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Diodes Incorporated B170Q-13-F
- Part No.:
- B170Q-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B170Q-13-F.pdf
- Description:
- DIODE SCHOTTKY 70V 1A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,601
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Product details
Overview
B170Q-13-F from Diodes Incorporated is a 70 V, 1.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.79 V max forward voltage at 1.0 A and 0.5 mA max reverse leakage at rated VR, designed for polarity protection, DC-DC converter freewheeling, and automotive-grade power conversion circuits.
For engineers reviewing the B170Q-13-F datasheet, B170Q-13-F pinout, B170Q-13-F application, or B170Q-13-F equivalent, key selection criteria include its AEC-Q101 qualification, 30 A non-repetitive surge rating, 25 °C/W junction-to-terminal thermal resistance, and compatibility with automated SMT assembly under +260°C/10s reflow profiles.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and supports high-frequency switching in low-voltage-drop applications. Its 80 pF typical capacitance at 4 V reverse bias and 0.69 V typical VF at 100°C enable stable operation in DC-DC flyback and buck converters.
The device operates across –65°C to +150°C, with thermal derating beginning above +125°C terminal temperature and full-rated 1.0 A average forward current maintained only when TT ≤ +125°C per Fig. 3 of DS38613 Rev. 3-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for blocking capability in DC-DC input stages |
| IO (AV) | 1.0 A @ TT = +125°C - Continuous forward current rating under thermal-limited conditions; defines usable output current in compact layouts |
| VF max | 0.79 V @ IF = 1.0 A, TA = +25°C - Peak forward drop determining conduction loss and thermal rise in high-efficiency designs |
| IR max | 0.5 mA @ VR = 70 V, TA = +25°C - Reverse leakage limiting standby power loss in battery-backed or always-on systems |
| IFSM | 30 A @ 8.3 ms half-sine - Surge withstand capacity for inrush and fault transients without bond-wire fusing |
| RθJT | 25 °C/W - Junction-to-terminal thermal resistance; enables direct heatsinking via PCB copper pad without external heatsink |
| CT | 80 pF @ VR = 4 V, f = 1 MHz - Junction capacitance affecting high-frequency switching noise and EMI filter design |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated terminals, cathode band marking, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires low-inductance trace routing |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., output capacitor positive); determines reverse voltage stress |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without requiring external TVS in 12 V automotive load-dump environments |
| AEC-Q101 qualification | Validates reliability for under-hood automotive use including engine control units and body electronics |
| +260°C/10s solder tolerance | Enables compatibility with standard lead-free reflow profiles without delamination or plating degradation |
| Halogen- and antimony-free "Green" compound | Meets IEC 61249-2-21 requirements with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb |
Applications
| Polarity Protection | DC-DC Freewheeling |
|---|---|
Use Scenario: Reverse-battery connection protection in 12 V automotive infotainment modules. IC Role / Device Role / Timing Role: Blocking diode placed between input connector and main power rail. Use Value: Prevents damage during service installation with 0.79 V drop minimizing voltage loss at 1.0 A load. | Use Scenario: Flyback path in synchronous buck converter for ADAS camera power supply. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductor current during high-side FET off-time. Use Value: 80 pF capacitance and low VF reduce switching losses and EMI generation at 500 kHz operation. |
| Re-Circulating Diode | Blocking Diode |
Use Scenario: Inductive load suppression in automotive seat motor drivers. IC Role / Device Role / Timing Role: Recirculation path for back-EMF energy during PWM turn-off. Use Value: 30 A IFSM rating handles peak inductive spikes without failure during 100% duty-cycle braking. | Use Scenario: Isolation between dual 12 V battery banks in commercial vehicle telematics. IC Role / Device Role / Timing Role: Unidirectional isolation element preventing cross-battery discharge. Use Value: 0.5 mA IR max at +25°C ensures <6 µW standby loss per diode, critical for long-term parking modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB170-E3/54 (Vishay) | Same 70 V VRRM, 1.0 A IO, but VF = 0.85 V max; SMA package with different marking layout | Not AEC-Q101 qualified; limited to industrial/commercial use | Select if automotive qualification is not required and higher VF is acceptable |
| SS17 (ON Semiconductor) | 70 V VRRM, 1.0 A IO, VF = 0.75 V typ at 1.0 A, but IR = 1.0 mA max at 25°C | Lacks AEC-Q101 certification and guard ring construction | Prefer where lower forward drop is prioritized over transient robustness and automotive compliance |
Compared with SB170-E3/54 and SS17, B170Q-13-F delivers verified automotive reliability, tighter IR control, and integrated transient hardening-making it the sole choice for safety-critical 12 V systems requiring PPAP documentation and IATF 16949 traceability.
Availability
B170Q-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC power supplies, and battery-powered portable instrumentation requiring stable component supply, AEC-Q101 compliance, and RoHS/Green manufacturing.
Supply support for B170Q-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, specializing in high-reliability power management, signal integrity, and protection solutions.
The B170Q series belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for low-loss, high-surge, and thermally robust operation in harsh-environment 12 V and 24 V vehicle subsystems.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The B170Q-13-F has an operating temperature range of –65°C to +150°C, but its 1.0 A average forward current rating is only guaranteed up to +125°C terminal temperature. Exceeding this requires derating per Fig. 3 in DS38613, where current drops linearly to zero at +150°C.
Is the cathode band orientation consistent across all SMA-packaged Diodes Inc. rectifiers?
Yes-the cathode band on B170Q-13-F is located at the same end as the marking code (B170) and aligns with industry-standard SMA polarity convention. The band marks the cathode terminal, which must connect toward the higher-potential node in forward-biased operation.
Does the "-13-F" suffix indicate tape-and-reel packaging and lead-free finish?
Yes: "-13" denotes 5,000-piece tape-and-reel packaging per EIA-481 standard, and "-F" confirms lead-free (matte tin) plating compliant with RoHS 2011/65/EU and halogen-free definitions per Diodes Inc.'s Green policy.
Can B170Q-13-F replace B180Q-13-F in a 12 V system with 16 V load dump?
No-B170Q-13-F has 70 V VRRM, insufficient for 16 V load dump (which generates ≥35 V transients). B180Q-13-F (80 V VRRM) or higher-rated variants are required to maintain margin above worst-case reverse stress in automotive ISO 7637-2 compliant designs.
B170Q-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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:
- -
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 155°C
B170Q-13-F FAQ
1.How can I place an order for B170Q-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B170Q-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 B170Q-13-F reliable?
The price and inventory of B170Q-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 B170Q-13-F is usually 5 days.
3.What payment methods are accepted for B170Q-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B170Q-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B170Q-13-F?
B170Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B170Q-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 B170Q-13-F?
For technical support, including B170Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B170Q-13-F requirements.
6.How does Aetrix verify that B170Q-13-F is sourced from the original manufacturer or authorized distributors?
All B170Q-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 B170Q-13-F meets industry standards.
7.What is the process for return or replacement of B170Q-13-F?
All B170Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B170Q-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 B170Q-13-F part is unused and in its original packaging.
Return procedure for B170Q-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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