Request Quote
(Ships tomorrow)
BC817-25QBZ Equivalent & Substitute Parts
Part Overview
The BC817-25QBZ is a small-signal NPN bipolar junction transistor manufactured by Nexperia USA Inc. in a 3-XDFN Exposed Pad surface mount package with wettable flank configuration. This device is rated for 45 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 350 mW power dissipation, with a transition frequency of 100 MHz.
The BC817-25QBZ is classified as obsolete. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and field replacements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Transistor Type | NPN | — |
| Current - Collector (Ic) (Max) | 500 | mA |
| Voltage - Collector Emitter Breakdown (Max) | 45 | V |
| Vce Saturation (Max) @ Ib, Ic | 700 mV @ 50 mA, 500 mA | — |
| Current - Collector Cutoff (Max) | 100 | nA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 160 @ 100 mA, 1 V | — |
| Power - Max | 350 | mW |
| Frequency - Transition | 100 | MHz |
| Operating Temperature (TJ) | 150 | °C |
| Package / Case | 3-XDFN Exposed Pad | — |
| Mounting Type | Surface Mount, Wettable Flank | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the BC817-25QBZ is determined by electrical and mechanical parameter equivalence within the NPN small-signal bipolar transistor category. The critical parameters that define substitution eligibility are:
- Transistor polarity: NPN
- Maximum collector current: 500 mA
- Collector-emitter breakdown voltage: 45 V
- Saturation voltage characteristics: 700 mV @ 50 mA, 500 mA
- Collector cutoff current: 100 nA
- Minimum DC current gain: 160 @ 100 mA, 1 V
- Maximum power dissipation: 350 mW
- Transition frequency: 100 MHz
- Package type: 3-XDFN Exposed Pad with wettable flank
- Surface mount configuration
The BC817-25QB-QZ meets all electrical and mechanical requirements for direct substitution. Both parts share identical electrical specifications, package geometry, and thermal characteristics. The primary distinction is product status and packaging format.
Parameter Comparison
| Parameter | BC817-25QBZ (Main Part) | BC817-25QB-QZ (Substitute) | Match |
|---|---|---|---|
| Manufacturer | Nexperia USA Inc. | Nexperia USA Inc. | Yes |
| Transistor Type | NPN | NPN | Yes |
| Current - Collector (Ic) (Max) | 500 mA | 500 mA | Yes |
| Voltage - Collector Emitter Breakdown (Max) | 45 V | 45 V | Yes |
| Vce Saturation (Max) @ Ib, Ic | 700 mV @ 50 mA, 500 mA | 700 mV @ 50 mA, 500 mA | Yes |
| Current - Collector Cutoff (Max) | 100 nA | 100 nA | Yes |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 160 @ 100 mA, 1 V | 160 @ 100 mA, 1 V | Yes |
| Power - Max | 350 mW | 350 mW | Yes |
| Frequency - Transition | 100 MHz | 100 MHz | Yes |
| Operating Temperature (TJ) | 150°C | 150°C | Yes |
| Package / Case | 3-XDFN Exposed Pad | 3-XDFN Exposed Pad | Yes |
| Mounting Type | Surface Mount, Wettable Flank | Surface Mount, Wettable Flank | Yes |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Yes |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Yes |
| Product Status | Obsolete | Active | Different |
| Qualification | — | AEC-Q101 | Substitute has additional qualification |
| Grade | — | Automotive | Substitute has automotive grade |
Engineering Selection Recommendations
The BC817-25QB-QZ is a direct electrical and mechanical equivalent to the BC817-25QBZ. All critical electrical parameters, package specifications, and environmental compliance ratings are identical between the two parts.
The BC817-25QBZ is classified as obsolete, whereas the BC817-25QB-QZ maintains active product status. The BC817-25QB-QZ is additionally qualified to AEC-Q101 automotive standards and carries an automotive grade designation, providing enhanced reliability documentation and traceability for applications requiring automotive-level component qualification.
Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity classification. The packaging format differs between cut tape (CT) and Digi-Reel for the main part versus tape and reel (TR) for the substitute, but the physical package geometry and electrical interface remain identical.
For new designs and production builds, the BC817-25QB-QZ is the appropriate selection due to active product status and automotive qualification. For field replacements or legacy system maintenance where the BC817-25QBZ is specified, the BC817-25QB-QZ provides full functional and mechanical compatibility.
Frequently Asked Questions (FAQ)
Q: Can the BC817-25QB-QZ be used as a direct replacement for the BC817-25QBZ in existing designs?
A: Yes. The BC817-25QB-QZ is electrically and mechanically equivalent to the BC817-25QBZ. All electrical parameters, package dimensions, and thermal characteristics are identical. No circuit modifications are required.
Q: What is the difference between the cut tape and tape & reel packaging formats?
A: Cut tape (CT) and Digi-Reel packaging are distribution formats for the same physical component. Cut tape is supplied in individual strips, while tape & reel format provides components on continuous reels for automated assembly. The actual transistor package, electrical performance, and pin configuration are identical.
Q: Why does the BC817-25QB-QZ have AEC-Q101 qualification while the BC817-25QBZ does not?
A: AEC-Q101 is an automotive industry qualification standard. The BC817-25QB-QZ carries this qualification and automotive grade designation, indicating it has undergone additional reliability testing and documentation required for automotive applications. The BC817-25QBZ predates this qualification requirement or was not submitted for automotive qualification.
Q: Are there any thermal or frequency performance differences between these parts?
A: No. Both parts have identical maximum operating junction temperature (150°C), transition frequency (100 MHz), and power dissipation rating (350 mW).
Q: Can the BC817-25QB-QZ be used in applications originally designed for the BC817-25QBZ?
A: Yes. The BC817-25QB-QZ meets or exceeds all electrical and mechanical specifications of the BC817-25QBZ. It is suitable for all applications where the BC817-25QBZ was originally specified.
Q: What is the significance of the wettable flank feature on both parts?
A: The wettable flank is a package design feature that improves solder joint reliability and inspectability during surface mount assembly. Both the BC817-25QBZ and BC817-25QB-QZ incorporate this feature in their 3-XDFN Exposed Pad package.
Q: Are both parts RoHS compliant?
A: Yes. Both the BC817-25QBZ and BC817-25QB-QZ are ROHS3 compliant and REACH unaffected.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts