My Inquiry
My Account
Nexperia USA Inc. BC817DS-QX
- Part No.:
- BC817DS-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- SC-74, SOT-457
- Datasheet:
-
BC817DS-QX.pdf
- Description:
- TRANS 2NPN 45V 500MA 6-TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BC817DS-QX from Nexperia is an NPN/NPN dual general-purpose transistor in SOT457 (TSOP6) package, rated for 45 V VCEO, 500 mA continuous IC, and DC current gain (hFE) of 160–400 at IC = 100 mA. It serves as a compact, space-saving switching and amplification pair in discrete logic interfaces and power control stages of consumer and industrial PCBs.
For engineers reviewing the BC817DS-QX datasheet, BC817DS-QX pinout, BC817DS-QX application, or BC817DS-QX equivalent, key selection criteria include per-transistor VCEO/IC ratings, matched hFE spread, thermal resistance (Rth(j-a) = 208 K/W), and TSOP6 footprint compatibility with high-density reflow assembly.
Technical Context
The BC817DS-QX integrates two independent NPN transistors sharing no internal connection-each with separate emitter, base, and collector terminals. Its design supports discrete push-pull, phase-splitter, or dual-switch configurations without cross-coupling.
Thermal performance is defined for FR4 PCB mounting with 1 cm² copper pad per collector; total device Ptot is 600 mW at Tamb ≤ 25 °C, while per-transistor dissipation is limited to 370 mW. Junction temperature is rated to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage per transistor with base open; defines off-state blocking capability in switching applications. |
| IC | 500 mA - Continuous DC collector current per transistor; sets maximum steady-state load drive capacity. |
| hFE | 160–400 - DC current gain at VCE = 1 V, IC = 100 mA; determines base drive requirements for saturation in switch mode. |
| VCE(sat) | ≤ 700 mV - Collector-emitter saturation voltage at IC = 500 mA, IB = 50 mA; directly impacts conduction loss and thermal rise in on-state. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; indicates usable bandwidth for small-signal amplification up to ~10 MHz. |
| Rth(j-a) | 208 K/W - Thermal resistance junction-to-ambient under specified FR4 mounting; used to calculate ΔTj = Ptot × Rth(j-a). |
Pinout & Package
SOT457 (TSOP6) plastic surface-mount package: 6-pin, 1.3 mm pitch, 3.0 × 1.7 mm body, 0.95 mm max height; designed for automated placement and reflow soldering on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E1 | Emitter of Transistor 1 - Common reference node for TR1; connects to ground or low-side return path in switch configuration. |
| 2 | B1 | Base of Transistor 1 - Input control terminal for TR1; requires current-limited drive to achieve target hFE-based IC. |
| 3 | C2 | Collector of Transistor 2 - High-side output node for TR2; carries load current when TR2 is active. |
| 4 | E2 | Emitter of Transistor 2 - Reference node for TR2; may be tied to E1 for common-emitter dual-stage or left independent. |
| 5 | B2 | Base of Transistor 2 - Independent control input for TR2; enables asynchronous or complementary switching vs. TR1. |
| 6 | C1 | Collector of Transistor 1 - Primary output node for TR1; used for load switching, current mirroring, or signal inversion. |
Key Features
| Feature | Design Value |
|---|---|
| Dual NPN topology | Two electrically isolated NPN transistors in one TSOP6 package - reduces board area by ~40% vs. two discrete SOT23 devices. |
| Matched hFE range | 160–400 per transistor at identical test conditions - enables predictable, balanced current sharing in parallel or differential configurations. |
| Low VCE(sat) | ≤ 700 mV at IC = 500 mA - minimizes conduction loss and self-heating during sustained on-state operation. |
| FR4-optimized thermal design | Rth(j-a) = 208 K/W with 1 cm² collector pad - supports reliable 600 mW total device dissipation in standard PCB layouts. |
Applications
| LED Driver Stage | Logic-Level Signal Inverter |
|---|---|
Use Scenario: Driving multiplexed 20 mA LED segments in portable displays using microcontroller GPIOs. IC Role / Device Role / Timing Role: Dual NPN switch providing current sinking for column drivers and row enable control. Use Value: Single-package dual transistor eliminates routing congestion and ensures matched turn-on timing across display rows/columns. |
Use Scenario: Converting 3.3 V CMOS logic outputs to 5 V TTL-compatible levels in mixed-voltage interface boards. IC Role / Device Role / Timing Role: Active pull-down stage paired with external pull-up resistor to shift voltage thresholds. Use Value: Matched hFE and VCE(sat) ensure consistent propagation delay and noise margin across both inverter paths. |
| DC Motor Direction Control | Discrete H-Bridge Half-Bridge |
Use Scenario: Bidirectional control of small 12 V brushed DC motors in robotics actuators using PWM inputs. IC Role / Device Role / Timing Role: Two NPNs configured as high-side switches (with level-shifted bases) and low-side complements. Use Value: Shared thermal path and matched gain simplify gate drive design and prevent shoot-through during direction transitions. |
Use Scenario: Building cost-sensitive half-bridge drivers for solenoid or relay coils in HVAC control modules. IC Role / Device Role / Timing Role: One transistor handles high-current coil switching; the second provides feedback sensing or auxiliary load control. Use Value: Integrated dual layout avoids trace-length mismatches and improves EMI performance over discrete pairs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847DS | Lower VCEO (45 V same), lower IC (100 mA), higher hFE (110–800) - optimized for low-power signal amplification, not switching loads. | Not suitable for >200 mA switching; better for audio preamp or sensor buffering where gain linearity matters more than current handling. | Select BC847DS only when bias stability and low-noise gain outweigh current capacity needs. |
| MBT3904DW1T1G | Same VCEO (40 V), same IC (200 mA), tighter hFE binning (30–300), SOT-363 package - smaller footprint but lower thermal mass and power rating. | Limited to <300 mW total dissipation; unsuitable for sustained 500 mA operation due to higher Rth(j-a) (~300 K/W). | Choose MBT3904DW1T1G only for space-constrained, low-duty-cycle signal switching where thermal headroom is verified. |
Compared with BC847DS and MBT3904DW1T1G, BC817DS-QX uniquely balances 500 mA current capability, 45 V breakdown, and 600 mW thermal budget in TSOP6 - making it the only option among the three qualified for continuous medium-power switching in industrial control PCBs.
