) and operates across –65°C to +150°C ambient, with thermal resistance junction-to-terminal fixed at 25 °C/W under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - maximum repetitive reverse voltage before breakdown; sets safe DC blocking margin in 48 V systems |
| IO (AV) | 1.0 A @ TT = +125°C - continuous output current capability under thermally constrained PCB layout |
| VF (max) | 0.79 V @ IF = 1.0 A, TA = +25°C - low conduction loss enabling >92% efficiency in 5–12 V DC-DC outputs |
| IR (max) | 0.5 mA @ VR = 70 V, TA = +25°C - minimal standby power drain in battery-backed polarity protection |
| RθJT | 25 °C/W - quantifies thermal path resistance from junction to soldered terminal; guides heatsinking decisions |
| CT | 80 pF @ VR = 4 V, f = 1 MHz - limits high-frequency switching noise and EMI in SMPS snubber networks |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic, UL 94V-0 rated, cathode band polarity marking, 0.093 g mass. Terminals are matte tin-plated, solderable per MIL-STD-202 Method 208, qualified for 260°C/10 s reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in blocking/freewheeling configurations; low-impedance path during conduction |
| Cathode | Forward current exit / reverse voltage reference | Marked by band; ties to load/ground node; defines reverse-bias voltage reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche during voltage transients, improving robustness in unregulated input rails |
| Low VF (0.79 V max) | Reduces I²R losses by ~35% vs. standard PN rectifiers at 1 A, lowering thermal stress in compact layouts |
| JEDEC-qualified reliability | Meets AEC-Q stress test standards for long-term stability in industrial power modules and automotive-adjacent systems |
| Halogen- and antimony-free "Green" compound | Complies with <900 ppm Br/Cl and <1000 ppm Sb; satisfies EU RoHS 3 and environmental procurement mandates |
Applications
| Polarity Protection | DC-DC Freewheeling |
|---|---|
Use Scenario: Reverse-voltage protection on 5–24 V input rails of microcontroller-based sensors and IoT edge nodes. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed between connector and LDO/regulator input. Use Value: Prevents damage from miswired power adapters while adding <0.8 V dropout-critical for low-VIN operation. | Use Scenario: Flyback diode across inductive loads in synchronous buck converter output stages. IC Role / Device Role / Timing Role: Freewheeling path for inductor current during high-side switch off-time. Use Value: Enables fast recovery with 80 pF capacitance and low VF, minimizing voltage spikes and conduction loss. |
| AC-DC Output Rectification | Blocking Diode in Solar Charge Controllers |
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–24 V at ≤1 A. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC bus. Use Value: Delivers 70 V reverse margin above 48 V peak output, with 0.5 mA IR ensuring minimal no-load leakage. | Use Scenario: Isolation diode between PV panel array and MPPT charge controller input. IC Role / Device Role / Timing Role: Prevents reverse current flow from battery to panel at night or under shading. Use Value: 70 V VRRM safely covers open-circuit panel voltages up to 60 V; low VF preserves harvestable energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB170-E3/52 | Same 70 V/1 A rating but SMB package variant from Vishay; VF = 0.85 V max at 1 A; RθJT = 30 °C/W | Slightly higher conduction loss and thermal resistance; less suitable for high-density thermal layouts | Select when cross-supply sourcing is required and 0.06 V VF penalty is acceptable |
| SS17-E3/57T | 1 A/70 V Schottky in SMA package; VF = 0.8 V max; CT = 110 pF; not AEC-Q qualified | Higher capacitance increases EMI risk in high-frequency SMPS; lacks automotive-grade reliability validation | Prefer for cost-sensitive consumer power supplies where JEDEC qualification is not mandated |
Compared with SB170-E3/52 and SS17-E3/57T, B170B-13-F delivers lower VF (0.79 V), superior thermal resistance (25 vs. 30 °C/W), and JEDEC-qualified reliability-making it optimal for thermally constrained, long-lifecycle industrial DC-DC and protection circuits.
Availability
B170B-13-F is available at Aetrix Electronics and suitable for polarity protection, DC-DC freewheeling, AC-DC output rectification, and solar charge controller blocking applications requiring stable component supply, consistent lead-free plating, and JEDEC-qualified reliability.
Supply support for B170B-13-F 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, manufacturing, and sales operations across Asia, Europe, and North America.
The B170/B series belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for low-loss, high-reliability power conversion in industrial, computing, and communications infrastructure where thermal efficiency and long-term stability are critical.
FAQ
What is the maximum junction temperature for B170B-13-F?
The device has an operating junction temperature range of –65°C to +150°C. It is rated for 1.0 A average forward current at terminal temperature +125°C, with thermal resistance junction-to-terminal of 25 °C/W. Derating is required above this temperature per Figure 3 in DS30018 Rev. 15–2.
Is B170B-13-F suitable for automotive applications?
No-B170B-13-F is not automotive-qualified. Diodes offers the B170Q and B170BQ variants, which are AEC-Q200 qualified and documented in separate datasheets. This part meets industrial JEDEC reliability standards but lacks automotive-specific stress testing and PPAP documentation.
What does the "B" suffix in B170B-13-F indicate?
The "B" denotes the SMB package variant (vs. "-13-F" alone, which indicates SMA). Per Diodes' ordering information, B170B-13-F specifies SMB packaging, 3,000-piece tape-and-reel, and lead-free matte tin plating-distinct from the SMA-packaged B170-13-F.
How does the guard ring construction improve performance?
The guard ring die structure reduces electric field crowding at the silicon periphery, suppressing premature edge avalanche during voltage transients. This extends operational life under repetitive surge conditions (e.g., IFSM = 30 A) and improves reliability in unregulated or noisy input environments without requiring external clamping.
B170B-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B170B-13-F FAQ
1.How can I place an order for B170B-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B170B-13-F 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 B170B-13-F reliable?
The price and inventory of B170B-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B170B-13-F is usually 5 days.
3.What payment methods are accepted for B170B-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B170B-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B170B-13-F?
B170B-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B170B-13-F 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 B170B-13-F?
For technical support, including B170B-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B170B-13-F requirements.
6.How does Aetrix verify that B170B-13-F is sourced from the original manufacturer or authorized distributors?
All B170B-13-F 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 B170B-13-F meets industry standards.
7.What is the process for return or replacement of B170B-13-F?
All B170B-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B170B-13-F, 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 B170B-13-F part is unused and in its original packaging.
Return procedure for B170B-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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