Availability
BC817DS-QX is available at Aetrix Electronics and suitable for LED driver stages, logic-level signal inverters, DC motor direction control, and discrete H-bridge half-bridge circuits requiring stable component supply and long-term production continuity.
Supply support for BC817DS-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability essential semiconductors - delivering robust discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BC817DS-QX belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, space-efficient replacement of dual discrete transistors in non-automotive industrial and consumer electronics.
FAQ
Is BC817DS-QX automotive-qualified?
No. Per Nexperia's revision history (v.4, October 2025), BC817DS-QX is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia recommends the -Q variant (e.g., BC817DS-Q series) or functionally equivalent automotive-qualified dual transistors.
Can BC817DS-QX replace two individual BC817 transistors?
Yes - with layout and thermal considerations. The BC817DS-QX integrates two BC817-equivalent NPN transistors in one TSOP6 package. Pin mapping matches discrete BC817 SOT-23 footprints when wired correctly (e.g., C1/B1/E1 and C2/B2/E2). However, shared thermal mass means simultaneous full-load operation requires derating per the 600 mW total Ptot limit.
What is the maximum safe operating frequency for switching?
While fT is 100 MHz, practical hard-switching frequency is limited by stored charge and VCE(sat) recovery. At IC = 500 mA and VCC = 12 V, reliable PWM operation is confirmed up to 100 kHz with adequate base drive (IB ≥ 50 mA) and PCB copper thermal relief. Above this, switching losses increase significantly.
Does BC817DS-QX support common-emitter or common-collector configurations?
Yes - all standard BJT configurations are supported per transistor. Each has fully independent terminals: TR1 uses pins 1 (E1), 2 (B1), 6 (C1); TR2 uses pins 4 (E2), 5 (B2), 3 (C2). Common-emitter (C-out, E-ground, B-input) and common-collector (E-out, C-VCC, B-input) topologies are implementable without modification.
BC817DS-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 NPN
- Current - Collector (Ic) (Max):
- 500mA
- Voltage - Collector Emitter Breakdown (Max):
- 45V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 160 @ 100mA, 1V
- Power - Max:
- 370mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
BC817DS-QX FAQ
1.How can I place an order for BC817DS-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817DS-QX 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 BC817DS-QX reliable?
The price and inventory of BC817DS-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817DS-QX is usually 5 days.
3.What payment methods are accepted for BC817DS-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817DS-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817DS-QX?
BC817DS-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817DS-QX 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 BC817DS-QX?
For technical support, including BC817DS-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817DS-QX requirements.
6.How does Aetrix verify that BC817DS-QX is sourced from the original manufacturer or authorized distributors?
All BC817DS-QX 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 BC817DS-QX meets industry standards.
7.What is the process for return or replacement of BC817DS-QX?
All BC817DS-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC817DS-QX, 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 BC817DS-QX part is unused and in its original packaging.
Return procedure for BC817DS-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817DS-QX Tags
-
MBT3946DW1T1G
onsemi
-
BC846BPDW1T1G
onsemi
-
MBT2222ADW1T1G
onsemi
-
BC847BDW1T1G
onsemi
-
DMMT5401-7-F
Diodes Incorporated
-
DMMT5551-7-F
Diodes Incorporated
-
DMMT3904W-7-F
Diodes Incorporated
-
DMMT3906W-7-F
Diodes Incorporated
-
FMB3904
onsemi
-
FMB2222A
onsemi
-
ULQ2003D1013TR
STMicroelectronics
-
ZXTD4591E6TA
Diodes Incorporated
Tech Hub
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…
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…
